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Diaphragm solenoid valve

电磁阀SV8W 1

Font Size: [Big][Mid][Small] 2017-12-16    Views: 283    


SV-SY/SV-R1/SV series two ways normal closed solenoid valves, it can be widely used in refrigeration, pneumatic and hydraulic system, also in boiler and fire-fighting, etc.

SV-SY series solenoid valve with piston structure, SV-R1/SV series solenoid valve with diaphragm structure.

Solenoid valves use full-closed magnetic coil and DIN international standard electric plug, so it is characterized by its good insulation, waterproof, moisture proof, anti-vibration and corrosion resistance.

 Operating principle:

While energized in coil, the electromagnetic power opens the small orifice. Then the pressure in upside of valve reduced, so the pressure difference between both side of diaphragm happen and lead to diaphragm lift to open the main orifice.

While de-energized in the coil, plug stem will drop and close the small orifice because of spring force and its weight. The flow media enters into upside of diaphragm through throttle hole, then pressure in both side of diaphragm balances, then the diaphragm will drop and close the main orifice.

 Technical data

Ambient temperature: -20  +50℃      Medium temperature: -25  +100

Max. testing pressure: Regular 3.5MPa R410A Solenoid valve 4.8MPa

Max. working pressure: Regular 3MPa R410A Solenoid valve 4.8MPa

Available medium: R134a,R22,R407C,R404A/507R410Aairwater and oil

Rated power: A.C.: 24V,36V,110V,220V,380VD.C.: 12V,24V,110V,220V


1. The valve must install in horizontal pipe line under vertical position. The flow direction must meet the arrow direction in valve body.

2. The coil input voltage must meet rated input voltage showed on the label. Departure coil from valve when energized in coil is not permitted in order to avoid damage the coil.

3. According to valve with manual function, it must turn manual bar to open the valve before doing system air tightness in order to avoid to damage diaphragm.

4. When brazing the valve with connect tube in system, follow points are very important:

a. Before brazing, coil must be departure and use wet fabric cover the valve body to avoid to damage valve part because of high temperature when brazing.

b. It must avoid the brazing flame face to valve body.

c. It is better to adopt low temperature type silver brazing bar.

5. According to valve with manual function. The manual bar must be turned to open the valve before doing system air tightness, in order to avoid to damage the diaphram.

6. Coil must be set to the body when the current on.


 Type  data


The Kv value is the water flow in m3/h at a pressure drop across valve of 0.1MPa,ρ=1000 kg/m3

Letters after the model: “A” means improved type, “W” means solder ODF“K” means normal opened valves.

 Dimension(Unit: mm)