Plast-O-Matic CKM Diaphragm Check Valves

Series CKM Check Valves, normally closed in design, feature a patented diaphragm seal that will neither stick nor chatter and is automatic in action. The valves are not dependent upon gravity; therefore, they can be mounted in any position. Even in the absence of reverse flow or pressure, the diaphragm will automatically reposition itself to seal against the valve seat. This is achieved with or without the presence of reverse flow. The unique and patented diaphragm will seal in the same location every time, producing a more reliable and repetitive seal. The molded Series CKM models have only one moving part - the diaphragm. This provides both design simplicity and maximum operating dependability.

• PVC, Corzan® CPVC, or glass-filled polypropylene
• EPDM or Viton™ diaphragms
• Female NPT
• Dependable, repetitive, bubble-tight sealing
• Union nut simplifies valve inspection/removal
• Silent operation since no internal sliding or loose parts
• If reverse pressure is present, it creates a tighter seal
• Diaphragm begins to open at approximately 1 to 1.5 psi
• Inlet pressure rating @ 77°F: 150 psi (except PP with Viton™ which is 100 psi)
• Maximum temp.: 140°F (PVC) & 180°F (PP & CPVC)