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Technical Articles
October 3, 2018

Series CKM Self-Closing Thermoplastic Check Valves… NEW

 

 

Patented Diaphragm Design Assures Dependable, Repetitive, Bubble-Tight Sealing… and They Can Be Mounted in Any Position!

 

Click here for a video comparison of ball checks to our patented diaphragm check!

Features/Benefits:

  • 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:

CK & CKM Dimension Drawing


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)

  •  Part numbers shown have Viton seals.
  • For EPDM seals, change “V” to “EP” (CK050EP-TF)

  • Threaded connections only.
   

CAD Drawings:

Flow vs. Pressure Drop Performance:

ckm - graph

Tested under laboratory conditions with FKM (Viton) diaphragm. Maximum flow will not be achieved until the valve is cycled approximately 20 times.

Catalog Page:

For specifications and catalog page in .PDF format, please click here.

 

Installation:

For detailed installation instructions, please click here.

 

Check Valves Homepage

 

Product News:

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.