Hydraulic Valve
GA-74M/5
Price on request
Hydraulic Valve
Description
GA-74M/5 valve in helicopter hydraulic systems
The GA-74M/5 is a two-position hydraulic shut-off valve with electromagnetic control. It is used in helicopter hydraulic systems to connect or disconnect hydraulic fluid supply to flight control boosters. The valve does not create pressure and does not work as a pump. It switches the hydraulic line according to the control command, so the boosters can receive fluid from the main or standby hydraulic system. On Mi-8 type installations, technical descriptions place these valves on the hydraulic panel in the main gearbox compartment.
Switching hydraulic flow through GA-74M/5
In operation, GA-74M/5 routes hydraulic fluid between supply and return paths depending on the system command. When the valve is in the supply position, working fluid is directed to the hydraulic boosters. When the circuit is disconnected, the flow is routed back to return. This switching is used to manage booster supply in normal and standby system operation. The valve is therefore part of the hydraulic control architecture, not a simple pipe fitting or manual shut-off component.
Control booster supply with valve GA-74M/5
The GA-74M/5 works in the hydraulic lines feeding the flight control boosters. It is linked with the main hydraulic system, standby hydraulic system, booster supply lines, return lines, fittings, electrical control wiring, and cockpit control logic. If a booster does not receive pressure correctly, the valve is only one possible cause. Maintenance checks usually include hydraulic pressure, fluid condition, electrical command to the electromagnet, spool movement, line blockage, and the condition of the connected booster.
Aircraft application of hydraulic valve GA-74M/5
The GA-74M/5 is used on Mi-8, Mi-17, and Mi-171E helicopters in hydraulic systems that supply flight control boosters. The exact installation depends on the helicopter configuration and the hydraulic panel layout. A unit from the same valve family should not be selected only by appearance, because spool configuration, control function, or aircraft documentation may differ. For supply or replacement, the installed marking and the applicable spare parts catalog should be checked first.
Identification and ordering checks for GA-74M/5
Before ordering, the marking on the installed valve should be compared with the aircraft maintenance manual, parts catalog, or technical description. In English-language documents, the valve may be written as GA-74M/5. In Russian documentation, the same item is written as ГА-74М/5. It is useful to provide the helicopter type, system location, full designation, and a photo of the marking if available. The product is also known under alternative designation ГА-74М/5.
Details
Product Type: Two-position hydraulic shut-off valve with electromagnetic control
Function: Switching hydraulic fluid supply to hydraulic boosters
Application / Where Used: Aircraft hydraulic systems
System / Installation Area: Main and standby hydraulic circuits, hydraulic booster supply lines
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-171E helicopters
Working Medium: Hydraulic fluid (AMG-10)
Minimum Switching Pressure: 0.5 MPa
Operating Voltage: 22–27 V DC
Current Consumption: Not more than 10 A (at 24 V)
Control Type: Remote electromagnetic control
Electromagnet Type: EMO-2/2
Design Features: Hydraulic section with control and operating spool valves, built-in end-position microswitch
Technical Documentation: GA-74M/5 Technical Description and Aircraft Maintenance Manual
Payment & delivery
All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.
In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.
Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.
Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.
Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.
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.
- Description
- Details
- Payment & delivery
GA-74M/5 valve in helicopter hydraulic systems
The GA-74M/5 is a two-position hydraulic shut-off valve with electromagnetic control. It is used in helicopter hydraulic systems to connect or disconnect hydraulic fluid supply to flight control boosters. The valve does not create pressure and does not work as a pump. It switches the hydraulic line according to the control command, so the boosters can receive fluid from the main or standby hydraulic system. On Mi-8 type installations, technical descriptions place these valves on the hydraulic panel in the main gearbox compartment.
Switching hydraulic flow through GA-74M/5
In operation, GA-74M/5 routes hydraulic fluid between supply and return paths depending on the system command. When the valve is in the supply position, working fluid is directed to the hydraulic boosters. When the circuit is disconnected, the flow is routed back to return. This switching is used to manage booster supply in normal and standby system operation. The valve is therefore part of the hydraulic control architecture, not a simple pipe fitting or manual shut-off component.
Control booster supply with valve GA-74M/5
The GA-74M/5 works in the hydraulic lines feeding the flight control boosters. It is linked with the main hydraulic system, standby hydraulic system, booster supply lines, return lines, fittings, electrical control wiring, and cockpit control logic. If a booster does not receive pressure correctly, the valve is only one possible cause. Maintenance checks usually include hydraulic pressure, fluid condition, electrical command to the electromagnet, spool movement, line blockage, and the condition of the connected booster.
Aircraft application of hydraulic valve GA-74M/5
The GA-74M/5 is used on Mi-8, Mi-17, and Mi-171E helicopters in hydraulic systems that supply flight control boosters. The exact installation depends on the helicopter configuration and the hydraulic panel layout. A unit from the same valve family should not be selected only by appearance, because spool configuration, control function, or aircraft documentation may differ. For supply or replacement, the installed marking and the applicable spare parts catalog should be checked first.
Identification and ordering checks for GA-74M/5
Before ordering, the marking on the installed valve should be compared with the aircraft maintenance manual, parts catalog, or technical description. In English-language documents, the valve may be written as GA-74M/5. In Russian documentation, the same item is written as ГА-74М/5. It is useful to provide the helicopter type, system location, full designation, and a photo of the marking if available. The product is also known under alternative designation ГА-74М/5.
Product Type: Two-position hydraulic shut-off valve with electromagnetic control
Function: Switching hydraulic fluid supply to hydraulic boosters
Application / Where Used: Aircraft hydraulic systems
System / Installation Area: Main and standby hydraulic circuits, hydraulic booster supply lines
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-171E helicopters
Working Medium: Hydraulic fluid (AMG-10)
Minimum Switching Pressure: 0.5 MPa
Operating Voltage: 22–27 V DC
Current Consumption: Not more than 10 A (at 24 V)
Control Type: Remote electromagnetic control
Electromagnet Type: EMO-2/2
Design Features: Hydraulic section with control and operating spool valves, built-in end-position microswitch
Technical Documentation: GA-74M/5 Technical Description and Aircraft Maintenance Manual
All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.
In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.
Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.
Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.
Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.
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.