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Series CKS Self Closing Check Valves

In Sizes 1½", 2" and 3"

Series CKS is a normally closed check valve that provides a bubble tight seal and absolutely prevents reverse flow Features/Benefits:

Designed to provide the same superior performance as the existing ½", ¾" & 1" sizes.
Rugged thermoplastic construction meets highest industry standards.
Normally closed design, self sealing, not dependent upon gravity, mounting position or reverse flow...a significant improvement over ball check valves.
Leak-free sealing protects against the potential hazards created by reverse flow corrosive liquids such as acids, caustics and chlorine solutions.
PFA encapsulated stainless steel spring provides bubble-tight seal mounted in any position.
Rapid closure by spring-loaded support helps to eliminate sudden back-flow water hammer.
Positive repetetive sealing: poppet automatically positions itself against seat in the identical location each time for long cycle life dependability.
Convenience: Union nuts simplify valve installation, inspection and removal.
Minimal Cracking Pressure: Valve begins to open and approximately 1.0 to 1.5 PSI.

Materials of Construction:

Plast-O-Matic Series CKS Check Valves are available standard in PVC (Polyvinyl Chloride) and Natural Polypro in sizes 1½", 2" & 3". Consult factory for PVDF. Seals are EPDM, or Viton®. Connections are threaded or socket standard.

Design:

Series CKS Check Valves are normally closed in design. They feature a corrosion resistant PFA encapsulated spring which energizes a poppet seal that will neither stick nor chatter and is automatic in action. The valves are not dependent upon gravity or reverse flow and represent a significant improvement over ball check valves. They can be mounted in any position. Even in the absence of reverse flow or pressure, the poppet will automatically reposition itself to seal against the valve seat. The unique poppet will seal in the identical location every time, producing a reliable and repetetive seal.

Operation:

Flow entering the valve inlet will open the valve by pushing the poppet off the valve seat. In this position, the valve seat is kept clean by flushing action of the internal flow, keeping the entire sealing area free of particles which could cause leakage.

If the inlet flow is stopped, or backflow of a higher pressure is sensed, the spring-loaded poppet will automatically reposition itself, closing off the valve seat. Reverse flow or pressure is not required to close the valve when the inlet stops. If reverse pressure is present it simply creates a tighter seal.

Dimensions:

**Series CKS - Molded Models: PVC, GPP & PVDF**
Pipe Size (NPT)	A		B		C		Model Number
	IN.	mm	IN.	mm	IN.	mm
1½	7.4	188	2.5	64	3.5	89	CKS150V-NC-PV
2	8.4	213	3.3	83	4.5	114	CKS200V-NC-PV
3	9.9	251	4.3	109	5.5	140	CKS300V-NC-PV

Installation:

Because of its normally closed design the Plast-O-Matic CKS Check Valves can be installed in any position; concern over the valve seat closing due to gravity (as with ball check designs) is of no consequence since CKS valves seal in any position.

For more detailed installation instructions please click below:
CKS Self-Closing Check Valves - Installation Sheet

For a .PDF file - please click below:
Large Check Valves-(PDF)

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Viton® is a registered trademark of DuPont Dow Elastomers.,
Kynar® is a registered trademark of Atofina., Corzan™ is a trademark of Noveon

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