C e m solenoid valve. C.M.E. solenoid valves Normally open solenoid valves

We use solenoid valves to close or open water. I never talked about these valves, because I thought that everything was clear to everyone. But some time ago I was faced with the fact that this valve had to be serviced and taking this opportunity I decided to make a small post about them.

What is the difference between a solenoid valve and a crane with an electric drive and where is it better to put it? And in general, what for are they needed? And they are needed in order to abruptly (quickly) open or close 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 both good and bad. This is good where you need to dose something at low pressures: watering plants, a plot, clean water after the filter. And it is bad where the water flow rate is high and due to its abrupt opening / closing, a severe water hammer may occur.

That is, the place for such a valve is after the pressure reducers on the outgoing water lines. But it is not necessary to put it as the main inlet valve so that it 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 a water hammer will suit. The motorized valve will close slowly and crank up any debris and rust. But the same small weed can interfere with the operation of the valve, and this will be bad.

Just such a case happened to me and I, using it, decided to see what is inside the solenoid valve. It turned out to be very easy to disassemble and maintain.

The most popular and easily purchased valves among the people are the CEME valves. They are usually sold by the store http://forwater.ru/shop/125/180/, where everyone buys them. These valves are normally closed (this means that until the current is supplied, the valve is closed) and normally open (when we apply current, the valve will close). We will be interested in normally closed valves, because we want our entire system not to consume electricity until it is necessary to open the water, and if it goes missing, it closes everything so that the water does not flow anywhere in vain.

In the early models of these valves, the solenoid coil was not designed for big time work. For about an hour of work, if water does not flow through the valve and does not cool it, the coil gets very hot and I was scared to forget to turn off the light in the toilet (we are talking about an apartment in Moscow where I made it). Now (I bought the valve a year ago) this glitch has been fixed and the coil almost does not heat up at all. Most likely the manufacturer has increased the number of turns of wire in the coil in order to reduce the current. This guess is confirmed by the fact that the new coil is one and a half times larger than the old one. Once I went to the dacha and forgot to turn off the light in the toilet for two days. The valve is not dead or even hot!

Where do I use these valves:

• In a hygienic shower. Here the task of the valve is to block the weak flow of water to the shower head. This is done when a hygienic shower is assembled without a special mixer built into the wall, which is usually used to regulate the flow of water. Without a valve, the shower head will always be under water pressure, which is bad for it. And the people came up with the idea of ​​putting the valve parallel to the toilet lighting. Therefore, when we turn off the light in the toilet, the valve cuts off the pressure from the shower head.
• In the water supply to the washing machine. In Moscow, it stands in the corner of the corridor, and before, water was supplied to it with a long flexible eyeliner. Since it was scary that someday this eyeliner would burst, the water was closed to it with a tap. When I was reworking the plumbing, I replaced the eyeliner with a pipe, and put a valve instead of a tap. Next to the washing machine, a very convenient unit turned out: an outlet and a switch. Wanted to wash - turned on the machine and immediately the switch. I washed it - turned it off.
• Dosing clean water after the filter. This is my mega cheat! If you want, I somehow drive you to Moscow, take a picture and tell you about the automation of my bathroom. The idea is as follows: you are tired of forgetting that the kettle is poured slowly from under the flowing water filter. Sometimes you go back to answer a couple of lines in ICQ - and the water is already on the tabletop and on the floor.
  So I put such a valve at the filter outlet and made a time relay with two buttons. I pressed one - and the water is poured exactly as much as the kettle is enough to fill (selected in time). I pressed the second one at any moment - and the water closes. Convenient to eerie!

So once with this system I got a glitch. The water suddenly stopped closing by itself and began to undermine, and then flow in a thin stream. I thought, thought - and decided to disassemble the valve of this unit. First, I removed the assembly itself (valve, John Guest fitting - the so-called fittings for thin tubes, along which pure water flows, and the control valve) and unscrewed the coil from the valve.

And then he took the key and disassembled the valve. This valve operates on the difference in water pressure. I haven’t fully figured out how it works, but I have grasped the very essence. A small, frail electromagnet drives a piston that opens or closes small holes in the membrane.

If the hole is closed by the piston, then the water passes through the other holes and presses on the membrane from above, pressing it tightly and closing the exit path. And if the piston is opened, then the water enters the valve outlet, its pressure is compared with the pressure under the membrane and there it does not interfere with the flow of water to the valve outlet. That is, with the help of a small frail hole, we control a lot of pressure.

The valve opens very easily - only four screws need to be unscrewed. There is a small spring under the top cover that creates initial pressure on the diaphragm and the diaphragm itself.

In my case, the damage to the valve was a small fragment of a cheap filter cartridge. Its body split into several pieces, and a fragment through a thin tube reached the valve and prevented the membrane from tightly closing the valve outlet:

I was afraid that the membrane had broken, that the valve had already broken and that they would have to be replaced. In fact, these valves are good (if you use them correctly), and after I washed the membrane and cleaned it, everything worked and continues to work further. These valves have served me since the moment I put my plumbing into operation - since 2012.

Here is such a small reviewer turned out. That is, it is not necessary to use these valves to shut off large volumes of water at the entrance to the apartment; they can be used to control the flow of water at the end points according to the "open-close" scheme.

Solenoid valves occupy a significant part of the company's product range. This Italian company produces more than 20 series of solenoid valves designed to control the flows of transported media of various aggregates and varying degrees of aggressiveness.

Applications

Shut-off valves from this manufacturer can be installed in the following systems for conveying liquid and gaseous media:

• Water and steam supply lines. And for water potable quality need special normally closed or open solenoid valves with DVGW seal and for steam with EPDM seal. Such fittings are suitable for an iron, for washing machine, for a vacuum cleaner powered by a household power supply (220 volts).
• Lines for supplying petroleum products. However, a special FPM seal is required for diesel or light oil. It protects normally open or closed valves from leaking chemically active media that will corrode water gaskets from the first hour of operation. Therefore, the solenoid valves for diesel engines are allocated in a special series.
• Gas supply lines. Practically any normally closed or open solenoid valves can be used only for gases of inert type, for example, suitable for water (technical). And for flammable media - propane and so on - you need a special gas fittings certified according to the CEE 90/396 standard. A standard water or steam valve is not useful here. Moreover, for gas - fuel, you also need a special coil operating under a voltage of 12 volts or 24 volts. This voltage eliminates arcing.
• Coolant supply lines. In this case, normally open or open solenoid valves with an insert suitable for low temperature liquid or gases of any type other than ammonia are needed. Moreover, the solenoid of such a valve should work even in 50-degree frost. Although for an air conditioner or household refrigerators fittings with lower frost resistance can be used.

Where to buy solenoid valves?

In Russia, you can buy CEME solenoid valves only from resellers or at the official dealerships of this brand.

Dealers offer a limited assortment, without subsequent purchase support. Moreover, their product may turn out to be a Chinese fake. original product from Italy. In this case, it does not matter how much the product costs - its operation will cost the buyer much more than the initial expenses.

Official dealers of CEME, such as our online store site, do not dump "in spite of" competitors, but offer more substantial than low prices, Benefits.

What are the benefits of an online store website?

• Firstly, the site is the official distributor of Ceme. Therefore, we only trade in original products.
• Secondly, even specialized types of fittings can be bought in our store. The store site offers a selection of products comparable to the official site, supplied directly from Italy.
• Thirdly, the site offers an organized delivery of goods in Moscow and all over Russia. In addition, delivery on order to Belarus and Kazakhstan is also possible.

Name	vendor code	Voltage	Price
Solenoid valve n / closed 3/8 "(DN 10)	CEME8613.NBR230	U = 220V	RUB 3,100
Solenoid valve n / closed 1/2 "(DN 15)	SEME8614.NBR230	U = 220V	RUB 3,100
Solenoid valve n / closed 3/4 "(DN 20)	SEME8615.NBR230	U = 220V	RUB 3,300
Solenoid valve n / closed 1 "(DN 25)	SEME8616.NBR230	U = 220V	RUB 3,300
Solenoid valve n / closed 1``1 / 4 (DN 32)	CEME8617.NBR230	U = 220V	RUB 7,000
Solenoid valve n / closed 1``1 / 2 (DN 40)	SEME8618.NBR230	U = 220V	RUB 7,000
Solenoid valve n / closed 2 "(DN 50)	SEME8619.NBR230	U = 220V	RUB 11 650
Solenoid valve n / closed 2``1 / 2 (DN 65)	SEME8620.NBR230	U = 220V	RUB 27,440
Solenoid valve n / closed 3 "(DN 75)	SEME8621.NBR230	U = 220V	RUB 34 800
Coil for n / a closed valve	SEME BDF / R	U = 220V	RUB 500
Coil for n / a closed valve	CEME86	U = 24B	RUB 500

Normally open solenoid valves

CEME solenoid valves

Solenoid electromagnetic valves CEME (Italy) are used in water supply and heat supply networks, in various industries industry, in water treatment and air conditioning systems. By design, they are divided into normally open- are in the open position when there is no power supply and close when current is applied to the coil, and normally closed valves- are in the closed position when there is no power supply and open when the coil is energized. CEME solenoid valves are installed on pipelines and open or shut off the flow of the working medium when the supply voltage enters the valve coil.
The following can be used as a control sensor giving a signal to open or close the power supply circuit of the CEME valve coil:

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

On the pipeline, solenoid valves are installed in any position (the movement of the working medium must coincide with the arrow indicated on the body). The most preferred installation is coil up. It is not allowed to get into the valves of foreign particles, as well as to use it for other purposes.

Overall and connecting dimensions

Rp	D, mm	vendor code	Pmin, bar	Pmax, bar	Kv, m 3 / h	Dimensions, mm				Weight, kg
						A	V	WITH	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

Solenoid valve SEME of pilot action 2/2 way normally closed D25 G1 NBR ~ 1x230V 50Hz art. 8556NN025S CEME

Art. 8556NN250SA57

Classification.


Positions:
- 2- open - closed.




Operating principle:


Important parameters.


Specifications:
Model: 8556NN020S D25 G1 NBR ~ 1x230V 50Hz.


Type: normally closed.






Inlet / outlet pipes: 1 ”.
KV flow rate: 9.6 m3 / h.

The weight:
Materials:
- Body: bronze.

Solenoid valve CEME of pilot action 2/2 way normally closed D20 G3 / 4 NBR ~ 1x230V 50Hz art. 8555NN020S CEME

Art. 8555NN200SA57

Solenoid Ceme valves(Italy) are used in water and heat supply networks, in various industries, in water treatment and air conditioning systems, in fountain installations.
Solenoid valves are installed on pipelines in almost any position (coil down is an undesirable option) and, depending on the version, (normally closed or normally open) open or shut off the flow of the working medium when the supply voltage enters the valve coil.
A pressure switch, a float switch, various types of level control devices, a flow switch, a thermostat and the like can be used as a control sensor giving a signal to open or close the power supply circuit of the valve coil.
Classification.
By the number of strokes (channels connecting different contours):
- 2 way - 2 /: one inlet, one outlet.
- 3-way -3 /: one inlet, one outlet and one air outlet, or three ways in various combinations.
Positions:
- 2- open - closed.
- Adjustable position, some models.
Working conditions. This parameter indicates whether the valve is in the OPEN (with the flow of the medium) or CLOSED (without the flow of the medium) state the valve is most of the time.
- N.C. Normally closed: the valve is closed when there is no supply voltage at the coil terminals.
- N.O. Normally open: on the contrary, under the conditions mentioned above, the valve is open.
Operating principle:
Depending on the value of the minimum cut-off pressure (equal to zero or greater than zero), the valves are either direct acting or with a servo drive.
- Direct action: The medium passage is opened or closed by a sealing piece mounted directly on a plunger with an electromagnet controlled by a coil. Working pressure directly depends on the diameter of the hole and the power of the coil; the minimum working pressure is zero.
- With a servo drive: there are control and main holes, the electromagnetic device opens and closes only the control hole, therefore the maximum and minimum working pressures do not depend on the power of the coil, but only on design features sealing device of the main hole (diaphragm, piston, etc.). For this type of valve, the main characteristic is the minimum working pressure, which is always non-zero and greater than zero.
Important parameters.
Maximum operating differential pressure (M.R.P.D.), the maximum differential pressure between the valve inlet and outlet at which the solenoid can operate safely. If the outlet pressure is unknown, the value of M.R.P.D. the inlet pressure is assumed.
The minimum operating pressure drop is the pressure required to open (close the valve and hold it open (closed).
Specifications:
Model: 8555NN020S D20 G3 / 4 NBR ~ 1x230V 50Hz.
Operating principle: with a servo drive.
Number of strokes: 2-way.
Type: normally closed.
Working medium: air, water, light oils.
Mounting position: any; the position with the coil down is not recommended.
Minimum operating differential pressure: 0.25 bar.
Maximum operating differential pressure (M.R.P.D.): 10 bar.
Temperature the environment: 80 ° C; in devices direct current at temperatures above 40 ° C, performance characteristics(M.R.P.D.) may decrease.
Maximum working environment temperature: 90 ° C
Inlet / outlet pipes: 3/4 ”.
Flow rate KV: 5.7 m3 / h.
Coil supply voltage: ~ 1x230V 50Hz.
The weight:
Materials:
- Body: bronze.
- Seal: NBR, EPDM-FPM on request.
- Guide rod: stainless steel(has a metal seal with valve body for high temperature service).
- Internal details: stainless steel.

Solenoid valve CEME normally closed D15 G1 / 2 NBR ~ 1x230V 50Hz pilot action 2/2 way 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.
Solenoid valves are installed on pipelines in almost any position (coil down is an undesirable option) and, depending on the version, (normally closed or normally open) open or shut off the flow of the working medium when the supply voltage enters the valve coil.
A pressure switch, a float switch, various types of level control devices, a flow switch, a thermostat and the like can be used as a control sensor giving a signal to open or close the power supply circuit of the valve coil.
Classification.
By the number of strokes (channels connecting different contours):
- 2 way - 2 /: one inlet, one outlet.
- 3-way -3 /: one inlet, one outlet and one air outlet, or three ways in various combinations.
Positions:
- 2- open - closed.
- Adjustable position, some models.
Working conditions. This parameter indicates whether the valve is in the OPEN (with the flow of the medium) or CLOSED (without the flow of the medium) state the valve is most of the time.
- N.C. Normally closed: the valve is closed when there is no supply voltage at the coil terminals.
- N.O. Normally open: on the contrary, under the conditions mentioned above, the valve is open.
Operating principle:
Depending on the value of the minimum cut-off pressure (equal to zero or greater than zero), the valves are either direct acting or with a servo drive.
- Direct acting: the medium passage is opened or closed by a sealing piece mounted directly on a plunger with an electromagnet controlled by a coil. Working pressure directly depends on the diameter of the hole and the power of the coil; the minimum working pressure is zero.
- With a servo drive: there are control and main holes, the electromagnetic device opens and closes only the control hole, therefore the maximum and minimum working pressures do not depend on the power of the coil, but only on the design features of the sealing device of the main hole (diaphragm, piston, etc.) ... For this type of valve, the main characteristic is the minimum working pressure, which is always non-zero and greater than zero.
Important parameters.
Maximum operating differential pressure (M.R.P.D.), the maximum differential pressure between the valve inlet and outlet at which the solenoid can operate safely. If the outlet pressure is unknown, the value of M.R.P.D. the inlet pressure is assumed.
The minimum operating pressure drop is the pressure required to open (close the valve and hold it open (closed).
Specifications:
Model: 8554NN012S 15 G1 / 2 NBR ~ 1x230V 50Hz.
Operating principle: with a servo drive.
Number of strokes: 2-way.
Type: normally closed.
Working medium: air, water, light oils.
Mounting position: any; the position with the coil down is not recommended.
Minimum operating differential pressure: 0.25 bar.
Maximum operating differential pressure (M.R.P.D.): 10 bar.
Ambient temperature: 80 ° C; in DC devices at temperatures above 40 ° C, performance (M.R.P.D.) may be degraded.
Maximum working environment temperature: 90 ° C
Inlet / outlet pipes: 1/2 ”.
Flow rate KV: 2.1 m3 / h.
Coil supply voltage: ~ 1x230V 50Hz.
Weight: 0.400 kg
Materials:
- Body: bronze.
- Seal: NBR, EPDM-FPM on request.
- Guide stem: stainless steel (has a metal seal with valve body for high temperature service).
- Internal details: stainless steel.

Solenoid valve D25 G1 "NBR ~ 1x230V 50Hz 2/2 way 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.
Solenoid valves are installed on pipelines in almost any position (coil down is an undesirable option) and, depending on the version, (normally closed or normally open) open or shut off the flow of the working medium when the supply voltage enters the valve coil.
A pressure switch, a float switch, various types of level control devices, a flow switch, a thermostat and the like can be used as a control sensor giving a signal to open or close the power supply circuit of the valve coil.
Classification.
By the number of strokes (channels connecting different contours):
- 2 way - 2 /: one inlet, one outlet.
- 3-way -3 /: one inlet, one outlet and one air outlet, or three ways in various combinations.
Positions:
- 2- open - closed.
- Adjustable position, some models.
Working conditions. This parameter indicates whether the valve is in the OPEN (with the flow of the medium) or CLOSED (without the flow of the medium) state the valve is most of the time.
- N.C. Normally closed: the valve is closed when there is no supply voltage at the coil terminals.
- N.O. Normally open: on the contrary, under the conditions mentioned above, the valve is open.
Operating principle:
Depending on the value of the minimum cut-off pressure (equal to zero or greater than zero), the valves are either direct acting or with a servo drive.
- Direct acting: the medium passage is opened or closed by a sealing piece mounted directly on a plunger with an electromagnet controlled by a coil. Working pressure directly depends on the diameter of the hole and the power of the coil; the minimum working pressure is zero.
- With a servo drive: there are control and main holes, the electromagnetic device opens and closes only the control hole, therefore the maximum and minimum working pressures do not depend on the power of the coil, but only on the design features of the sealing device of the main hole (diaphragm, piston, etc.) ... For this type of valve, the main characteristic is the minimum working pressure, which is always non-zero and greater than zero.
Important parameters.
Maximum operating differential pressure (M.R.P.D.), the maximum differential pressure between the valve inlet and outlet at which the solenoid can operate safely. If the outlet pressure is unknown, the value of M.R.P.D. the inlet pressure is assumed.
The minimum operating pressure drop is the pressure required to open (close the valve and hold it open (closed).
Specifications:
Model: 8416NN025S C57 D25 G1 NBR ~ 1x230V 50Hz
Operating principle: with a servo drive.
Number of strokes: 2-way.
Type: normally closed.
Working medium: air, water, light oils.



Ambient temperature: 80 ° C; in DC devices at temperatures above 40 ° C, performance (M.R.P.D.) may be degraded.
Maximum working environment temperature: 90 ° C
Inlet / outlet pipes: 1 ”.
Flow rate KV: 7.50 m3 / h.
Coil supply voltage: ~ 1x230V 50Hz.
The weight:
Materials:
- Body: bronze.
- Seal: NBR, EPDM-FPM on request.
- Guide stem: stainless steel (has a metal seal with valve body for high temperature service).
- Internal details: stainless steel.

Solenoid valve D20 G3 / 4 "NBR ~ 1x230V 50Hz 2/2 way 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.
Solenoid valves are installed on pipelines in almost any position (coil down is an undesirable option) and, depending on the version, (normally closed or normally open) open or shut off the flow of the working medium when the supply voltage enters the valve coil.
A pressure switch, a float switch, various types of level control devices, a flow switch, a thermostat and the like can be used as a control sensor giving a signal to open or close the power supply circuit of the valve coil.
Classification.
By the number of strokes (channels connecting different contours):
- 2 way - 2 /: one inlet, one outlet.
- 3-way -3 /: one inlet, one outlet and one air outlet, or three ways in various combinations.
Positions:
- 2- open - closed.
- Adjustable position, some models.
Working conditions. This parameter indicates whether the valve is in the OPEN (with the flow of the medium) or CLOSED (without the flow of the medium) state the valve is most of the time.
- N.C. Normally closed: the valve is closed when there is no supply voltage at the coil terminals.
- N.O. Normally open: on the contrary, under the conditions mentioned above, the valve is open.
Operating principle:
Depending on the value of the minimum cut-off pressure (equal to zero or greater than zero), the valves are either direct acting or with a servo drive.
- Direct acting: the medium passage is opened or closed by a sealing piece mounted directly on a plunger with an electromagnet controlled by a coil. Working pressure directly depends on the diameter of the hole and the power of the coil; the minimum working pressure is zero.
- With a servo drive: there are control and main holes, the electromagnetic device opens and closes only the control hole, therefore the maximum and minimum working pressures do not depend on the power of the coil, but only on the design features of the sealing device of the main hole (diaphragm, piston, etc.) ... For this type of valve, the main characteristic is the minimum working pressure, which is always non-zero and greater than zero.
Important parameters.
Maximum operating differential pressure (M.R.P.D.), the maximum differential pressure between the valve inlet and outlet at which the solenoid can operate safely. If the outlet pressure is unknown, the value of M.R.P.D. the inlet pressure is assumed.
The minimum operating pressure drop is the pressure required to open (close the valve and hold it open (closed).
Specifications:
Model: CEME8415NN020S D20 G3 / 4 NBR ~ 1x230V 50Hz.
Operating principle: with a servo drive.
Number of strokes: 2-way.
Type: normally closed.
Working medium: air, water, light oils.
Mounting position: It is recommended to mount the valve with coil in a vertical position. Models 8417, 8418, 8419 should be mounted horizontally with the spool in a vertical position.
Minimum operating pressure drop: 0 bar.
Maximum operating differential pressure (M.R.P.D.): 4 bar.
Ambient temperature: 80 ° C; in DC devices at temperatures above 40 ° C, performance (M.R.P.D.) may be degraded.
Maximum working environment temperature: 130 ° C
Inlet / outlet pipes: 3/4 ”.
Flow rate KV: 5.5 m3 / h.
Coil supply voltage: ~ 1x230V 50Hz.
The weight:
Materials:
- Body: bronze.
- Seal: NBR, EPDM-FPM on request.
- Guide stem: stainless steel (has a metal seal with valve body for high temperature service).
- Internal details: stainless steel.