CI – Internal Drain Pilot Operated Check Valve
The Polyhydron Internal Drain Pilot Operated Check Valve – CI series is a seat-type hydraulic valve designed for high-pressure systems up to 315 bar. It allows unrestricted free flow from port A to port B and provides a leak-free seal in the reverse direction. To allow flow from B to A, a pilot pressure must be applied to the “X” port.
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Polyhydron Internal Drain Pilot Operated Check Valve – CI is a seat-type valve designed with an internal drain for reliable operation in hydraulic systems. It is available in both threaded and sub-plate mounting constructions, ensuring flexible installation. The valve comes with two pilot piston size options, providing efficient control and dependable performance in applications requiring controlled flow and secure locking.
| Nominal flow and pressure ratings | |||||||
|---|---|---|---|---|---|---|---|
| Model | Max. working pr. (bar) | Max. flowl/min. | |||||
| CI10 | 315 | 80 | |||||
| CI20 | 315 | 160 | |||||
| CI30 | 315 | 350 | |||||
- Operating Pressure: Up to 315 bar for all ports.
- Cracking Pressure: Typically 1 bar (options for 3 or 5 bar may be available).
- Construction: Seat-type valve with an internal drain, meaning the pilot fluid returns to the tank internally.
- Mounting Styles: Available in Threaded (T) or Subplate (S) mounting.
- Decompression Facility:Â Standard on many CI models, allowing for smooth pressure release before full opening.
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