Prefill Valve (PV32 to PV80 )
Polyhydron’s PV Series (PV32 to PV80) prefill and exhaust valves are pilot-operated check valves designed for rapid filling and exhausting of large hydraulic cylinders, common in press applications. They feature a poppet-type construction that allows free flow from Port A to Port B and requires pilot pressure at Port X for flow from Port B to Port A.
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Polyhydron Prefill Valve (PV32 to PV80) is designed for rapid prefilling and exhausting of large hydraulic cylinders, ensuring efficient operation in high-volume applications. It can also be used as an anti-cavitation check valve to protect the system. An optional decompression feature is available up to size 80 for smooth and controlled operation.
| Nominal pressure and flow ratings | ||||||||
|---|---|---|---|---|---|---|---|---|
| Model | Max. working pr. (bar) |
Max. flow l/min. | ||||||
| Prefilling | Exhausting | |||||||
| PV 32 (New) |
315 | 96 | 216 | |||||
| PV 40 | 315 | 152 | 304 | |||||
| PV 50 | 315 | 236 | 472 | |||||
| PV 63 | 315 | 372 | 744 | |||||
| PV 80 | 315 | 608 | 1216 | |||||
Key Features
- Decompression Feature:Â Size 40 to 80 valves often include an optional decompression feature. This allows for a two-stage progressive opening to prevent hydraulic shock during rapid exhaust.
- Low Pressure Drop:Â Large internal passages ensure that high volumes of oil can move quickly during the “prefill” phase of a press cycle.
- Leak-Free Closure:Â The poppet design ensures a high-integrity seal in the reverse direction until pilot pressure is applied.
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