768600MA

768600MA electromagnetic valve in aircraft fuel lines

The 768600MA is an aircraft electromagnetic fuel shut-off valve used for remote control of fuel flow in onboard fuel systems. The valve is installed directly in the fuel pipeline and works as a commanded shut-off element between sections of the system. In normal operation, it remains integrated into the line and reacts to electrical commands from the aircraft control circuit. When the control signal is applied, the internal mechanism moves the shut-off element and changes the condition of the fuel passage. The 768600MA is therefore an active fuel system component, not a service drain fitting or manual valve.

Fuel shut-off function of the 768600MA valve

The main function of the 768600MA is remote interruption of fuel flow. It allows the aircraft system to isolate a fuel line, stop supply to a selected circuit, or separate parts of the fuel system when required by operating logic. This function is used during engine start, shutdown, abnormal operation, maintenance checks, or system isolation depending on the aircraft type. The valve itself does not perform complex regulation; it opens or closes the fuel path according to the command from switches, relays, or the aircraft electrical control circuit. Reliable closing and sealing are essential because the valve works directly with aviation fuel under pressure.

768600MA on Mi-8MT, Mi-17, Mi-171 and Ka-32 helicopters

On Mi-8MT, Mi-17, Mi-171 and Ka-32 helicopters, the 768600MA is used in the fuel system pipeline arrangement together with tanks, boost pumps, filters, check valves and engine feed lines. In this layout, the valve helps separate system sections and allows fuel flow to be shut off when required. It can be part of the circuit between fuel storage, pumping elements and the engine supply path, depending on the specific helicopter configuration. Since fuel system layouts can differ by modification and overhaul status, the exact installation position must be confirmed by the aircraft parts catalog and maintenance documentation.

768600MA in fixed-wing aircraft fuel systems

The 768600MA is also used in fuel systems of aircraft such as An-24, An-26, Il-86, Tu-134, Tu-154, Yak-40 and Yak-42. In these applications, the valve is installed in main fuel pipelines or centralized fuel system sections where remote shut-off is required. It may be used during engine start, shutdown, line isolation, or other operating modes defined by the aircraft system. For fixed-wing aircraft, as with helicopters, the valve works as one element of a larger fuel supply system that includes tanks, pumps, filters, fittings, fuel control units and monitoring equipment.

Electrical control and operating conditions of 768600MA

The 768600MA is powered by the aircraft DC electrical system. Control is typically provided through switches, relays or system logic that energizes the electromagnetic element. When activated, the valve mechanism moves and blocks the fuel passage. Since the unit operates in a fuel environment and an aircraft vibration environment, condition of the body, seals, connector, electrical insulation and internal moving parts is important. The valve must remain tight in the closed position and must not create abnormal restriction when open. Fuel contamination, corrosion, mechanical damage or electrical faults can affect operation and should be checked before installation.

Identification and supply of 768600MA

The product is identified by the designation 768600MA. In Russian-language documentation it may also be written as 768600МА, with the Cyrillic letter. Both forms refer to the same type of electromagnetic fuel shut-off valve, but the exact applicability must be confirmed by the aircraft documentation. When ordering, the designation, aircraft type, required condition, documentation and installation system should be stated clearly. For aviation supply, the valve should be accompanied by manufacturer technical documentation, passport, label or other quality documents depending on availability and stock condition.

Product Type: Electromagnetic aircraft fuel shut-off valve
Designation: 768600MA
Alternative Designation: 768600МА
Function: Remote shut-off of fuel flow
Application / Where Used: Aircraft and helicopter fuel systems
System / Installation Area: Fuel pipeline
Compatible Aircraft / Equipment: Mi-8MT, Mi-17, Mi-171, Ka-32, An-24, An-26, Il-86, Tu-134, Tu-154, Yak-40, Yak-42
Associated System Components: Fuel tanks, boost pumps, filters, check valves, engine feed lines, fuel control units and pipeline fittings
Working Medium: Aviation fuels T-1, T-2, TS-1, RT
Environment: Air
Operating Voltage: 24.3 to 29.7 V DC
Operating Pressure: 10 kgf/cm²
Working Medium Temperature Range: −50 to +80 °C
Ambient Temperature Range: −60 to +80 °C
Nominal Passage Diameter: 35 mm
Dimensions: 100 × 134 × 171 mm
Weight: 1.52 kg
Technical Documentation: Manufacturer technical documentation

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