Product Name: Bidirectional Hydraulic Lock

Overview
The bidirectional hydraulic lock is a compact, high-performance valve designed to positively lock hydraulic actuators in both directions. It prevents load drift caused by internal leakage or pressure fluctuations, ensuring that cylinders or motors remain securely positioned even under varying loads. This component is widely used in railway large-scale track maintenance machinery, including lifting, stabilizing, tamping, and clamping systems.

How It Works
The hydraulic lock consists of two pilot-operated check valves integrated into a single body. When oil flow is supplied to one port, the corresponding check valve opens while the opposite check valve remains closed, allowing controlled movement. Once flow stops, both check valves close instantly, trapping oil in the actuator and locking it in place. This bidirectional function provides reliable holding force in both extension and retraction directions.

Key Features

• Positive bidirectional locking – no unintended movement

• Low internal leakage – long-term position holding

• Compact, space-saving design

• High fatigue resistance – suitable for heavy vibration and shock loads

• Wide operating temperature range

• Easy direct mounting between valve and actuator

Technical Specifications (Typical)

• Nominal pressure: up to 31.5 MPa (315 bar)

• Nominal flow: 40 – 120 L/min (depending on port size)

• Cracking pressure: ≤ 0.2 MPa

• Internal leakage: ≤ 5 drops/min at rated pressure

• Port threads: G1/4" to G1" or as required

Applications

• Rail lifting and stabilizing units

• Track tamping and ballast regulating machines

• Rail grinding vehicle outriggers

• Clamping and locking cylinders in maintenance equipment

• Mobile and industrial hydraulic systems requiring position retention

Why Choose Our Bidirectional Hydraulic Lock
Manufactured with precision machining and high-quality sealing materials, our hydraulic locks are built to withstand the toughest railway field conditions – dust, vibration, and extreme temperatures. Each unit is tested for leakage and pressure integrity before shipment. Backed by over 20 years of experience in railway track maintenance components, we deliver reliable performance that keeps your equipment safe and productive.

Ordering Information
Please contact us with your required port size, flow rate, and mounting interface. Custom configurations are available upon request.