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Features:
  • Continuous operating temperature (COT): -40°F/300°F, -40°C/149°C
  • Contact factory or visit website for compatibility with CFC, HCFC, HFC and HFO refrigerants and oils
  • UL/cUL Recognized, Conforms to Pressure Equipment Directive 2014/68/EU
  • Enhanced internal design for maximum flow and minimum pressure drop
  • Design Pressure (DP) / Maximum abnormal pressure (MAP): Charted below
  • 1/4" - 1/2" sized valves are designed for use with R744 (CO2)
  • 5/8" - 7/8" sized valves are designed for use with R744 in cascading systems or secondary loops where design pressures are below the R744 critical pressure of 1058 psi
  • CHECKMASTER® Check Valves - Piston
    CHECKMASTER® Check Valves - Piston - Dimensionss
    Unit of Measure
    1 

    Item #

    Connection Size

    End Type

    MAP

    Weight

    A 18720 N/A 1/4 in N/A ODS N/A 1305 psi N/A 0.05 kg0.11 lb
    A 18721 N/A 3/8 in N/A ODS N/A 1305 psi N/A 0.05 kg0.12 lb
    A 18722 N/A 1/2 in N/A ODS N/A 1305 psi N/A 0.07 kg0.16 lb
    A 18723 N/A 5/8 in N/A ODS N/A 1000 psi N/A 0.10 kg0.22 lb
    A 18838 N/A 3/4 in N/A ODS N/A 1000 psi N/A 0.19 kg0.43 lb
    A 18724 N/A 7/8 in N/A ODS N/A 1000 psi N/A 0.19 kg0.42 lb
    AH18720 N/A 1/4 in N/A ODS N/A 1305 psi N/A 0.05 kg0.12 lb
    AH18721 N/A 3/8 in N/A ODS N/A 1305 psi N/A 0.05 kg0.12 lb
    AH18722 N/A 1/2 in N/A ODS N/A 1305 psi N/A 0.07 kg0.17 lb
    AH18723 N/A 5/8 in N/A ODS N/A 1000 psi N/A 0.13 kg0.29 lb
    AH18838 N/A 3/4 in N/A ODS N/A 1000 psi N/A 0.19 kg0.43 lb
    AH18724 N/A 7/8 in N/A ODS N/A 1000 psi N/A 0.19 kg0.43 lb
    Unit of Measure
    1