Compressor Unloader IntakeValves

Main Features

Cast Aluminum Alloy Body: High‑strength precision casting, excellent heat‑resistance and anti‑corrosion performance, adapts to high‑temperature and high‑pressure operating environment of screw compressors.

Integrated Unloading‑blow‑off Structure: Built‑in blow‑down port and check‑valve function. Effectively prevents oil‑gas reverse ejection during emergency shutdown, lowers air‑end cavitation noise, performs stably under frequent load‑unload cycles.

Complete Assembly Structure: Equipped with valve disc, spring and sealing components. Supports whole‑unit replacement for easy on‑site overhaul and maintenance.

Applications

Opens inlet for loading to draw fresh air into air‑end; closes inlet and executes blow‑down venting at unloading status. Stabilizes system pressure, avoids heavy‑load motor startup and protects compressor main unit.

Extended Application: Air intake control for other screw compressors with compatible flange installation size.

Working Principle

Loading state: Control air pushes internal actuator, valve disc opens, fresh air enters air‑end, compressor runs under loaded condition.

Unloading state: Control air exhausts, spring pushes valve disc to close air inlet; meanwhile built‑in blow‑off port releases internal pressure, compressor switches to no‑load operation.

Shutdown state: Built‑in check‑valve keeps closed to prevent oil‑gas back‑flow.