Cast Iron Pressure Regulators

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Body Material

Material

Inlet Pipe Size

For Use With

Outlet Pressure

Pipe Size

Outlet Pipe Size

Maximum Inlet Pressure

Less than 500 psi

Valve Function

Back-Pressure Regulation

Maximum Temperature

Valve Type

Back-Pressure Regulator

Maximum Pressure

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi to 3,999 psi

Set Pressure

Shape

Thread Type

Inlet Thread Type

Seal Material

Inlet Connection

Outlet Thread Type

Actuation

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Yes

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

Relief Port Pipe Size

65 Products

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

Pressure-Regulating Valves for Steam

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

Internal Strainer—Internal strainers trap debris.

	Valves												Repair Kits
	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		Each
NPT Female







				Cast Iron Body—Bronze Diaphragm and 420 Stainless Steel Seal

				1/2	Side	250	1/2	Side	Screw	3 5/8"	Steam	-20 to 400	0 to 10 , 10 to 50 , 40 to 100 , 100 to 200	9796K38	0000000	9796K96	000000


				3/4	Side	250	3/4	Side	Screw	3 5/8"	Steam	-20 to 400	0 to 10 , 10 to 50 , 40 to 100 , 100 to 200	9796K39	000000	9796K96	00000
				1	Side	250	1	Side	Screw	4 1/2"	Steam	-20 to 400	0 to 10 , 10 to 30 , 30 to 50 , 40 to 85	9796K91	000000	9796K97	000000
				1 1/4	Side	250	1 1/4	Side	Screw	4 1/2"	Steam	-20 to 400	0 to 10 , 10 to 30 , 30 to 50 , 40 to 85	9796K92	000000	9796K97	000000
				1 1/2	Side	250	1 1/2	Side	Screw	6 1/2"	Steam	-20 to 400	0 to 10 , 10 to 30 , 30 to 50 , 40 to 85	9796K93	000000	9796K99	000000
				2	Side	250	2	Side	Screw	6 1/2"	Steam	-20 to 400	0 to 10 , 10 to 30 , 30 to 50 , 40 to 85	9796K94	000000	9796K99	000000




						Cast Iron Body—Bronze Diaphragm and PTFE Seal with Internal Strainer

						1/4	Side	150	1/4	Side	Screw	3"	Steam	-20 to 400	2 to 25 , 20 to 60 , 30 to 100	4674K61	000000	———	0


						3/8	Side	150	3/8	Side	Screw	3 7/8"	Steam	-20 to 400	2 to 30 , 20 to 70 , 90 to 150	4674K62	000000	———	0
						1/2	Side	150	1/2	Side	Screw	4 1/2"	Steam	-20 to 400	2 to 30 , 10 to 50 , 30 to 125 , 50 to 150	4674K63	000000	4674K91	000000
						3/4	Side	150	3/4	Side	Screw	5 1/8"	Steam	-20 to 400	2 to 20 , 10 to 35 , 30 to 75 , 50 to 110 , 105 to 150	4674K64	000000	4674K92	000000
						1	Side	150	1	Side	Screw	5 7/8"	Steam	-20 to 400	2 to 20 , 10 to 45 , 20 to 60 , 55 to 100 , 90 to 150	4674K65	000000	4674K93	000000
						1 1/4	Side	150	1 1/4	Side	Screw	6 3/4"	Steam	-20 to 400	2 to 15 , 10 to 30 , 20 to 50 , 45 to 100 , 90 to 150	4674K66	000000	4674K94	000000
						1 1/2	Side	150	1 1/2	Side	Screw	6 3/4"	Steam	-20 to 400	2 to 15 , 10 to 30 , 20 to 50 , 45 to 100 , 90 to 150	4674K67	000000	4674K94	000000
						2	Side	150	2	Side	Screw	9 1/4"	Steam	-20 to 400	2 to 20 , 10 to 60 , 20 to 100 , 90 to 150	4674K68	00000000	4674K95	000000

Pressure-Regulating Inline Hydraulic Valves

When input pressure varies, use these valves to maintain a consistent pressure. They are often placed after a directional-control valve and before an actuator, such as a cylinder. They have an indicator/gauge port for the inlet and one for the outlet so you can monitor that output pressure remains steady.

	Inlet/Outlet Connection		Relief Connection				Overall
	Pipe Size	Dash Size	Pipe Size	Dash Size	Max. Flow Rate, gpm	Max. Pressure, psi	Lg.	Wd.	Ht.	For Use With	Choose a Set Pressure, psi		Each
NPT Female Inlet and Relief Port







				Cast Iron Body—Buna-N Seal

				3/4	12	1/4	04	33	3,000	5 7/8"	3 3/4"	7 1/8"	Hydraulic Fluid	100 to 1,000 , 500 to 2,000 , 1,000 to 3,000	9474T2	0000000

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

High-Accuracy Pressure-Regulating Valves for Steam

Control steam line pressure with ±1 psi accuracy. 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 cast iron body that absorbs vibration from pressure changes to reduce wear and noise in your pipeline. They meet ANSI/FCI 70-2 Class IV for tight shut-off (max. leakage rate of 0.01%). Install _1/4 NPT male pipe (not included) between the control valve and your downstream steam line.

Repair Kits—Repair kits (sold separately) include replacement seals, diaphragm, spring, and spring assembly.

	Valves												Repair Kits
	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	For Use With	Temp. Range, ° F	Specs. Met	Choose an Outlet Pressure, psi		Each		Each
NPT Female







				Cast Iron Body—301 Stainless Steel Diaphragm and 420 Stainless Steel Seal

				1/2	Side	250	1/2	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K19	000000000	9792K32	0000000


				3/4	Side	250	3/4	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K21	00000000	9792K33	000000
				1	Side	250	1	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K23	00000000	9792K34	000000
				1 1/4	Side	250	1 1/4	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K25	00000000	9792K35	000000
				1 1/2	Side	250	1 1/2	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K27	00000000	9792K36	000000
				2	Side	250	2	Side	Screw	Steam	40 to 450	ANSI/FCI 70-2 Class IV	3 to 20 , 5 to 50 , 10 to 100 , 20 to 150	9792K29	00000000	9792K37	00000000

Hydraulic Pressure-Relief Valves

Iron

To set the pressure, unscrew the cap and turn the adjustment screw. Valves begin opening at the set pressure and fully open at about 10% over the set pressure. They begin closing as pressure drops and close when the system pressure is restored below the set pressure.

Iron Body—Iron valves absorb vibration to reduce noise and wear in the pipeline.

	Inlet Connection		Relief Connection		Overall
	Pipe Size	Dash Size	Pipe Size	Dash Size	Lg.	Wd.	Ht.	Temp. Range, ° F	Choose a Set Pressure, psi		Each
NPT Female Inlet and NPT Female Relief Port







				Iron Body

				3/8	06	3/8	06	2 1/16"	1 3/8"	5 3/8"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K32	0000000


				1/2	08	1/2	08	2 3/16"	1 7/16"	6 3/16"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K11	000000
				3/4	12	3/4	12	2 11/16"	1 11/16"	6 15/16"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K12	000000
				1	16	1	16	3 5/16"	2 1/16"	8 1/4"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K13	000000
				1 1/4	20	1 1/4	20	3 13/16"	2 1/2"	9 9/16"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K14	000000
				1 1/2	24	1 1/2	24	4 1/8"	2 7/8"	11 1/16"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 300 to 500	4704K25	000000
				2	32	2	32	4 5/8"	3 1/4"	13"	-20 to 400	3 to 10 , 7 to 35 , 30 to 100 , 60 to 175 , 150 to 350 , 250 to 600	4704K26	000000

Large-Diameter Remote-Discharge Fast-Acting Pressure-Relief Valves for Air and Inert Gas

Commonly used with high-volume blowers, compressors, and air-powered conveyors, these valves quickly relieve a large amount of air in systems with a pipe size of 2 or greater. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Attach a drain line to the threaded relief port for remote discharge. Valves have a cast iron body to absorb vibration for reduced noise and wear in your pipeline.

NPT Male Inlet and NPT Female Relief Port

Image of Product. Front orientation. Pressure-Relief Valves. Large-Diameter Remote-Discharge Fast-Acting Pressure-Relief Valves for Air and Inert Gas.

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







			Cast Iron Body—Bronze Seal

			2	Bottom	60	2	Side	90° Elbow	7"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	2 , 4 , 6 , 8 , 10 , 12 , 14	8175K31	0000000


			2 1/2	Bottom	60	2 1/2	Side	90° Elbow	8"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	2 , 4 , 6 , 8 , 10 , 12 , 14	8175K33	000000
			3	Bottom	60	3	Side	90° Elbow	9"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	2 , 4 , 6 , 8 , 10 , 12 , 14	8175K35	00000000

Large-Diameter Remote-Discharge ASME-Code Fast-Acting Pressure-Relief Valves for Air and Inert Gas

These valves meet ASME Code Section VIII for use with air and inert gas pressure vessels. Commonly used with high-volume blowers, compressors, and air-powered conveyors, they quickly relieve a large amount of air in systems with a pipe size of 2 or greater. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Attach a drain line to the threaded relief port for remote discharge. Valves have a cast iron body to absorb vibration for reduced noise and wear in your pipeline.

NPT Male Inlet and NPT Female Relief Port

Image of Product. Front orientation. Pressure-Relief Valves. Large-Diameter Remote-Discharge ASME-Code Fast-Acting Pressure-Relief Valves for Air and Inert Gas.

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







			Cast Iron Body—Bronze Seal

			2	Bottom	60	2	Side	90° Elbow	7"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	ASME BPVC.VIII	16 , 18 , 20 , 22 , 24 , 26 , 28 , 30 , 32 , 34 , 36 , 38 , 40 , 42 , 44 , 46 , 48 , 50 , 52 , 54 , 56 , 58 , 60	8175K32	0000000


			2 1/2	Bottom	60	2 1/2	Side	90° Elbow	8"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	ASME BPVC.VIII	16 , 18 , 20 , 22 , 24 , 26 , 28 , 30 , 32 , 34 , 36 , 38 , 40 , 42 , 44 , 46 , 48 , 50 , 52 , 54 , 56 , 58 , 60	8175K34	000000
			3	Bottom	60	3	Side	90° Elbow	9"	Air, Inert Gas	-20 to 406	T-Handle	Pop Safety	ASME BPVC.VIII	16 , 18 , 20 , 22 , 24 , 26 , 28 , 30 , 32 , 34 , 36 , 38 , 40 , 42 , 44 , 46 , 48 , 50 , 52 , 54 , 56 , 58 , 60	8175K36	00000000