Pressure-Relief Valves For Oil

Filter by

System of Measurement

Inlet Pipe Size

Outlet Pressure

Pipe Size

Body Material

Maximum Inlet Pressure

Less than 500 psi

500 psi to 999 psi

1,000 psi to 1,999 psi

2,000 psi to 3,999 psi

Inlet Thread Type

Outlet Pipe Size

Set Pressure

Material

Shape

Maximum Pressure

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi to 3,999 psi

Maximum Temperature

Thread Type

Valve Function

Back-Pressure Regulation

Pressure Regulation

Pressure Relief

Flow Coefficient (Cv)

Inlet Connection

Seal Material

Valve Type

Back-Pressure Regulator

Pressure Regulator

Relief

Relief Port Pipe Size

REACH

RoHS

Compliant with Exemptions

Not Compliant

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

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

71 Products

Compact Pressure-Relief Valves

Due to their small size, these valves are often installed on tanks in low-clearance areas. They begin opening at the set pressure. Nylon valves fully open at about 10% over the set pressure and steel valves fully open at about 50% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. All have a vent outlet to exhaust discharge directly. Set pressure is not adjustable.

Steel Body—For Grease and Oil

	Inlet							Each
	Pipe Size	Location	Max. Pressure, psi	Relief Port Location	Overall Ht.	Set Pressure		1-9	10-Up
NPTF Male Inlet and Relief Vent



		1/8	Bottom	5	Top	1/2"	1 psi	1093K1	00000	00000


		1/8	Bottom	15	Top	1/2"	7.5 psi	1093K2	0000	0000
		1/8	Bottom	25	Top	1/2"	15 psi	1093K3	0000	0000
		1/8	Bottom	80	Top	17/32"	45 psi	1093K4	0000	0000
		1/8	Bottom	140	Top	9/16"	80 psi	1093K53	0000	0000
		1/8	Bottom	200	Top	1/2"	100 psi	1093K64	0000	0000
		1/8	Bottom	650	Top	1/2"	400 psi	1093K65	0000	0000


		BSPT Male Inlet and Relief Vent



				1/8	Bottom	1	Top	1/2"	0.3 psi	1093K61	0000	0000


				1/8	Bottom	5	Top	1/2"	1 psi	1093K62	0000	0000
				1/8	Bottom	80	Top	1/2"	45 psi	1093K63	0000	0000

High-Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas

Image of Product. Front orientation. Contains Annotated. Pressure-Regulating Valves. High-Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas.

Withstand more than six times the inlet pressure of standard pressure-regulating valves. These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves have a 303 stainless steel body for corrosion resistance in harsh environments.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	Port-to-Port Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				303 Stainless Steel Body—PTFE Seal

				2	Side	3,000	2	Bottom	Screw	3"	Water, Oil, Air, Inert Gas	32 to 300	100 to 450, 250 to 1,200, 500 to 2,200	4256T16	000000000

Pressure-Relief Valves for Oil

These valves are often used in hydraulic and lubrication systems. They begin opening at the set pressure and fully open at about 10% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. Adjust the set pressure within the range.

NPT Male Inlet and NPT Female Relief Port

Image of Product. Front orientation. Pressure-Relief Valves. Pressure-Relief Valves for Oil.

Inlet			Relief
Pipe Size	Location	Max. Pressure, psi	Port Pipe Size	Port Location	Set Pressure Adjustment Method	Shape	Overall Ht.	For Use With	Temp. Range, ° F	Valve Type	Choose a Set Pressure, psi		Each







			Bronze Body—316 Stainless Steel Seal

			1/2	Bottom	1,400	3/4	Side	External Adjustment Screw	90° Elbow	7 1/4"	Oil	-320 to 420	Relief	15 to 75, 50 to 150, 100 to 300, 200 to 600, 600 to 900	4460K81	0000000


			3/4	Bottom	1,400	3/4	Side	External Adjustment Screw	90° Elbow	7 1/4"	Oil	-320 to 420	Relief	15 to 75, 50 to 150, 100 to 300	4460K82	000000
			1	Bottom	1,400	1	Side	External Adjustment Screw	90° Elbow	7 1/2"	Oil	-320 to 420	Relief	15 to 75, 50 to 150, 100 to 300, 200 to 600, 600 to 900	4460K83	000000
			1 1/4	Bottom	1,400	1 1/4	Side	External Adjustment Screw	90° Elbow	8"	Oil	-320 to 420	Relief	15 to 75, 50 to 150, 100 to 300, 200 to 600, 600 to 900	4460K84	000000
			1 1/2	Bottom	1,400	1 1/2	Side	External Adjustment Screw	90° Elbow	8 7/8"	Oil	-320 to 420	Relief	15 to 75, 50 to 150, 100 to 300, 200 to 600	4460K85	00000000

Back-Pressure-Regulating Valves for Water and Oil

Commonly used as bypass lines after centrifugal, reciprocating, and rotary pumps, these valves obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the threaded relief port. Adjust the set pressure within the range. Valves have a cast iron body that absorbs vibration from pressure changes to reduce wear and noise in your pipeline.

	Inlet			Outlet			Relief Port
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	Pipe Size	Location	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Cast Iron Body—Nickel Diaphragm and 303 Stainless Steel Seal

				1/2	Side	400	1/2	Side	Screw	1/2	Bottom	2 7/8"	Water, Oil	-40 to 200	0 to 25, 5 to 50, 30 to 100, 75 to 175, 150 to 400	4675K21	000000000


				1 1/4	Side	400	1 1/4	Side	Screw	1 1/4	Bottom	4 1/4"	Water, Oil	-40 to 200	20 to 85, 40 to 125, 50 to 230, 175 to 380, 300 to 400	4675K25	00000000
				1 1/2	Side	400	1 1/2	Side	Screw	1 1/2	Bottom	5"	Water, Oil	-40 to 200	10 to 55, 30 to 100, 40 to 200, 125 to 300, 200 to 400	4675K26	00000000
				2	Side	400	2	Side	Screw	2	Bottom	5"	Water, Oil	-40 to 200	10 to 55, 30 to 100, 40 to 200, 125 to 300, 200 to 400	4675K27	00000000

Vibration-Damping Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas

A cast iron body absorbs vibration from pressure changes to reduce wear and noise in your pipeline. These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.

Internal Strainer—Internal strainers trap debris.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Cast Iron Body—Buna-N Diaphragm and Seal with Internal Strainer

				1/4	Side	200	1/4	Side	Screw	3"	Water, Oil, Air, Inert Gas	32 to 180	2 to 25, 20 to 60	4674K41	0000000


				3/8	Side	200	3/8	Side	Screw	3 7/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 20 to 70, 40 to 110, 90 to 150	4674K42	000000
				1/2	Side	200	1/2	Side	Screw	4 1/2"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 10 to 50, 30 to 125, 50 to 125	4674K43	000000
				3/4	Side	200	3/4	Side	Screw	5 1/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 35, 30 to 75, 50 to 110, 105 to 125	4674K44	000000
				1	Side	200	1	Side	Screw	5 7/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 45, 20 to 60, 55 to 100, 90 to 125	4674K45	000000
				1 1/4	Side	200	1 1/4	Side	Screw	6 3/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 150	4674K46	000000
				1 1/2	Side	200	1 1/2	Side	Screw	6 3/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 125	4674K47	000000
				2	Side	200	2	Side	Screw	9 1/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 60, 20 to 100, 90 to 125	4674K48	00000000




						Cast Iron Body—Fluoroelastomer Diaphragm and 420 Stainless Steel Seal

						3/8	Side	250	3/8	Side	Screw	4 1/4"	Water, Oil, Air, Inert Gas	32 to 300	0 to 10, 10 to 50, 40 to 100, 100 to 200	9796K11	000000


						1/2	Side	250	1/2	Side	Screw	3 5/8"	Water, Oil, Air, Inert Gas	32 to 300	0 to 10, 10 to 50, 40 to 100, 100 to 200	9796K12	000000
						3/4	Side	250	3/4	Side	Screw	3 5/8"	Water, Oil, Air, Inert Gas	32 to 300	0 to 10, 10 to 50, 40 to 100, 100 to 200	9796K13	000000
						1	Side	250	1	Side	Screw	4 1/2"	Water, Oil, Air, Inert Gas	32 to 300	0 to 10, 10 to 30, 30 to 50, 40 to 85	9796K14	000000
						2	Side	250	2	Side	Screw	6 1/2"	Water, Oil, Air, Inert Gas	32 to 300	0 to 10, 10 to 30, 30 to 50, 40 to 85	9796K15	000000

Long-Life Back-Pressure-Regulating Valves for Water and Oil

Image of Product. Front orientation. Contains Annotated. Pressure-Regulating Valves. Long-Life Back-Pressure-Regulating Valves for Water and Oil.

For a longer service than cast iron valves, these have a durable bronze body and a 303 stainless steel seal. Commonly installed as bypass lines after centrifugal, reciprocating, and rotary pumps, they obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the outlet. Adjust the set pressure within the range.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	Port-to-Port Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Bronze Body—303 Stainless Steel Seal

				1/4	Bottom	600	1/4	Side	Screw	1 1/4"	Water, Oil	-40 to 450	15 to 30, 25 to 75, 50 to 140, 100 to 300, 200 to 600	4662K46	0000000


				3/8	Bottom	600	3/8	Side	Screw	1 1/4"	Water, Oil	-40 to 450	15 to 30, 25 to 75, 50 to 140, 100 to 300, 200 to 600	4662K48	000000
				1/2	Bottom	600	1/2	Side	Screw	1 5/8"	Water, Oil	-40 to 450	15 to 75, 50 to 150, 100 to 300, 200 to 600	4662K32	000000
				3/4	Bottom	600	3/4	Side	Screw	1 5/8"	Water, Oil	-40 to 450	15 to 75, 50 to 150, 100 to 300, 200 to 600	4662K34	000000
				1	Bottom	600	1	Side	Screw	2 1/4"	Water, Oil	-40 to 450	15 to 75, 50 to 150, 100 to 300, 200 to 600	4662K36	000000
				1 1/4	Bottom	600	1 1/4	Side	Screw	2 1/4"	Water, Oil	-40 to 450	15 to 75, 50 to 150, 100 to 300, 200 to 600	4662K38	000000

Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas


Valves with Buna-N Diaphragm	Valves with Buna-N Diaphragm and Gauge Port	Valves with Neoprene Diaphragm	Valves with Neoprene Diaphragm and Gauge Port

These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.

Neoprene Diaphragm—Valves with a neoprene diaphragm have higher flow rates than valves with a Buna-N diaphragm.

Internal Strainer—Internal strainers trap debris.

Pressure-Regulating Valves with 1/4 NPT Gauge Port—Gauge ports let you attach a pressure gauge to monitor outlet pressure.

	Inlet			Outlet						Pressure-Regulating Valves		Pressure-Regulating Valves with 1/4 NPT Gauge Port
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each		Each
NPT Female







				Brass Body—Buna-N Diaphragm and Seal with Internal Strainer

				1/4	Side	250	1/4	Side	2 1/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 10 to 50, 25 to 90, 80 to 120, 100 to 180	4677K51	0000000	4677K61	0000000


				3/8	Side	250	3/8	Side	2 1/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 10 to 50, 25 to 90, 80 to 120, 100 to 180	4677K55	000000	4677K65	000000




						Brass Body—Neoprene Diaphragm and Buna-N Seal

						1/4	Side	400	1/4	Side	2 1/2"	Water, Oil, Air, Inert Gas	32 to 180	0 to 5, 2 to 35, 20 to 70, 60 to 125, 75 to 200, 100 to 250	5022K21	000000	5022K41	000000


						3/8	Side	400	3/8	Side	2 1/2"	Water, Oil, Air, Inert Gas	32 to 180	0 to 5, 2 to 35, 20 to 70, 60 to 125, 75 to 200, 100 to 250	5022K23	000000	5022K43	000000
						1/2	Side	400	1/2	Side	2 7/8"	Water, Oil, Air, Inert Gas	32 to 180	0 to 5, 2 to 25, 20 to 60, 40 to 80, 75 to 125, 100 to 250	5022K25	000000	5022K45	000000

High-Temperature Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas

Rated for more than double the temperature of standard pressure-regulating valves, these can withstand temperatures up to 550° F. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves meet ANSI/FCI 70-2 Class IV for tight shut-off (max. leakage rate of 0.01%).

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Specs. Met	Choose an Outlet Pressure, psi		Each
NPT Female







				Steel Body—316 Stainless Steel Diaphragm and 303 Stainless Steel Seal

				1/2	Side	300	1/2	Side	Screw	3 5/8"	Water, Oil, Air, Inert Gas	32 to 550	ANSI/FCI 70-2 Class IV	2 to 23, 10 to 38, 20 to 55, 35 to 160, 95 to 220	46395K21	000000000


				3/4	Side	300	3/4	Side	Screw	3 5/8"	Water, Oil, Air, Inert Gas	32 to 550	ANSI/FCI 70-2 Class IV	2 to 23, 10 to 38, 20 to 55, 35 to 160, 95 to 220	46395K23	00000000
				1	Side	300	1	Side	Screw	4 3/16"	Water, Oil, Air, Inert Gas	32 to 550	ANSI/FCI 70-2 Class IV	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	46395K25	00000000
				1 1/2	Side	300	1 1/2	Side	Screw	4 13/16"	Water, Oil, Air, Inert Gas	32 to 550	ANSI/FCI 70-2 Class IV	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	46395K27	00000000
				2	Side	300	2	Side	Screw	5 1/2"	Water, Oil, Air, Inert Gas	32 to 550	ANSI/FCI 70-2 Class IV	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	46395K29	00000000

Long-Life Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas

For a longer service life than brass and cast iron valves, these have a durable bronze body. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. All valves have an internal strainer to trap debris.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Bronze Body—Buna-N Diaphragm and Seal with Internal Strainer

				1/4	Side	400	1/4	Side	Screw	3"	Water, Oil, Air, Inert Gas	32 to 180	2 to 25, 20 to 60, 20 to 100, 50 to 150	47345K11	0000000


				3/8	Side	400	3/8	Side	Screw	3 7/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 20 to 70, 40 to 110, 90 to 150	47345K12	000000
				1/2	Side	400	1/2	Side	Screw	4 1/2"	Water, Oil, Air, Inert Gas	32 to 180	2 to 30, 10 to 50, 30 to 125, 50 to 150	47345K13	000000
				3/4	Side	400	3/4	Side	Screw	5 1/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 35, 30 to 75, 50 to 110, 105 to 150	47345K14	000000
				1	Side	400	1	Side	Screw	5 7/8"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 45, 20 to 60, 55 to 100, 90 to 150	47345K15	000000
				1 1/4	Side	400	1 1/4	Side	Screw	6 3/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 150	47345K16	00000000
				1 1/2	Side	400	1 1/2	Side	Screw	6 3/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 150	47345K17	00000000
				2	Side	400	2	Side	Screw	9 1/4"	Water, Oil, Air, Inert Gas	32 to 180	2 to 20, 10 to 60, 20 to 100, 90 to 150	47345K18	00000000

Corrosion-Resistant Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas

Image of Product. Front orientation. Pressure-Regulating Valves. Corrosion-Resistant Pressure-Regulating Valves for Water, Oil, Air, and Inert Gas.

Often used in wet conditions and harsh environments, these valves have a 316 stainless steel body for excellent corrosion resistance. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				316 Stainless Steel Body—Buna-N Diaphragm and Seal

				1/2	Side	720	1/2	Side	Screw	4 1/2"	Water, Oil, Air, Inert Gas	32 to 200	2 to 30, 10 to 50, 30 to 125, 50 to 150	8099K11	000000000


				3/4	Side	720	3/4	Side	Screw	5 1/8"	Water, Oil, Air, Inert Gas	32 to 200	2 to 20, 10 to 35, 30 to 75, 50 to 110, 105 to 150	8099K21	00000000
				1	Side	720	1	Side	Screw	5 7/8"	Water, Oil, Air, Inert Gas	32 to 200	2 to 20, 10 to 45, 20 to 60, 55 to 100, 90 to 150	8099K31	00000000

Low-Pressure Aluminum Quick-Connect Pipe Fittings

Twist these fittings onto aluminum pipe for quick, sealed connections—no threading, soldering, or welding necessary. Use them to build a compressed air system in half the time it would take to build a copper or steel system. Also known as Unipipe fittings, they’re part of a quick-connect system that’s compatible with pipe from Unipipe, Transair, and Infinity.

Finger tighten the collar on the end of these fittings, then use a wrench for the final quarter turn. The inside of these fittings has a compression ring and O-ring to seal against the pipe. They’re easy to take apart as needed to modify your setup.

Plugs

Quick-Connect

Female

Plugs block the end of a fitting. They include a ¼ BSPP valve that can be used to exhaust your line or attach a pressure gauge. To install, remove the fitting's nut, collar, and grip ring. Insert the plug into the fitting, slide the collar on, and tighten the nut. Discard the connector's grip ring.

	For Pipe OD
	(A)	(B), mm	Material	Max. Pressure @ Temp.		Each
Quick-Connect Female



		1/2"	20	Epoxy-Coated 6061 Aluminum	1,015 psi @ 72° F	5314N61	000000


		1"	25	Epoxy-Coated 6061 Aluminum	1,015 psi @ 72° F	5314N62	00000
		1 1/2"	40	Epoxy-Coated 6061 Aluminum	1,015 psi @ 72° F	5314N63	00000

Wrenches

For Pipe OD	Drive Size, mm	Overall Lg., mm	Head Thk., mm	Finished Material		Each
3/4"	20	172	5	Galvanized Steel	5314N81	000000
1"	25	192	5	Galvanized Steel	5314N82	00000
1 1/2"	40	245	5	Galvanized Steel	5314N83	00000