Engineered to exceed
the most stringent quality standards.

Mueller Refrigeration offers a complete line of Inline, Four Bolt, and Magnetic check valves. Inline check valves are designed for maximum flow and minimum pressure drop; Four Bolt check valves that can overheat and damage internal components.

Check Valves Masthead
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Style: Inline

CHECKMASTER® Inline check valves offer an enhanced internal design for maximum flow and minimum pressure drop.

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Quality & Technical Information

  • Design Pressure (DP) / Maximum abnormal pressure (MAP): 700 psig, 48 bar
  • Continuous operating temperature (COT): -40°F/300°F, -40°C/149°C
  • Pressure to open: < 1 psi
  • UL/cUL Recognized, Conforms to EU Pressure Equipment Directive and UK Pressure Equipment Regulation
  • Neoprene seat for positive isolation and pulsation dampening
  • Enhanced internal design for maximum flow and minimum pressure drop


  • Air Conditioning
  • Refrigeration
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Specifications & Technical Drawings

  • Inline Style - Dimensions - English / Metric


  • Inline Style - Dimensions - Chinese


  • Inline Style - Dimensions - Spanish