Cast Iron Pressure Regulators

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	Body Material Body Material

Iron

	Housing Material Housing Material

Iron

	For Use With For Use With

	Outlet Pipe Size Outlet Pipe Size

	Inlet Pipe Size Inlet Pipe Size

	Maximum Inlet Pressure Maximum Inlet Pressure

	Valve Type Valve Type

Back-Pressure Regulator

Pop Safety

Pressure Regulator

	Inlet Thread Type Inlet Thread Type

NPT

	Valve Function Valve Function

Pressure Regulation

Pressure Relief

Back-Pressure Regulation

	Outlet Thread Type Outlet Thread Type

NPT

	Shape Shape


Straight	90° Elbow

	Seal Material Seal Material

	Inlet Connection Type Inlet Connection Type

	Pipe

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

-49° to -25° F

-24° to 0° F

Greater than 0° F

	Outlet Connection Type Outlet Connection Type

	Pipe

	Inlet Connection Style Inlet Connection Style

Threaded

	Inlet Gender Inlet Gender

Female

Male

	Activation Activation

Pressure Driven

	Inlet Location Inlet Location

Side

Bottom

	Flow Coefficient (Cv) Flow Coefficient (Cv)

	Outlet Pressure Adjustment Method Outlet Pressure Adjustment Method

Screw

	Outlet Gender Outlet Gender

Female

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64 Products

About Pressure-Relief Valves

For Use With: Water, Oil, Air, Inert Gas
Temperature Range: See Table

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 strainers trap debris.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Temperature Range	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each
NPT Female
Cast Iron Body—Buna-N Diaphragm and Seal with Internal Strainer
1/4	Side	200	1/4	Side	32° to 180° F	3"	2 to 25, 20 to 60, 20 to 100, 50 to 150	0000000	0000000
3/8	Side	200	3/8	Side	32° to 180° F	3 7/8"	2 to 30, 20 to 70, 40 to 110, 90 to 150	0000000	000000
1/2	Side	200	1/2	Side	32° to 180° F	4 1/2"	2 to 30, 10 to 50, 30 to 125, 50 to 125	0000000	000000
3/4	Side	200	3/4	Side	32° to 180° F	5 1/8"	2 to 20, 10 to 35, 30 to 75, 50 to 110, 105 to 125	0000000	000000
1	Side	200	1	Side	32° to 180° F	5 7/8"	2 to 20, 10 to 45, 20 to 60, 55 to 100, 90 to 125	0000000	000000
1 1/4	Side	200	1 1/4	Side	32° to 180° F	6 3/4"	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 150	0000000	000000
1 1/2	Side	200	1 1/2	Side	32° to 180° F	6 3/4"	2 to 15, 10 to 30, 20 to 50, 45 to 100, 90 to 125	0000000	000000
2	Side	200	2	Side	32° to 180° F	9 1/4"	2 to 20, 10 to 60, 20 to 100, 90 to 125	0000000	000000
Cast Iron Body—Fluoroelastomer Diaphragm and 420 Stainless Steel Seal
3/8	Side	250	3/8	Side	32° to 300° F	4 1/4"	0 to 10, 10 to 50, 40 to 100, 100 to 200	0000000	000000
1/2	Side	250	1/2	Side	32° to 300° F	3 5/8"	0 to 10, 10 to 50, 40 to 100, 100 to 200	0000000	000000
3/4	Side	250	3/4	Side	32° to 300° F	3 5/8"	0 to 10, 10 to 50, 40 to 100, 100 to 200	0000000	000000
1	Side	250	1	Side	32° to 300° F	4 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000
2	Side	250	2	Side	32° to 300° F	6 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000

Pressure-Regulating Valves for Steam

For Use With: Steam
Temperature Range: -20° to 400° F

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 strainers trap debris.

For technical drawings and 3-D models, click on a part number.

Valves
Inlet			Outlet						Repair Kits
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each		Each
NPT Female
Cast Iron Body—Bronze Diaphragm and 420 Stainless Steel Seal
1/2	Side	250	1/2	Side	3 5/8"	0 to 10, 10 to 50, 100 to 200, 40 to 100	0000000	0000000	0000000	000000
3/4	Side	250	3/4	Side	3 5/8"	0 to 10, 10 to 50, 100 to 200, 40 to 100	0000000	000000	0000000	00000
1	Side	250	1	Side	4 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000	0000000	000000
1 1/4	Side	250	1 1/4	Side	4 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000	0000000	000000
1 1/2	Side	250	1 1/2	Side	6 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000	0000000	000000
2	Side	250	2	Side	6 1/2"	0 to 10, 10 to 30, 30 to 50, 40 to 85	0000000	000000	0000000	000000
Cast Iron Body—Bronze Diaphragm and PTFE Seal with Internal Strainer
1/4	Side	150	1/4	Side	3"	2 to 25, 20 to 60, 30 to 100, 50 to 125	0000000	000000	000000	00
3/8	Side	150	3/8	Side	3 7/8"	2 to 30, 20 to 100, 50 to 125	0000000	000000	000000	00
1/2	Side	150	1/2	Side	4 1/2"	10 to 50, 2 to 30, 30 to 125, 50 to 125	0000000	000000	0000000	000000
3/4	Side	150	3/4	Side	5 1/8"	10 to 35, 105 to 125, 2 to 20, 30 to 75, 50 to 110	0000000	000000	0000000	000000
1	Side	150	1	Side	5 7/8"	10 to 45, 2 to 20, 20 to 60, 55 to 100, 90 to 125	0000000	000000	0000000	000000
1 1/4	Side	150	1 1/4	Side	6 3/4"	10 to 30, 2 to 15, 20 to 50, 45 to 100, 90 to 125	0000000	000000	0000000	000000
1 1/2	Side	150	1 1/2	Side	6 3/4"	10 to 30, 2 to 15, 20 to 50, 45 to 100, 90 to 125	0000000	000000	0000000	000000
2	Side	150	2	Side	9 1/4"	10 to 60, 2 to 20, 20 to 100, 90 to 125	0000000	000000	0000000	000000

High-Accuracy Pressure-Regulating Valves for Steam

For Use With: Steam
Temperature Range: 40° to 450° F

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 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 (sold separately) include replacement seals, diaphragm, spring, and spring assembly.

For technical drawings and 3-D models, click on a part number.

Valves
Inlet			Outlet					Repair Kits
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Choose an Outlet Pressure Range, psi		Each		Each
NPT Female
Cast Iron Body—301 Stainless Steel Diaphragm and 420 Stainless Steel Seal
1/2	Side	250	1/2	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	000000000	0000000	0000000
3/4	Side	250	3/4	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	00000000	0000000	000000
1	Side	250	1	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	00000000	0000000	000000
1 1/4	Side	250	1 1/4	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	00000000	0000000	000000
1 1/2	Side	250	1 1/2	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	00000000	0000000	000000
2	Side	250	2	Side	3 to 20, 5 to 50, 10 to 100, 20 to 150	0000000	00000000	0000000	000000

Back-Pressure-Regulating Valves for Water and Oil

For Use With: Water, Oil
Temperature Range: -40° to 200° F

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.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet		Relief Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each
NPT Female
Cast Iron Body—Nickel Alloy Diaphragm and Brass Seal
1/2	Side	400	1/2	Side	1/2	Bottom	2 7/8"	0 to 25, 5 to 50, 30 to 100, 75 to 175, 150 to 400	0000000	0000000
1 1/4	Side	400	1 1/4	Side	1 1/4	Bottom	4 1/4"	20 to 85, 40 to 125, 50 to 230, 175 to 380, 300 to 400	0000000	00000000
1 1/2	Side	400	1 1/2	Side	1 1/2	Bottom	5"	10 to 55, 30 to 100, 40 to 200, 125 to 300, 200 to 400	0000000	00000000
2	Side	400	2	Side	2	Bottom	5"	10 to 55, 30 to 100, 40 to 200, 125 to 300, 200 to 400	0000000	00000000

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

For Use With: Air, Inert Gas
Temperature Range: -20° to 406° F

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.

For technical drawings and 3-D models, click on a part number.

Inlet			Relief Port
Pipe Size	Location	Maximum Pressure, psi	Pipe Size	Location	Temperature Range, ° F	Overall Ht.	Test Mechanism	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and NPT Female Relief Port
Cast Iron Body—Bronze Seal
2	Bottom	60	2	Side	-20° to 406°	7"	T-Handle	Pop Safety	2, 4, 6, 8, 10, 12, 14	0000000	0000000
2 1/2	Bottom	60	2 1/2	Side	-20° to 406°	8"	T-Handle	Pop Safety	2, 4, 6, 8, 10, 12, 14	0000000	000000
3	Bottom	60	3	Side	-20° to 406°	9"	T-Handle	Pop Safety	2, 4, 6, 8, 10, 12, 14	0000000	000000

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

For Use With: Air, Inert Gas
Specifications Met: ASME BPVC.VIII
Temperature Range: -20° to 406° F

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.

For technical drawings and 3-D models, click on a part number.

Inlet			Relief Port
Pipe Size	Location	Maximum Pressure, psi	Pipe Size	Location	Overall Ht.	Test Mechanism	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and NPT Female Relief Port
Cast Iron Body—Bronze Seal
2	Bottom	60	2	Side	7"	T-Handle	Pop Safety	16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60	0000000	0000000
2 1/2	Bottom	60	2 1/2	Side	8"	T-Handle	Pop Safety	16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60	0000000	000000
3	Bottom	60	3	Side	9"	T-Handle	Pop Safety	16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60	0000000	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.

For technical drawings and 3-D models, click on a part number.

Inlet/Outlet Connection		Relief Connection		O'all
Pipe Size	Dash Size	Pipe Size	Dash Size	Lg.	Wd.	Ht.	Choose a Set Pressure Range, psi		Each
NPT Female Inlet and Relief Port
Cast Iron Body
3/4	12	1/4	04	5 7/8"	3 3/4"	7 1/8"	100 to 1000, 500 to 2000, 1000 to 3000	000000	0000000

Rotary Feeders for Powder and Bulk Material

Transfer dry material from storage containers into air-powered conveyors and other pressurized systems. As the rotor’s eight vanes turn, the pockets between the vanes fill with material from the inlet and then dispense material through the outlet. Controlled by a built-in electric motor, this movement delivers bulk material in a controlled manner while maintaining pressure differential between the inlet and outlet. The rectangular flanges have standard bolt holes, so these feeders fit into most air-powered systems. Included neoprene gaskets are sized to fit the flanges to form a tight seal. To calculate the fixed displacement rate needed for your application, divide your material movement (lbs./hr.) by product density (lbs./cu. ft.).

Rotary Feeders

Rotary Feeder

		Overall			Inlet		Outlet		Shaft		Keyway
Fixed Displacement Rate, cu. in./rev.	Manufacturer Model Number	Lg.	Wd.	Ht.	Lg.	Wd.	Lg.	Wd.	Dia.	Lg.	Wd.	Dp.	Key Included	Max. Temp., °F	Max. Pressure, psi	Voltage		Each
Polyurethane-Coated Cast Iron
207	PAV6	27 1/4"	21 1/16"	16 3/4"	6"	6"	6"	6"	1"	2 1/2"	0.25"	0.125"	Yes	500°	12	230V/460V AC	0000000	000000000
414	PAV8	27 1/4"	23 1/16"	16 3/4"	8"	8"	8"	8"	1 3/16"	3"	0.25"	0.125"	Yes	500°	12	230V/460V AC	0000000	00000000
732	PAV10	27 1/4"	25 3/4"	16 3/4"	10"	10"	10"	10"	1 7/16"	3 1/2"	0.375"	0.188"	Yes	500°	12	230V/460V AC	0000000	00000000

Replacement Parts Kits

Replacement Parts Kit

For Manufacturer Model Number	Includes		Each
PAV6	Bearings, Nuts, Retainer, Screws, Springs	0000000	0000000
PAV8	Bearings, Nuts, Retainer, Screws, Springs	0000000	000000
PAV10	Bearings, Nuts, Retainer, Screws, Springs	0000000	000000

Terms and Conditions and Privacy Policy

About Pressure-Relief Valves

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

Pressure-Regulating Valves for Steam

High-Accuracy Pressure-Regulating Valves for Steam

Back-Pressure-Regulating Valves for Water and Oil

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

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

Pressure-Regulating Inline Hydraulic Valves

Rotary Feeders for Powder and Bulk Material

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

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

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