Where to install water pressure regulator. Water pressure regulator: for which you need, device and configuration. Device and principle of water pressure relay

This section presents the supplied automatic fluid flow regulators (water, petroleum products, etc.).
URD-3. - Controller flow and pressure universal. Execution "But" - normally open (regulation "after yourself"), do URR-25,32,50,65,80mm (8-80 m3 / h); up to 150s, 1,6 mp.
URD-2 - Controller flow and pressure Universal Du-25-150mm (analogue of URD-3 and outdated URR-M).
RR-25 ... 100 - water flow regulator (Du - 25mm, 40mm, 50mm, 80mm, 100mm).
RRMK-5. - fluid flow controller (oil) within a given pressure drop.
RRG. - High pressure fluid flow regulators.
Pp-no - Direct-acting flow regulator (pressure drop) normally open. RR works without an extraneous energy source, designed to automatically maintain a given pressure or pressure drop of liquid, gas and vapor media. Du PR-n-25, -32, -40-50, -80, -100mm, pressure up to 1,6 mm (water, gas, steam, air). The connecting dimensions of the flanges according to GOST 12815-80. The principle of operation of the RR regulator is based on equilibrate the strength of the elastic deformation of the spring setting of the force generated by the adjustable medium on the membrane node.
VRPD-FN but Pressure pressure regulator of the direct action of the VRPD-FN-but with a fixed setting (FN) normally open (but "after yourself") flange (cast iron). DN-15 20 25 32 40 50mm, up to 16MPA, DP to 0.3 mp, setting from 0.05 mp, Wednesday TIS up to 150 ° C, UHL4.2 (TOS + 1 + 40 ° С, Humidity up to 80%) . Shmill
VRPD-NO. Pressure Pressure Pressure Regulator VRPD-BUT Normally Open (but- "After Himself") Flange (cast iron). DN-15 ... 150mm, up to 16MP, DP to 0.3 mp, setting from 0.05 mp, Wednesday TIS to 150 ° C, UHL4.2 (TOS + 1 + 40 ° С, Humidity up to 80%).
NDD-NZ The pressure regulator of the Direct Action NDD-NZ is normally closed (NZ- "after itself") flange (cast iron). DN-15 ... 150mm, up to 16MP, DP to 0.3 mp, setting from 0.05 mp, Wednesday TIS to 150 ° C, UHL4.2 (TOS + 1 + 40 ° С, Humidity up to 80%).
VDD-01-P-NZ With the function of "bypass", the pressure regulator of the direct action of the VDD-01-PN with the function of the "Fur" normally closed (NZ- "to itself") flange (cast iron). DN-15 ... 150mm, up to 16MP, DP to 0.3 mp, setting from 0.05 mp, Wednesday TIS to 150 ° C, UHL4.2 (TOS + 1 + 40 ° С, Humidity up to 80%).

Other types and brands of fluid flow regulators can also be supplied.
In addition to the above flow regulators (PP) of the fluid, we recommend to familiarize yourself with the following types of PP:
a) pp thermal energy (for example, RTE-1, etc.).
b) air pp (for example, RRV-1, etc.).
c) RP gas (eg RWG-1, etc.).
d) regulators technological (secondary control devices that perceive output unified signals from pressure drop sensors (Sapphire-22M-DD Sapphire-22M-DD type diffmaneometer, CAP, AIR-DD, DM, DM 3583M, and other), suitable in Complete with the root extraction unit for measuring the flow of pressure drop on standard tousing devices (diaphragms - DKS, DBS).
For details, see the section Pressure, subsections: Diffmamenes and transducers (sensors) of pressure difference.

Purpose, principle of operation and basic performances of fluid flow regulators

Fluid flow regulators are designed to automatically maintain a given flow rate, liquid (incl. Gas and steam-consulting) media non-aggressive to the materials of the regulator under operating conditions. The controls of the regulators are usually made of gray cast iron, steel casting or corrosion-resistant casting. The connecting dimensions of the flanges are performed according to GOST 12815-80.
Options Execution of flow regulators: "But" - regulation of the pressure "after itself".
The principle of operation is based on equilibrate the strength of the elastic deformation of the spring setting of the force generated by the adjustable medium on the membrane node.
Regulators are used in industrial installations, thermal items, water supply systems and other objects in accordance with their technical characteristics.
The device can be equipped with a filter of the corresponding diameter, responding with steel welded flanges.

The most common models of regulators have:
Diameters of the conditional passage Dn (DB) \u003d 25, 32, 40, 50, 80, 100 mm.
Conditional pressure PN (RU) up to 1,6 mP (16kgs / cm2), but higher values \u200b\u200bare possible.
The temperature of the adjustable medium to 180c.

Concepts, Definitions and Additional Information on Direct Action Pressure Regulators (RDPD)

Connection schemes for the inclusion of pressure regulators (hereinafter referred to as RD-nz) and pressure drop - flow (hereinafter RR):
a) RD-BU - assembly "But" - normally open RD; Adjustment of the pressure "After yourself" (bypaste mode).
b) RD-NZ - assembly "NZ" - normally closed RD; Adjustment of pressure "to yourself" (wrapping mode).
c) pp-but - assembly "But" - normally open RR; Regulation of pressure drop (RPD) - consumption (assembly "NZ" at the RPD-PP does not happen, because they are "flowing" flow control devices).

Pressure regulators (hereinafter referred to as RD) Direct Action (RDPD) NDD-NZ, Bypass VDD-01-NZ and regulators of the pressure drop (consumption) of direct action (RPDPD) VRPD-NO. Used to automatically maintain the necessary pressure or pressure difference (DD) of water in pipelines for various purposes by changing the flow, including (opening and closing) pipelines of heating systems (CO) and hot water supply (DHW).

With a certain connection scheme, the pressure drop regulators (RPD-but) can be used as flow regulators (RR).

The Direct Action RD is controlled devices for which the pressure of the occurring working medium supplies the energy necessary to reinstall the control valve. The management of the RD is carried out by means of a hydraulic membrane actuator (MIM), in the working chambers of which pressure from different parts of the pipeline (up to / after PD) is supplied.

The flow action is expressed in reducing or increasing pressure depending on the type of PD and the concept of the object.

The maximum allowable pressure drop on the RD is 0.4 MPa. To increase the service life of products and reduce noise levels, the pressure drop on the RD is recommended to receive no more than 0.2 MPa.

Pressure regulators (PD) and D.-flow drops (PP) of water are intended for use in automatic control systems for heat heating heat, hot water supply - DHW, ventilation, cold and hot water supply systems and other production and processing processes.

RD-BB / NH and RR - but are installed in individual thermal points (ITP) of residential and industrial buildings, central thermal points (CTP), boiler houses, CHPs, pumping stations and other objects on which heat energy is distributed or consumed, and Also on which preparation, distribution or consumption of cold or hot water systems of the RWP and DHW.

Water RD (VDDD-NZ, VDD-01-PN) and PP (Pressurized Pressure Curvea. VRPD-BUT) With proper use, it is successfully used to combat such negative processes in pipelines as an elevated noise level, vibration, trusting, Improvised by the standard operating mode of the object increase or oscillation (jumps, hydroedar) pressure.

Advantages of regulators of pressure of pressure VRPD-but

- small dimensions compared to the RPD of most other manufacturers;
- protection of the membrane from damage due to improper pressure supply;
- under the adjusting nut is installed bearing, which greatly facilitates the configuration process; When setting up for small values \u200b\u200bof the pressure drop, the nut can be rotated with hand without a wrench;
- in front of the holes in the water intake plunger in the discharge chamber located above the piston, a slit filter is set to prevent the discharge chamber;
- parts in contact with the working medium are made of materials, resistant to hot water;
- high quality surfaces of parts in contact with the working medium, which is ensured by processing on high-precision CNC machines manufactured by the United States and South Korea;
- the use of membranes and sealing rings of the production of Germany;
- several values \u200b\u200bof conditional bandwidth - kv for one nominal diameter of the conditional passage - DN;
At the request of the customer, regulators with non-standard KV values \u200b\u200bare made;
- Regulators are supplied with wide range of settings: (0.04-0.7) MPa or (0.2-1.2) MPa;
- the possibility of using pressure drop regulators as pressure regulators "after themselves";
- production of a wide range of regulators DN 15 ... DN 150;
- the ability to install in any position: on horizontal, vertical and inclined pipelines, a mustache up, down, to the side, in any direction;
- Threaded compounds located in the working environment are charged by high-temperature sealant, which prevents the possibility of self-ejecting parts during operation;
- The design of sealing rings excludes the possibility of their falling out or snacking during the operation of the RAP.

Equipment and Additional Equipment Pressure Regulators Direct Action (RDPD)

The types of additional equipment and the composition of the set of mounting and connecting parts (KMF / CRC DU15 ... 150mm) primarily depends on the installation and structural execution of the pressure regulator of the direct action (hereinafter referred to as RDPD), while the following main industrial designs distinguish:
- Threaded (coupling): Fastening through a special set of adhesives (antiques ("American") with a flange-threaded fitting, are used on pipelines of a small diameter of the conditional passage (Du-10, 15, 20, 25, 32, 40mm);
- Flange: Mortise - VRPD has its own flanges already welded to the body, made according to the requirements of the GOST, the installation is carried out to the pipeline's response flanges through fasteners (bolts / studs, nuts and washers).
- Interflate (Attaching the "Sandwich" type when the invested VRPD does not have its own flanges and clamping (tightened) with studs in the pipeline connector between the response flanges).

Types added. Equipment and equipment:
— Sets of assembly parts (km / kpch):connections, fasteners, sets of response flanges ("Cof" according to GOST 12820-80, 12821, etc.)
— Seals and fasteners (gaskets, bolts (studs), nuts, washers).
— Filters (To protect against solid particles to sealing surfaces and moving parts before the pressure regulator, it is recommended to install a mesh coarse filter).
— Elements of pipelines: transitions of cones with DU1 per DU2, straight sections (connecting sites) and other elements and welded parts.
Flange connection is regulated by GOST 12815-80, GOST 12820 or GOST 12821.

Additional equipment of controls, regulation and pressure and consumption (URR and thermal energy accounting nodes (UWE)):
- Pipeline accessories: Installation and shut-off fittings: cranes, valves, valves, connecting fittings, tees, slutters; Protective mesh coarse filters, mud and so on - see add. Equipment and fittings of consumption control devices.
— Mounting cabinets,dashboard shields, beds and racks.
— Pig: Computers, Pressure gauges, Diffma, thermometers, thermomanometers, relay sensors, alarms, temperature converters (thermocouples) and pressure, regulators, blocks (sources) of power, control units and other instruments and automatic blocks.

According to the consumer's request, the following documents can be sent.: map (form) of the order (questionnaire), pressure regulator passport (RD) and consumption (RR) of direct action (RDPD), certificate of conformity, type approval certificate, application permissions, declaration of conformity, technical description and manual , as well as other permits and regulatory documents (GOST, SANPIN, SNIVA, etc.).

Copyright © 2015-2017 All rights reserved,
The text is encrypted, copying is tracked and pursued;
Avt.- DV, Red.-FMB; Co-authors Vog / VEM, KC-M0 / P0.
GK Teproporbor - Production and sale of kipia: Pressure regulators (RD) and Delta - Consumption (RR) of Direct Action (RDPD) for closed and open water and steam systems of heat supply (CO / CTC), water supply (DHW, HPV) and regulation of other technological technological processes.
See technical information / characteristics of RDPD, price list (wholesale price), order form (how to choose, order and buy) pressure regulator (RD) and flow - flow (RR) of direct action (RDPD-nz) at the manufacturer price The presence and order from the warehouse in Moscow, the delivery / shipment of the TC (business lines and others) throughout the territory of the Russian Federation (other information on request - see the official website of the GK Heat Parborbor).

We will be happy if the above information was useful to you, as well as in advance, thank you for contacting any of the representative offices of the Teplopribor Group of Companies (three heat transfer, thermal controlle, industrial and other enterprises) and promise to make every effort to justify your trust.

One of the most important elements of the water pumping station control is the pressure switch. It provides automatic switching on and off, controlling the water supply to the tank according to the specified parameters. Clear recommendations, which should be the values \u200b\u200bof the limit levels of the lower and upper pressures, no. Each consumer decides it individually within acceptable norms and instructions.

Device and principle of water pressure relay

Constructively, the relay is performed as a compact block with maximum and minimum pressure springs, the tension of which is controlled by nuts. The membrane associated with springs responds to a change in pressure force. When the minimum value of the spring weakens, with a maximum level, it is shrinking stronger. The impact on the spring causes opening (closure) of the relay contacts, turning off or including the pump.

The presence of a relay in the water supply system allows for continuous pressure in the system and the necessary water pressure. The pump is controlled automatically. Properly exhibited providing its periodic shutdown, which contributes to a significant increase in the period of the trouble-free service.

The sequence of the pump station running the relay is as follows:

Pump pumps water into the tank.
Water pressure is constantly increasing that you can track the pressure gauge.
When the installed limit top pressure is reached, the relay is triggered and disables the pump.
As the water is spent in the tank, pressure is reduced. When it reaches the lower level, the pump will again turn on and the cycle will repeat.

Device Scheme and Composite Pressure Relay Elements

The main parameters of the relay work:

Lower pressure (inclusion level). Relay contacts, including the pump, closes, and water enters the tank.
Top pressure (shutdown level). Relay contacts open, the pump is turned off.
The pressure range is the difference between the two previous indicators.
The value of the maximum allowable shutdown pressure.

Setting up pressure relay

In the process of assembling the pumping station, special attention is paid to the pressure relay setting. From how correctly its limit levels will be exhibited, ease of operation, as well as the timing of the trouble-free service of all components of the device.

At the first stage, it is necessary to check the pressure that was created in the tank in the manufacture of a pumping station. Usually, in the factory conditions, the level of inclusion in 1.5 atmosphere is set, and the shutdown is 2.5 atmosphere. Check this with an empty tank and disconnected from the power supply of the pumping station. It is recommended to check the automotive mechanical pressure gauge. It is placed in a metal case, so measurements are obtained more accurate than using electronic or plastic pressure gauges. Their testimony may affect both the air temperature and the charge level of the battery. It is desirable that the limit of the gauge scale is as small as possible. Because on the scale, for example, in 50 atmospheres it will very difficult to accurately measure one atmosphere.

To check the pressure in the tank, you need to unscrew the cap, closing the spool, connect the pressure gauge and remove the reading by its scale. Air pressure should continue to periodically check, for example, once a month. Water should be completely removed from the tank, turning off the pump and opening all the cranes.

Another option is possible - carefully monitor the pump disconnection. If it has increased, it will mean a decrease in air pressure in the tank. The smaller the air pressure is, the greater the supply of water can be created. However, the pressure variation from the fully filled to almost devastated tank is obtained large, and all this will depend on the consumer preferences.

By selecting the desired mode of operation, you need to install it by hiding excess air for that, or drop additional. It should be borne in mind that one should not reduce the pressure to a value of less than one atmosphere, as well as to join it. Because of the small amount of air, the rubber container filled with water inside the tank will touch its walls and sway. And the surplus will not give the opportunity to pump a lot of water, because a significant part of the tank volume will occupy air.

Setting the pressure on and off pressure levels

Which are supplied with the collected form, the pressure switch is pre-installed in the optimal option. But when it is installed from various elements on site, the relay setting must be carried out. This is due to the need to ensure the effective relationship of the relay settings with the tank volume and pump pressure. In addition, it is necessary to change the initial pressure relay setting. The procedure should be as follows:

In practice, the power of pumps is chosen such that does not allow pumping the tank to the extreme limit. Usually, the disconnection pressure is set to a pair of atmospheres above the inclusion threshold.

The installation of limit pressure levels is allowed, which differ from the recommended values. In this way, you can specify your own version of the mode of operation of the pumping station. Moreover, when setting the pressure difference with a small nut, it is necessary to proceed from the fact that the bottom level is installed by a large nut. You can only set the top level within the limits of which the system is calculated. In addition, rubber hoses and other plumbers also withstand pressure, not higher than the estimated. All this must be considered when installing the pumping station. In addition, excessive water pressure from the crane is often completely unnecessary and uncomfortable.

Adjusting the pressure relay

Adjusting the pressure relay is practiced in cases where it is necessary to set up the levels of the upper and lower pressures in the specified values. For example, you need to set up the upper pressure of 3 atmospheres, the lower is 1.7 atmosphere. The process of adjustment is as follows:

Turn on the pump and pump water to the tank to the pressure value on the pressure gauge 3 atmosphere.
Disable pump.
Open the relay cover and slowly rotate a small nut until the relay works. The rotation of the nut clockwise means an increase in pressure in the opposite direction - a decrease. The upper level is set - 3 atmosphere.
Open a tap and drain the water from the tank to the pressure value on the pressure gauge 1.7 atmosphere.
Close the tap.
Open the relay lid and slowly rotate a large nut before the contacts are triggered. The lower level is set - 1.7 atmosphere. It must be somewhat larger than air pressure in the tank.

If high pressure is specified for shutdown and low - for inclusion, the tank is filled with plenty of water, and there is no need to turn on the pump often. Disadvantages occur only because of the large pressure drop when the tank is complete or almost empty. In other cases, when the pressure range is small, and the pump often has to pump, water pressure in the system is uniform and sufficiently comfortable.

In the next article you will find out - the most common connection schemes.

The article is talking about the adjustment of the water pressure regulator in the apartment.

The area of \u200b\u200bits application is described. The concept of the device is revealed.

The technical characteristics and principle of operation are presented.

The article has instructions, how to adjust the regulator, as well as photo and video.

Time does not stand still. The technologies with which devices come to us are, including aimed at minimizing expenses, improving ecology and control relating to various household situations.

It will be about the device of a small size that plays almost a dominant role in the fight against hydrowards, adjusting and controlling water pressure to a neutral value.

Adjusting device apply:

In production buildings.
Workshops.
In technological structures.
In homes intended for permanent residence.

Classification of pressure gearboxes

Instruments designed control water pressure Conditionally can be divided:

on dynamic;
and statistical products.

Dynamic

They provide adjustment of fluid flow in systems installed at industrial enterprises. Used in main pipelines.

Statistical

Most often mounted in places with unstable feed and uneven water consumption. This is a private sector and residential high-rise buildings.

FEATURE. The device is installed at the entrance to the apartment or house.

Pressure adjustment gearboxes divide:

on existing regulators;
statistical devices.

Existing

Work on the principle when there are no pressure, they are closed.

With an increase in pressure at the inlet, they control and limit the maximum level of incoming water. The existing regulators call "to themselves."

The second type of regulating device is called "after itself."

When there is no pressure - it is in the open position. In case of increasing the set maximum output pressure - closes.

Statistical

The regulator controls the pressure on an ongoing basis at the output.

Step-by-step instructions for the purchase and order of adjustment

The first step is the choice of regulating device. To make the right decision on its purchase in the store, you need to know the approximate water consumption in the apartment.

Before purchasing the device, read the technical information located in the accompanying price list.

If, the diameter of the purchased gearbox does not coincide with the indicators of the plumbing pipe, nothing terrible. You can buy and use adapters. You need to buy and stock up with two valves.

NOTE! If you use in the system of safety valves, the pressure at the output of the instrument is required by 20% less than the indicators of protected devices.

Summing up

There are variable hydraulic resistances that provide permanent consumption with a changing pressure at the inlet of the regulator. The simplest means of adjustment (restrictions) of the consumption are aperture (discs with a hole), on which excessive pressure is excessive pressure (pressure exceeding the working pressure of the reinforcement). The flow regulator with the spring consists of a housing in which the movable valve and spring is located. Water passes through the central hole in the valve and the adjustable gap between the housing and the valve. With an increase in the flow under the action of the hydrodynamic forces on the valve, the spring is compressed - the valve is approaching the saddle, reducing the area of \u200b\u200bthe passage section between the case and the valve. As a result, consumption decreases to the same value. The design of the RDTT regulator is more perfect.

In the regulating valve of the rotary type (Fig. 3.5), the amount of water is regulated by the change in the flow of the flow section as a result of the rotation of the spool relative to the valve sleeve attached in the housing. The spool turns through the lever, which moves from the remote control column (CDU), automatic control columns or thermostat.

In regulating valves of the gate type (Fig. 3.6), in contrast to the valves, the shutter is made in the form of a flat chiter in which there is a profiled hole. When the severity is moved, the flow of the flow hole is changed, which is achieved smooth regulation of the amount of flowing water. Such valves have a very small unregulated water skip.

Safety reinforcement

Safety valves include safety valves, check valves and air vent. This fittings are used in places where the formation of hydraulic impact is possible, increase pressure or reverse water current in pipelines. Valves can be springs and lever-cargo. Safety valves are mounted on hydropneumatic tanks, after pumps.

Check valves

Check valves (Fig. 3.7) are designed to automatically prevent the return current of water in the pipeline, for example, when stopping the pumps. Check valves can be lifting and swivel. In the rotary valve, the disc overlapping passage rotates on the axis. In the lifting valves, the drive is strengthened on the rod guide. Quick closing of the valve can cause a hydraulic blow in the pipeline. To eliminate this, the design of the check valves, in which the disk landing on the socket slows down with shock absorbers.

During the reconstruction or device of the new water supply system, it is usually planned to place all water consumption devices and the necessary structural elements. Most of these elements of the water supply system have sufficiently strict requirements on operating conditions, the violation of which leads to a decrease in service life. Such requirements include the maximum allowable pressure in pipelines. With a sharp rise in pressure in the system or hydraulic man. The water consumption instruments may fail. To eliminate the occurrence of such problems, it is necessary to establish a water pressure regulator (RDD) in the water supply system. About this device and will be discussed in today's review.

Read in the article:

What is the water pressure regulator in the water supply system of the apartment and at home

The main function that water pressure limiters is performed is the stabilization of the pressure in the system and maintain it at a given level, the prevention of the highway and the consumption devices from high loads and hydrowards. The RDV is a safety mechanism in a metal housing with an inlet and output threaded compound. The device can be supplied with a pressure gauge and an adjusting screw to adjust water pressure.

In private home ownership to maintain a constant pressure in the water supply system, two mandatory devices are required - and a hydroaccumulator. These elements through the highway are joined to the pump, and the water pressure relay in the water supply system is located between and the pump.

Devices are constructively divided into two types:

corrective fluid pressure in the pipeline to the RDV (plumbing calls such a regulator - "to themselves");
water pressure stabilizers, leading to the norm in the highway mounted for the device ("after herself").

The controller of the first type is able to automatically maintain the necessary water pressure in the highway due to the change in the valve cross section, which holds open to the establishment of a given pressure in the water supply system. This type of gearbox is mainly installed on pump nodes, in heating systems, etc.

To stabilize the water pressure in domestic pipelines, an aftermath controller is used. The device stabilizes the pressure in the water supply system as well as the RDV of the first type, but works completely differently.

With the principle of working relay to stabilize water pressure, you can see the video:

The device for stabilization is characterized by several features:

method of connecting to water supply. In the systems of private houses and apartments, install a RDV with a threaded (coupling) connection method, which is optimal for pipes with a diameter of 1-2 ". For larger diameters, gearboxes with flange compound type are used;
adjustment range;
the maximum pressure level of water at the exit;
the maximum range of temperatures of cold water supply to + 40˚C, and hot to + 70˚C.

The household regulator has a capacity of not more than 3 m 3 / h. Industrial water pipelines require devices with higher performance.

Device and principle of work of the RDV

Before considering how the water pressure reducer works, the scope of application of this device should be known. RDV is equipped with:

technological and utilities of water supply highways;
fire fighting water pipes and fire extinguishing systems;
water intake stations;
pumping stations of trunk pipelines;
melioration and irrigation systems.

Despite the fact that the principles of the pressure drop controller may differ, depending on the type of device, almost all of the RDV have the same design:

main working element (valve, piston);
spring and membrane;
mechanical or electronic control;
the throughput capacity of household devices is 0.5-3 m 3, commercial - 3-15 m 3, industrial -\u003e 15 m 3;
case from cast iron, brass, steel with chrome or nickel-plated coating.

The principle of operation of the water pressure reducer is similar to the functioning of the valve crane: the piston with a rod in its landing place creates a given lumen, thereby creating a fluid pressure of the necessary force. With a fixed piston at the outlet, the pressure changes in proportion to the stream at the inlet, and in the RDV the position of the valve depends on the ratio of the current head and the rigidity of the spring. The adjustment setting is performed due to the "pilot circuit": with an increase in the pressure force of the working medium, the water flow on the membrane, lowering the rod with the piston, thereby reducing the flow cross section.

In addition to the standard adjustment mechanism, additional devices can be installed in some modern RDV models:

pressure gauge;
coarse filter;
air subversive valve;
ball valve.

Video: Principle of operation of the gearbox

Types of water pressure reductors installed in water supply systems

The modern market offers the most diverse models of water and industrial water pressure regulators. Reductors lowering water pressure are divided into two types - piston and membrane.

Mechanical valves for water

Mechanical or piston water pressure gearboxes are the most common type of regulators. Popularity is caused by the lowest cost among such devices. Adjusting the pressure in the water supply system is carried out using a spring-loaded piston that changes the passage of the pipe. Water pressure regulators have a range of water pressure setting range - 1-5 atm.

The main disadvantage that the mechanical pressure regulator has the presence of moving parts that are subject to wear, leading to the conclusion of equipment. In addition, the piston reducer for water supply is very sensitive to various mechanical impurities in water, which are present in household and industrial highways.

Opinion expert

Ask a specialist

"It is for this reason that piston gearboxes are supplied with a coarse filter. The force of pressure at the entrance of the piston regulator of water pressure - 25 bar. "

Membrane water pressure gearboxes

I solve what better to buy pressure gearboxes - piston or membrane need to figure out that the second type devices are presented first. Regulators of this type perform their function by means of a membrane with a spring concluded in a hermetic chamber. With an increase in the pressure of the pressure in the water supply system, the spring compresses and the effect on the valve, which reduces the aqueous stream in the pipes, and with a decrease in the input, everything happens on the contrary.

The membrane water pressure regulator is a fairly reliable device, unpretentious in operation with a large pressure adjustment range in water supply lines. Also, these devices are distinguished by high cost. However, membrane gearboxes have such disadvantages as: a large number of moving elements and the complexity of the replacement procedure.

There are also regulators and flow-type, a distinctive feature of which is the absence of moving elements, which in turn positively affects the reliability and durability of gearboxes. Alignment of the pressure of the pressure is due to the loss of water flow rates due to the passage of the inner maze of the device. In everyday life, such regulators are used in almost all types of irrigation systems. The disadvantage of such devices is the need to include at the exit of an additional gearbox.

Also, the RDV shall be divided according to the control on electronic and automatic.

Automatic RDV in the water supply system

The modern market offers a large selection of automatic water pressure regulators installed in water supply systems. The adjustment of the water pressure in the pipeline is carried out by means of a special relay. The automatic gearbox is a pretty compact block with a membrane and two springs, the force of compression and straightening of which is adjustable by means of nuts. The membrane reacts to the inlet pressure of water, and with weak pressure, the spring weakens, and with the maximum - the compression becomes stronger. The impact rendered to the springs leads to opening (closure) of the contacts of the automatic water pressure regulator for pumps, running or stopping the pump.

The relay helps stabilize pressure in the water supply network and automate pump control.

Electronic pressure regulators

The special device monitors the current force of the head of the working medium by collecting the sensor data and water movement, after which the pump is activated (if necessary). Thanks to the electronic water pressure controller, the pumping equipment is protected from inclusion in the absence of fluid in a plumbing line.

Electronic water pressure regulators for pumps consist of the main housing, sensors, electronic boards, sleeves for connecting the electrocabyl and carvings for connecting to the water supply. The device is distinguished by silent operation. The electronic water pressure sensor in the water supply system also allows you to protect the equipment of the highway from the likely hydrowards.

Opinion expert

Designer engineer VK (water supply and sewage) LLC "ASP North-West"

Ask a specialist

"Electronic devices are installed until the first level of fluid fence. Before starting the gearbox, the pump capacitance is required to be filled with water. "

How is the installation of a water pressure reducer

In the requirements for water supply and sewage, it is indicated that the installation of water pressure regulators must be performed at the entrance immediately after the shut-off reinforcement to the accounting devices. With this location, the gearbox will protect all hydraulic equipment, including a water meter and filtering nodes.

How to propose in the apartment water pressure regulators

To stabilize the water pressure and eliminating interruptions in domestic water supply systems, the installation of a special gearbox is required. The apartment pressure regulator will also eliminate the possible breakdowns of equipment due to hydrowards. Most apartment owners have already felt the advantages of installing such regulatory devices.

Since in apartments, the water pressure reducer is installed to reduce the pressure in the highway, then it is worth it to the riser behind the accounting instrument and. It is desirable that the tap pipe is in a horizontal position, and the regulator itself is located between two stop valves. Reductors on water in apartments should be installed in a strictly vertical position (horizontal or inclined installation is invalid).

Installation of the RDV is practically no different from the installation of a water accounting device or a mesh filter. As a rule, the flow direction of the working medium is indicated by the arrow on the device housing, and the pressure gauge or the socket for its connection is always on top of the gearbox.

Before installing the regulator, it is necessary to overlap water primarily (it is desirable to warn the neighbors if the case affects the trunking pipe). If necessary, the input shut-off valve is established to which the mechanical cleaning filter will be attached. Be sure to install the ball valve on the RDV.

All locations of the connections need to be carefully properized. In order to avoid damage to the regulator, sealing works are desirable to carry out with the use of packle to reduce the likelihood of leakage.

Installing in the apartment reducers on water can be independently (in the presence of experience), but better installation to trust professionals.

On a note! The use of the RDV protects household hydrotechnical devices and a water supply system from hydrowards, breakdowns and emergencies.

Proper installation of RDV in private household

The RDV devices for a private house perform the same function as for apartment highways, with the only difference that there is a pump in the cottage plumbing systems. Water pressure regulators for mounted pressure gauge at the domestic network connection point to the pipeline (preferably behind the water meter). In addition, it is necessary to provide insert into a coarse filter system (if it was not done earlier), which is installed at the entrance to the home highway. In front of the water pressure regulators on the pumps and the locking valves are mounted.

After the device for stabilizing the pressure of the fluid, a direct section of the pipeline should be performed with a length of at least five working diameters. If there are minimal skills in the plumbing, you can install the water pressure regulator at the entrance to the house yourself, but to guarantee quality, the installation of the device is better entrusted with an experienced specialist.

I solve the question for yourself - to install the regulator to the counter or after, it is worth a watching video

Adjusting water pressure gearboxes in water supply systems

The most optimal is the force of pressure at the outlet at the level of 2-3.5 kg / cm 2. It is difficult to achieve this value, so it should be understood how to adjust the water pressure reducer.

Different types and models of gearboxes are different performance. In the case of leakage, the pressure is reduced by 1.5-1.2 atm. Depending on the current installation. A few seconds, the pressure increases, to the level below static. The ideal pressure at the outlet should be at least 1.5 kg / cm 2 less input, otherwise the movement of water in the pipeline will slow down. This must be taken into account by performing the water pressure adjustment in the apartment.

The poor operation of the gearbox can only be seen in the presence of paired pressure gauges or water intake arranged before the pressure regulator. Service of the RDV consists in flushing the built-in filter and washing the mechanism. In the event that this does not give results, it is in a mechanical malfunction or wear of parts. Visually determine the state of the regulator, if you remove the rod.

The adjustment of water pressure regulators must be performed during the operating system and the presence in it. Under these conditions, the parameters change immediately on the pressure gauge after unscrewing or twisting the adjusting screw. Without a manometer, the adjustment should not be done because you can confine the factory settings for the gearbox.

With the regulation of the RDV, you can familiarize yourself, viewing the video:

Overview of water pressure adjustment gearboxes in water supply systems

Maintaining normal pressure in the water supply system is very important for normal operation of hydraulic equipment. Foreign and domestic manufacturers of sanitary equipment offer a large selection of equipment for adjusting the head force of the working medium in water supply systems. Before you buy water pressure regulator, it is worth familiar with the most popular models and manufacturers.

Popular Models of Honeywell Water Pressure Reducers

Manufactured by the company Honeywell. Water pressure regulators are designed to protect water supply networks from a sudden increase in the system. At the output of the gearbox, the pressure is always in a given value, which reduces the cost of cold and hot water, and the device itself works quite silently. Honeywell products are popular on European, American and Asian markets and meets all international quality standards.

Model / Image	Description	Average cost, rub.
Honeywell DDS 76 1/2 "	The DDS 76 model is designed to monitor the filter cleaning process with the activation of the reverse wash actuator (Z11S-A, Z11AS, Z74A-A). The relay compares the values \u200b\u200bbefore and after the filter and during pressure, the automatic turning on the reverse flushing drive occurs. The chassis of the regulator is made of high quality plastic.	25100
Honeywell D06F-1/2 "B	The hot water regulator eliminates the creation of overpressure in the domestic water supply system and maintains a stable pressure on a given value. Adjusting the gearbox is performed by turning the adjusting handle, and the device itself has an installation scale. The model is equipped with a nozzle for installing a pressure gauge and compressed air, nitrogen or water can be used as a working medium. The device, if necessary, is easily transformed into a combined reverse flushing filter.	3200
Honeywell D06F-1/2 "A	This gearbox model in the standard version reduces the pressure of nitrogen, water and other non-aggressive working media flowing in pipelines and is used in household and industrial spheres. Installing the D06F-1 / 2A regulator will provide an ability to protect the pipeline and hardware connected to it. This device allows you to maintain a given output pressure, regardless of the jumps of the input pressure of the working media.	2950
Honeywell D06F-3/4 "B	The D06F-3/4 regulator model is designed to work with household and industrial hot water pipelines. The gearbox allows you to increase the durability of equipment included in the water supply system due to maintaining a constant force of the underpantus given by the consumer. The gearbox consists of a brass housing, a liner, cylinder, adjusting the springs of the scale, knobs of adjustment and a fine filter, located at the bottom.	4500
Honeywell D06F-3/4 "A	Honeywell D06F-3 / 4A allows you to protect the water supply system from overpressure, which can cause emergency situations and breakdowns of the connected equipment. The regulator is equipped with a manometer pipe, installation scale and adjusting handle. Cold water, nitrogen or compressed air is used as a working medium.	4116
Honeywell D04FS-3/4 "A	HONEYWELL D04FS-3/4 "A AR protect the equipment of the water supply system from overpressure, make it possible to avoid breakdowns due to hydrowards and reduce water consumption. The gearbox valve supports the predetermined force of the working medium at the output even when it is jumps at the entrance, which minimizes noise.	1880
Honeywell D04FS-1/2 "A	Model D04FS-1/2 "A Most Available and Easy in Honeywell Line. Easy to regulator, however, does not interfere with constantly maintaining the setpoint value at the output. The gearbox is possible to install a pressure gauge, and the adjusting spring is not in contact with water.	2090
Honeywell d 06f.	The Honeywell D 06F regulator model provides uninterrupted and comprehensive protection of the water supply system from pressure surges. The device is suitable for both industrial and production plants. Adjusting the pressure of the working medium in the pipeline is performed by a special handle with a scale of values.	4800

Honeywell D06F-1/2

Honeywell D04FS-1/2 A

Honeywell offers consumers only high-quality and highly efficient water pressure regulators prices that are completely justified.

Valtec water pressure regulators model range

Model / Image	Description	Average cost, rub.
Reducer with filter and pressure gauge Valtec vt.082 1/2 "	VT.082 pressure regulator. 1/2 "was designed to reduce the strength of the flow of cold and hot media at the inputs in domestic water supply networks. The pressure adjustment is performed according to the" after itself "principle. Model VT.082. 1/2" is equipped with a pressure gauge to perform a more accurate adjustment of the output pressure and allows Control water pressure. Setting the water flow strength at the outlet is easily carried out using a screwdriver, and each element of the gearbox can be promptly replaced or repaired. The installation of the regulator is recommended immediately after the input locking reinforcement in front of the water metering device.	1043
Reducer Membrane Valtec VT.085 1/2 "	The membrane regulator allows you to maintain a given level of pressure of liquids, gases and other non-aggressive agents in heating systems, water supply, in technological pipelines and anti-shots. The stability of the given pressure in the system is maintained in independence from sharp jumps in the main line. The absence of rubbing elements in the design makes membrane regulators less dependent on the purity of the working medium in contrast to the piston gearboxes and more reliable. The Valtec VT.085 1/2 Membrane is made of EPDM reinforced.	2198
Piston Reducer Valtec VT.087 1/2 "	The piston regulator Valtec VT.087 1/2 is designed to reduce the pressure of the pressure in highways in which compressed air, water, glycol and gases and gases are used as a working medium with a temperature of up to + 80˚C. At the output of the gearbox does not exceed the pressure The set value is regardless of the pressure drops. The adjustment is performed in the range of 1-4.5 bar. The device body and all of its parts are made of special high-quality brass, stainless steel springs, and seals from EPDM.	862

Domestic water pressure regulator RDV

Model / Image	Description	Average cost, rub.
Coupling regulator RDV15-2A-M. cold and hot water	The model of the stabilizing gearbox RDV 15-2A-M is used in various water supply systems for adjusting the fluid pressure to neutral value. The regulator 15-2A-M consists of a brass housing with spring-loaded piston, adjustment node and two nozzles. The RDV is used in the water supply systems of utilities and industry to reduce the pressure level to the required value. The stabilization gearbox allows you to significantly increase the reliability of the hydrotechnical devices installed after the pressure regulator from the hydrowards and extend their life.	1102
Coupling regulator RDV-2A-M cold and hot water	The coupling gearbox RDV-2A-M to adjust the pressure of the fluid pressure is intended for use in water supply systems of utilities and industrial facilities. Water is used as a working medium with a maximum temperature to + 70˚C. The body of the stabilizing regulator is made of brass.	974
Coupling regulator RDV-2-M cold and hot water	Reducer for stabilization of pressure of the RDV-2-M is designed for use in industrial and utility water supply systems. Due to the optimization of the flow strength of the working medium, a uniform distribution of the fluid is achieved between the long and near communications from the central highway, as well as between the floors of high-rise buildings. It also increases the reliability of the system and extends the life of the equipment. Water savings when the pressure regulator is turned on, up to 30% reaches a pressure regulator, and the power consumption of pumping installations is reduced.	700
Coupling regulator RDV-2A-F cold and hot water	The household pressure regulator of PDV-2A-F water is available in a solid brass body as a tee combined with a filter, which is made of stainless grid. The device allows you to stabilize and align the pressure in water supply systems with cold and hot liquid.	700

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