Fuel Pump
ECN-75B
Price on request
Fuel Pump
Available on back-order
Description
ECN-75B in the helicopter fuel system
The ECN-75B is an aircraft electric centrifugal fuel pump used in helicopter fuel systems, mainly on Mi-8 and Mi-17 family helicopters. It is a tank-mounted pump designed to transfer aviation fuel from the external / main fuel tanks into the service tank. This transfer keeps the service tank supplied with fuel and helps maintain stable fuel feed for the engines during normal helicopter operation. In the Mi-8 fuel system, pumps of this type are installed directly in the fuel tanks and operate as part of the onboard fuel transfer circuit.
Fuel transfer function of the ECN-75B pump
The main function of the ECN-75B is to move fuel from the main tanks to the service tank. The pump creates the required flow and low outlet pressure for continuous transfer through the aircraft fuel lines. It does not work as a high-pressure engine fuel pump. Its role is to support fuel movement inside the helicopter fuel system before fuel reaches the engine feed section. Correct operation of the ECN-75B is important because interruption of fuel transfer can affect fuel balance and the fuel reserve available in the service tank.
Tank installation of the ECN-75B on Mi-8 helicopters
On Mi-8 helicopters, one ECN-75B pump is typically installed in each external fuel tank. The left tank pump is installed in the forward part of the tank, while the right tank pump is installed in the rear part. The left and right pumps are controlled separately from the cockpit electrical panel. This separate control allows the crew or maintenance personnel to manage fuel transfer by tank side according to the aircraft fuel system logic. When ordering or replacing the pump, the installation position and aircraft modification should be checked against the maintenance documentation.
Monoblock design of the ECN-75B
The ECN-75B is built as a compact monoblock unit combining a centrifugal pump section and a DC electric motor. The drive motor is MP-50B. The pump rotates at high speed and delivers fuel through the outlet line at the specified flow rate. The design is simple and compact, which is important for tank installation where available space is limited. Since the pump is immersed in fuel, the working medium also participates in cooling and lubrication of the unit during operation.
Cooling and lubrication of ECN-75B by aviation fuel
The ECN-75B operates directly in aviation fuel, usually kerosene used in aircraft fuel systems. The fuel passing through the pump cools and lubricates internal elements during operation. For this reason, operation without fuel or with insufficient fuel level is undesirable and can lead to overheating, increased wear or pump damage. During maintenance, attention should be paid to pump cleanliness, fuel contamination, inlet condition, electrical insulation, connector condition and any signs of mechanical damage or corrosion after storage.
Electrical control of the ECN-75B
The ECN-75B is powered from the 27 V DC aircraft electrical system. The pump consumes a relatively low current and is switched from the onboard electrical control panel. In operation, the crew can control the left and right transfer pumps separately. Troubleshooting normally includes checking supply voltage, current consumption, switch operation, wiring continuity, connector condition and actual fuel delivery. A pump that runs electrically but does not produce the required flow should be checked for mechanical wear, contamination or internal blockage.
Supply and identification of the ECN-75B pump
For supply, the pump should be requested by its full designation: ECN-75B / ЭЦН-75Б. The aircraft type, required condition and documentation should be confirmed before shipment. Since the unit is installed in the fuel system, external appearance alone is not enough to confirm serviceability. The pump should be checked for electrical performance, rotation, current draw, fuel delivery and outlet pressure according to the applicable aircraft maintenance documentation. For aircraft use, passport or acceptance documentation is recommended whenever available.
Details
Product Type: Aircraft electric centrifugal fuel pump
Designation: ECN-75B
Alternative Designations: ЭЦН-75Б; ECN-75B
Function: Transfer of fuel from external / main tanks to the service tank
Application / Where Used: Aircraft and helicopter fuel systems
System / Installation Area: Fuel tank transfer system
Part of System / Included in Set: Fuel transfer circuit from main tanks to service tank
Compatible Aircraft / Equipment: Mi-8, Mi-17 family helicopters and other compatible Soviet / Russian aircraft depending on configuration
Pump Type: Submersible / tank-mounted centrifugal electric pump
Construction: Monoblock unit with centrifugal pump section and DC electric motor
Drive Motor: MP-50B
Working Medium: Aviation fuel / kerosene
Fuel Flow Rate: 750 L/h
Supply Voltage: 27 V DC
Current Consumption: 3.9 A
Outlet Pressure: 0.4 kgf/cm²
Rotational Speed: 6300 rpm
Cooling / Lubrication: By pumped aviation fuel
Typical Installation on Mi-8: One pump in each external tank; left pump in forward tank section, right pump in rear tank section
Control: Separate control of left and right pumps from cockpit electrical panel
Overall Dimensions: 153 mm length × Ø67 mm diameter
Weight: 1.45 kg
Inspection / Testing: Electrical check, current draw check, rotation check, delivery and outlet pressure verification, connector and housing inspection
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
ECN-75B in the helicopter fuel system
The ECN-75B is an aircraft electric centrifugal fuel pump used in helicopter fuel systems, mainly on Mi-8 and Mi-17 family helicopters. It is a tank-mounted pump designed to transfer aviation fuel from the external / main fuel tanks into the service tank. This transfer keeps the service tank supplied with fuel and helps maintain stable fuel feed for the engines during normal helicopter operation. In the Mi-8 fuel system, pumps of this type are installed directly in the fuel tanks and operate as part of the onboard fuel transfer circuit.
Fuel transfer function of the ECN-75B pump
The main function of the ECN-75B is to move fuel from the main tanks to the service tank. The pump creates the required flow and low outlet pressure for continuous transfer through the aircraft fuel lines. It does not work as a high-pressure engine fuel pump. Its role is to support fuel movement inside the helicopter fuel system before fuel reaches the engine feed section. Correct operation of the ECN-75B is important because interruption of fuel transfer can affect fuel balance and the fuel reserve available in the service tank.
Tank installation of the ECN-75B on Mi-8 helicopters
On Mi-8 helicopters, one ECN-75B pump is typically installed in each external fuel tank. The left tank pump is installed in the forward part of the tank, while the right tank pump is installed in the rear part. The left and right pumps are controlled separately from the cockpit electrical panel. This separate control allows the crew or maintenance personnel to manage fuel transfer by tank side according to the aircraft fuel system logic. When ordering or replacing the pump, the installation position and aircraft modification should be checked against the maintenance documentation.
Monoblock design of the ECN-75B
The ECN-75B is built as a compact monoblock unit combining a centrifugal pump section and a DC electric motor. The drive motor is MP-50B. The pump rotates at high speed and delivers fuel through the outlet line at the specified flow rate. The design is simple and compact, which is important for tank installation where available space is limited. Since the pump is immersed in fuel, the working medium also participates in cooling and lubrication of the unit during operation.
Cooling and lubrication of ECN-75B by aviation fuel
The ECN-75B operates directly in aviation fuel, usually kerosene used in aircraft fuel systems. The fuel passing through the pump cools and lubricates internal elements during operation. For this reason, operation without fuel or with insufficient fuel level is undesirable and can lead to overheating, increased wear or pump damage. During maintenance, attention should be paid to pump cleanliness, fuel contamination, inlet condition, electrical insulation, connector condition and any signs of mechanical damage or corrosion after storage.
Electrical control of the ECN-75B
The ECN-75B is powered from the 27 V DC aircraft electrical system. The pump consumes a relatively low current and is switched from the onboard electrical control panel. In operation, the crew can control the left and right transfer pumps separately. Troubleshooting normally includes checking supply voltage, current consumption, switch operation, wiring continuity, connector condition and actual fuel delivery. A pump that runs electrically but does not produce the required flow should be checked for mechanical wear, contamination or internal blockage.
Supply and identification of the ECN-75B pump
For supply, the pump should be requested by its full designation: ECN-75B / ЭЦН-75Б. The aircraft type, required condition and documentation should be confirmed before shipment. Since the unit is installed in the fuel system, external appearance alone is not enough to confirm serviceability. The pump should be checked for electrical performance, rotation, current draw, fuel delivery and outlet pressure according to the applicable aircraft maintenance documentation. For aircraft use, passport or acceptance documentation is recommended whenever available.
Product Type: Aircraft electric centrifugal fuel pump
Designation: ECN-75B
Alternative Designations: ЭЦН-75Б; ECN-75B
Function: Transfer of fuel from external / main tanks to the service tank
Application / Where Used: Aircraft and helicopter fuel systems
System / Installation Area: Fuel tank transfer system
Part of System / Included in Set: Fuel transfer circuit from main tanks to service tank
Compatible Aircraft / Equipment: Mi-8, Mi-17 family helicopters and other compatible Soviet / Russian aircraft depending on configuration
Pump Type: Submersible / tank-mounted centrifugal electric pump
Construction: Monoblock unit with centrifugal pump section and DC electric motor
Drive Motor: MP-50B
Working Medium: Aviation fuel / kerosene
Fuel Flow Rate: 750 L/h
Supply Voltage: 27 V DC
Current Consumption: 3.9 A
Outlet Pressure: 0.4 kgf/cm²
Rotational Speed: 6300 rpm
Cooling / Lubrication: By pumped aviation fuel
Typical Installation on Mi-8: One pump in each external tank; left pump in forward tank section, right pump in rear tank section
Control: Separate control of left and right pumps from cockpit electrical panel
Overall Dimensions: 153 mm length × Ø67 mm diameter
Weight: 1.45 kg
Inspection / Testing: Electrical check, current draw check, rotation check, delivery and outlet pressure verification, connector and housing inspection
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.