CL – External Drain Pilot Operated Check Valve
The Polyhydron External Drain Pilot Operated Check Valve Model CL is a seat-type, pilot-operated check valve specifically designed with an external drain facility [5.5, 5.33]. It allows free flow from Port A to Port B while providing a leak-free seal in the opposite direction (B to A) [5.9].
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Polyhydron External Drain Pilot Operated Check Valve – CL is a seat-type valve designed with an external drain for efficient and reliable operation in hydraulic systems. It is available in both threaded and sub-plate mounting options, allowing flexible installation. The valve ensures secure load holding and controlled flow, making it suitable for demanding applications requiring stability and safety.
| Nominal flow and pressure ratings | |||||||
|---|---|---|---|---|---|---|---|
| Model | Max. working pr. (bar) | Max. flowl/min. | |||||
| CI10 | 315 | 80 | |||||
| CI20 | 315 | 160 | |||||
| CI30 | 315 | 350 | |||||
Key Features & Specifications
- External Drain (Port Y): Unlike the Model CI (internal drain), the CL model uses an external drain [5.33]. This is critical for applications where back-pressure in Port A would otherwise prevent the valve from opening when piloted [5.9].
- Pilot Operation (Port X):Â Reverse flow (B to A) is achieved by applying pressure to the pilot Port X [5.9, 5.14].
- Decompression Facility:Â These valves often include a decompression feature that allows for a smooth, two-stage opening to exhaust compressed oil without hydraulic shock [5.14, 5.31].
- Mounting Options:Â Available in both threaded port and subplate mounting (conforming to ISO 5781) [5.5, 5.7].
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