Pilot Operated Check Valves

Veljan Pilot Operated Check Valves are engineered for applications that require the secure holding of hydraulic loads while allowing for controlled reverse flow when signaled. Unlike standard check valves, these units feature a pilot port that, when pressurized, overcomes the internal spring force to "unlock" the poppet and permit flow in the normally blocked direction. Capable of handling operating pressures up to 5000 psi (350 bar), they are essential for safety-critical functions such as preventing cylinder drift, securing hydraulic outriggers, and maintaining position in heavy-duty lifting equipment.

Precision Engineering and Leak-Free Reliability:-

Built for maximum system integrity, these valves utilize a precision-ground poppet and seat design to ensure a bubble-tight seal, effectively eliminating internal leakage. The internal pilot piston is optimized for smooth decompression, reducing hydraulic shock and noise when the valve is opened under high pressure. With a robust construction that provides superior resistance to particle contamination, Veljan Pilot Operated Check Valves maintain consistent performance across a wide viscosity range and during extreme temperature fluctuations. This high mechanical efficiency ensures that load-holding circuits remain stable and productive over an outstanding operational life.

Flexible Integration and Versatile Configurations:-

Veljan offers these valves in multiple mounting styles—including subplate, threaded, and cartridge-type configurations—to allow for seamless integration into any manifold or piping layout. They are available with various pilot ratios to suit specific system decompression requirements and cracking pressures. Fully compatible with standard mineral oils as well as fire-resistant fluids like water glycols and phosphate esters, these valves are a versatile choice for both industrial and mobile machinery. Their compact envelope and reliable "lock-and-release" functionality make them a fundamental component for any high-performance hydraulic architecture requiring sophisticated directional control.