Pressure Reducing Valve

How Does a Pressure Reducing Valve Work?

A pressure reducing valve responds to changes on the downstream side of the system. A diaphragm or piston senses outlet pressure and works against an adjustable spring or pilot mechanism to control how far the valve opens.

When downstream pressure drops because demand increases, the valve opens further and allows more flow. As pressure rises toward the required setting, the valve moves toward the closed position and restricts flow. This continuous response helps keep outlet pressure within the required operating range without constant manual adjustment.

Pressure Reducing Valve Features

• Automatic control of downstream pressure

• Adjustable pressure setting for changing system requirements

• Stable response as flow demand increases or decreases

• Direct-acting and pilot-operated configurations

• Diaphragm or piston pressure-sensing arrangements

• Flanged, threaded and welded connection options

Pressure Reducing Valve Specifications

Specification	Available Configuration / Standard
Size Range	DN15-DN200
Pressure Rating	PN10, PN16, PN25, PN40, PN64, PN100; ASME Class 150-600
Material	Carbon Steel, Low-Temperature Carbon Steel, Alloy Steel, Stainless Steel, Duplex Steel, Super Duplex Steel
Grades	ASTM A216 WCB/WCC; ASTM A105; ASTM A352 LCB/LCC; ASTM A350 LF2; ASTM A217 WC6/WC9; ASTM A182 F11/F22; ASTM A351 CF8/CF8M/CF3/CF3M; ASTM A182 F304/F304L/F316/F316L; ASTM A995 4A/5A/6A; ASTM A182 F51/F53/F55
Seat / Seal Materials	Stainless Steel, PTFE, EPDM, NBR
End Connections	Flanged, Threaded, Butt Weld, Socket Weld
Operation	Direct Acting, Pilot Operated
Standards	ASME B16.34, ASME B16.5, ASME B16.25, API 598, ASSE 1003, NSF/ANSI 61, NSF/ANSI 372

Types of Pressure Reducing Valves

Type	Typical Use
Direct Acting Pressure Reducing Valve	A compact, self-contained arrangement for straightforward downstream pressure regulation.
Pilot Operated Pressure Reducing Valve	Used where higher flow capacity or closer pressure regulation is required as system demand changes.
Steam Pressure Reducing Valve	Designed for steam systems where supply pressure must be reduced before downstream equipment or process lines.
Water Pressure Reducing Valve	Used in water systems to maintain controlled downstream pressure and protect equipment from excessive supply pressure.

Showing all 6 products

Pressure Relief Valve

Pressure relief valves automatically discharge excess pressure to protect piping, vessels and process equipment.

DETAILS

Water Pressure Reducing Valve

Water Pressure Reducing Valve Body: WCB, CI, DI Disc: WCB, CI, DI Seat: Stainless Steel Piston: Stainless Steel Ring: Stainless Steel Sleeve: Stainless Steel Nominal Diameter: DN20 to DN200 Nominal Pressure: PN10, PN16, PN25, PN40, PN64 End Connection: Flanged Dimension PN16 Unit: mm DN L H1 H2 20 160 90 220 25 180 95 255 32 200 100 255 40 220 115 325 50 250 120 325 65 260 125 330 80 310 135 340 100 350 148 347 125 400 190 560 150 450 205 580 200 500 220 630

DETAILS

Float Control Valve

Float Control Valve Body: Ductile Iron, Cast Iron Disc: Ductile Iron, Cast iron Cover: Ductile Iron, Cast Iron Diaphragm: EPDM, Rubber Spring: Stainless Steel Seat: Ductile Iron, Cast iron Nominal Diameter: DN20 to DN200 Nominal Pressure: PN10, PN16, PN25, PN40, PN64 End Connection: Flanged Dimension PN10 Unit: mm DN L D D1 H H1 20 180 105 75 212 179 25 180 115 85 212 179 32 180 135 100 212 179 40 203 145 110 265 210 50 203 160 125 265 210 65 235 180 145 310 215 80 285 195 160 350 245 100 360 215 180 460 305 125 400 245 210 520 365 150 455 280 240 570 415 200 585 335 295 695 510  

DETAILS

Pressure Relief and Sustaining Valve

Pressure Relief and Sustaining Valve Body: WCB, CI, SS304, SS316 Disc: WCB, CI, SS304, SS316 Diaphragm: EPDM, NBR Pilot Valve: Brass, Stainless Steel Spring: Stainless Steel Shaft: Stainless Steel Nominal Diameter: DN50 to DN200 Nominal Pressure: PN16 to PN64 End Connection: Flanged, Buttweld, Socketweld Dimension PN16 Unit: mm DN L H H1 50 205 270 200 65 229 305 210 80 250 320 220 100 292 400 260 125 330 455 310 150 356 502 342 200 495 636 413  

DETAILS

Pilot Operated Pressure Reducing Valve

Pilot Operated Pressure Reducing Valve Body: Ductile Iron, Carbon Steel, Stainless Steel Seat: Stainless Steel O-Ring: NBR O-Ring: NBR Bolt: Stainless Steel (A2-70, A4) Bonnet: Iron, Stainless Steel Plug: Stainless Steel Bushing: Bronze Spring: Stainless Steel Nut: Stainless Steel (A2-70, A4) Plate: Iron Diaphragm: EPDM Disc Holder: Iron Seal: NBR Seat Retainer: Stainless Steel Stem: Stainless Steel Nominal Diameter: DN50 to DN200 Nominal Pressure: PN16 to PN64, Class150 to Class2500 End Connection: Flanged Dimension PN16 Unit: mm DN L фD фK N-фD 50 230 165 125 4-ф19 65 290 185 145 4-ф19 80 310 200 160 8-ф19 100 350 235 190 8-ф19 125 400 270 220 8-ф23 150 480 300 250 8-ф23 200 600 360 310 12-ф23  

DETAILS

Steam Pressure Reducing Valve

Steam Pressure Reducing Valve Nut: Stainless Steel Bolt: Stainless Steel Body: Carbon Steel, Ductile Iron, Stainless Steel Back Cover: Stainless Steel Disc: Stainless Steel Seal Ring: PTFE Cylinder Liner: Stainless Steel Piston: Stainless Steel O-Ring: NBR Cap: Stainless Steel Adjust Spring:Steel Cover: PVC Adjust Screw: Stainless Steel Nominal Diameter: DN15 to DN50 Nominal Pressure: PN16 to PN64 End Connection: Flanged Dimension PN16 Unit: mm DN L H H1 15 160 265 100 20 160 265 100 25 180 285 110 32 200 285 110 40 220 320 120 50 250 320 120  

DETAILS

Engineered for Performance. Manufactured for Reliability.

Industrial valves manufactured for durability, quality and reliable performance in demanding applications.

Request a Quote