Danfoss Type EVR Solenoid Valve for Refrigeration
Danfoss Type Alternative Refrigeration EVR Series Solenoid Valve, EVR valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for condensing units and power packs in all refrigeration, freezing, and air conditioning applications and are compatible with fluorinated refrigerants, including high-pressure refrigerants such as R410A (EVRH). The valves can be delivered as normally open and normally closed valves as well as with or without manual operation. Connection Type has welded and compression fittings. Size from 1/4" to 1-1/8"
Features:
2. Various Voltages.
3. Welded and Flare connection.
4. Coils included/not included
Body material: copper
Fluid Media: refrigerant
Series: EVR3, EVR4, EVR5, EVR10, EVR15, EVR20, EVR25
| Model | Connection Type | △P(bar) | Max.Operating Pressure | Kv(㎥/h) | ||
| Flare | Welded | Min. | MOPO LiquidMOP | |||
| EVR3-2 | 1/4 SAE | 1/4 ODF | 0.0 | 31 | 45 | 0.16 |
| EVR3-3 | 3/8 SAE | 3/8 ODF | 0.0 | 0.27 | ||
| EVR6-3 | 3/8 SAE | 3/8 ODF | 0.05 | 0.8 | ||
| EVR6-4 | 1/2 SAE | 1/2 ODF | 0.8 | |||
| EVR10-4 | 1/2 SAE | 1/2 ODF | 1.9 | |||
| EVR10-5 | 5/8 SAE | 5/8 ODF | 1.9 | |||
| EVR15-5 | 5/8 SAE | 5/8 ODF | 0.2 | 2.6 | ||
| EVR15-6 | 3/4 SAE | 3/4 ODF | 2.6 | |||
| EVR15-7 | —— | 7/8 ODF | 2.6 | |||
| EVR20-7 | —— | 7/8 ODF | 5.0 | |||
| EVR25-9 | —— |  |
10 | |||
1) Kv: The flow rate (m³/h) of water of density 1t/m³ passing through the solenoid valve under the pressure differential of 100 KPa.
2) The MOPD of gaseous medium is about 1 bar higher than that of liquid.
| Model | Nominal Refrigerating Capacity kW | ||||||||
| Liquid | Air Suction | Hot Vapor | |||||||
| R22\R407C | R134a | R404A\R507 | R22\R407C | R134a | R404A\R507 | R22\R407C | R134a | R404A\R507 | |
| EVR3 | 5.40 | 5.00 | 3.80 | —— | —— | —— | 2.0 | 2.00 | 2.00 |
| EVR6 | 16.10 | 14.80 | 11.20 | 1.80 | 1.30 | 1.6 | 7.4 | 5.90 | 6.00 |
| EVR10 | 38.20 | 35.30 | 26.70 | 4.30 | 3.10 | 3.90 | 17.50 | 13.90 | 14.30 |
| EVR15 | 52.30 | 48.30 | 36.50 | 5.90 | 4.20 | 5.30 | 24.00 | 19.00 | 19.60 |
| EVR20 | 101.0 | 92.80 | 70.30 | 11.40 | 8.10 | 10.20 | 46.20 | 36.60 | 37.70 |
| EVR25 | 201.0 | 186.0 | 141.0 | 22.80 | 16.30 | 20.40 | 92.30 | 73.20 | 75.30 |
The working condition for the nominal refrigerating capacity of liquid and air suction is as follows:
Evaporation Temperature: te = -10℃;
Liquid Temperature before Valve: t1 = +25℃;
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℃;
Pressure Drop after Solenoid Valve: △P = 80KPa;
Hot Vapor Temperature: th = +65℃;
Liquid Refrigerant Overcooding: △t = 4K
| applicable Refrigerants: | HCFC or HFC(Customer specified) |
| Applicable Medium Temperature: | -30℃~+105℃ |
| Application Ambient Temperature of Solenoid | -40℃~+65℃ |
| Standard Voltage of Solenoid | AC 380V.AC 220V/50Hz(Customer design is available) |
| Allowable Voltage Fluctuation for Solenoid | +10%~15% |
| Connection of Solenoid | Standard 3-wire insert connector |
1、solenoid(10W); 2、return spring; 3、iron core component(modified PTFE seal)(imported stainless magnet steel); 4、O-ring(CR); 5、valve bonnet; 6、sealing(CR); 7、valve core(movable)(modified PTFE compound diaphragm); 8、baffle; 9、valve body; 10、cap; 11、fixing screws(4); 12、label; 13、copper tube; 14、steel washer
Model EVR solenoid valve is designed following the 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 valve core (modified PTFE) is directly, mounted on the iron core component
The inlet pressure is applied onto the iron core from the upper side. Therefore, the joint action of the inlet pressure, spring force, and 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 cores (7). The guide valve core diaphragm (modified PTFE compound diaphragm) is 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 the 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 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 the pressure rise as the same as the inlet pressure. Consequently, the diaphragm will move downward to close the main valve port.
