· Model EVR solenoid valve is a direct-operated or servo-operated valve,which is applicable to one direction flow.
· Model EVR solenoid valve is used on the liquid, air suction or hot vaporpiping of a freezer, cold store and air conditioning unit.
· The valve seat of Model EVR solenoid valve is well sealed with perfectsealing performance.
· Model EVR solenoid valves with various voltage solenoids are availableand the valve body is universal.
· Both packed and separated Model EVR solenoid valves are available andit means the valve body could be supplied separately from the solenoid.

Features:

· Only NC type solenoid valve is available.
· The max. design temperature is 105°C.
· 100-mesh filter is contained at the suction end, which is replaceable.
· 10W high power solenoid and max. operating pressure differential
· (MOPD) is 2.5 MPa.
· It is applicable to various applications in freezer, cold store and air conditioning unit.
· The max. size of flare connection is 3/4 in.
· The max. size of welded connection is 9/8 in.
· The solenoids with various power supply are available.
· The clamped joint solenoid is easy to be mounted or dismounted only with one screwdriver.
· The sealed solenoid has a long service life and it can be used even in an adverse circumstance.

Technical Paramengers:

Specification:

1)Kv:The flow rate (m³/h)of water of density 1 t/m³ passing through the solenoid valve under the pressure differential of 100 KPa.
2)The MOPD of gaseous medium is about 0.1 MPa higher than that of liquid.

The working condition of the nominal refrigerating capacity of liquid and air suction is as follows:
Evaporation Temperature:te=-10°C;
Liquid Temperature before Valve:tl=+25°C;
Pressure Drop after Solenoid Valve:P=15KPa
The working condition of the nominal refrigerating capacity of hot vapor is as follows:
Condensation Temperature:tc=+40°C;
Pressure Drop after Solenoid Valve:P=80KPa;
Hot Vapor Temperature:th=+65°C;
Liquid Refrigerant Overcooling:t=4K

Structure:

Model EVR solenoid valve is designed in accordance with following two operating principles:

1,Direct-operated Solenoid Valve
Model EVR 3 is a direct-operated solenoid valve. When the iron core component(3) moves upward by the magnetic force of the solenoid, the solenoid valve will open directly, that is, the solenoid valve could be operated under zero pressure differential.
The sealing vavle core(modified PTFE) is directly mounted on the iron component(3).
The inlet pressure is applied onto the iron core from the upper side. Therefore, the joint action of the inlet pressure, spring force and the self-gravity of the iron core component will close the valve when the solenoid is not energized.
2,Servo-operated Solenoid Valve
Model EVR 10/15/20 are servo-operated solenoid valves with movable valve core(7). The guide valve core and diaphragm(modified PTFE compound diaphragm) are mounted on the valve core.
The main valve port and guide valve port are closed when the solenoid is not energized. The joint action of the self-gravity of the iron core component, spring force and the pressure differential between inlet and outlet will close the valve.
When the solenoid is energized, the iron core component(3) moves upward to open the guide valve on the diaphragm. The moment the pressure on the diaphragm is decreased and the space above the diaphragm is communicated with the outlet of the valve. The pressure differential between the inlet and outlet moves the diaphragm upward and open. Therefore it needs a minimum pressure differential to open the valve and maintain the opening.
When the power is cut off, the guide valve on the diaphragm is closed and the balance hole on the diaphragm will make the pressure rise as the same as the inlet pressure. Consequently the diaphragm will move downward to close the main valve port.

Overall Dimension:

 Note: Solenoid weight 320g;
 Nut weight is excludud in above mentioned weigh.
 Nut weight:1/4-18g, 3/8-30g, 1/2-33g, 5/8-50g and 3/4-93g.