Shuttle valves for transmission applications

Edited by the Engineeringtalk editorial team Oct 16, 2002

The K3A125 is a high-flow shuttle valve that is mostly used in transmission systems as a purge valve where a hydraulic parking brake is necessary.

Shuttle valves are three-port switching elements that are used to automatically select the direction of supply to a service relative to the opposing pressure levels in the two outer ports.

The Sterling Hydraulics K3A125 is a high-flow shuttle valve that is mostly used in transmission systems as a purge valve where a hydraulic parking brake is necessary.

Designed to switch to interconnect its adjacent lower pressure ports, making it suitable for purging flow from the boost side of a transmission circuit to bleed off hot oil for cooling or filtration needs.

This ensures that the boost flow mixes well with the main flow and is only drawn off after full circulation through the pump and motor, thus avoiding any hot oil circuit loops.

With a full 350bar pressure capability, the K3A125 is a compact, cost effective design with various spring options available.