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CP Series Poppet Check Valves, 1/4 in MNPT x 1/4 in MNPT, 316 SS, Cv: 0.35, Cracking Pressure: 1 psig

Description & Features

Constructed from 316 stainless steel, the CP Series Poppet Check Valves offer reliable one-directional flow control in corrosion-demanding industrial environments. This single-piece poppet design connects via 1/4 in MNPT on both ends, making it straightforward to integrate into standard threaded instrument and process lines.

With a Cv of 0.35 and a cracking pressure of 1 psig, this valve is suited for low-pressure applications where minimal back-pressure resistance is required to initiate flow. The 316 SS body provides strong resistance to a wide range of aggressive media, supporting use in chemical processing, instrumentation, and fluid handling systems where stainless material compatibility is essential.

SKU: 4CP4PM-1-316

Supplier Part Number (MPN): 4CP4PM-1-316

Specifications

Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	Supplier Part Number 4CP4PM-1-316	Product Weight 0.09 lbs

Product Questions & Answers (2)

Question by: Melvin B on May 18, 2025, 8:28 PM

got a line running 1/4 inch male NPT on both ends and need a check valve that won't slam shut on me at low pressure. this one gonna work for that?

Answer by: Customer Support on May 20, 2025, 6:21 AM

A 1 psig cracking pressure is about as low as you'll find on a poppet-style check valve, so it opens up real easy without needing much pressure behind it. Both ports are 1/4 in MNPT, so it'll thread right into a standard 1/4 in female NPT fitting on each end. The 316 stainless steel body holds up well where moisture or mild corrosives are a concern. Just keep in mind the Cv is 0.35, which means flow capacity is on the modest side, so it's best suited for lower-flow applications rather than high-volume lines.

Question by: Rex M on May 27, 2025, 8:04 AM

What's the deal with the cracking pressure on this check valve? One PSI, that right?

Answer by: Customer Support on May 28, 2025, 1:24 PM

Correct, the cracking pressure is one psig. This means it will start to open and allow flow when the pressure reaches one pound per square inch.