GA-42-00

Operating function of GA-42-00

When inlet pressure reaches the calibrated threshold, the pilot stage causes the main valve to open and bypass fluid to the return line. As pressure falls, the valve closes and restores normal circuit separation. Reliable operation depends on clean working media, serviceable seals, correctly connected lines and a calibrated configuration that matches the technical documentation.

Role in the aircraft system

GA-42-00 belongs to a family of hydraulic safety valves. Aircraft documentation records suffix-specific versions such as GA-42-00-3 and GA-42-00-3K; the suffix defines the approved setting and installation, so the base designation alone is insufficient for interchangeability. Connected units form one operating circuit, but each performs a separate task and must not be presented as interchangeable merely because it is installed in the same system.

Installation and maintenance checks

A GA-42-00-3K family execution is documented in the emergency hydraulic system of An-24 / An-26 family aircraft. The exact GA-42-00 item offered here must still be matched to the aircraft manual, pressure setting and passport. Maintenance checks normally cover connection tightness, body condition, contamination and compliance with the specified test limits. Any calibration or adjustment must follow the product passport or approved repair documentation.

Identifying GA-42-00 for ordering

Order by the full nameplate code rather than appearance. Check the suffix, calibrated pressure, port arrangement, working fluid, preservation status and test records before treating a unit as suitable. Other related items are listed in the valves category. An enquiry should identify the required execution, condition, delivery set and supporting documentation.