Pilot Operated Pressure Relief cum Unloading Valve – PPRU
The Polyhydron PPRU is a pilot-operated, two-stage poppet-type Pressure Relief cum Unloading Valve. It is specifically designed to manage systems with two pumps (High-Low systems) by unloading a low-pressure pump at a pre-determined pressure while maintaining high-pressure relief for the main system.
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Polyhydron Pilot Operated Pressure Relief cum Unloading Valve – PPRUÂ is a two-stage, poppet-type pressure relief cum unloading valve designed for efficient pressure control and energy-saving operation in hydraulic systems. It combines relief and unloading functions in a single unit, enhancing system performance.
An optional solenoid unloading feature is available for automated operation. The valve is offered in three standard sizes: 10, 20, and 30, making it suitable for a wide range of applications.
| Â Operating Pressure | For port ‘A’, ‘X’ and ‘P’ — 315 bar For port ‘B’ —– 60 bar |
|---|---|
| Â Max. flow handling capacity | For Valve Size 10 ——– 100 l/min. 20 ——– 200 l/min. 30 ——– 400 l/min. |
- Mounting Styles: Available in Threaded Bodies (Sizes 20 & 30) for inline installation and Sub-plate Mounting (Sizes 10, 20, & 30) following ISO 6264 standards.
- Pressure Adjustment: Can be adjusted using either a set screw with a lock nut or a hand knob for easier manual control.
- Drainage:Â Offers both internal and external drain options (indicated in model codes as ‘omit’ for internal or ‘Y’ for external).
- Optional Features:
- Solenoid Unloading:Â Allows for remote unloading of the pump.
- Vent Connection:Â Provides a port for remote pressure control.
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