Y-Pattern Check Valves | McMaster-Carr

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132 Products

High-Flow Threaded Check Valves

To achieve the maximum possible flow, internal components are designed to reduce flow resistance. These valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.

Bronze Body


	Repair Kit for 125 Pressure Class	Repair Kit for 200 and 300 Pressure Classes

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.

Repair Kits—Repair kits include everything you need to rebuild the valve.

	Check Valves															Repair Kits
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each	For Pressure Class	For Pipe Size		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 125



		1/4	3.3	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	2 1/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K51	000000	125	1/4	4708K25	000000


		3/8	6	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	2 1/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K52	00000	125	3/8	4708K31	00000
		1/2	10	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	2 5/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K53	00000	125	1/2	4708K24	00000
		3/4	18	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	2 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K54	00000	125	3/4	4708K29	00000
		1	31	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	3 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K55	000000	125	1	4708K21	00000
		1 1/4	54	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	3 9/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K56	000000	125	1 1/4	4708K23	00000
		1 1/2	76	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K57	000000	125	1 1/2	4708K22	000000
		2	131	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	4 3/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4708K58	000000	125	2	4708K26	000000
		2 1/2	192	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	6"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4708K59	000000	125	2 1/2	4708K27	000000
		3	297	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	6 7/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4708K61	000000	125	3	4708K28	000000


		NPT Female Inlet × NPT Female Outlet—Pressure Class 150



				1/4	2.3	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9773K51	00000	—	—	———	0


				3/8	4.3	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9773K52	00000	—	—	———	0
				1/2	7.2	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	2 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K53	00000	—	—	———	0
				3/4	13	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	3"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K54	000000	—	—	———	0
				1	22	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	3 11/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K55	000000	—	—	———	0
				1 1/4	39	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K56	000000	—	—	———	0
				1 1/2	56	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	4 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K57	000000	—	—	———	0
				2	92	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	5 7/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9773K58	000000	—	—	———	0
				2 1/2	150	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	7"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9773K59	000000	—	—	———	0
				3	240	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	7 7/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9773K61	00000000	—	—	———	0


				NPT Female Inlet × NPT Female Outlet—Pressure Class 200



						1/4	2.3	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K61	000000	200, 300	1/4	9770K115	00000


						3/8	4.3	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K62	000000	200, 300	3/8	9770K121	00000
						1/2	7.2	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	2 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K63	000000	200, 300	1/2	9770K114	00000
						3/4	13	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	3"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K64	000000	200, 300	3/4	9770K119	00000
						1	22	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	3 11/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K65	000000	200, 300	1	9770K111	00000
						1 1/4	39	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K66	000000	200, 300	1 1/4	9770K113	000000
						1 1/2	56	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	4 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K67	000000	200, 300	1 1/2	9770K112	000000
						2	92	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	5 7/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K68	000000	200, 300	2	9770K116	000000
						2 1/2	150	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	7"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K69	00000000	200, 300	2 1/2	9770K117	000000


						NPT Female Inlet × NPT Female Outlet—Pressure Class 300



								1/4	2.3	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K71	000000	200, 300	1/4	9770K115	00000


								3/8	4.3	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	2 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K72	000000	200, 300	3/8	9770K121	00000
								1/2	7.2	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	2 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K73	000000	200, 300	1/2	9770K114	00000
								3/4	13	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	3"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K74	000000	200, 300	3/4	9770K119	00000
								1	22	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	3 11/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K75	000000	200, 300	1	9770K111	00000
								1 1/4	39	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K76	000000	200, 300	1 1/4	9770K113	000000
1 1/2								56	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	4 5/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K77	000000	200, 300	1 1/2	9770K112	000000
2	92							600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	5 7/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K78	000000	200, 300	2	9770K116	000000
2 1/2	150							600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	7"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K79	00000000	200, 300	2 1/2	9770K117	000000

316 Stainless Steel Body

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

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	For Use With	Disc Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class Not Rated



	1/4	11	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K62	000000


	3/8	11	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K63	00000
	1/2	21	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K64	00000
	3/4	63	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 15/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K65	00000
	1	106	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	3 9/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K66	00000
	1 1/4	189	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 1/8"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K67	000000
	1 1/2	264	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 11/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K68	000000
	2	449	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	5 7/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K69	000000
	2 1/2	660	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	6 1/8"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K71	000000
	3	1,047	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	7 5/16"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K72	000000

Check Valves with Solder-Socket Fittings

Solder these valves to copper tubing for a permanent, leak-tight connection. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Bronze Body

Image of Product. Front orientation. Check Valves. Check Valves with Solder-Socket Fittings.

	For Tube OD	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each
Solder Socket × Solder Socket—Pressure Class 125



	1/4	3/8"	1.3	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	2 1/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K12	000000


	3/8	1/2"	2.5	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	2 1/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K14	00000
	1/2	5/8"	4.8	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	2 9/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K16	000000
	3/4	7/8"	14.3	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	3 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K18	000000
	1	1 1/8"	24	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	4 1/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K22	000000
	1 1/2	1 5/8"	60	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	5 1/4"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K26	000000
	2	2 1/8"	102	200 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	6 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Steam, Water	Bronze	Bronze	9782K28	000000

High-Cycling Threaded Check Valves

With few moving parts to wear out, these valves withstand frequent opening and closing, pulsating flow, and rapid flow reversal. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Bronze Body

Image of Product. Front orientation. Check Valves. High-Cycling Threaded Check Valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 125



	1/2	2.87	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	2 3/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Brass	4894K47	0000000


	3/4	5.24	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	2 1/2"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K12	000000
	1	8.86	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	3 1/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K13	000000
	1 1/4	15.67	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	3 5/8"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K14	000000
	1 1/2	21.83	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	3 7/8"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K15	000000
	2	37.84	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	4 11/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K16	000000


	NPT Female Inlet × NPT Female Outlet—Pressure Class 300



			1/2	2.87	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	2 9/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K81	000000


			3/4	5.24	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	3"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K82	000000
			1	8.86	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	3 1/2"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K83	000000
			1 1/4	15.67	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	4 1/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K84	000000
			1 1/2	21.83	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	4 5/8"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K85	000000
			2	37.84	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	5 3/4"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K86	000000

Clear-View Socket-Connect Check Valves for Harsh Chemicals

Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. Valves have a PVC body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

PVC Body

Image of Product. Front orientation. Check Valves. Clear-View Socket-Connect Check Valves for Harsh Chemicals.

	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Piston Material	Seal Material		Each
Socket Connect × Socket Connect



	1/2	40, 80	6.7	150 psi @ 70° F	0.29	35 to 140	Clear	5 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol (Methyl Alcohol), Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water	PVC	Fluoroelastomer	4754K42	000000


	3/4	40, 80	11.9	150 psi @ 70° F	0.29	35 to 140	Clear	6 5/16"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol (Methyl Alcohol), Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water	PVC	Fluoroelastomer	4754K43	00000
	1	40, 80	21	150 psi @ 70° F	0.29	35 to 140	Clear	6 7/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol (Methyl Alcohol), Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water	PVC	Fluoroelastomer	4754K44	00000

Socket-Connect Check Valves for Oil and Fuel

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. These heavy duty valves can withstand pressures up to 1,975 psi and temperatures up to 800° F. They open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.

Steel Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Oil and Fuel.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class 800



	3/4	2.69	1,975 psi @ 100° F	34	-20 to 800	3 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Gasoline, Natural Gas, Oil	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K84	0000000


	1	5.08	1,975 psi @ 100° F	45	-20 to 800	4 3/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Gasoline, Natural Gas, Oil	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K85	000000
	2	22.34	1,975 psi @ 100° F	80	-20 to 800	6 13/16"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Gasoline, Natural Gas, Oil	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K88	000000

Steel Body—Spring-Loaded Ball

Spring-loaded ball check valves resist sticking and clogging better than spring-loaded piston check valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Ball Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class 800



	3/4	2.69	1,975 psi @ 100° F	57	-20 to 800	3 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K82	0000000


	1	5.08	1,975 psi @ 100° F	107	-20 to 800	4 3/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K83	000000
	2	22.34	1,975 psi @ 100° F	527	-20 to 800	6 13/16"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K86	000000

Clear-View Socket-Connect Check Valves

Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. They have a removable cap that provides easy access to internal components for maintenance.

PVC Body

	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Piston Material	Seal Material		Each
Socket Connect × Socket Connect



	1/2	40, 80	6.7	150 psi @ 70° F	0.29	35 to 140	Clear	5 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K52	000000


	3/4	40, 80	11.9	150 psi @ 70° F	0.29	35 to 140	Clear	6 5/16"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K53	00000
	1	40, 80	21	150 psi @ 70° F	0.29	35 to 140	Clear	6 7/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K54	00000
	1 1/2	40, 80	49	150 psi @ 70° F	0.29	35 to 140	Clear	8 1/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K56	000000
	2	40, 80	77	150 psi @ 70° F	0.29	35 to 140	Clear	8 7/8"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K57	000000
	3	40, 80	168	150 psi @ 70° F	0.29	35 to 140	Clear	12 1/4"	Any Angle, Horizontal, Vertical	Removable Cap	ASTM D1784, ASTM D1785	Air, Water	PVC	EPDM	4754K58	000000

Socket-Connect Check Valves

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. The valve body is 316 stainless steel for excellent corrosion resistance. A removable cap provides easy access to internal components for maintenance.

316 Stainless Steel Body

Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class 200



	1/4	4.2	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K51	000000


	3/8	5.5	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K52	00000
	1/2	7	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 9/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K53	00000
	3/4	16	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	2 15/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K54	000000
	1	30	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	3 9/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K55	000000
	1 1/4	49	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 1/8"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K56	000000
	1 1/2	72	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 11/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K57	000000
	2	130	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	5 7/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K58	000000
	2 1/2	280	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	6 1/8"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K59	000000
	3	390	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	7 5/16"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K61	000000

High-Performance Threaded Check Valves for Fuel

These heavy duty valves can withstand pressures up to 1,975 psi and temperatures up to 800° F. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Steel Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. High-Performance Threaded Check Valves for Fuel.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 800



	1/2	1.53	1,975 psi @ 100° F	32	-20 to 800	3 1/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K63	000000


	3/4	2.69	1,975 psi @ 100° F	34	-20 to 800	3 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K64	000000
	1	5.08	1,975 psi @ 100° F	45	-20 to 800	4 3/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K65	000000
	1 1/4	8.96	1,975 psi @ 100° F	45	-20 to 800	4 3/4"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K66	000000
	1 1/2	14.09	1,975 psi @ 100° F	63	-20 to 800	6"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K67	000000
	2	22.34	1,975 psi @ 100° F	80	-20 to 800	6 3/4"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K68	000000

Steel Body—Spring-Loaded Ball

Spring-loaded ball check valves resist sticking and clogging better than spring-loaded piston check valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Ball Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 800



	1/2	1.53	1,975 psi @ 100° F	57	-20 to 800	3 1/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K71	0000000


	3/4	2.69	1,975 psi @ 100° F	57	-20 to 800	3 5/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K72	000000
	1	5.08	1,975 psi @ 100° F	107	-20 to 800	4 3/8"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K73	000000
	1 1/4	8.96	1,975 psi @ 100° F	267	-20 to 800	4 3/4"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K74	000000
	1 1/2	14.1	1,975 psi @ 100° F	527	-20 to 800	6"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K75	000000
	2	22.34	1,975 psi @ 100° F	527	-20 to 800	6 13/16"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K76	000000

Plastic Socket-Connect Check Valves

Also known as backwater valves, these valves prevent backflow of sewage and wastewater in drain, waste, and vent systems. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. Valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.

PVC Body—Swing


	Replacement Flappers

	Check Valves															Replacement Flappers
	Pipe Size	For Pipe Schedule	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Features	For Use With	Pressure Class	Disc Material	Seal Material		Each		Each
Socket Connect × Socket Connect



		1 1/2	40	Not Rated	0	35 to 140	White	4 3/16"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K13	000000	4670K31	000000


		2	40	Not Rated	0	35 to 140	White	4 1/2"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K15	00000	4670K31	00000
		3	40	Not Rated	0	35 to 140	White	7 5/16"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K17	00000	4670K32	0000
		4	40	Not Rated	0	35 to 140	White	9 3/4"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K19	00000	4670K33	00000
		6	40	Not Rated	0	35 to 140	White	15 3/16"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K23	00000	4670K34	00000