COF Series Viton® Seal Nipple Piston Check Valves On Industrial Specialties Mfg., Inc.

COMPANY HEADER

Male x Male NPT check valve. Thread sizes include 1/8", 1/4", 3/8" and 1/2" . 302 Stainless Steel spring. Brass bodies have a Beryllium Copper Retainer. Maximum operating pressure is 500 psi.

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Item #	Inlet	Outlet	Seal	Cracking Pressure	Body Material

COF-2M-2.5#-V-NI	N/A 1/8" Male NPT	N/A 1/8" Male NPT	N/A Viton®	N/A 2.5 psi	N/A Nickel Plated
COF-4M-3#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 3 psi	N/A Brass
COF-4M-3#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 3 psi	N/A Nickel Plated
COF-2M-3.5#-V-B	N/A 1/8" Male NPT	N/A 1/8" Male NPT	N/A Viton®	N/A 3.5 psi	N/A Brass
COF-2M-3.5#-V-NI	N/A 1/8" Male NPT	N/A 1/8" Male NPT	N/A Viton®	N/A 3.5 psi	N/A Nickel Plated
COF-4M-5#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 5 psi	N/A Brass
COF-6M-5#-V-B	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 5 psi	N/A Brass
COF-8M-5#-V-B	N/A 1/2" Male NPT	N/A 1/2" Male NPT	N/A Viton®	N/A 5 psi	N/A Brass
COF-4M-5#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 5 psi	N/A Nickel Plated
COF-6M-5#-V-NI	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 5 psi	N/A Nickel Plated
COF-8M-5#-V-NI	N/A 1/2" Male NPT	N/A 1/2" Male NPT	N/A Viton®	N/A 5 psi	N/A Nickel Plated
COF-6M-6.5#-V-B	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 6.5 psi	N/A Brass
COF-6M-6.5#-V-NI	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 6.5 psi	N/A Nickel Plated
COF-4M-10#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 10 psi	N/A Brass
COF-4M-10#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 10 psi	N/A Nickel Plated
COF-4M-1/3#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 1/3 psi	N/A Brass
COF-4M-1/3#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 1/3 psi	N/A Nickel Plated
COF-4M-20#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 20 psi	N/A Brass
COF-4M-20#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 20 psi	N/A Nickel Plated
COF-4M-25#-V-B	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 25 psi	N/A Brass
COF-4M-25#-V-NI	N/A 1/4" Male NPT	N/A 1/4" Male NPT	N/A Viton®	N/A 25 psi	N/A Nickel Plated
COF-6M-12#-V-B	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 12 psi	N/A Brass
COF-6M-12#-V-NI	N/A 3/8" Male NPT	N/A 3/8" Male NPT	N/A Viton®	N/A 12 psi	N/A Nickel Plated
COF-2M-5#-V-B	N/A 1/8" Male NPT	N/A 1/8" Male NPT	N/A Viton®	N/A 5 psi	N/A Brass
COF-2M-5#-V-NI	N/A 1/8" Male NPT	N/A 1/8" Male NPT	N/A Viton®	N/A 5 psi	N/A Nickel Plated

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Item #

Inlet

Outlet

Seal

Cracking Pressure

Body Material