Pressure Reducing and Sustaining Valve
Model-AD-500 PRSV
Overview
A Pressure Reducing and Sustaining Valve (PRSV) is a hydraulically operated, self-actuated control valve designed to reduce high inlet pressure to a constant lower downstream pressure, while simultaneously sustaining a minimum upstream pressure.
This dual-function valve is widely used in water supply networks, pumping systems, irrigation lines, and industrial pipelines to protect equipment and ensure stable system operation.
Quick Overview
- ✓Dual-function operation
- ✓Hydraulically operated
- ✓Self-actuated
- ✓No external power required
- ✓Automatic pressure control
Working Principle
The Pressure Reducing and Sustaining Valve operates automatically using line pressure as the driving force, without the need for external power.
- ✓When downstream pressure rises above the set value, the valve modulates toward closing to reduce pressure.
- ✓When upstream pressure drops below the minimum set level, the valve restricts flow to sustain the required upstream pressure.
- ✓The valve continuously adjusts its position to maintain balanced pressure conditions on both sides.
This ensures safe operation, prevents pressure fluctuations, and protects pipelines and downstream equipment.
Key Functions
- ✓Reduces downstream pressure to a preset safe level
- ✓Sustains minimum upstream pressure
- ✓Prevents pressure surges and pipeline damage
- ✓Ensures stable flow and system reliability
Main Components
- ✓Main Control Valve Body (Diaphragm or Piston type)
- ✓Pressure Reducing Pilot Valve
- ✓Pressure Sustaining Pilot Valve
- ✓Strainer and Control Tubing
- ✓Pressure Adjustment Screws
Applications
Municipal Systems
Municipal water distribution systems
Pumping Stations
Pumping stations and booster lines
Irrigation Networks
Irrigation and agricultural networks
High-Rise Buildings
High-rise building water supply
Industrial Pipelines
Industrial process pipelines
Fire Protection
Fire protection systems
Advantages
- ✓Fully automatic operation
- ✓No external power required
- ✓Accurate and stable pressure control
- ✓Reduces water losses and leakage
- ✓Long service life with minimal maintenance
- ✓Easy pressure setting and adjustment
Available Specifications
Example specifications – can be customized to meet specific requirements
- ✓Size Range: DN 50 to DN 300 (and above on request)
- ✓Pressure Rating: PN 10 / PN 16 / PN 25
- ✓Body Material: Ductile Iron / Cast Steel
- ✓Coating: Fusion Bonded Epoxy (FBE)
- ✓End Connections: Flanged as per EN / ISO / ANSI standards
- ✓Operating Medium: Water