Patented 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.
This simple animation shows the valve starting in the normally closed position, opening, and then closing bubble tight with zero inlet pressure. Flow is from left to right.
Specifications:
Dimensions & Ordering Information:
PVC, CPVC, PP & PVDF body valve is Series CKM…
Series CKM Pipe Size (NPT)
A
IN
mm
B
IN
mm
C
IN
mm
Model Number
1/2″
3.8
97
1.3
33
2.4
62
CKM050V-PV
3/4″
4.1
105
1.6
39
2.8
72
CKM075V-PV
1″
4.7
120
1.9
48
2.8
72
CKM100V-PV
CKM(series) 050(size) V(seal material) – PV(body material). Part numbers shown are Viton seals with PVC bodies.
• For EPDM seals, change “V” to “EP” (CKM050EP-PV) • For Kynar PVDF body, change “-PV” to “-PF” (CKM050V-PF) • For Polypropylene body, change “-PV” to “-PP” (CKM050V-PP) • For Corzan CPVC body, change “-PV” to “-CP” (CKM050V-CP)
Standard connections are threaded. For socket connection, add “S” after seal material (CKM050VS-PV) For spigot or other connection types, consult factory.
PTFE body valve is Series CK…
Series CK Pipe Size (NPT)
A
IN
mm
B
IN
mm
C
IN
mm
Model Number
3/4″
3.8
97
1.3
33
2.4
62
CKM050V-PV
1″
4.1
105
1.6
39
2.8
72
CKM075V-PV
CK (series) 050(size) V (seal material) – TF (body material)
April 2004: Series CKM is offered in Corzan CPVC. Corzan CPVC (chlorinated polyvinylchloride) offers many of the same advantages of grade 1/type 1 PVC, with additional service temperature range to 180ºF. Corzan is a well known brand of CPVC resin manufactured by Noveon, Inc. Series CKM in Corzan CPVC is available for threaded or socket installation, with Viton or EPDM diaphragm.
August 2022: Natural polypropylene added to the CKM line; refer to the product catalog for more information. Socket connections only.
September 2022: Found elsewhere on the web….a helpful definition of check valves provided by ValveMan.com underscores the benefit of the Plast-O-Matic patented diaphragm design. “Check valves work using the difference in pressure between the inlet and outlet sides of the valve. When the inflow pressure is higher than the pressure on the outlet side of the valve, it opens, allowing the media to flow through. If the pressure on the outlet side becomes higher, the valve immediately shuts off, preventing reverse flow.” The CKM design has a distinct advantage in that there is no pressure differential required; it closes bubble-tight simply with the absence of forward flow.
