• pomCKMimage

    http://www.plastomatic.com/ckm-vs-ballcheck.wmv

      Series CKM Check Valves are molded of Type 1, Grade 1, PVC (Polyvinyl Chloride), Glass-filled Polypropylene, Corzan® CPVC, and Kynar® PVDF in sizes 1/2", 3/4" and 1". A machined version, Series CK is available in PTFE in sizes 3/4" and 1". Diaphragms are of EPDM or FKM (Viton®). Threaded connections are standard on all models. Socket end connectors are available on all Series CKM models.
      • Design: Self-sealing - they are not dependent on gravity, mounting position or reverse flow, a significant improvement over ball check valves.
      • Silent Operation: No internal sliding or loose parts to slam or vibrate, chattering is eliminated!
      • Dependability: Leak-free sealing protects against the potential hazards created by reverse flow of corrosive liquids such as acids, caustics and chlorine solutions.
      • Repetitive Long Term Sealing: Diaphragm automatically positions itself against seat in the identical location. Superior to ball check valves which often leak at lower pressures.
      • Convenience: Union nut on Series CKM simplifies valve inspection/removal with minimum piping breakdown.
      • Minimal Cracking Pressure: Diaphragm begins to open at approximately 1.0 to 1.5 PSI.
      • Cost Efficient: Designed to improve system performance and competitively priced.
      • Great Selection: Molded valves available in Geon® PVC, Kynar® PVDF, glass-filled Polypropylene, and now Corzan® CPVC. Series CK available in PTFE.

  • Product Image- Series CKS Self Closing Check Valves

    Series CKS Check Valves are normally-closed in design. They feature a corrosion resistant PFA encapsulated spring which energizes a poppet seal that will neither stick nor chatter and is automatic in action.

    Materials of Construction:  Series CKS Check Valves are available standard in PVC (Polyvinyl Chloride), CPVC, Polypropylene and Kynar® PVDF in sizes 11/2", 2" and 3". Seals are in EPDM, or FKM. Threaded or socket connections are standard.

    Features/Benefits:

    • Designed to provide the same superior performance as the existing 1/2", 3/4" and 1" sizes.
    • Rugged thermoplastic construction meets highest industry standards.
    • Normally-closed design, self-sealing, not dependent upon gravity, mounting position or reverse flow… a significant improvement over ball check valves.
    • Leak-free sealing protects against the potential hazards created by reverse flow of corrosive liquids such as acids, caustics and chlorine solutions.
    • PFA encapsulated stainless steel spring provides bubble-tight seal mounted in any position.
    • Rapid closure by spring-loaded poppet helps to eliminate sudden back-flow water hammer.
    • Positive repetitive sealing: Poppet automatically positions itself against seat in the identical location each time for long cycle life dependability.

    http://uscorp.stage.thomasnet-navigator.com/Asset/pomCKSspecSht.pdf

  • pomckdImage2

    These 1/4" & 1/2" valves utilize a flexible elastomer disk as opposed to Plast-O-Matic's patented diaphragm. The advantage is that the CKD requires even less pressure than the CKM to open. The drawback, of course, is that it is dependent on some reverse pressure for sealing assistance, and in low flow applications requires gravity to seal (install with flow direction "up"). But please note that when used for liquids with a high specific gravity, the disk may "float," so it is therefore recommended to install with flow direction "down" with those types of liquids. Also note that in 1/2" piping systems where high flow is required, the 1/2" Series CKM check valve should be used, unless the super low cracking pressure of

    Series CKD is absolutely a requirement. Flow performance of 1/4" size exceeds the recommended flow rates for fractional size tubing. • Very compact; slim design -- not much larger diameter than corresponding pipe size.

    • Available in Geon PVC, Natural polypro, PTFE and Kynar PVDF;
    • Sizes 1/4" & 1/2".
    • Seals in EPDM or Viton.
    • High performance, heavy-duty design.
    • Maximum pressure is 140 PSI in PVC, 125 PSI in natural polypro, and 100 PSI in Kynar and PTFE.
    • Minimal cracking pressure required.