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)
Item # Description Catalog Pg. Price Add to Cart
1/2" NPT PVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88249
113.46/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
113.46/Each
3/4" NPT PVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88250
136.15/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
136.15/Each
1" NPT PVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88251
168.57/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
168.57/Each
1/2" NPT PVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88258
126.43/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
126.43/Each
3/4" NPT PVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88259
145.88/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
145.88/Each
1" NPT PVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88260
176.13/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
176.13/Each
1/2" NPT Polypropylene CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88267
179.38/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
179.38/Each
3/4" NPT Polypropylene CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88268
209.63/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
209.63/Each
1" NPT Polypropylene CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88269
242.05/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
242.05/Each
1/2" NPT Polypropylene CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88276
186.94/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
186.94/Each
3/4" NPT Polypropylene CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88277
219.36/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
219.36/Each
1" NPT Polypropylene CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88278
248.53/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
248.53/Each
1/2" NPT CPVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88283
190.18/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
190.18/Each
3/4" NPT CPVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88284
223.68/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
223.68/Each
1" NPT CPVC CKM Diaphragm Check Valve with EPDM Diaphragm
Item 88285
258.26/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
258.26/Each
1/2" NPT CPVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88290
199.91/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
199.91/Each
3/4" NPT CPVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88291
236.64/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
236.64/Each
1" NPT CPVC CKM Diaphragm Check Valve with Viton™ Diaphragm
Item 88292
270.14/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-490
270.14/Each

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