SOLENOID VALVES

Electrically operated shut-off valves (Figure 9.6) are required for refrigerant and other circuits. These take the form of a plunger operated by a solenoid and working directly on the valve orifice or through a servo. The usual arrangement is to energize the solenoid to open the valve and de-energize to close. Sizes up to 50 mm bore tube connections are made. Beyond this, the solenoid acts as a pilot to a main servo (see Figure 9.7).

Solenoid valves are used in refrigeration and air-conditioning systems for refrigerant lines, oil pressure pipes (to control oil return and capacity reducers), and water and compressed air lines.

Valve seat Mounting hole

Coil

Armature Valve plate

подпись: coil
armature valve plate

DIN

Plug Cap

A

подпись: din
plug cap
a
SOLENOID VALVESFigure 9.6 Solenoid valve (Danfoss)

SOLENOID VALVES

Figure 9.7 Evaporator pressure regulator valve (Danfoss)

Posted in Refrigeration and Air Conditioning