Pressure reducing valve manufacturers in USA
SVR Global offers direct acting and pilot operated pressure reducing valves made from bronze, ductile iron, and cast steel constructions that maintain a pre set downstream pressure under various flow and inlet conditions. These pressure reducing valves are fabricated according to ASSE 1003 and ASME B16.34 standards and NSF/ANSI 61 for potable water use. The manufacturing process ensures material traceability for each individual valve produced.
How a Pressure Reducing Valve Works ?
The pressure reducing valve is a device that automatically reduces the higher inlet pressure to a lower outlet pressure that remains constant irrespective of changes in the inlet pressure or downstream demands.
The pressure reduction valve senses the outlet pressure with the help of either diaphragm or piston and opens or closes the outlet according to changes in outlet pressure.
This device is distinct from the pressure relief valve as the latter opens momentarily while the former works continuously to maintain the pressure level.
Types of Pressure reducing valve:
Direct Acting Pressure Reducing Valve
Float Control Valve
Pilot Operated Pressure Reducing Valve
Pressure Relief Valve
Steam Pressure Reducing Valve
Water Pressure Reducing Valve
Core Components:
Diaphragm or piston: the sensing element that responds to downstream pressure changes and repositions the valve
Main spring: sets the target downstream pressure; adjusting spring compression changes the set point
Seat and disc/plug: the sealing surfaces that throttle flow as the valve modulates
Pilot valve (pilot operated designs only): the small control valve that governs main valve movement based on sensed pressure
Strainer: typically installed upstream to protect the seat and pilot passages from debris
Direct Acting vs. Pilot Operated PRVs
Type | How It Regulates | Typical Range | Best Fit |
Direct acting | Spring force acting directly on the main diaphragm/piston | Smaller sizes, moderate pressure differentials | Residential and light commercial lines, simple installations |
Pilot operated | A small pilot valve senses downstream pressure and controls the main valve's opening | Larger sizes, wider pressure differentials | Industrial and municipal systems needing tighter regulation and higher flow capacity |
Materials and Trim Options:
Bronze and brass bodies: common in smaller water-service PRVs for potable and light commercial systems
Ductile iron and cast steel bodies: used in larger municipal and industrial installations
Stainless steel trim: specified where the media is corrosive or where tighter tolerances are needed for accurate regulation
Diaphragm materials (EPDM, Buna-N, PTFE-faced): selected based on chemical compatibility and temperature range of the process media
Standards and Certifications:
ASSE 1003 - performance standard specific to water pressure reducing valves, covering pressure regulation accuracy and durability
ASME B16.34 - pressure temperature ratings and materials for the valve body where used in industrial process service
NSF/ANSI 61 / NSF 372 - potable water contact and lead free compliance, required for water-service applications
UL Listing - required for pressure reducing valves used in fire protection water supply lines
Testing and Quality Control:
Set-point verification: every valve tested to confirm it holds its rated downstream pressure across its flow range before shipment
Hydrostatic testing: body pressure tested to confirm no leakage at rated working pressure
Cycle testing: pilot operated valves cycle tested to confirm the pilot responds correctly and the main valve doesn't hunt or chatter under varying flow
Material Test Reports (MTRs): available for industrial and process service valves where material traceability is specified
Sizing Criteria:
Correct PRV sizing depends on more than matching pipe diameter:
Inlet and outlet pressure range: the valve must handle the maximum expected upstream pressure and hold the target downstream set point across that entire range
Flow rate (Cv): the valve's flow coefficient must match expected minimum and maximum demand oversizing causes the valve to operate near closed, leading to instability and seat wear, the same failure mode seen in undersized globe valve applications
Pressure differential: a high ratio between inlet and outlet pressure can cause cavitation or noise if the valve or trim isn't rated for that drop
Turndown ratio: the range between minimum and maximum flow the valve can regulate accurately without hunting or instability
Industries and Applications:
Municipal water distribution - reducing main line pressure to safe levels for residential and commercial branches
Fire protection systems - UL-listed PRVs controlling pressure in standpipe and sprinkler supply lines
Oil and gas - regulating pressure across pipeline and process stages
Chemical processing - maintaining set pressure conditions for reaction and transfer systems
Steam systems - reducing boiler pressure to the level required by downstream equipment
