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

Plast-O-Matic CKM Diaphragm Check Valves

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