Parker 040193-01

¼” x ⅜” ODF AS Constant Pressure Valve

• Simple, inexpensive, reliable
• One valve can be employed for all refrigerants. It has an adjustment range of 5”HG to 90 psig
• Optional bypass bleeds provide complete system unloading when a 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
• Constant pressure valves are U.L. \& C.S.A. approved

*** Not Rated for use with R410A** * UL recognized for maximum operating pressure 500 PIS, 400 PSI low site