MPK-5A

MPK-5A reversible rotary electromechanism

MPK-5A is an aviation reversible rotary electromechanism used to convert electrical energy into mechanical rotation. The unit operates from a 27 V DC aircraft power supply and delivers torque through its output shaft. In aviation applications, MPK-5A is used for remote opening and closing of valves, dampers and shut-off devices in hydraulic, fuel and air systems. The mechanism is designed for installations where the controlled element must rotate through a limited angle and stop at defined positions.

Function of MPK-5A in aircraft systems

The main function of MPK-5A is remote actuation of onboard pipeline fittings and air-system components. The mechanism can operate fuel valves, hydraulic distribution valves, pneumatic valves and air dampers in aircraft service systems. It may be used where direct manual access is difficult or where the valve must respond to cockpit commands or automatic system logic. The actuator rotates in both directions, allowing the connected device to move between open, closed or intermediate positions depending on the installation.

Limited-angle output shaft operation

MPK-5A has an output shaft with a limited angular travel range. According to the supplied context, the shaft travel is set by rigid external stops on the controlled object and may range from 30° to 180°. The mechanism includes a friction torque-limiting clutch, which protects the reducer and connected valve or damper when the end position is reached or when the controlled element jams. This arrangement allows the drive to work with different types of valves and dampers while reducing the risk of mechanical overload.

Aircraft installation areas of MPK-5A

In aircraft use, MPK-5A may be installed directly on fuel, hydraulic, pneumatic or air-conditioning system components. The supplied context associates the mechanism with Tu-154, Tu-22 / Tu-22M, An-12 and some heavy helicopter systems, depending on documentation. Typical installation zones include engine nacelles, wing and stabilizer technical compartments, hydraulic bays and fuselage equipment areas. On aircraft air systems, it may drive hot-air shut-off or regulating valves connected with ventilation, cabin air conditioning and anti-icing circuits.

Related equipment and control elements

MPK-5A works together with rotary valves, air dampers, shut-off valves, hard mechanical stops, cockpit switches, relays, contactors and aircraft DC power circuits. In some non-aviation applications, the mechanism is also used as a rotary drive for light directional antennas, with added feedback devices such as potentiometers or encoders. For aircraft installation, the main concern is compatibility with the valve shaft, mounting flange, connector wiring, control switch logic and system end-stop requirements.

Identification and ordering of MPK-5A

Before ordering MPK-5A, the buyer should confirm the aircraft type, installation system, required output shaft travel, shaft connection, connector type, condition and documentation set. It is also important to clarify whether the unit is required for aircraft use, industrial equipment or a non-aviation rotary drive application. For aviation supply, the product passport, year of manufacture, storage condition, inspection data and test records should be checked before shipment. Shaft rotation, clutch operation, current consumption and travel time are important acceptance points.

Product Type: Reversible rotary aircraft electromechanism / limited-angle actuator
Designation: MPK-5A
Russian Designation: МПК-5А
Alternative Designations: МПК5А, MPK5A
Function: Conversion of electrical energy into mechanical torque for remote actuation of valves and dampers
Application / Where Used: Aircraft hydraulic, fuel, pneumatic, air conditioning, ventilation and anti-icing systems
System / Installation Area: Fuel valves, hydraulic valves, air dampers, pneumatic shut-off valves, hot-air regulating valves and related actuating devices
Compatible Aircraft / Equipment: Tu-154, Tu-22, Tu-22M, An-12 and heavy helicopter systems according to source context and documentation
Non-Aviation Application Context: Rotary drive for light directional antennas, according to source context
Drive Type: Reversible rotary electromechanism with limited output shaft travel
Power Supply: 27 ± 2.7 V DC
Permitted Voltage Range: 24.3 to 29.7 V DC
Current Consumption: Not more than 2.75 A
Nominal Output Torque: 19.6 N·m / 2.0 kgf·m
Friction Clutch Actuation Torque: 37.3 N·m / 3.8 kgf·m
Output Shaft Travel: 30° to 180°, limited by rigid stops on the controlled object
Travel Time for 180°: 5 to 10 seconds
Duty Mode: Intermittent / repeated short-time operation
Dimensions: 185 × 69 × 110 mm
Weight: 2.2 kg
Vibration Resistance Reference: 10 to 300 Hz with acceleration up to 5 g, according to source context
Linear Load Resistance Reference: Up to 10 g, according to source context
Shock Load Resistance Reference: Single impacts up to 15 g with pulse duration up to 50 ms, according to source context
Construction Features: Reversible drive, output shaft, reducer, friction torque-limiting clutch, connector and mounting interface
Overload Protection: Built-in friction torque-limiting clutch
Related Components: Rotary valves, air dampers, shut-off valves, control switches, relays, contactors, hard stops, feedback potentiometers or encoders depending on installation
Condition: New / As-Stored / Overhauled / Serviceable, depending on availability
Technical Documentation: Product passport, wiring diagram, connector pinout, aircraft or equipment maintenance documentation, test records and inspection documents if available

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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.