GA-42-00

GA-42-00 Servo-operated safety valve

GA-42-00 is a servo-operated safety valve that protects a hydraulic circuit from pressure rising above the value set for the specific valve execution. It is a functional part of the applicable hydraulic or pneumatic system and should be selected by exact designation and installation documentation rather than by appearance alone.

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.

Verified configuration and traceability

The recorded technical data identifies GA-42-00 as a servo-operated hydraulic safety valve. Confirmed function: Protection of a hydraulic circuit from excessive pressure. These values belong to the stated execution and should be checked against the passport of the individual unit before installation.

The documented system context is Hydraulic pressure and return lines according to aircraft documentation. Operating principle: Pilot stage opens the main bypass path at the calibrated pressure. For a safety valve, calibrated opening pressure, reseating pressure and the approved adjustment procedure are critical. Changing the setting without the passport procedure can alter the protective function of the entire circuit. Incoming inspection compares the complete marking, body execution, ports, threads, seals and indicated flow direction. Final verification is based on Product passport, aircraft hydraulic diagram and bench-test record when available. The four related products shown on the page provide navigation to functionally close units and do not state that those products are interchangeable.

Search and quotation records should preserve the exact GA-42-00 lettering and must not merge it with adjacent family suffixes. Forms without spaces or hyphens may be used as search variants, but they do not prove a different approved execution. An enquiry should also identify the installation system, required condition, delivery set and supporting documents. This information separates the requested unit from visually similar valves and preserves sourcing traceability.

Product Type: Servo-operated hydraulic safety valve

Designation: GA-42-00

Russian Designation: ГА-42-00

Function: Protection of a hydraulic circuit from excessive pressure

Operating Principle: Pilot stage opens the main bypass path at the calibrated pressure

System: Aircraft hydraulic system; exact circuit depends on suffix

Documented Family Executions: GA-42-00-3; GA-42-00-3K

Documented Application Note: GA-42-00-3K is recorded in An-24 / An-26 emergency hydraulic-system documentation

Interchangeability: Not established from the base designation; suffix and pressure setting must match

Installation: Hydraulic pressure and return lines according to aircraft documentation

Documentation: Product passport, aircraft hydraulic diagram and bench-test record when available

Alternative Designations: GA-42-00; ГА-42-00; GA 42 00; GA4200; ГА 42 00; ГА4200

Related Products: RD-14-00-1; RD-14-00-4; RD20A-2; OK 14A

Condition: New

Warranty: 6 Months

Stock Status: Pre-Order

Category: Valves

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.