Parker Check Valves | McMaster-Carr

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Fitting Connection

Threaded

Yor-Lok

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Tube OD

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Minimum Opening Pressure

Maximum Pressure @ Temperature

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For Use With

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Spring Material

Thread Type

UN/UNF (SAE Straight)

Mounting Position

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

REACH

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Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Maximum Temperature

End-to-End Length

Connection Port

Flow Coefficient (Cv)

20 Products

Check Valves with Yor-Lok Fittings

Two sleeves give these fittings extra gripping power. They bite into tubing as you tighten the nut to form a strong seal. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. Valves open to allow flow in one direction and close when flow stops or reverses.

Brass Body—Spring-Loaded Piston

Yor Lok Female Inlet ×

Yor Lok Female Outlet

Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Use With	Piston Material	Spring Material	Seal Material		Each
Yor-Lok Female Inlet × Yor-Lok Female Outlet



	1/8"	0.22	3,000 psi @ 70° F	1	-30 to 275	2 3/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T1	000000


	1/4"	0.75	3,000 psi @ 70° F	1	-30 to 275	2 1/2"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T2	00000
	3/8"	2.09	2,300 psi @ 70° F	1	-30 to 275	3 3/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T3	000000
	1/2"	3.3	2,200 psi @ 70° F	1	-30 to 275	4 1/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T4	000000
	3/4"	6.01	1,900 psi @ 70° F	1	-30 to 275	4 3/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T5	000000
	1"	6.56	1,500 psi @ 70° F	1	-30 to 275	4 5/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Brass	316 Stainless Steel	Buna-N	1056T6	000000

316 Stainless Steel Body—Spring-Loaded Piston


Yor Lok Female Inlet × Yor Lok Female Outlet	NPT Male Inlet × Yor Lok Female Outlet

316 stainless steel valves are more corrosion resistant than brass valves.

	For Tube OD	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Use With	Piston Material	Spring Material	Seal Material		Each
Yor-Lok Female Inlet × Yor-Lok Female Outlet



	—	1/8"	0.1	3,000 psi @ 70° F	0.33	-10 to 375	2 1/4"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K53	0000000


	—	1/4"	0.47	3,000 psi @ 70° F	0.33	-10 to 375	2 3/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K54	00000
	—	3/8"	1.47	2,300 psi @ 70° F	0.33	-10 to 375	2 1/2"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K55	000000
	—	1/2"	1.68	2,200 psi @ 70° F	0.33	-10 to 375	3"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K56	000000
	—	3/4"	4.48	1,900 psi @ 70° F	0.33	-10 to 375	3 1/2"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K59	000000
	—	1"	4.48	1,500 psi @ 70° F	0.33	-10 to 375	4 3/4"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K58	000000
	—	6 mm	0.47	3,000 psi @ 70° F	0.33	-10 to 375	2 3/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K41	000000
	—	10 mm	1.68	3,000 psi @ 70° F	0.33	-10 to 375	2 1/2"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K43	000000
	—	12 mm	1.68	3,000 psi @ 70° F	0.33	-10 to 375	3 1/16"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K44	000000


	NPT Male Inlet × Yor-Lok Female Outlet



			1/4	1/4"	0.47	3,000 psi @ 70° F	0.33	-10 to 375	2 1/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K45	000000


			3/8	3/8"	1.47	3,000 psi @ 70° F	0.33	-10 to 375	2 1/16"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K46	000000
			1/2	1/2"	1.68	3,000 psi @ 70° F	0.33	-10 to 375	2 7/8"	Any Angle, Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	302 Stainless Steel	Fluoroelastomer	45385K47	000000

Screw-In Hydraulic Check Valves

These hydraulic check valves open to allow flow in one direction and close when flow stops or reverses. Also known as cartridge valves, they screw into your mounting block.

Ball Check Valve

Image of Product. Front orientation. Hydraulic Check Valves. Screw-In Hydraulic Check Valves.

				Body—UN/UNF (SAE Straight)
	Deltrol Equivalent Model No.	Hydraforce Equivalent Model No.	Parker Equivalent Model No.	Thread Size	Dash Size	Max. Flow Rate, gpm	Flow Coefficient (Cv)	Max. Pressure, psi	Min. Opening Pressure, psi	Seal Material	Overall Ht.	Mounting Position		Each
Black Anodized Aluminum Body



		DCV-100-B-N-15	CV10-20-0-N-15	D04B2-1.0-N	7/8"-14	10	20	Not Rated	3,000	15	Buna-N	1 5/8"	Any Angle	1731N17	000000


		DCV-100-B-N-60	—	D04B2-2.1-N	7/8"-14	10	20	Not Rated	3,000	60	Buna-N	1 5/8"	Any Angle	1731N19	00000