GA-165/1

Operating principle of GA-165/1

An electrical command energizes the solenoid and moves the pilot element. Hydraulic pressure then shifts the main valve member to connect or isolate the specified circuit; end-position control depends on the exact execution and aircraft wiring. Reliable operation depends on clean working fluid, the moving element, seat, springs and seals. Contamination, reversed connections or an unsuitable pressure can prevent the intended response.

Role in the aircraft system

Aircraft emergency and reserve hydraulic circuits. Technical records identify GA-165/1 in emergency landing-gear release and in arrangements feeding the first system from a second-system pumping station. The valve works with pipelines, a pressure source, downstream equipment and the control elements of its circuit. These products are functionally related but must not be described as interchangeable merely because they operate in the same system.

Installation and maintenance checks

Before installation, verify the nameplate, ports, flow direction, internal cleanliness and seal condition. Working pressure, temperature, fluid and the prescribed functional test must come from the passport and maintenance documentation. Adjustment without approved instructions is not permitted. Incoming-inspection results should remain with the product records.

Identifying GA-165/1 for ordering

Retain the complete suffix and verify the port arrangement, connector and de-energized position. GA-165, GA-165/1 and GA-165B are related but separate executions. Other related products are listed in the valves category. An enquiry should state the complete designation, execution, condition, delivery set and required supporting documents.