PRESSURE SUSTAINING VALVE
Model-AD-500 PS
Overview
A Pressure Sustaining Valve is a hydraulically operated, self-actuated control valve designed to maintain a minimum preset upstream pressure in a pipeline or system.
The valve prevents upstream pressure from falling below the set value, ensuring stable system operation, pump protection, and adequate pressure availability for critical zones.
Key Features
- ✓Maintains minimum upstream pressure
- ✓Protects pumps and infrastructure
- ✓Fully automatic operation
- ✓No external power required
- ✓Smooth modulation
Working Principle
The valve operates automatically using line pressure, without any external power source.
- ✓When upstream pressure is above the preset sustaining value, the valve opens to allow flow.
- ✓If upstream pressure drops toward the set minimum, the valve modulates toward closing, restricting flow.
- ✓The valve maintains the upstream pressure at or above the preset level while allowing downstream demand to be met.
This continuous modulation ensures pressure stability and system protection under varying flow conditions.
Key Functions
- ✓Sustains minimum upstream pressure
- ✓Protects pumps and upstream infrastructure
- ✓Prevents system pressure collapse
- ✓Ensures priority supply to critical zones
- ✓Maintains stable pipeline operation
Main Components
- ✓Main Control Valve Body (Diaphragm Type)
- ✓Pressure Sustaining Pilot Valve
- ✓Control Tubing and Fittings
- ✓Pilot Line Strainer
Applications
Pump Discharge Lines
Pump discharge and transmission lines
Trunk Mains
Water supply trunk mains
Pressure Zones
Pressure zone management systems
Industrial Networks
Industrial water networks
Irrigation Pipelines
Irrigation pipelines
Fire Protection
Fire protection systems
Advantages
- ✓Fully automatic operation
- ✓No external power required
- ✓Accurate and reliable pressure control
- ✓Smooth modulation without pressure shock
- ✓Long service life with minimal maintenance
- ✓Easy pressure setting and adjustment
Typical Specifications
Customizable 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
- ✓Trim Material: Stainless Steel
- ✓Coating: Fusion Bonded Epoxy (FBE)
- ✓End Connections: Flanged EN / ISO / ANSI
- ✓Operating Medium: Water
Why Choose Our Pressure Sustaining Valve?
Our Pressure Sustaining Valves are engineered to ensure minimum pressure protection, system reliability, and long-term durability in demanding water applications. Designed and tested to international standards, these valves deliver consistent performance and low maintenance operation.