Repair kit for gas-type gas pressure regulators. Gas pressure regulators Gas pressure regulator RDG 50N Rod Length

Classification. Gas pressure regulators classify:for the purpose, the nature of the regulatory effect, the bonds between the input and output values, the method of exposure to the control valve.

By the nature of the regulatory impact, the regulators are divided into astatic and static (proportional). Schemes Regulators are shown in the figure below.

Pressure regulators circuit

aestatic: 1 - rod; 2 - membrane; 3 - loads; 4 - subable cavity; 5 - gas outlet; 6 - valve; b - static: 1 - rod; 2 - spring; 3 - membrane; 4 - subable cavity; 5 - pulse tube; 6 - gland; 7 - Valve.

IN astatic regulator membrane it has a piston form, and its active area that perceives the pressure of the gas is practically not changed at any positions of the regulating valve.. Therefore, if the gas pressure balances the gravity of the membrane, rod and valve, The membrane suspension corresponds to the state of the astatic (indifferent) equilibrium. The gas pressure control process will proceed as follows. Suppose that gas consumption through the regulator is equal to its influx and valveoccupies some kind of definite position. If the gas flow rate increases, the pressure will decreaseand they will lower the membrane device, which will lead to the additional opening of the regulating valve. After the recovery of equality between the influx and flow rate, the gas pressure will increase to a given value. If gas consumption decreases and increase the gas pressure, the regulatory process will occur in the opposite direction. Set the regulator to the required gas pressure using special cargo, Moreover, with an increase in their mass, the output pressure of the gas increases.

Astatic regulators after perturbation lead adjustable pressure To a given value, regardless of the load value and the position of the regulating valve. Equilibrium system is possible only with a given value of the adjustable parameter, while the control valve can occupy any position. Astatic regulators are often replaced by proportional.

In static (proportional) regulators, in contrast to the astatic, the subable cavity is separated from the collector to the bowel and connected to it with a pulse tube, that is, feedback nodes are located outside the object. Instead of cargo on the membrane, the power of the springs compression is.

In the astatic regulator, the slightest change in the output pressure of the gas can lead to the movement of the control valve from one extreme position to another, and in a static full movement of the valve occurs only with the corresponding springs compression.

Both as astatic and proportional regulators, when working with very narrow limits of proportionality, possess the properties of systems operating according to the principle "open - closed", that is, with a slight change in the gas parameter, the movement of the valve occurs instantly. To eliminate this phenomenon, install special chokes in the fitting connecting the working cavity of the membrane device with a gas pipeline or a candle. Installing chokes allows you to reduce the speed of the valve movement and achieve more stable operation of the regulator.

According to the method of exposure to the control valve, the regulators are direct and not direct action. In regulators direct action The control valve is under the action of the control parameter directly or through the dependent parameters and when the adjustable parameter change changes, the force arising in the sensitive element of the regulator is sufficient to permutate the control valve without an extraneous energy source.

In regulators indirect action The sensitive element affects the regulating valve by an extraneous energy source ( compressed air, water or electric current).

When the adjusting parameter changes, the force arising in the sensitive element of the regulator is activated by an auxiliary device that opens the energy access from an extraneous source into the mechanism moving the control valve.

Direct action pressure regulators are less sensitive than indirect control regulators. About simple design And the high reliability of the pressure regulators of direct action led to their widespread use in the gas economy.

Throttle devices Pressure regulators (drawing below) - valves of various designs. In gas pressure regulators, single-week and two-week valves are used. There is a unilateral effort to make a single-sided effort, equal to the product of the seat opening area on the pressure difference on both sides of the valve. The presence of efforts only on one side makes it difficult to regulate and at the same time increases the effect of pressure change to the regulator for output pressure. At the same time, these valves provide a reliable shutdown of gas in the absence of its selection, which led to their widespread use in the designs of the regulators used in GPP.

Gas pressure regulator throttles

a - Valve hard one-chained; b - Soft Single Valve; B is a cylindrical valve with a window for gas passage; r - Valve hard two-seated non-crossing with guide feathers; D - Soft two-seater valve

Two-week valves do not provide hermetic closure. This is due to the uneven wear of the saddles, the complexity of the writing of the shutter simultaneously to two saddles, as well as the fact that the temperature of the shutter and the saddle are changed at the temperature fluctuations.

From the size of the valve and the magnitude of its stroke depends the bandwidth of the regulator. Therefore, the regulators are selected depending on the maximum possible gas consumption, as well as the size of the valve and the magnitude of its stroke. The regulators installed in the hydraulic power plants should operate in the load range from 0 ("on a dead end") to a maximum.

The bandwidth of the regulator depends on the dance ratio before and after the regulator, the gas density and the final pressure. In the instructions and reference books there are tables bandwidth Regulators with pressure drop 0.01 MPa. To determine the bandwidth of the regulators, with other parameters, it is necessary to be recalculated.

Membranes. Using membranes, gas pressure energy is translated into mechanical energy Movement transmitted through the lever system on the valve. The selection of the membrane design depends on the purpose of pressure regulators. In astatic regulators constancy working surface The membranes are achieved by putting a piston form and the use of corrugated bending limiters.

Ring membranes (drawing below) found the greatest application in the designs of the regulators. Their use facilitated the replacement of membranes during repair work and allowed to unify the main measuring devices different species regulators.

Ring membrane

a - with one disk: 1 - disk; 2 - Corrugations; b - with two discs

The movement of the membrane device up and down occurs due to the deformation of the flat corrugation formed by the reference disk. If the membrane is in the extreme lower position, then the active area of \u200b\u200bthe membrane is its entire surface. If the membrane moves to the extreme upper position, then its active area decreases to the area of \u200b\u200bthe disk. With a decrease in the diameter of the disk, the difference between the maximum and minimum active area will increase. Consequently, for lifting ring membranes it is necessary to gradually increase the pressure, which compensate for the decrease in the active area of \u200b\u200bthe membrane. If the membrane during operation is subjected to alternate pressure on both sides, they put two disks - from above and below.

Regulators of low output pressure have one-sided gas pressure on the membrane with springs or cargo. Regulators of high or medium output pressure, the gas is supplied to both sides of the membrane, unloading it from one-sided effort.

Direct operation regulators are divided into pilot and unmanned. Pilot regulators (PCD, REDUK and RDV) have a control device in the form of a small regulator called a pilot.

Unmanned regulators (RD, RDK and RDG) do not have a control device and differ from pilot dimensions and bandwidth.

Direct operation gas pressure regulators. The RD-32M and RD-50M regulators are unmanned, direct action, differ in the conditional passage 32 and 50 mm and provide gas supply, respectively, up to 200 and 750 m 3 / h. The RD-32M regulator housing (figure below) is attached to the gas pipeline by the Cape nuts. According to the pulse tube, the reduced gas is supplied to the subable space of the regulator and puts pressure on the elastic membrane. Top on the membrane is reducing the spring. If the gas consumption increases, its pressure behind the regulator is reduced, the gas pressure in the sub-membrane regulator space will decrease accordingly, the membrane equilibrium will break down, and it will move down under the action of the spring. Due to the movement of the membrane, the lever mechanism will move the piston from the valve. The distance between the valve and the piston will increase, this will lead to an increase in the gas flow and the restoration of the final pressure. If the gas flow rate is reduced, the output pressure will increase, and the regulatory process will occur in the opposite direction. Replaceable valves allow you to change the bandwidth of the regulators. Customize regulators to a given pressure mode using an adjustable spring, nuts and adjusting screws.

Pressure regulator RD-32M

1 - membrane; 2 - adjustable spring; 3.5 - nuts; 4 - adjusting screw; 6 - plug; 7 - nipple; 8, 12 - valves; 9 - piston; 10 - a pulse tube of finite pressure; 11 - lever mechanism; 12 - safety valve

In the clock of minimum gas consumption, the output gas pressure can increase and cause the regulator membrane break. Protects the membrane from breaking a special device, a safety valve embedded in the central part of the membrane. The valve provides a gas discharge from the subable space into the atmosphere.

Combined regulators. The domestic industry produces several varieties of such regulators: RDNA- 400, RDHD-20, RDSK-50, RGD-80. These regulators received such a name because the discharge and cutting (shut-off) valves are mounted in the regulator housing. The figures below show the schemes of combined regulators.

RDNA-400 regulator. RDNA type regulators are produced in the RDNA-400 modifications, RDNA-400m, RDNA-1000 and RDNA-y.

RDNA-400 gas pressure regulator

1 - dumping valve; 2, 20 - nuts; 3 - Spring Settings upset valve; 4 - worker membrane; 5 - fitting; 6 - spring output pressure settings; 7 - adjusting screw; 8 - camera membrane; 9, 16 - springs; 10 - valve worker; 11, 13 - pulse tubes; 12 - nozzle; 14 - disconnecting device; 15 - a glass; 17 - Cutting valve; 18 - filter; 19 - Corps; 21, 22 - lever mechanism

The device and the principle of operation of the regulators are shown on the example of the RDNA-400 (figure above). Low output pressure regulator Combined consists of a pressure regulator itself and an automatic shutting down device. The regulator has an integrated pulse tube included in the subable cavity, and a pulse tube. The nozzle located in the chassis of the regulator is simultaneously the workshop of the working and shut-off valves. The working valve through the lever mechanism (rod and lever) is connected to the working membrane. Replaceable spring and adjusting screw are designed to adjust the output pressure of the gas.

The disconnecting device has a membrane connected to the actuator whose retainer holds the shut-off valve in the open position. Configuring the disconnecting device is carried out by replaceable springs located in a glass.

Gas Middle or high pressuresupplied to the regulator passes through the gap between the work valve and the sealer, reduced to low pressure And comes to consumers. The pulse from the output pressure on the pipeline comes from the output pipeline into the subable regulator cavity and on the disconnecting device. When the output pressure is raised over or lowering the parameters, the lock located in the disconnecting device, the plugging of the disconnect device, is output from the engagement, the valve overlaps the nozzle, and the flow of gas stops. Starting a regulator to work is done manually after eliminating the reasons that caused the shutdown device. The technical characteristics of the regulator are shown in the table below.

Specifications of the RDNA-400 regulator

The manufacturer supplies a regulator configured to the output pressure of 2 kPa, with the corresponding setting of reset and shut-off valves. The output pressure is regulated by rotating the screw. When rotating along a clockwise arrow, the output pressure increases, against - decreases. A reset valve is adjusted to the rotation of the nut, which weakens or compresses the spring.

RDSK-50 regulator. In the regulator with output media, an independently operating pressure regulator is arranged, an automatic shutdown device, a reset valve, a filter (figure below). The technical characteristics of the regulator are shown in the table below.

RDSK-50 gas pressure regulator

1 - Cutting valve; 2 - valve seat; 3 - body; 4, 20 - membrane; 5 - cover; 6 - nut; 7 - socket; 8, 12, 21, 22, 25, 30 - springs; 9, 23, 24 - guides; 10 - a glass; 11, 15, 26, 28 - stocks; 13 - dumping valve; 14 - discharge membrane; 16 - Saddle of the working hollow; 17 - valve worker; 18, 29 - Pulse tubes; 19 - pusher; 27 - plug; 31 - the chassis of the regulator; 32 - Mesh filter

The output pressure is adjusted to the rotation of the guide. When rotating along a clockwise arrow, the output pressure increases, against - decreases. Reset valve response pressure is regulated by the rotation of the nut.

The disconnecting device is adjusted, lowering the output pressure with a compression or a weakening of the spring, rotating the guide, as well as increasing the output pressure with a compression or attenuation of the spring, rotating the guide.

Starting the regulator After troubleshooting the triggering of the disconnect device, perform the plug by twist, as a result, the valve moves down until the rod under the action of the spring moves to the left and will be secured by the protrusion protrusion, while holding it in the open position. After that, the plug is screwed down to the stop.

Technical characteristics of the regulatorRDSK-50.

Maximum input pressure, MPa, no more
Output pressure settings, MPa
Bandwidth at input pressure 0.3 MPa, m 3 / h, no more
Oscillation of output pressure without adjustment of the regulator when changing the gas flow and oscillations of input pressure by ± 25%, MPa, no more
Upper limit setting the start pressure of the reset valve, MPa
Upper and lower limits for setting the pressure of the automatic shutdown device, MPa: with an increase in the output pressure, more than when the output pressure is reduced less
Conditional passage, mm: inlet nozzle outlet

The manufacturer supplies a regulator configured to the output pressure of 0.05 MPa, with the appropriate setting of the reset valve and the disconnecting device. When setting up the output pressure of the regulator, as well as the operation of the reset valve and the disconnecting device uses replaceable springs included in the package. The regulator is installed on the horizontal section of the gas pipeline.

Gas pressure regulator RDH-80 (Figure below). Combined regulators of the RDG series for district hydraulic PPPs are produced on conditional passages 50, 80, 100, 150 mm; They are deprived of a number of shortcomings inherent in other regulators.

RDG-80 regulator

1 - pressure regulator; 2 - pressure stabilizer; 3 - input crane; 4 - Cepping valve; 5 - working large valve; 6 - spring; 7 - working small valve; 8 - manometer; 9 - Impulse gas pipeline; 10 - swivel axis shut-off valve; 11 - swivel lever; 12 - mechanism for controlling the shut-off valve; 13 - throttle adjustable; 14 - Sichigasyman

Each type of regulators is designed to reduce high or medium gas pressure on medium or low, automatic maintenance Output pressure at a given level, regardless of changes in flow and input pressure, as well as to automatically disconnect the gas supply when an emergency increase and decrease the output pressure in excess of the given valid values.

Scope of RDG regulators - GPP and nodes of reduction of hydroelectric, utility and household objects. Regulators of this type - indirect action. The regulator includes: actuator, stabilizer, control regulator (pilot).

The RDH-80 regulator provides a steady and accurate gas pressure regulation from the minimum to maximum. This is achieved by the fact that the control valve of the actuator is made in the form of two spring-loaded valves of different diameters, providing control stability over the entire cost range, and in the control regulator (pilot), the working valve is located on a biscuit lever, the opposite end of which is spring-loaded; Specifying force on the lever is superimposed between the support of the lever and the spring. This ensures the tightness of the working valve and the control accuracy is proportional to the ratio of the arm of the lever.

The actuator consists of a hull within which a large saddle is installed. The membrane drive includes a membrane rigidly connected to her rod, at the end of which a small valve is fixed; Between the protrusion of the rod and small valve is freely located a large valve, a small valve seat is also fixed on the rod. Both valves are spring-loaded. The rod moves in the bushings of the housing guide column. Under the saddle is a sicochifier, made in the form of a nozzle with slit holes.

The stabilizer is designed to maintain constant pressure at the entrance to the control regulator, that is, to eliminate the influence of fluctuations in the input pressure on the operation of the regulator as a whole.

The stabilizer is made in the form of a direct action regulator and includes a housing, a membrane node with a spring load, a working valve that is located on a bubbling lever, the opposite end of which is spring. With this design, the tightness of the control regulator valve and stabilization of the output pressure are achieved.

The control regulator (pilot) changes the control pressure in the apprailed cavity of the actuator in order to rearrange the control valves of the actuator in the event of the regulation system mismatch.

The adhesive cavity of the control tube control control of the pulse tube through throttle devices is associated with the subable cavity of the actuator and with a discharge gas pipeline.

The subable cavity is connected by a pulsed tube with a grambed cavity of the actuator. Using the control screw of the membrane spring, the control regulator adjust the control valve to the specified output pressure.

Adjustable chokes from the subable cavity of the actuator and on a reset pulse tube are used to configure "to calm operation of the regulator. Adjustable choke includes a housing, a slot with a slot and a plug. The pressure gauge is used to control the pressure after the stabilizer.

The control mechanism consists of a detachable hull, membrane, a large and small springs, equalizing the impact on the output pressure pulse membrane.

The shut-off valve control mechanism provides continuous control of the output pressure and issuing a signal to the triggering of the shut-off valve in the actuator when an emergency increase and decrease the output pressure in excess of the specified values.

The bypass valve is designed to equilibrate the pressure in the inlet nozzle chambers before and after the shut-off valve when entering it into the working state.

The regulator works as follows. To start the regulator to work, it is necessary to open the bypass valve, the inlet pressure of the gas comes on the pulse tube into the administrative space of the actuator. Gas pressure to the shut-off valve and after it is aligned. Rotate the lever open the trim valve. The gas pressure through the seats of the shut-off valve enters the administrative space of the actuator and in the pulsed gas pipeline - into the linked space of the stabilizer. Under the action of spring and gas pressure valves of the actuator closed.

The springs of the stabilizer is configured to a given output gas pressure. The inlet pressure of the gas is reduced to a predetermined value, goes to the pre-flag space of the stabilizer, into the subable space of the stabilizer and the pulsed tube - into the sublined space of the pressure regulator (pilot). The compressive adjusting spring of the pilot affects the membrane, the membrane is lowered down, it acts through the plate on a rod, which moves the rocker. The pilot valve opens. From the control regulator (pilot) gas through an adjustable throttle enters the subable cavity of the actuator. Through the throttle, the subable cavity of the actuator is connected to the cavity of the gas pipeline behind the regulator. Gas pressure in the subable cavity of the actuator is greater than in the apparent one. The membrane with rigidly connected to it rod, at the end of which the small valve is fixed, will move and open the passage of gas through the resulting slot between the small valve control and the small saddle, which is directly installed in a large valve. At the same time, a large valve under the action of spring and input pressure is pressed to a large saddle, and therefore the gas consumption is determined by the cross section of the small valve.

Gas output pressure pulse lines (without chokes) enters the subable pressure regulator space (pilot), in the above-handed space of the actuator and the membrane of the shut-off valve control mechanism.

With an increase in the gas flow rate under the action of the pressure drop in the cavities in the cavities of the membrane, the membrane will come into further movement and the rod will begin to open a large valve and increase the gas passage through the additionally formed gap between the large valve seal and the large seal.

With a decrease in gas flow rate, a large valve under the action of spring and departure reverse side Under the action of a changed controlling pressure drop in the cavities of the executive device of the rod with protrusions, the passage cross section of a large valve will reduce and block a large saddle; In this case, the small valve remains open, and the regulator will start working in the mode of small loads. With a further decrease in the gas flow rate, the small valve under the action of the spring and the pressure dropper in the cavities of the actuator, along with the membrane, will come into further movement in the opposite direction and reduce the passage of the gas, and in the absence of gas flow, the small valve will block the saddle.

In the event of emergency increments or decreases of the output pressure of the membrane of the control mechanism moves to the left or right, the shut-off valve rod comes out of contact with the stock of the control mechanism, the valve under the action of the spring overlaps the gas inlet to the regulator.

Gas pressure regulator Kazantsev (Rnuk). The domestic industry produces these regulators with a conditional passage of 50, 100 and 200 mm. Rainch characteristics are shown in the table below.

Characteristics of regulators of Rnuk

Capacity with pressure drop 10 PA LLC and density 1 kg / m, m 3 / h	Diameter, mm.	Pressure, MPa
	conditional	maximum entrance	finite

Reduk-2 regulator

a - regulator in the context; b - pilot regulator; B - regulator strapping scheme; 1, 3, 12, 13, 14 - pulse tubes; 2 - control regulator (pilot); 3 - body; 5 - valve; 6 - column; 7 - valve stem; 8 - membrane; 9 - support; 10 - choke; 11 - fitting; 15 - fitting with the pusher; 16, 23 - springs; 17 - plug; 18 - Saddle of the pilot valve; 19 - Nut; 20 - Case cover; 21 - Pilot Case; 22 - a threaded glass; 24 - Disc

Rain-2 controller (see Figure above) consists of the following elements: control valve with membrane drive (actuator); control regulator (pilot); Chokes and connecting tubes. The initial pressure gas before entering the control regulator passes through the filter, which improves the working conditions of the pilot.

The membrane of the pressure regulator is clamped between the housing and the lid of the membrane box, and in the center - between the flat and the cup-shaped disk. The cup-shaped disk rests on the cover of the cover, which ensures the centering of the membrane before it is clip.

In the middle of the nest of the membrane, the pusher rests on, and the rod puts on it, which fluently moves in the column . Spool valve spool free on the upper end of the rod. The dense closure of the valve seat is provided by the mass of the spool and gas pressure on it.

The gas coming out of the pilot, the pulse tube enters the regulator membrane and partially on the tube is reset to the output gas pipeline. To limit this discharge, a throttle with a diameter of 2 mm with a gas pipeline is set to a pipeline with a gas pipeline, due to which the obtained gas pressure under the membrane of the regulator is achieved with a slight gas flow through the pilot. The pulse tube connects the resumborate cavity of the regulator with the output gas pipeline. The oxide cavity of the pilot, separated from its outlet fitting, is also reported to the output gas pipeline through the pulse tube. If the gas pressure on both sides of the regulator membrane is equally, the valve of the regulator is closed. The valve can only be opened if the gas pressure under the membrane is sufficient to overcome the gas pressure on the valve from above and overcoming the gravity of the heaviness of the membrane suspension.

The regulator works as follows. Primary pressure gas from the tank chamber of the regulator enters the pilot. Passing the pilot valve, the gas moves along the pulse tube, passes through the throttle and enters the gas pipeline after the regulating valve.

Pilot valve, choke and pulse tubes are an amplifying device of throttle type.

The pulse of the final pressure perceived by the pilot is amplified by the throttle device, is transformed into command pressure and on the tube is transmitted to the subable space of the actuator, moving the control valve.

When the gas flow rate decreases, the pressure after the regulator begins to increase. This is transmitted by a pulsed tube on the pilot membrane, which goes down, closing the pilot valve. In this case, the high side of the pulsed tube cannot go through the pilot. Therefore, its pressure under the membrane of the regulator is gradually decreasing. When the pressure under the membrane turns out less power The severity of the plate and pressure rendered by the valve of the regulator, as well as the gas pressure on the valve on top, then the membrane will go down, displacing gas from under the membrane cavity through the pulse tube to reset. The valve gradually begins to close, reducing the opening for the passage of the gas. The pressure after the regulator drops to a given value.

With increasing gas flow rate after the regulator decreases. The pressure is transmitted by a pulsed tube on the pilot membrane. The pilot membrane under the action of the spring goes up, opening the pilot valve. The heat from the high side of the pulse tube enters the pilot valve and then the pulse tube goes under the regulator membrane. Part of the gas goes to reset over the pulse tube, and the part is under the membrane. The gas pressure under the membrane of the regulator increases and, overcoming the mass of the membrane suspension and gas pressure on the valve, moves the membrane up. The valve of the regulator is opened, increasing the opening for the passage of the gas. Gas pressure after the regulator rises to a given value.

With increasing gas pressure in front of the regulator, it reacts in the same way as in the first case. When the gas pressure decreases in front of the regulator, it triggers the same way as in the second case.

Specifications of RDH-80-H (B)

	RDH-80-H (B)
Adjustable environment	natural gas According to GOST 5542-87
Maximum input pressure, MPa	0,1-1,2
Output pressure settings, MPa	0,001-0,06(0,06-0,6)
Gas bandwidth with ρ \u003d 0.73 kg / m³, m³ / h: R oh \u003d 0.1 MPa (Sp. H) and R Vx \u003d 0.16 MPa (IP. B)	2200
Diameter of the seat of the working valve, mm:
big	80
small	30
Regulation unevenness,%	± 10.
Limit of the pressure setting of the operation of the automatic disconnecting device, MPa:
when lowering the output pressure	0,0003-0,0030...0,01-0,03
when improving output pressure	0,003-0,070...0,07-0,7
Connecting dimensions, mm:
D at the inlet nozzle	80
D near the outlet	80
Compound	flange according to GOST 12820
Overall dimensions, mm	575 × 585 × 580
Mass, kg.	105

Device and principle of operation of RDG-80-H (B)

The actuator (see Figure) with small 7 and large 8 adjusting valves, shut-off valve 4 and the sicochifier 13 is intended by changing the passing sections of small and large regulating valves to automatically maintain the specified output pressure on all gas flow modes, including zero, and turn off the gas supply In case of an emergency increase or lower output pressure. The actuator consists of a cast housing 3, inside of which a large saddle is installed 5. Changeable valve seat. A membrane drive is mounted on the bottom of the case. In the central socket of the membrane 12, the pusher 11 rests on, and in it the rod 10, transmitting the vertical movement of the membrane plate 19, at the end of which a small control valve 7 is rigidly fixed. The rod 10 moves in the bushings of the hull guide column. Between the protrusion and the small valve sits freely on the rod, a large control valve 8, in which the saddle of the small valve 7 is located. Both valves are spring-loaded.

Under the large seat 5 there is a snitch in the form of a glass with slit holes.

Stabilizer 1 is designed (performed by "H") to maintain constant pressure at the entrance to the control regulator, i.e., to eliminate the effect of fluctuations in the output pressure on the operation of the regulator as a whole. The stabilizer is made in the form of a direct action regulator and includes: body, membrane assembly, head, pusher, a valve with a spring, a saddle, a glass, and a spring for adjusting the stabilizer to a given pressure before entering the control knob. Pressure on the pressure gauge after the stabilizer must be at least 0.2 MPa (to ensure a stable flow).

Stabilizer 1 (for the execution of "B") supports constant pressure behind the regulator by maintaining constant pressure in the subable cavity of the actuator. The stabilizer is made in the form of a direct action regulator. In the stabilizer, in contrast to the control regulator, the sample cavity is not connected to the end-rope of the actuator, and a more rigid spring is installed to configure the regulator. With the help of the adjusting cup, the regulator is configured to a specified output pressure.

The pressure regulator 20 produces control pressure in the subable cavity of the actuator in order to reinstall the control valves of the regulation system. The control regulator includes the following parts and nodes: housing, head, node, membrane; Pusher, valve with spring, saddle, glass and spring for adjusting the regulator to a given output pressure. Using the control glass of the controller (for execution "H"), the pressure regulator is set to the specified output pressure.

Adjustable chokes 17, 18 from the subable cavity of the actuator and on a reset pulse tube are used to configure the regulator on a calm (without oscillations). Adjustable choke includes: housing, needle with a slot and a plug.

Pressure gauge is designed to control pressure in front of the control regulator.

The control valve control mechanism 2 is designed for continuous control of the output pressure and issuing a signal on the triggering valve in the actuator when an emergency increase and decrease the output pressure over the valid specified values. The control mechanism consists of a detachable hull, membrane, rod, large and small springs that balance the effect on the output pressure pulse membrane.

Filter 9 is designed to clean the gas supplying the stabilizer, from mechanical impurities

The regulator works as follows.

The input pressure gas enters through the filter to the stabilizer 1, then to the control regulator 20 (for the execution of "H"). From the control regulator (for the execution of "H" or the stabilizer (for the execution of "in"), gas through the adjustable choke 18 enters the subable cavity and through the adjustable choke 17 to the subable cavity of the actuator. Through the throttle washer 21, the above-handed cavity of the actuator is connected by a pulsed tube 14 with a gas pipeline for a regulator. Due to the continuous gas flow through choke 18, the pressure in front of it, and therefore, and the subable cavity of the actuator will always be larger than the output pressure. The above-handing cavity of the actuator is under the influence of the output pressure. The pressure regulator (for the execution "H") or the stabilizer (for execution "in") supports constant pressure, so the pressure in the subable cavity will also be permanent (in the steady mode). Any deviations of the output pressure from the predetermined cause changes in the pressure in the above-handed cavity of the actuator, which leads to the movement of the control valve into a new equilibrium state corresponding to the new input pressure and consumption values, and the output pressure is restored. In the absence of gas consumption, small 7 and large 8 control valves are closed, which is determined by the action of springs 6 and the absence of a pressure dropper in the appropriate and subable cavities of the actuator and the action of the output pressure. In the presence of minimal gas consumption, the pressure dropper in the appliant and subable cavities of the actuator, as a result of which the membrane 12 will be in motion under the action of the resulting lifting force. Through the pusher 11 and the rod 10, the membrane movement is transmitted to the rod 19, at the end of which the small valve 7 is rigidly fixed, as a result of which the gas pass through the resulting gap between the small valve seal and the small seal, which is directly installed in the large valve 8. In this case, the valve Under the action of spring 6 and input pressure pressed to a large saddle, so the flow rate is determined by the cross section of the small valve. With a further increase in the gas flow under the action of the pressure drop in the indicated cavities of the membrane, the membrane 12 will come into further movement and the rod will begin to open a large valve and increase the gas passage through the additionally formed gap between the valve seal 8 and the large seal 5. When the gas flow rate is reduced by a large valve 8 under the action of a spring and exhausting in the opposite direction under the action of a changed control of the pressure in the cavities of the Executive Device of the Stem 19 with protrusions to reduce the passage section of the large valve and will further block a large saddle 5. The regulator will start working in small load modes.

With a further decrease in the gas flow rate, the small valve 7 under the action of the spring 6 and the modified control switching drop in the cavities of the actuator, together with the membrane 12, will come to further move in the opposite direction and reduce gas consumption.

In the absence of gas flow, the small valve 7 will block a small saddle. In the event of an emergency increase and lowering the output pressure of the membrane of the control mechanism 2 moves to the left and right, the flap of the shut-off valve 4 comes out of the contact with the rod 16, the shut-off valve under the action of the spring 15 will block the gas consumption by the regulator.

1 - stabilizer; 2 - control mechanism; 3 - enclosure case; 4 - shut-off valve; 5 - big saddle; 6 - springs of small and large regulating valves; 7, 8 - a small valve and large regulating; 9 - filter; 10 - terminal of the actuator; 11 - pusher; 12 - membrane of the executive device; 13 - sicochifier; 14 - tube impulse output gas pipeline; 15 - Spring of the shut-off valve; 16 - stock control mechanism; 17, 18 - throttles regulating; 19 - rod; 20 - controller; 21 - Throttle washer

Throttle Sadmambled RDH
Throttle Submembered RDH
Cut-off RDH valve
PDG pilot valve
Valve Working RDH
Valve Stabilizer RDH
Ring Sealing RDG
Membrane of the RDG Control Mechanism
Membrane pilot RDH
Membrane Working RDG
Membrane Stabilizer RDH
Spring valve shut-off RDG
Spring Valve Pilot RDG
Spring mechanism of control Big RDG
Spring pilot RDH
Spring Stabilizer RDH
Spring mechanism of control Small RDG
Saddle of the pilot RDH
Saddle regulator RDH
Cut-off RDG valve seal
Filter regulator RDH
Valve valve working RDG
Rdg control mechanism
Pilot RDH
Stabilizer RDH

Above, we listed the main details, which during the operation of the regulator may fail. Currently, in a crisis, it is often easier to repair a working regulator than to buy a new one. Of course, it is not always cost-effective, but often this is a real output, which is economical for money, but rather labor. Immediately make a reservation that repair of the RDG-50 regulator It should be performed only by specially trained personnel having admission to this kind Work! Savings in this case can lead to sad consequences, ranging from a serious breakdown of the regulator, before accidents with human victims.
RDH-50N Without special efforts, you can find in many organizations dealing with gas equipment. But it should be noted that not everyone understands the subtleties of the reducer of the gearbox and in the differences of the main nodes. If you decide remkomplekt RDH-50N OrderIn the first place, it should be clarified by the manufacturer of this product and preferably a year of its production. The fact is that it can be said that the regulators of different manufacturers do not differ practically, but the composite parts may have significant differences. As for RTI, then, for example, membrane Working RDG-50 Everyone has the same. The only thing they may differ from this material.

Some manufacturers make membrane membranes, and some make them licenses. The same applies pDH-50 pilot membrane and membrane Stabilizer RDH-50. But the pilot membranes are not so simple. There are several paintings of pilots. The round membrane of the PDH-50 pilot membrane and the pilot square membrane differ not only by the shape, but also the size. It is worth paying attention to the throttle.

PDG-50 choke may have various design. There was a case when the customer provided the name of the plant, but did not specify the year of production. When spare parts for RDH-50 Were it turned out that chokes are not suitable. They had experimental regulators, spare parts for which no one had long done. Saddle RDH-50 Rarely someone is different, but still there are different. When ordering the saddle, as well as valve RDH-50, It is necessary to specify the diameter.
Not little an important aspect When choosing spare parts is the material from which they

yes, and the production process itself also imposes an imprint on the quality of the details. For example, if pDH-50 valve seal It will not be pressed in high quality, then such a valve will work not long and will have to repair it again.
Manufacturers are constantly working on the design of their regulators. This is due to the desire to reduce the cost, as well as improve the quality and accuracy of work. Technical specialists are developing new designs and this leads to changes in the internal parts of the regulators.
Regulators of the RDH-50, RDH-80 and RDH-150 have a similar design and the difference between the remklects consists in the size of the parts. For instance membrane Working RDG-150 much more than what membrane Working RDG-80. There are also cases with workers' valves. Due to the difference in passing diameters and accordingly throughput valve Working RDH-150 more than valve worker RDH-80, and that in turn more than the valve worker RDH-50. Such nodes as a pilot and stabilizer from one manufacturer do not differ from the regulators with different diameter. There are no high regulators in the design of the stabilizer, so the cost of the repair kit will be lower. W. remkomplekt RDH-150 Price The highest among three modifications, remkomplekt RDH-80 Price Intermediate and, accordingly, the RDH-50 price Repair Kit is the lowest.

We provide the opportunity remkomplekt RDH buywith delivery in Serpukhov, Odintsovo, Krasnogorsk, Khimki, Balashikha, Domodedovo, Lyubertsy, Podolsk, Chekhov, Stupino, Ramenskoye, Queen, Pushkin, Noginsk, Tambov, Almaty, Atyrau, Aktau, Moscow, Novosibirsk, Nizhny Novgorod, Omsk, Tomsk, Yaroslavl, Petrozavodsk, Kazan, Aktobe, Karaganda, Ulan-Ude, Vladivostok, Khabarovsk, Penza, Kaluga, Volgograd, Chelyabinsk, Yekaterinburg, Ivanovo, Kstovo, Cheboksary, Ryazan, Dzerzhinsk, Rostov-on-Don, Perf, St. Petersburg, Kursk, Tula, Tver, Samara, Voronezh, Naberezhnye Chelny, Tyumen, Gatchina, Vladimir, Veliky Novgorod, Krasnoyarsk, Volzhsky, Belgorod, Rybinsk, Barnaul, Smolensk, Samara, Shchekino, Kemerovo, Orenburg, Surgut, Khasavych, Makhachkala, Grozny, Caspian, Ufa, Miass, Krasnodar, Stavropol, Tolyatti, Stary Oskol, Sterlitamak, Ishimbay, Rudny, Bryansk, Kostanaj, Uralsk Sochi, Novokuznetsk, Astana, Amursk, Angarsk, Norilsk, Nizhnekamsk, Elista, Biysk, Murmansk, Vladikavkaz, Khanty-Mansiysk, Nalchik, Orel, Kalining Rada, Yoshkar-Ola. To do this, you need to contact us by any way convenient for you.

Gas pressure regulator RDH-50N, RDH-50B It is a device that lowers the gas pressure from high and medium values \u200b\u200bto a certain level. Reducer refers to gearboxes after themselves. The pressure value configured by the consumer is maintained automatically. To prevent emergency situations arising due to sharp growth or drop pressure, a blocking device is provided in the regulator. It is allowed to operate the device at ambient temperature from -40 to +60 o C. Normal reducer operation at low temperatures It will be provided under conditions under which the relative humidity of the gas passing through the gearbox is less than 1. Under such conditions, the formation of condensation is excluded.

Specifications of RDH-50N, RDH-50B

Name of parameter	RDH-50N	RDH-50V.
Workspace	Natural gas according to GOST 5542-87
Maximum inlet pressure, MPa	1,2
Saddle diameter, mm	25,35,40,42,45
Output pressure setting range, kPa	160	30-600
Range of tuning of the disconnecting device, kpa - when lowering the output pressure, with an increase in the output pressure	0,3-31,4-12	3-3037,5-160
Accuracy of the disabled device,%, no more	± 5.
Corps material	Aluminum AK7CH GOST 1583-93
Building length, mm	365 ± 2.
The diameter of the conditional passage / output, mm	50/50
Overall dimensions, mm, no more-length-height-width	430482503	430405509
Mass, kg, no more	28	26

Installation of the RDG-50N regulator, RDH-50B

The gearbox is mounted on a horizontal pipeline membrane camera down. The pulse pipeline to the regulator from the output gas pipeline must be a diameter of at least 20mm. The pulse pipeline to the control mechanism from the output gas pipeline should be with a diameter of the conditional passage at least 15mm.

For periodic check The operation of the disconnecting device on the pulse pipeline to the control mechanism, it is necessary to provide a fitting for supplying pressure and a pressure gauge. When the pulse pipelines in the gas pipeline in the gas pipeline should be drilled, and not to cut through the welding torch, to avoid the spills of the metal on the wall, which can lead to distortion of the pressure pulse of the pressure.

Pluna samples controlled pressure There must be on the direct portion of the main gas pipeline going beyond the expansion, at a distance of 5 ... 10 diameters of the gas pipeline. Pulse samples should be located at the top of the pipeline.

A pressure gauge is placed in front of the gearbox to measure the input pressure. The pressure gauge for measuring output pressure is installed at the upper point of the gas pipeline in the immediate vicinity of the seats of pulse selection. The tightness of the actuator, the stabilizer, control regulator, the control mechanism is checked by a test launch of the regulator. At the same time, the maximum input and output pressure for the test gearbox is configured, and the tightness is determined by the help of a soap solution. Testing the regulator water is prohibited! The gearbox is pressed by pressure not exceeding the pressure in the passport.

IN standard equipment Remkomplekt RDH-50N (B) is absent. Upon additional order, the gearbox is completed with all the necessary piles, the composition of which determines the customer itself.

Possible labeling:

RDG-50N / 25

RDG-50N / 30

RDG-50N / 35

RDG-50N / 40

RDG-50N / 45

Control capacity of the RDH-50N (B) regulator.

RVH. MPa	RDH-50N (saddle 30mm)	RDH-50B (saddle 30mm)	RDH-50N (Saddle 35mm)	RDG-50B (Saddle 35mm)	RDH-50N (seat 40mm)	RDG-50B (seat 40mm)	RDG-50N (seat 45mm)	RDH-50B (seat 45mm)

To find out the price, specifications, Passport RDH-50 You have enough to contact our managers.