High-Flow Bidirectional Hydraulic Lock for Lifting with Yss-8BS Series

The YSS-8BS series bidirectional hydraulic lock is rated for max flow 30L/min, making it a true high flow hydraulic lock for medium-duty circuits. Multiple port sizes (G3/8, M14X1.5, M16X1.5) are available within this dual pilot check valve series to match your specific lifting equipment requirements while maintaining consistent load holding performance.

For lifting equipment hydraulic lock selection: choose G3/8 for heavy-duty mobile machinery, M14X1.5 for compact HPU systems, and M16X1.5 for precision industrial presses. All variants in the YSS-8BS series share identical pilot operated check valve internals and 30L/min max flow rating. Contact us with your cylinder bore and pressure specs for optimal sizing.

This safety lock valve automatically seals both cylinder ports instantly upon supply pressure loss, preventing uncontrolled load descent in lifting equipment. The mechanically seated bidirectional hydraulic lock design provides zero-leakage load holding independent of system pressure, meeting ISO 4413 safety requirements for personnel protection beneath suspended loads.

Yes. The YSS-8BS series hydraulic lock features optimized pilot damping that prevents chatter and oscillation when paired with proportional directional valves. This pilot operated check valve opens smoothly across the full 30L/min flow range, enabling precise speed control in lifting equipment without compromising load holding security during dwell periods.

This hydraulic cylinder lock is a positive-seating dual pilot check valve designed for zero-leakage load holding in static positions. A counterbalance valve controls load descent dynamically but allows some leakage. For lifting equipment requiring absolute position retention, the YSS-8BS series high flow hydraulic lock is the correct safety solution; use counterbalance valves only for controlled lowering.