Home  >  A/C Parts  >  Refrigerant Regulators  > Head Pressure Control Valve 20 psi 5/8" OD Opens on Rise of Differential

Head Pressure Control Valve 20 psi 5/8" OD Opens on Rise of Differential Pressure

Item #:ORD-4-20 
Manufacturer Item: 902877
Manufacturer: PARKER HANNIFIN(AFTERMARKET)
Parker ORD-4-20 Head Pressure Control Valve 20 psi 5/8" OD
ORD-4-20
The ORD valve is a pressure differential valve that responds to changes in the pressure difference across the valve, Figure 6 on the next page. The valve designation stands for Opens on Rise of Differential pressure. Therefore, the ORD is dependent on some other control valve or action for its operation. And in this respect, it is used with the ORI for head pressure control. As the ORI valve starts to throttle the flow of liquid refrigerant from the condenser, a pressure differential is created across the ORD. When the differential reaches setpoint, the ORD starts to open and bypasses hot gas to the liquid drain line. As the differential increases, the ORD opens further until its full stroke is reached at a differential of 10 psi above setpoint. Due to its function in the control of head pressure, the full stroke can be utilized in selecting the ORD. The standard pressure setting for the ORD is 20 psig. For systems where the pressure drop between the compressor and the receiver is higher than 14 psi, an ORD with a higher setting is available.
  • 20 PSI
  • 5/8" OD

    Parker ORD-4-20

    • Refrigerant Regulators

    Brand Name
    Parker
    Part Type
    Head Pressure Control Valve
    Inlet Size
    5/8"
    Pressure Range
    20 PSI
    Connection Type
    ODF
    Outlet Size
    5/8"
    ORD-4-20
    Head Pressure Control Valve 20 psi 5/8" OD Opens on Rise of Differential Pressure
    Quantity: