1/4" FNPT x 1/4" FNPT Series 694 Black Polypropylene Check Valve with FKM Seals, 1/3 psi Cracking Pressure & Hastelloy® Spring

1/4" FNPT x 1/4" FNPT Series 694 Black Polypropylene Check Valve with FKM Seals, 1/3 psi Cracking Pressure & Hastelloy® Spring

Item 22639

12.57/Each

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Overview

The 694 Series is the most compact valve in the family, built with 1/4" NPT ports and a Cv of 2.3. Ideal for small-diameter applications, it delivers precise control and low-pressure sealing with disc poppets. Its modular design has a 302 Hastelloy® spring and FKM seal, and its rugged polypropylene construction handles pressures up to 125 psi. It's a dependable choice for OEM systems, lab setups, or compact process applications.

Polypropylene
FKM seals
Hastelloy® Spring
High flow rate
Seat area open diameter: 0.438"
Positive seal at very low back pressure or slight vacuum
Check mechanism: Disc poppet
Cracking pressure: 1/3 psi
Maximum pressure: 125 psi
Maximum temperature: 140°F

Item Information

Item Number: 22639

Catalog Page Number: P-502

Manufacturer: SMC

Manufacturer Part #: 6940790

Country of Origin: USA

Tech Specs

Material: Polypropylene

Seal: FKM

Connection: FNPT x FNPT

Size: 1/4"

Weight: 0.045 lbs

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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