Solenoid valves C E M. Electromagnetic valves CeME. Solenoid valves running

Valve solenoid seed of pilot action 2/2 running normally closed D25 G1 NBR ~ 1x230V 50Hz Art. 8556NN025S CeME.

Art. 8556NN250SA57

Classification.


Provisions:
- 2- Open - closed.




Operating principle:


Important parameters.


Characteristics:
Model: 8556nn020s D25 G1 NBR ~ 1x230V 50Hz.


Type: normally closed.






Pipes in / out: 1 ".
Bandwidth characteristic KV: 9.6 m3 / h.

Weight:
Materials:
- Case: Bronze.

Valve solenoid seed of pilot action 2/2 running normally closed D20 G3 / 4 NBR ~ 1x230V 50Hz Art. 8555Nn020s CeME.

Art. 8555NN200SA57.

Ceme solenoid valves (Italy) are used in the networks of water and heat supply, different industries Industry, in water treatment and air conditioning systems, in fountain installations.
The solenoid valves are installed on pipelines in almost any position (coil down - an undesirable version) and, depending on the execution, (normal-closed or normally open) open or overlap the flow of the working medium when the supply voltage valve is admitted to the coil.
As a control sensor that feeds the signal to open or closer the power supply chain of the valve coil, a pressure switch, a float switch, various kinds of level control devices, a duct relay, a thermostat, and similar products can be used.
Classification.
By the number of moves (channels connecting various contours):
- 2 running - 2 /: one input, one output.
- 3 running -3 /: one input, one output and one air duct channel, or three strokes in various combinations.
Provisions:
- 2- Open - closed.
- adjustable position, some models.
Working conditions. This parameter indicates in the open (with the passage of the working medium) or closed (without passing the working environment) the valve is the valve most of the time.
- N.c. Normally closed: The valve is closed when the power supply voltage is missing on the cable terminals.
- N.O. Normally open: on the contrary, with the above-mentioned conditions, the valve is open.
Operating principle:
Depending on the magnitude of the minimum cut pressure (equal to zero or greater than zero), the valves come directly or with a servo.
- Direct action: The passage for the working environment opens or closes using a sealing part mounted directly on the plunger with an electromagnet, which is controlled by the coil. Operating pressure directly depends on the diameter of the hole and the power of the coil; In this case, the minimum working pressure is zero.
- with a servo: there are control and main hole, the electromagnetic device opens and closes only the control hole, so the maximum and minimum working pressure dependely depend on the coil power, but only from constructive features Sealing devices of the main hole (diaphragm, piston, etc.). For this type of valve, the main characteristic is the minimum working pressure, which is always not zero and more zero.
Important parameters.
Maximum pressure dropper (M.R.P.D.), maximum pressure drop between the input and output of the valve, in which the solenoid can safely work. If the outlet pressure is unknown, for the magnitude of M.R.P.D. The input pressure is accepted.
The minimum pressure drop drops is the pressure required to open (closing the valve and hold it in an open (closed) position.
Characteristics:
Model: 8555NN020S D20 G3 / 4 NBR ~ 1x230V 50Hz.
Principle of operation: with servo.
Number of moves: 2-chassis.
Type: normally closed.
Working environment: Air, water, light oils.
Installation position: any; The position at which the coil is downstairs is not recommended.
Minimum pressure dropper: 0.25 bar.
Maximum operating pressure drop (M.R.P.D.): 10 bar.
Temperature ambient: 80 ° C; in devices direct current at temperatures above 40 ° C, performance features (Mr.p.d.) can decrease.
Maximum temperature of the work environment: 90 ° C
Pipes input / output: 3/4 ".
Bandwidth characteristic KV: 5.7 m3 / h.
Power supply coil: ~ 1x230V 50Hz.
Weight:
Materials:
- Case: Bronze.
- Seal: NBR, on request EPDM-FPM.
- guide rod: stainless steel (It has a metallic seal with the valve body for operation at high temperatures).
- Internal details: stainless steel.

Solenoid seed valve normally closed D15 G1 / 2 NBR ~ 1x230V 50HZ pilot action 2/2 Chassis Art. 8554NN012S CeME.

Art. 8554NN120SA57

Ceme solenoid valves (Italy) are used in water and heat supply networks, in various industries, in water treatment and air conditioning systems, in fountain installations.
The solenoid valves are installed on pipelines in almost any position (coil down - an undesirable version) and, depending on the execution, (normal-closed or normally open) open or overlap the flow of the working medium when the supply voltage valve is admitted to the coil.
As a control sensor that feeds the signal to open or closer the power supply chain of the valve coil, a pressure switch, a float switch, various kinds of level control devices, a duct relay, a thermostat, and similar products can be used.
Classification.
By the number of moves (channels connecting various contours):
- 2 running - 2 /: one input, one output.
- 3 running -3 /: one input, one output and one air duct channel, or three strokes in various combinations.
Provisions:
- 2- Open - closed.
- adjustable position, some models.
Working conditions. This parameter indicates in the open (with the passage of the working medium) or closed (without passing the working environment) the valve is the valve most of the time.
- N.c. Normally closed: The valve is closed when the power supply voltage is missing on the cable terminals.
- N.O. Normally open: on the contrary, with the above-mentioned conditions, the valve is open.
Operating principle:
Depending on the magnitude of the minimum cut pressure (equal to zero or greater than zero), the valves come directly or with a servo.
- Direct effect: The passage for the working environment opens or closes using a sealing part mounted directly on the plunger with an electromagnet, which is controlled by the coil. Operating pressure directly depends on the diameter of the hole and the power of the coil; In this case, the minimum working pressure is zero.
- with a servo: There are control and main holes, the electromagnetic device opens and closes only the control hole, so the maximum and minimum working pressure dependes not on the power of the coil, but only from the structural features of the sealing device of the main opening (diaphragm, piston, etc.) . For this type of valve, the main characteristic is the minimum working pressure, which is always not zero and more zero.
Important parameters.
Maximum pressure dropper (M.R.P.D.), maximum pressure drop between the input and output of the valve, in which the solenoid can safely work. If the outlet pressure is unknown, for the magnitude of M.R.P.D. The input pressure is accepted.
The minimum pressure drop drops is the pressure required to open (closing the valve and hold it in an open (closed) position.
Characteristics:
Model: 8554NN012S 15 G1 / 2 NBR ~ 1x230V 50Hz.
Principle of operation: with servo.
Number of moves: 2-chassis.
Type: normally closed.
Working environment: Air, water, light oils.
Installation position: any; The position at which the coil is downstairs is not recommended.
Minimum pressure dropper: 0.25 bar.
Maximum operating pressure drop (M.R.P.D.): 10 bar.
Environmental temperature: 80 ° C; In DC devices at temperatures above 40 ° C, operational characteristics (mr.p.d.) may decrease.
Maximum temperature of the work environment: 90 ° C
Pipes input / output: 1/2 ".
Bandwidth characteristic KV: 2.1 m3 / h.
Power supply coil: ~ 1x230V 50Hz.
Weight: 0,400 kg
Materials:
- Case: Bronze.
- Seal: NBR, on request EPDM-FPM.
- guide rod: stainless steel (has a metal seal with valve body for working at high temperatures).
- Internal details: stainless steel.

Solenoid valve D25 G1 "NBR ~ 1x230V 50Hz 2/2 running normally closed art. 8416NN025S C57 CeME

Art. 8416NN250SC57

Ceme solenoid valves (Italy) are used in water and heat supply networks, in various industries, in water treatment and air conditioning systems, in fountain installations.
The solenoid valves are installed on pipelines in almost any position (coil down - an undesirable version) and, depending on the execution, (normal-closed or normally open) open or overlap the flow of the working medium when the supply voltage valve is admitted to the coil.
As a control sensor that feeds the signal to open or closer the power supply chain of the valve coil, a pressure switch, a float switch, various kinds of level control devices, a duct relay, a thermostat, and similar products can be used.
Classification.
By the number of moves (channels connecting various contours):
- 2 running - 2 /: one input, one output.
- 3 running -3 /: one input, one output and one air duct channel, or three strokes in various combinations.
Provisions:
- 2- Open - closed.
- adjustable position, some models.
Working conditions. This parameter indicates in the open (with the passage of the working medium) or closed (without passing the working environment) the valve is the valve most of the time.
- N.c. Normally closed: The valve is closed when the power supply voltage is missing on the cable terminals.
- N.O. Normally open: on the contrary, with the above-mentioned conditions, the valve is open.
Operating principle:
Depending on the magnitude of the minimum cut pressure (equal to zero or greater than zero), the valves come directly or with a servo.
- Direct effect: The passage for the working environment opens or closes using a sealing part mounted directly on the plunger with an electromagnet, which is controlled by the coil. Operating pressure directly depends on the diameter of the hole and the power of the coil; In this case, the minimum working pressure is zero.
- with a servo: There are control and main holes, the electromagnetic device opens and closes only the control hole, so the maximum and minimum working pressure dependes not on the power of the coil, but only from the structural features of the sealing device of the main opening (diaphragm, piston, etc.) . For this type of valve, the main characteristic is the minimum working pressure, which is always not zero and more zero.
Important parameters.
Maximum pressure dropper (M.R.P.D.), maximum pressure drop between the input and output of the valve, in which the solenoid can safely work. If the outlet pressure is unknown, for the magnitude of M.R.P.D. The input pressure is accepted.
The minimum pressure drop drops is the pressure required to open (closing the valve and hold it in an open (closed) position.
Characteristics:
Model: 8416Nn025S C57 D25 G1 NBR ~ 1x230V 50HZ
Principle of operation: with servo.
Number of moves: 2-chassis.
Type: normally closed.
Working environment: Air, water, light oils.



Environmental temperature: 80 ° C; In DC devices at temperatures above 40 ° C, operational characteristics (mr.p.d.) may decrease.
Maximum temperature of the work environment: 90 ° C
Pipes in / out: 1 ".
KV bandwidth: 7.50 m3 / h.
Power supply coil: ~ 1x230V 50Hz.
Weight:
Materials:
- Case: Bronze.
- Seal: NBR, on request EPDM-FPM.
- guide rod: stainless steel (has a metal seal with valve body for working at high temperatures).
- Internal details: stainless steel.

Solenoid valve D20 G3 / 4 "NBR ~ 1x230V 50Hz 2/2 running normally closed art. 8415NN020S C57 CeME

Art. 8415NN200SC57.

Ceme solenoid valves (Italy) are used in water and heat supply networks, in various industries, in water treatment and air conditioning systems, in fountain installations.
The solenoid valves are installed on pipelines in almost any position (coil down - an undesirable version) and, depending on the execution, (normal-closed or normally open) open or overlap the flow of the working medium when the supply voltage valve is admitted to the coil.
As a control sensor that feeds the signal to open or closer the power supply chain of the valve coil, a pressure switch, a float switch, various kinds of level control devices, a duct relay, a thermostat, and similar products can be used.
Classification.
By the number of moves (channels connecting various contours):
- 2 running - 2 /: one input, one output.
- 3 running -3 /: one input, one output and one air duct channel, or three strokes in various combinations.
Provisions:
- 2- Open - closed.
- adjustable position, some models.
Working conditions. This parameter indicates in the open (with the passage of the working medium) or closed (without passing the working environment) the valve is the valve most of the time.
- N.c. Normally closed: The valve is closed when the power supply voltage is missing on the cable terminals.
- N.O. Normally open: on the contrary, with the above-mentioned conditions, the valve is open.
Operating principle:
Depending on the magnitude of the minimum cut pressure (equal to zero or greater than zero), the valves come directly or with a servo.
- Direct effect: The passage for the working environment opens or closes using a sealing part mounted directly on the plunger with an electromagnet, which is controlled by the coil. Operating pressure directly depends on the diameter of the hole and the power of the coil; In this case, the minimum working pressure is zero.
- with a servo: There are control and main holes, the electromagnetic device opens and closes only the control hole, so the maximum and minimum working pressure dependes not on the power of the coil, but only from the structural features of the sealing device of the main opening (diaphragm, piston, etc.) . For this type of valve, the main characteristic is the minimum working pressure, which is always not zero and more zero.
Important parameters.
Maximum pressure dropper (M.R.P.D.), maximum pressure drop between the input and output of the valve, in which the solenoid can safely work. If the outlet pressure is unknown, for the magnitude of M.R.P.D. The input pressure is accepted.
The minimum pressure drop drops is the pressure required to open (closing the valve and hold it in an open (closed) position.
Characteristics:
Model: CeME8415Nn020S D20 G3 / 4 NBR ~ 1x230V 50Hz.
Principle of operation: with servo.
Number of moves: 2-chassis.
Type: normally closed.
Working environment: Air, water, light oils.
Mounting position: It is recommended to mount the valve with a coil in a vertical position. Models 8417, 8418, 8419 must be mounted in a horizontal position with a coil in a vertical position.
Minimum pressure dropper: 0 bar.
Maximum pressure dropper (Mr.p.d.): 4 bar.
Environmental temperature: 80 ° C; In DC devices at temperatures above 40 ° C, operational characteristics (mr.p.d.) may decrease.
Maximum temperature of the work environment: 130 ° C
Pipes input / output: 3/4 ".
Bandwidth characteristic KV: 5.5 m3 / h.
Power supply coil: ~ 1x230V 50Hz.
Weight:
Materials:
- Case: Bronze.
- Seal: NBR, on request EPDM-FPM.
- guide rod: stainless steel (has a metal seal with valve body for working at high temperatures).
- Internal details: stainless steel.

Name	vendor code	Voltage	Price
Valve Solenoid H / Clap. 3/8 "(DU 10)	Semes8613.nbr230	U \u003d 220b.	3 100 rubles.
Solenoid Valve N / Slap.1 / 2 "(DU 15)	Semey8614.nbr230.	U \u003d 220b.	3 100 rubles.
Valve Solenoid H / Clap. 3/4 "(Du 20)	Semese8615.nbr230	U \u003d 220b.	3,300 rubles.
Valve Solenoid H / Clap. 1 "(Du 25)	Semese8616.nbr230.	U \u003d 220b.	3,300 rubles.
Valve Solenoid H / Clap. 1 "1/4 (Du 32)	Semese8617.nbr230	U \u003d 220b.	7 000 rubles.
Valve Solenoid H / Clap. 1 "1/2 (Du 40)	Semese8618.nbr230	U \u003d 220b.	7 000 rubles.
Valve Solenoid H / Clap. 2 "(DU 50)	Semese8619.nbr230.	U \u003d 220b.	11 650 rub.
Valve Solenoid H / Clap. 2 "1/2 (Du 65)	Semes8620.nbr230.	U \u003d 220b.	27 440 rub.
Valve Solenoid H / Clap. 3 "(DU 75)	Semese8621.nbr230	U \u003d 220b.	34 800 rub.
Coil for H / Clap. Valve	Seme BDF / R	U \u003d 220b.	500 rubles.
Coil for H / Clap. Valve	Semese86.	U \u003d 24b.	500 rubles.

Electromagnetic solenoid valves Normally open

Electromagnetic Solenoid Valves Seme

Solenoid electromagnetic valves Seme (Italy) are used in water supply and heat supply networks, in various industries, in water treatment and air conditioning systems. The design is divided into normally open - are in the open position in the absence of nutrition and closed when the current is supplied to the coil, and normally closed valves - There are in a closed position in the absence of power and open when the current is supplied to the coil. Electromagnetic solenoid valves of the seme are installed on pipelines and open or overlap the flow of the working medium when the supply voltage valve is admitted to the coil.
As a control sensor that feeds the signal to open or closure the power supply chain of the seed valve coil, it can be used:

• pressure switch;
• float switch;
• various kinds of level control devices;
• flow switch;
• thermostat and similar devices.

On the pipeline, the solenoid valves are installed in any position (the movement of the working medium should coincide with the arrow indicated on the housing). The most preferred installation option is the coil up. It is not allowed to enter the valves of foreign particles, as well as the use of it is not intended.

Overall and connecting dimensions

RP.	D, MM.	vendor code	Pmin, Bar	PMAH, Bar	KV, M 3 / h	Dimensions, mm.				Mass, kg.
						BUT	IN	FROM	D.
3/8"	10	8613	0,3	10	1,86	61	89	48	77	0,54
1/2"	15	8614	0,3	10	2,1	61	89	48	77	0,5
3/4"	20	8615	0,3	10	5,7	87	101	69	84	0,8
1"	25	8616	0,3	10	9,6	100	106	80	86	1,1
1"1/4	32	8617	0,3	10	22	131	122	112	95	2,5
1"1/2	39	8618	0,3	10	27	146	128	128	98	3
2"	51	8619	0,3	10	35	174	145	146	108	4,6
2"1/2	65	8620	0,3	10	63	245	180	184	134	9,4
3"	75	8621	0,3	10	83	250	190	184	139	11,23

Series	A type	Workspace
52	normally closed
53	normally closed	water, air, light petroleum products, diesel fuel
55	normally closed	water, air, steam, combustible gas, inert gas
59	normally closed
61	normally open
62	normally closed
65	normally open	water, air, steam, gas, light petroleum products, diesel fuel
66	normally closed	water, air, steam, gas, light petroleum products, diesel fuel
67	normally closed	water, Air, Couples, Light Petroleum products
68	normally closed	all types of refrigerants except ammonia (NH3)
83	normally closed	water, air, inert gas, light petroleum products
84	normally closed
85	normally closed	water, Air, Light Petroleum products
88	normally closed	water, air
90	normally closed	par
93	normally closed	water, air, gas, steam, diesel fuel
95	normally closed	water, air, petroleum products, diesel fuel, gas, steam
99	normally closed	water, air, light petroleum products, steam, gas

* On request, it is possible to supply any CEME valves from the presented model range.

Solenoid valves running

Application

The solenoid valve from the Italian company "Sema" is used in heat and water supply networks, in air conditioning and water treatment systems, in industry and various agricultural production.

Description

The solenoid valves are installed in pipelines, and depending on whether they are closed or open, overlap or open the flow for the working medium when the supply voltage is admitted to the valve coil.
Different devices, such as pressure switch, thermostat, duct relay, float switch, and similar devices, can serve as a signal control control sensor for the circuit or opening of the circuit.

Installation and operation

In the pipeline, the valve can be installed in any position, but the working medium must move in the same direction as indicated by the arrow on the housing. The best I. optimal option Location - this is the installation of the coil up. It is very important that foreign particles in the valve area are not allowed. This can have a negative impact.
In addition, manufacturers indicate that the solenoid valve cannot be used non-intended. For example, it is impossible to mount it in the designs that were not initially provided by the developers. It is also forbidden to use the valve in environments, the temperature of which is outside the allowed maximum and minimum. Since if it is used in an unforeseen temperature range, it may fail, resulting in an emergency creation.

Basic data

NBR is used as a material for the production of membranes. If another material is required, then the customer request is possible from FPM-EPDM.
The housing is cast from brass. The internal parts are made of stainless steel.
As a working environment, technical or drinking water, Light petroleum products or air. As can be seen, the solenoid valves can be used almost everywhere.
The electrical connection serves a three-stroke plug P65. It is included.

Solenoid valves normally closed, type 86

RP.	D, MM.	Article	Pmin, Bar	Ratches, bar.	KV, MW / h	Dimensions, mm.				Mass of kg
						BUT	IN	FROM	D.
3/8?	10	8613	0,3	10	1.86	61	89	48	77	0.54
1/2?	12	8614	0,3	10	2.10	61	89	48	77	0.50
3/4?	20	8615	0,3	10	5.70	87	101	69	84	0.80
1?	25	8616	0,3	10	9.60	100	106	80	86	1.10
1?1/4	32	8617	0,3	10	22.00	131	122	112	95	2.50
1?1/2	39	8618	0,3	10	27.00	146	128	128	98	3.00
2?	51	8619	0,3	10	35.00	174	145	146	108	4.60
2?1/2	65	8620	0,3	10	63.00	245	180	184	134	9.40
3?	75	8621	0,3	10	83.00	250	190	184	139	11.23

Solenoid valves normally open, type 87

RP.	D, MM.	Article	Pmin, Bar	Ratches, bar.	KV, MW / h	Dimensions, mm.				Mass of kg
						BUT	IN	FROM	D.
3/8?	10	8713	0,3	10	1.86	61	95	48	83	0.60
1/2?	12	8714	0,3	10	2.10	61	95	48	83	0.55
3/4?	20	8715	0,3	10	5.70	87	107	69	91	0.85
1?	25	8716	0,3	10	9.60	100	113	80	93	1.10
1?1/4	32	8717	0,3	10	22.00	131	128	112	101	2.70
1?1/2	39	8718	0,3	10	27.00	146	135	129	105	3.00
2?	51	8719	0,3	10	35.00	174	151	146	114	4.50
2?1/2	65	8720	0,3	10	63.00	245	186	184	140	9.50
3?	75	8721	0,3	10	83.00	250	196	184	145	11.23

Standard voltage, i.e., AC ~ 230 volts and AC ~ 24 volts, with a frequency of 50 Hz.
If the client needs valves with coils designed to frequency 60 Hz or other voltage, then you will have to do an individual order.

We use electromagitic valves in order to close or open water. I never told about these valves, because I thought that everything was all and so clear. But some time ago I was faced with the fact that this valve had to be serviced and taking the opportunity to decide to make a small post about them.

What is the difference between the electromagnetic valve from the crane with the electric drive and where is it better to put? And in general, what are they needed? And they need to sharply (quickly) open or clean the flow of water or other liquid. Some valves can only work with water, some with air and water. The fact that the valve works quickly is and good and bad. Well it is where you need to dose something on small pressures: watering plants, plot, clean water after the filter. And bad where the water flow rate is large and due to its sharp open / closure, severe hydrate can occur.

That is, the place is such a valve - after pressure reducers on waste water lines. But put it as the main introductory crane so that he closes all the water in the apartment when the protection against leaks is triggered. Because the valve is less reliable than a crane with an electric drive and also gives hydrophole. Crane with an electric drive will be closed slowly and check all sorts of sorts and rust. But the same small sorean can interfere with the valve work, and it will be bad.

Just such a case, I also happened, using them, I decided to see what is inside the electromagnetic valve. It turned out that it is very easy to understand and serviced.

The most popular valves are most popular and easily purchased - these are CeME valves. They usually trades the store http://forwater.ru/shop/125/180/, where they all buy them. These valves are normally closed (this means that until the current has been submitted - the valve is closed) and normally open (when we give the current - the valve will cling). We will be interested in normally closed valves, because we want the whole of our system to consume electricity, until it is necessary to open water, and when it disappears everything closed so that the water does not flow anywhere in vain.

In the early models of these valves, the electromagnet coil was not calculated on big time Work. Somewhere in the hour of work, if water does not flow on the valve and does not cool it, the coil heated strongly and I was scared to forget to turn off the light in the toilet (we are talking about the apartment in Moscow, where I did). Now (I bought a valve a year ago) this glitch is fixed and the coil is not at all warm. Most likely the manufacturer has increased the number of turns of the wire in the coil to reduce the current. This guess is confirmed by the fact that the new coil size is one and a half more than an old one. Once I left for the cottage and forgot to cut out the light in the toilet for two days. Valve is not dead and not even fucked!

Where do I have these valves:

• In the hygienic soul. Here the task of the valve is overlapping the weak flow of water to the waters of the soul. So do when the hygienic shower is assembled without a special mixer embedded in the wall, which usually and regulate the flow of water. Without valve, the waters of the soul will always be under the pressure of water, which is bad for it. And the people came up with putting the valve parallel to the lighting of the toilet. Therefore, when we quench the light in the toilet, the valve turns off the watering can from the pressure.
• In the supply of water on washing machine. In Moscow, it stands in the corridor corner, and before the water to it was supplied by a long flexible eyeliner. Since it was terrible that someday this eyeliner ripples, then the water closed to her with a crane. When I reworked the plumbing, I replaced the eyeliner to the pipe, and instead of the crane I put the valve. Next to the ladle turned out a very convenient unit: socket and switch. I wanted to wash - turned on the machine and immediately the switch immediately. Fixed - turned off.
• In the dispensing of clean water after the filter. This is my mega-cheat! If you want, I somehow drone into Moscow, sprinkle and tell about the automation of my bathroom. The idea is as follows: zadolbalo forget that from under the flow filter water, the kettle is poured slowly. Sometimes you move away to answer a couple of lines in ICQ - and the water is already on the table top and on the floor.
  So I put this valve at the filter outlet and made the time relay with two buttons. I clicked one - and the water is flooded exactly as much as the teapot is enough (it is selected in time). I pressed the second at any time - and the water closes. Convenient to bump!

So here once with this system I have a glitch and arose. Water suddenly ceased to close and began to pinch, and then flow a thin jet. I thought, thought - and decided to disassemble the valve of this node. At first I took off the node itself (the valve, the fitting of John Guest - the so-called fittings for thin tubes for which pure water flow, and regulating valve) and unscrewed the coil from the valve.

And then I took the key and disassembled the valve. This valve works on the difference in water pressure. I did not understand everything with his principle of work, but grasped the very essence. A small squeezed electromagnet leads in motion a piston that opens or closes small holes in the membrane.

If the hole is closed by the piston, the water passes through other holes and presses on the membrane from above, tightly pressing it and closing the path to the exit. And if the piston is open, the water enters the valve output, the pressure is compared with the pressure under the membrane and there it does not interfere with water to flow to the valve output. That is, with the help of a small silent hole we manage great pressure.

The valve opens very easily - you need to unscrew only four screws. Under the top lid there is a small spring, which creates the initial pressure on the membrane and the membrane itself.

In my case, the valve damage was the small fragment of the cheap filter cartridge. His body split into several pieces, and the fragment along the thin tube reached the valve and interfered with the membrane tightly close the valve output:

I was afraid that the membrane broke through that the valve was already broken and that they would have to change. In fact, these are good valves (if applied competently) and after I washed the membrane and cleaned it, everything worked and continues to work further. I have these valves from the moment I launched my plumbing - since 2012.

Here is such a small visor turned out. That is, it is not necessary to apply these valves for overlapping large volumes of water at entering the apartment; You can use them to control water flows at end points according to the "Open - Close" scheme.