API · ASME · DIN · EN standard industrial valves
Steam Pressure Reducing Valves
Steam pressure reducing valves drop live or saturated steam from a high-pressure header to the steady lower pressure that equipment, tracing and heating stations actually use, holding the outlet constant while the boiler side swings. The range covers ductile iron or WCB bodies with 2Cr13 discs, SS410/2Cr13 seats, plugs and stems, a 321 stainless steel diaphragm and an adjustable UNS G92600 / 1Cr18Ni9Ti spring, DN15 to DN200 (1/2" to 8") at 2.5 to 4.0 MPa nominal with a 3.75 MPa body test, delivering outlet pressures of 0.02 to 1.6 MPa. Selection turns on the inlet-to-outlet drop, the Cv the load demands, and diaphragm and spring temperature capability for the steam condition.
Part of the Pressure Reducing Valves family
Last updated: 2026-11
Family specifications
| size range | 1/2" to 8" |
|---|---|
| size range | 1/2 - 8 Inch, DN15-DN200 |
| size range | 1/2-20 Inch, DN15-DN500 |
| size range | 1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4" |
| pressure class | 2.5 to 4.0MPa |
| pressure class | PN10, PN16, Class 150 LB |
| outlet pressure range | 0.02 - 1.6 MPa |
| min differential | ≥ 0.15 MPa |
| max inlet pressure | 2.5 MPa |
| max inlet pressure | up to 450 PSIG |
| body materials | Ductile Iron, WCB |
| seat materials | SS410, 2Cr13 |
| temperature range | -198 - +593°C |
| end connections | Flanged, butt-welded, socket-welded, threaded |
| end connections | RF |
| end connections | NPT, 150# FLG, 300# FLG |
| disc materials | 2Cr13 |
| plug materials | SS410, 2Cr13 |
| stem materials | 2Cr13, SS410 |
| diaphragm materials | 321 S.S. |
| adjustable spring materials | UNS G92600, 1Cr18Ni9Ti |
| body test pressure | 3.75 MPa |
| sealing test pressure | 2.5 MPa |
| wS pressure | Class 150 - 600 LB, PN20-PN100 |
| wS body materials | ASTM A216 WCB, ASTM A217 WC6, ASTM A352 LCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M, ASTM A351 CF3 |
| wS leakage standard | ANSI/FC, IEC 60534-4 |
| wS flow direction | flow to open, flow to close |
| kV product name | Pilot Piston Pressure Reducing Valve |
| kV body material | ASTM A216 WCB |
| kV size | DN32, 1-1/4 Inch |
| kV pressure | PN16, Class 150 LB |
| kV seat and disc materials | 2Cr13 |
| kV cylinder liner materials | 2Cr13, Copper Alloy |
| kV piston material | Cast Iron |
| kV guide seat and stem materials | 2Cr13 |
| kV spring material | 1Cr18Ni9Ti |
| kV pilot main spring material | 50CrVA |
| kV adjusting spring material | 60Si12Mn |
| kV medium | Steam |
| kV body and bonnet materials | ASTM A216 WCB, A351 CF8, CF8M |
| kV connection types | RF Flange, Butt Welding |
| kV min outlet pressure | 0.1 MPa |
| mW type | Piston-Actuated Pilot-Operated Pressure Regulator |
| mW spring types | Double, Single |
| mW pressure sensing types | Internal, Remote |
| mW body material | Ductile Iron |
| mW seat and disc materials | Hardened 420 SS |
| mW internals | all stainless steel internals |
| mW fluid | Steam |
| mW example application | 12,500 lbs/hr of 300 PSIG Steam reduced to 125 PSIG |
| adjustable spring | UNS G92600, 1Cr18Ni9Ti |
| casing test pressure | 3.75 MPa |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What sizes and pressure ratings are available for steam pressure reducing valves?
The published size range is 1/2" to 8", and the published pressure ratings are 2.5 to 4.0MPa. Availability of a specific size and rating is confirmed at quotation.
What materials are steam pressure reducing valves available in?
The published specification lists body materials: Ductile Iron, WCB. Material availability for a specific size and rating is confirmed at quotation.
What should a quotation inquiry for steam pressure reducing valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination — anything missing is confirmed during quotation.
More in this family
Family
Pressure Reducing Valves
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Direct Acting Pressure Reducing Valves
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Pilot Operated Pressure Reducing Valves
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Water Pressure Reducing Valves
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Pressure Relief / Sustaining Valves
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