Overview
Spirax Sarco pressure reducing and surplussing valves are used on steam, compressed air, gas and industrial liquid systems when the application needs stable local pressure control either downstream of the valve or upstream of the valve. Pressure reducing valves lower pressure at the point of use so each process can run at its preferred condition, which can reduce downstream equipment cost, limit flash steam losses and give operators more flexibility across changing plant duties. Surplussing or back pressure valves hold a minimum upstream pressure or relieve excess upstream pressure where process stability depends on maintaining pressure before the valve rather than after it. On saturated steam systems, pressure reduction also changes steam temperature, so stable valve performance supports repeatable thermal control as well as pressure control. A complete pressure control station usually includes more than the valve alone. Separators, strainers, isolating valves, gauges and safety valves all help protect the station and support reliable commissioning, maintenance and downstream equipment protection. The wider range includes self-acting, pilot-operated, direct-acting, stainless steel and actuated solutions, making it easier to match compact point-of-use duties, sanitary applications and more demanding process conditions without forcing one regulator style into every role.
Related pressure-control routes
Pressure-control projects usually extend beyond one regulator alone. If the duty changes from local pressure reduction into signal-driven modulation, compare steam control valves. Where station reliability depends on cleaner trim protection upstream, add strainers and steam separators.
If the same application also needs packaged hygienic pressure management, continue into sanitary pressure reducing valves.
Spirax Sarco 25P Pressure Reducing Valve
The Spirax Sarco 25P is positioned as a pilot-operated pressure reducing valve for steam duties where users already know the model and want a clearer route into pressure station selection than the broader family page alone provides.
Spirax Sarco BRV2S Direct Acting Pressure Reducing Valve
BRV2S is positioned as a compact direct acting Spirax Sarco pressure reducing valve for steam and compressed air duties where users already know the model and need a clearer route into product review, replacement planning and station design checks.
Spirax Sarco DP27 Pressure Reducing Valve
DP27 is a pilot-operated Spirax Sarco pressure reducing valve with ductile iron construction. Product documentation covers DP27, DP27E, DP27G, DP27GY, DP27R and DP27Y variants for model review, replacement planning and enquiry checks.
Continue your pressure control selection
Pressure reducing valves are rarely selected in isolation. Most projects also need the correct station ancillaries, pressure protection and adjacent control hardware.
Compare wider pressure control options
Go back to the wider control systems range when you need to compare pressure reducing valves with control valves, actuators and self-acting temperature control options.
Protect downstream equipment correctly
Pressure reducing stations often need downstream overpressure protection. Use this route when you also need to assess safety valve selection for the same duty.
Support the full pressure reducing station
A robust pressure reducing station also relies on clean steam, correct drainage and protected trim. Review upstream strainers and filters when valve reliability matters.