Sealco 110267X Service Relay Valve

Sealco 110267X Service Relay Valve is a direct replacement part in the Sealco relay-valve lineup, intended to substitute Sealco 110139 and 110139X in compatible tractor-trailer air-brake systems, where it functions to manage the flow of air to the brake circuits. It operates as a service relay valve that sends compressed air from the supply line to the brake circuit when the control line is activated, enabling the brakes to engage as part of the vehicle's braking sequence. The 110267X model specifies a 3/8-inch supply port and a 3/8-inch control port, aligning with the configuration used by the 110139X family to support straightforward retrofit in compatible equipment. As part of Sealco's established line of air-brake components, the 110267X is designed to maintain the performance characteristics of the 110139/110139X series, providing reliable brake response in fleets and repair environments that specify genuine Sealco parts.