What Is a Pressure Reducing Valve?
A pressure reducing valve (PRV) — also called a steam pressure regulator — automatically reduces a higher upstream steam pressure to a lower, stable downstream pressure regardless of flow demand or upstream pressure fluctuations. PRVs are essential in any steam distribution system where processes require a specific, lower pressure than the boiler generates.
PureSys India supplies PRVs for all steam applications. Browse pressure reducing valves including saturated steam PRVs and clean steam PRVs.
Why Use a PRV?
- Higher latent heat at lower pressure: Steam at lower pressure has more latent heat — improving heat transfer efficiency
- Equipment protection: Many heat exchangers, autoclaves, and process vessels are rated for lower pressures than the steam distribution header
- Safety: Reduces risk of equipment overpressure
- Energy saving: Running processes at the minimum required pressure reduces steam consumption
PRV Brands Supplied by PureSys India
Spirax Sarco PRVs
Spirax Sarco pressure reducing valves are among the most trusted in Indian industry. Available for both saturated steam and clean steam applications. Features include self-contained or pilot-operated designs, stainless steel trim, and tight set-point accuracy (±0.1 bar).
Valsteam ADCA PRVs
Valsteam ADCA PRVs offer excellent value with robust construction. Available for saturated steam and clean steam service. Pilot-operated models handle large flow variation with exceptional pressure stability.
Pureval PRVs
PureVal pressure reducing valves provide reliable steam pressure reduction for standard industrial applications at competitive prices — suitable for saturated steam and clean steam installations.
PRV Selection Criteria
- Inlet pressure (P1): Maximum upstream steam pressure
- Outlet pressure (P2): Required downstream pressure
- Flow capacity: Maximum steam flow rate (kg/h) at design conditions
- Connection size: Pipe DN size and connection type (flanged/screwed)
- Fluid type: Saturated steam, superheated steam, or clean steam
- Self-contained vs pilot-operated: Pilot-operated for large flow variation or tight regulation
Clean Steam PRVs
For pharmaceutical, food, and biotech applications where steam contacts the product, clean steam PRVs with full stainless steel wetted parts are required. PureSys India supplies clean steam PRVs meeting GMP and FDA sanitary requirements.
PRV Installation Best Practices
- Install a strainer upstream of the PRV to protect the seat and disc
- Install isolating valves either side for maintenance
- Install a safety valve downstream rated to outlet conditions
- Allow sufficient straight pipe downstream before fittings
Get Expert PRV Sizing
PureSys India’s engineers provide free PRV sizing calculations. Contact us with your inlet pressure, outlet pressure, and flow rate requirements.