Double-Acting Pilot Check Valve Kit with 500 mm Lines - Code 50768

The professional double-acting pilot-operated check valve kit (Product Code: 50768) is a pre-assembled hydraulic safety and flow control manifold designed specifically for direct installation onto agricultural tractor hydraulic top link cylinders. Supplied complete with dedicated structural rigid fluid transfer lines measuring 500 mm in length and high-flow 1/2" BSP (Gas) threaded connection ports, this hardware kit allows operators to equip or service top link cylinders, guaranteeing absolute stroke position lock under load and eliminating implement drift.

Design Details and Functionality

This double pilot-operated check valve plays a critical safety role during heavy ground-engaging field operations and rapid on-road implement transport. The internal valving assembly permits pressurized hydraulic oil to flow into one side of the cylinder only when a specific pilot pressure is detected from the opposing line. Consequently, as soon as the tractor cabin control lever is returned to its neutral position, the valve mechanically seals the fluid within the cylinder chambers. This complete hydraulic isolation prevents accidental piston rod creep or retraction when carrying high-tonnage suspended machinery (such as plows, rotary tillers, or flail mowers) and acts as a vital fail-safe device in the event of sudden external rubber hose ruptures or line drops. The oversized 1/2" port configuration permits higher oil volume transfer and reduces flow restriction, making this kit perfect for large-bore cylinder assemblies. The architectural layout of the kit, featuring pre-formed 500 mm steel plumbing lines and matched connector fittings, ensures a flush, vibration-resistant layout along the cylinder body, minimizing installation time and maximizing overall operational reliability.

Technical Specifications