API Std 598 Check Valves

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24 Products

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)—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 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


	2 1/2	90	1,440 psi @ 70° F	1.25	-20 to 1,000	2 5/8"	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	7767K32	000000
	3	171	1,440 psi @ 70° F	1.25	-20 to 1,000	2 7/8"	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	7767K33	000000
	4	291	720 psi @ 70° F	1.25	-20 to 1,000	2 7/8"	Horizontal, Vertical	150, 300	API Std 594, API Std 598	Butane, Diesel Fuel, Fuel Oil, Gasoline, Kerosene, Natural Gas, Oil, Propane	316 Stainless Steel	316 Stainless Steel	7767K34	000000
	6	705	275 psi @ 70° F	1.25	-20 to 1,000	3 7/8"	Horizontal, Vertical	150	API Std 594, API Std 598	Butane, Diesel Fuel, Fuel Oil, Gasoline, Kerosene, Natural Gas, Oil, Propane	316 Stainless Steel	316 Stainless Steel	7767K36	00000000
	8	1,795	275 psi @ 70° F	1.25	-20 to 1,000	5"	Horizontal, Vertical	150	API Std 594, API Std 598	Butane, Diesel Fuel, Fuel Oil, Gasoline, Kerosene, Natural Gas, Oil, Propane	316 Stainless Steel	316 Stainless Steel	7767K37	00000000

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

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