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.
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N/A . N/A 1/4" PVC Viton Seal Compact Diaphragm Check Valve $101.86 Add To Cart
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N/A . N/A 1/4" PVC EPDM Seal Compact Diaphragm Check Valve $96.50 Add To Cart
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N/A . N/A 1/4" Natural Polypro Viton Seal Compact Diaphragm Check Valve $128.67 Add To Cart
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N/A . N/A 1/4" Natural Polypro EPDM Seal Compact Diaphragm Check Valve $123.31 Add To Cart
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N/A . N/A 1/4" Natural PTFE Viton Seal Compact Diaphragm Check Valve $235.91 Add To Cart
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N/A . N/A 1/4" PTFE EPDM Seal Compact Diaphragm Check Valve $230.53 Add To Cart
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N/A . N/A 1/4" Natural PVDF Viton Seal Compact Diaphragm Check Valve $344.21 Add To Cart
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N/A . N/A 1/4" PVDF EPDM Seal Compact Diaphragm Check Valve $332.38 Add To Cart
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N/A . N/A 1/2" PVC Viton Seal Compact Diaphragm Check Valve $115.79 Add To Cart
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N/A . N/A 1/2" PVC EPDM Seal Compact Diaphragm Check Valve $110.47 Add To Cart
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N/A . N/A 1/2" Natural Polypro Viton Seal Compact Diaphragm Check Valve $144.77 Add To Cart
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N/A . N/A 1/2" Natural Polypro EPDM Seal Compact Diaphragm Check Valve $139.41 Add To Cart
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N/A . N/A 1/2" Natural PTFE Viton Seal Compact Diaphragm Check Valve $263.76 Add To Cart
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N/A . N/A 1/2" PTFE EPDM Seal Compact Diaphragm Check Valve $258.44 Add To Cart
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N/A . N/A 1/2" Natural PVDF Viton Seal Compact Diaphragm Check Valve $394.59 Add To Cart
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N/A . N/A 1/2" PVDF EPDM Seal Compact Diaphragm Check Valve $388.14 Add To Cart
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