Our diaphragm check valves are specially designed for refrigeration and air conditioning systems, ensuring reliable one-way refrigerant flow. Built with a premium copper body and optional disc materials (NBR rubber or stainless steel), they effectively prevent backflow, protect compressors, and maintain system stability.
• Housing Material: High-strength copper
• Disc Options:
• NBR Rubber – flexible, excellent sealing, noise reduction, ideal for low-temp refrigeration
• Stainless Steel (304/316) – durable, high strength, resistant to wear & corrosion, ideal for high-pressure and industrial HVAC applications
• Application: Refrigeration units, A/C systems, heat pumps, condensing units, commercial HVAC
• Function: One-way refrigerant flow control, backflow prevention, compressor protection
• Features:
• Compact design with flow direction arrow
• Compatible with HFC, HCFC, HFO refrigerants (R134a, R404A, R410A, R452A, R507, R22, etc.)
• Max. working pressure up to 55 bar (800 psig)
• Wide size range: 1/4” to 3-1/8”
NBR Disc Material
Stainless Steel Disc Material
Q1: What disc materials are available?
A: Two options – NBR rubber for better sealing & quiet operation, and stainless steel for durability & high-pressure resistance.
A: Suitable for R134a, R404A, R410A, R452A, R507, R22, and other HFC, HCFC, and HFO refrigerants
A: Up to 55 bar (800 psig) depending on size.
A: No, please install according to the flow direction arrow on the valve body
A:
• Choose NBR for low-temp refrigeration, cold storage, small A/C units.
• Choose Stainless Steel for industrial refrigeration, heat pumps, and high-pressure HVAC systems.