Pilot Operated Pressure Relief Valves – PPR
Polyhydron’s PPR series of Pilot Operated Pressure Relief Valves are two-stage poppet-type valves designed to protect hydraulic systems from over-pressurization. They are specifically valued for their high flow handling capacity, low pressure override, and versatility in mounting.
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Polyhydron Pilot Operated Pressure Relief Valves – PPR is a pilot-operated, seat-type pressure relief valve designed for efficient and reliable pressure control in hydraulic systems. It offers high flow handling capacity with low pressure override, ensuring stable performance.
Key features include remote controllability and the option for solenoid unloading, providing flexibility in operation. The valve is available with both threaded port bodies and sub-plate mounting styles for versatile installation.
| Nominal pressure and flow ratings | |||||||
|---|---|---|---|---|---|---|---|
| Model | Max. working pr. (bar) |
Max. flow (l/min) |
|||||
| PPR 10 | 315 | 100 | |||||
| PPR 20 | 315 | 200 | |||||
| PPR 30 | 315 | 400 | |||||
- 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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