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Metro’s lock valves, is a pilot operated check valve, is designed to lock a hydraulic cylinder and prevent them from drifting due to hydraulic leak from a directional control valve being in the neutral position or worn hydraulic valves or even a hose failure.

Double Lock Valves: 407, 408 and 409, will lock a hydraulic cylinder in both directions.

Single Lock Valves: 411 and 412, will lock a hydraulic cylinder in one direction.


  • Loaders, outriggers, backhoes, work platforms and cranes.
  • Any hydraulic circuit where you want to hold a cylinder in place with no hydraulic leakage.


  • Rated for 3,000 psi (207 bar)
  • Engineered for -22° to 194°F (-30° to 90°C) operating temperatures
  • Made in the USA
  • Fast 10-day delivery
Doering Metro 408 Dual Lock Valve, Double Pilot Operated Check Valve Hydraulic
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Doering designs and manufactures precision valve and pump products. Many of our products are designed for high pressure, zero-leak applications, and are available in a variety of materials, including Stainless Steel. We are constantly adding new products so please contact us if you can't find what you are looking for.