- One valve can be employed for 3 basic refrigerants. It has adjustment range of 5" to 90 psig.

- Optional bleeds provide complete system unloading when machine is de-energized.

- Maintains constant evaporator pressure under all load conditions.

- Provides freeze-up protection on a/c systems by keeping the evaporator above the freezing point at low loads.

- Automatically protects against motor overloads during system start-up.

- Permits use of low starting torque motors,

- Protects against overloads caused by high amperage draw by maintaining constant suction even at high (ambient conditions) head pressure.

- Balanced port design maintains steady outlet pressure regardless of changing inlet (condenser) pressure.

- Large equalizer passageway insures that oil won't affect diaphragm operation under low loads and when valve is mounted upside down.

Three forces control the operation of the valve:

Force 1 - the adjustable range spring above the diaphragm It moves the diaphragm down, opening the valve.

Force 2 - the closing spring beneath the diaphragm. It moves the push rod and ball assembly up, closing the valve.