2 Check Valves | McMaster-Carr

Filter by

Pipe Size

Body Material

Fitting Connection

For Use With

Methyl Ethyl Ketone (MEK)

Mounting Position

Material

Pressure Class

Gender

Check Valve Type

Seal Material

Thread Type

Pipe Schedule

Actuation

Disc Material

Minimum Opening Pressure

Connects To

Maximum Pressure @ Temperature

End-to-End Length

Valve Type

Reduced Pressure Zone

Shape

For Flange Class

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

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

58 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



		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	0000000	125	2	4708K26	0000000


		NPT Female Inlet × NPT Female Outlet—Pressure Class 150



				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


				NPT Female Inlet × NPT Female Outlet—Pressure Class 200



						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


						NPT Female Inlet × NPT Female Outlet—Pressure Class 300



								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

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



	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	0000000

Threaded Check Valves

These valves open to allow flow in one direction and close when flow stops or reverses.

Connectors, NPT Female Inlet × NPT Female Outlet


Female Inlet × Female Outlet	Flared Angle Connector

Nickel-Plated Brass Body—Nickel-plated brass valves are more corrosion resistant than plain brass or bronze valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Spring Material	Seal Material	End-to-End Lg.	For Use With		Each
Brass Body—Buna-N Spring-Loaded Piston



	2	52	400 psi @ 70° F	—	2	35 to 225	302 Stainless Steel	Buna-N	5 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon	7746K862	0000000


	Brass Body—304 Stainless Steel Spring-Loaded Piston



			2	64	400 psi @ 70° F	125 psi @ 350° F	2	35 to 350	302 Stainless Steel	303 Stainless Steel	5 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon	4753K47	000000


			Nickel-Plated Brass Body—304 Stainless Steel Spring-Loaded Piston



					2	64	400 psi @ 70° F	125 psi @ 350° F	2	35 to 350	302 Stainless Steel	303 Stainless Steel	5 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon	4753K57	000000


					Bronze Body—PTFE Spring-Loaded Ball



							2	81	400 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	Stainless Steel	PTFE	6"	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	47715K28	000000

Adapters, NPT Male Inlet × NPT Female Outlet


Male Inlet × Female Outlet	Flared Angle Adapter

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Spring Material	Seal Material	End-to-End Lg.	For Use With		Each
Bronze Body—PTFE Spring-Loaded Ball



	2	81	400 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	Stainless Steel	PTFE	6 1/2"	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	47715K48	0000000

Easy-Install Threaded Check Valves for Harsh Chemicals

To reduce installation time and allow for maintenance without detaching pipe connections, these valves have union fittings. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Ball


Assembled View	Exploded View

PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.

For Drinking Water—Valves for drinking water meet NSF/ANSI 61.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	Food Industry Std.	For Use With	Ball Material	Seal Material		Each
NPT Female × NPT Female



	2	130	150 psi @ 70° F	1	40 to 140	Dark Gray	8 1/8"	Horizontal, Vertical	ASTM D1784	NSF/ANSI 61	Citric Acid, Diesel Fuel, Drinking Water, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	PVC	Fluoroelastomer	4721K18	0000000

CPVC Body—Ball


Assembled View	Exploded View

PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.

For Drinking Water—Valves for drinking water meet NSF/ANSI 61.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	Food Industry Std.	For Use With	Ball Material	Seal Material		Each
NPT Female × NPT Female



	2	130	150 psi @ 70° F	1	35 to 190	Light Gray	8 1/8"	Horizontal, Vertical	ASTM D1784	NSF/ANSI 61	Citric Acid, Diesel Fuel, Drinking Water, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	CPVC	Fluoroelastomer	4810K36	0000000

Polypropylene Body—Ball


Assembled View	Exploded View

Polypropylene valves are more corrosion resistant than PVC or CPVC valves.

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



	2	130	150 psi @ 70° F	1	35 to 160	White	8 1/8"	Horizontal, Vertical	ASTM D4101	Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), Water	Polypropylene	Fluoroelastomer	4851K45	0000000

Flanged Check Valves

Bolt these valves to ANSI flanges. 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.

Cast Iron Body

Image of Product. Front orientation. Check Valves. Flanged 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	Flange OD	No. of Bolt Holes	Bolt Hole Size	Bolt Circle Dia.	Bolts Included	Includes	Specs. Met	For Use With	Disc Material	Seal Material		Each
Flanged × Flanged—Pressure Class 125



	2	110	200 psi @ 70° F	125 psi @ 353° F	1	-20 to 405	8"	Horizontal	6"	4	5/8"	4 3/4"	No	Removable Cap	ASTM A126 Class B, MSS SP-71	Air, Steam, Water	Bronze	Bronze	8200T11	0000000

Socket-Connect Check Valves for Harsh Chemicals

Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves have a plastic body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. 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	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class Not Rated



	2	40, 80	65	150 psi @ 70° F	2	40 to 140	Dark Gray	7 5/8"	Horizontal, Vertical	ASTM D1784	Citric Acid, Deionized Water, Diesel Fuel, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	PVC	PVC	Fluoroelastomer	1939N6	0000000

CPVC Body—Spring-Loaded Piston

	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class Not Rated



	2	40, 80	65	150 psi @ 70° F	2	40 to 190	Light Gray	7 5/8"	Horizontal, Vertical	ASTM D1784	Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	CPVC	CPVC	Fluoroelastomer	1939N16	0000000

High-Temperature Threaded Check Valves

The heat-resistant rubber seal withstands temperatures up to 500° F. These valves open to allow flow in one direction and close when flow stops or reverses.

Bronze Body—Poppet


1 1/2 to 3 Pipe Size Bronze	Repair Kit for 1 1/2 to 3 Pipe Size Bronze Valves and 303 Stainless Steel Valves

Use bronze valves when corrosion is not a concern.

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

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



		2	59	400 psi @ 70° F	1	0 to 500	5 9/16"	Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon	302 Stainless Steel	Fluoroelastomer	7295N112	0000000	2	7295N126	000000

303 Stainless Steel Body—Poppet


	Repair Kit for 1 1/2 to 3 Pipe Size Bronze Valves and 303 Stainless Steel Valves

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

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

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



		2	52	600 psi @ 70° F	1	0 to 500	5 9/16"	Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon	302 Stainless Steel	Fluoroelastomer	7295N121	0000000	2	7295N126	000000

Socket-Connect Check Valves for Drinking Water

Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves meet NSF/ANSI 61, which means they’re safe to use with drinking water. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.

											White
	Pipe Size	For Pipe Schedule	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect



		2	40	200 psi @ 70° F	0.5	35 to 140	7"	Drinking Water	PVC	302 Stainless Steel	EPDM	46835K57	000000

PVC Body—Swing

Swing check valves create less flow resistance than spring-loaded piston check valves.

Clear—Clear valves let you visually inspect flow and debris accumulation.

										White		Clear
	Pipe Size	For Pipe Schedule	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Disc Material	Seal Material		Each		Each
Socket Connect × Socket Connect



		2	40	125 psi @ 70° F	0.5	35 to 140	6"	Drinking Water	EPDM	EPDM	45275K57	000000	6274T97	000000

Flange-Mount Check Valves for Oil and Fuel

Install these valves between ANSI flanges. ANSI flanges are sold separately. All valves open to allow flow in one direction and close when flow stops or reverses. Body is 316 stainless steel for excellent corrosion resistance.

316 Stainless Steel Body


Shown with Flanges (Not Included)

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



	2	48	1,440 psi @ 70° F	1.25	-20 to 1,000	2 3/8"	Horizontal, Vertical	150, 300, 600	API Std 594, API Std 598	Butane, Diesel Fuel, Fuel Oil, Gasoline, Kerosene, Natural Gas, Oil, Propane	316 Stainless Steel	316 Stainless Steel	7767K31	0000000

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



	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	0000000

Sump Pump Backflow-Prevention Valves with Clamps

Prevent dirty water from flowing back to your pump. Valves have flexible couplers with hose clamps to slip over PVC tubing for easy installation. At least 2 psi is required to open valves. Install for horizontal or upward flow.

Pipe Size	Max. Pressure @ Temp.	Max. Flow Rate @ 10 ft. of Head, gpm	Temp. Range, ° F	Body Material	Color	Seal Material	End-to-End Lg.		Each
2	25 psi @ 70° F	4.3	35 to 130	ABS	Green	EPDM/Stainless Steel	6"	7744K12	000000

Flange-Mount Check Valves

Sandwich these valves between two ANSI flanges for backflow prevention at a fraction of the weight of flanged check valves and a reduced pipeline footprint. ANSI flanges are sold separately. All valves open to allow flow in one direction and close when flow stops or reverses.

Cast Iron Body


Shown with Flanges (Not Included)

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Flange Class	For Use With	Disc Material	Seal Material		Each
Flanged × Flanged



	2	60	200 psi @ 70° F	1.25	-20 to 250	2 1/8"	Horizontal, Vertical	125	Air, Argon, Helium, Krypton, Neon, Water, Xenon	Bronze	Buna-N	5023K31	000000

Threaded Check Valves for Vacuum

Prevent vacuum loss with these airtight, leakproof valves. They open to allow flow in one direction and close when flow stops or reverses.

Anodized Aluminum Body

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Vacuum Rating, in. Hg	For Use With	Ball Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet



	2	63	230 psi @ 200° F	0.17	0 to 200	5"	Any Angle, Horizontal, Vertical	0.35	Air	Acetal	Stainless Steel	Buna-N	1878N4	0000000

Compact Flange-Mount Check Valves

Less than half the end-to-end length of standard flange-mount check valves, these can be installed between ANSI flanges in pipelines with limited clearance. ANSI flanges are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. All have a 316 stainless steel body for excellent corrosion resistance.

316 Stainless Steel Body—Spring-Loaded Piston


Shown with Flanges (Not Included)

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



	2	32	720 psi @ 100° F	0.5	-10 to 400	1/4"	Any Angle, Horizontal, Vertical	150, 300	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	316 Stainless Steel	Viton® Fluoroelastomer	1969N16	0000000

Threaded Check Valves for Drinking Water

These valves meet NSF/ANSI 61 for drinking water service. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.

										White
	Pipe Size	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Piston Material	Spring Material	Seal Material		Each
NPT Female × NPT Female



		2	200 psi @ 70° F	0.5	35 to 140	7"	Drinking Water	PVC	302 Stainless Steel	EPDM	46835K37	000000

PVC Body—Swing

Swing check valves create less flow resistance than spring-loaded piston check valves.

Clear—Clear valves let you visually inspect flow and debris accumulation.

									White		Clear
	Pipe Size	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Disc Material	Seal Material		Each		Each
NPT Female × NPT Female



		2	125 psi @ 70° F	0.5	35 to 140	6"	Drinking Water	EPDM	EPDM	45275K47	000000	6274T87	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



		2	40	60 psi @ 140° F	0	35 to 140	White	4 1/2"	Horizontal	Removable Cap	Water	Not Rated	PVC	PVC	4670K14	000000	4670K31	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



	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	0000000

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



	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	0000000

Check Valves for Steam

To withstand high pressures and temperatures in steam service applications, these valves have a 316 stainless steel body, PTFE ball, and PTFE seal. They open to allow flow in one direction and close when flow stops or reverses.

316 Stainless Steel Body—Spring-Loaded Ball


	Repair Kits

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

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



		2	81	125 psi @ 350° F	0.5	-5 to 350	6"	Horizontal, Vertical	Steam	PTFE	316 Stainless Steel	PTFE	47885K78	0000000	2	47885K18	0000000

Butt-Weld Check Valves

Weld these valves to unthreaded pipe for a smooth, flush connection that provides maximum flow. All open to allow flow in one direction and close when flow stops or reverses. They have a 316 stainless steel body for excellent corrosion resistance.

316 Stainless Steel Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. Butt-Weld Check Valves.

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



	2	40	32	1,500 psi @ 100° F	0.5	-10 to 400	4 3/8"	Any Angle, Horizontal, Vertical	ASME B16.25	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	316 Stainless Steel	Viton® Fluoroelastomer	1971N16	0000000

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



	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	0000000


	NPT Female Inlet × NPT Female Outlet—Pressure Class 300



			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

Heavy Duty Threaded Check Valves for Drinking Water

For more durability than plastic, these valves have a metal body. They meet NSF/ANSI 61 for drinking water service. All open to allow flow in one direction and close when flow stops or reverses.

Brass Body—Spring-Loaded Piston

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



	2	60.7	400 psi @ 170° F	0.5	10 to 210	3 5/8"	Any Angle, Horizontal, Vertical	NSF/ANSI 61	Drinking Water	PEI	302 Stainless Steel	Buna-N	8517T28	0000000

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

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

	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



	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	0000000

Floor Drain Check Valves

Image of Product. Front orientation. Drain Check Valves.

Put an end to water damage from backed-up sewers. To install, place a valve into your floor drain pipe and tighten the screws—the rubber collar will expand for proper fit. When water backs up, the rubber float will rise to seal off the drain. When water recedes, the float will drop for normal drainage.

For Pipe Size		Each
2	2495K12	000000

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



	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	0000000

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



	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	0000000

Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water


Dual Check	Reduced Pressure Zone

Integral shutoff valves isolate flow for inline maintenance, and a top-entry cover provides easy access to internal components. These valves meet NSF/ANSI 61 for use with drinking water. For maximum protection from system contamination, they consist of a primary check valve and a secondary check valve. If the first check fails to close when flow stops or reverses, the secondary check valve engages to prevent backflow. A strainer prevents debris from blocking the check valves.

Reduced Pressure Zone—Reduced-pressure-zone valves have a relief valve that discharges backflow if both check valves fail.

Air Inlet—Valves with an air inlet provide high-capacity relief in emergency conditions. If both check valves fail, the inlet introduces air to quickly displace liquid for faster discharge through the relief valve.

	Temp. Range, ° F	End-to-End Lg.	Features	Specs. Met	Food Industry Std.	Certification	For Use With	Seal Material		Each
Bronze Body—Dual Check







	NPT Female Inlet × NPT Female Outlet

	2	175 psi @ 180° F	30	35 to 180	24 13/16"	Strainer	ASSE 1015	NSF/ANSI 61	CSA Certified, USC Foundation Approved	Drinking Water	Buna-N	4775K65	000000000


	Bronze Body—Reduced Pressure Zone







					NPT Female Inlet × NPT Female Outlet

					2	175 psi @ 180° F	30	35 to 180	26 11/16"	Relief Valve, Strainer	ASSE 1013	NSF/ANSI 61	USC Foundation Approved	Drinking Water	Buna-N	45265K45	00000000




							NPT Male Inlet × NPT Male Outlet

							2	175 psi @ 140° F	30	35 to 140	25 15/16"	Air Inlet, Relief Valve, Strainer	ASSE 1013	NSF/ANSI 61	USC Foundation Approved	Drinking Water	Buna-N	4777K84	00000000

Flanged Check Valves for Harsh Chemicals

Bolt these valves to ANSI flanges. The glass-filled vinyl ester body and PTFE seal stand up to a wide range of harsh chemicals. Valves open to allow flow in one direction and close when flow stops or reverses.

Glass-Filled Vinyl Ester Body—Ball

Image of Product. Front orientation. Check Valves. Flanged Check Valves for Harsh Chemicals.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	For Flange Class	Flange OD	No. of Bolt Holes	Bolt Hole Size	Bolt Circle Dia.	Bolts Included	Specs. Met	For Use With	Ball Material	Seal Material		Each
Flanged × Flanged



	2	54	140 psi @ 250° F	1	-40 to 250	Beige	7"	Vertical	150	6"	4	3/4"	4 3/4"	No	ASME B16.10, ASME B16.5	Ammonia, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Fuel Oil, Gasoline, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Oil, Phosphoric Acid, Salt Water, Soap Solutions, Toluene (Methylbenzene), Water, Xylene	PTFE	PTFE	1869N3	0000000

Vacuum Breakers for Chemicals

A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

Spring-Loaded Piston Check Valve

								Material				PVC Body
	Inlet Pipe Size	Outlet Pipe SIze	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	End-to-End Lg.	Seal	Piston	Spring	For Use With	Temp. Range, ° F	Color		Each
NPT Female Inlet × NPT Female Outlet



		2	2	80	Not Rated	100 psi @ 75° F	1	8 1/2"	Fluoroelastomer	PVC	Polymer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 140	Gray	1868N17	0000000

Union-Insert Check Valves

To reduce installation time and allow for maintenance without detaching pipe connections, these valves insert into a union fitting. Union fittings are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. Body is 316 stainless steel for excellent corrosion resistance.

316 Stainless Steel Body—Spring-Loaded Piston


Shown with Union Fitting (Sold Separately)

	Check Valves														Valve Union Fittings
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each		Each
NPT Female Inlet × NPT Female Outlet



		2	33.3	1,500 psi @ 70° F	0.5	-10 to 400	1 9/16"	Horizontal, Vertical	ASTM A479	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	316 Stainless Steel	Fluoroelastomer	8615T44	0000000	8615T64	0000000

Pipeline Flame Arresters

To prevent flashback in flammable gas pipelines, an internal flame-arresting element absorbs the heat from a fire to extinguish the flame. These valves are commonly used in pilot lines connected to waste gas burners.

	End-to-End Lg.	For Use With	Flame-Arresting Element Material		Each
Aluminum Body







	NPT Female

	2	25 psi @ 176° F	176	4 3/4"	Butane, Natural Gas, Propane	316 Stainless Steel	4717K36	0000000

Vacuum Breakers

Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

90° Elbow

Elbows are designed for intermittent flow. They discharge liquid directly and should not be installed in areas where spillage could cause damage.

								Brass Body
	Inlet Pipe Size	Outlet Pipe SIze	Max. Pressure @ Temp.	Temp. Range, ° F	Port-to-Port Lg.	Seal Material	For Use With		Each
NPT Female Inlet × NPT Female Outlet



		2	2	125 psi @ 70° F	35 to 180	2 3/4"	Silicone Rubber	Water	47685K48	0000000

Arresters for Flammable Vapors

Minimize fire hazard from flammable vapors. Mount an arrester to your vent pipe to stop flames from traveling back into your tank. If the ambient temperature reaches 165° F, the fusible links melt, and the cover closes to block flames from the arrester.

Replacement Fusible Links—To reuse the arrester, replace the fusible links (sold separately).

Flame Arresters							Replacement Fusible Links
Pipe Size	Thread Type	Gender	Material	Certification		Each		Each
2	NPT	Female	Aluminum, Cast Iron	UL Listed	1206K81	000000000	1206K85	000000