Danfoss EVR v2 solenoid valves (EVR 2 to EVR 40)

Danfoss EVR v2 solenoid valves are the most widely used controlled shut-off valves in commercial and industrial refrigeration. They open or close a liquid, suction or hot gas line on command from the thermostat or controller. The range runs from the EVR 2 (Kv 0.16 m³/h, about 2 kW in the liquid line with R404A) to the EVR 40 (Kv 24.2 m³/h, about 250 kW), in normally closed or normally open versions, with solder, flare or flange connections, plus the EVRC bi-flow valve. Afric Froid offers the 82 codes of the Danfoss data sheet, on quote.

Choose the size

Kv of the solder version without manual stem. Danfoss rated liquid capacity: evaporating −10 °C, liquid at 25 °C, pressure drop 0.15 bar. Click a type to see its models, its capacities with R22, R134a, R410A, R32, R290 and R600a, and its specifications.

A solenoid valve for every line

• Liquid line: the solenoid valve shuts off the evaporator feed when the system stops, for example in pump-down, and prevents liquid from migrating to the compressor.
• Suction line: it isolates one evaporator in a multi-evaporator system. Suction capacities are lower: choose the size from that line of the table on each page.
• Hot gas line: it controls hot gas injection for defrost or capacity control.

Three operating principles

• EVR 2 and EVR 3, direct operated: the coil opens the seat directly, with no minimum differential pressure.
• EVR 4 to EVR 22, servo operated diaphragm valves: the coil opens a pilot orifice and the system pressure opens the diaphragm. At least 0.03 bar of pressure difference is needed.
• EVR 25, 32 and 40, servo operated piston valves, for high flows: at least 0.2 bar of pressure difference.

The NC (normally closed) version is the most common: the valve is closed when the coil is de-energized. The NO (normally open) version, servo operated, is available from EVR 6 to EVR 22. The EVRC lets liquid flow in the reverse direction, for heat pumps and reverse hot gas defrost.

What version 2 brings

• Working pressure raised to 45.2 bar, and 49 bar under the PED for EVR 2 to 22 solder valves without manual stem: suitable for R410A and R32.
• More than 40 approved refrigerants, including the flammable R290, R600a, R32, R454B and R1234yf for EVR 2 to 22 solder valves without manual stem, and R1234ze(E) in oil-free systems.
• Media from −40 to 105 °C, up to 130 °C during defrost.
• Extended copper ends on solder versions: brazing without dismantling the valve.
• Optional manual stem from EVR 6 upwards, to open the valve with the coil de-energized.

Coils

EVR valve bodies are sold without coil. They take the Danfoss clip-on coils, 230 V AC or DC; the standard coil is the BE230AS (018F6701). The maximum opening differential pressure (MOPD) depends on the coil: 38 bar with a 10 W AC coil for all NC EVR valves.

Afric Froid, your Danfoss supplier

Afric Froid supplies Danfoss solenoid valves, coils and valves, installs them and provides after-sales service in Tunisia, Algeria, Senegal and Ivory Coast. Tell us the refrigerant, the capacity and the line (liquid, suction or hot gas): we will choose the right valve and coil and send you a quote.