Pressure Control Unit
AD-50
Price on request
Pressure Control Unit
Partner Stock
Description
AD-50 pressure control unit for aircraft pneumatic systems
The AD-50 is an aircraft pressure control unit used in onboard pneumatic air supply systems. It works with compressed air and controls the operating mode of the mechanical air compressor. The unit is not a pressure reducer and does not supply air to consumers by itself. Its task is to monitor pressure in the pneumatic bottle and switch the compressor between load and idle operation. In practice, AD-50 keeps the compressor from running under load when the air system has already reached the required pressure.
Automatic compressor control through AD-50
During operation, AD-50 reacts to pressure changes in the air bottle. When the pressure rises to the upper limit, the unit switches the compressor to idle mode. When the pressure drops to the lower limit, it returns the compressor to working mode so the bottle can be charged again. This keeps the pneumatic supply within the required range and reduces unnecessary compressor loading. On systems with AK-50 series compressors, this automatic switching is part of normal pneumatic system operation, not a separate pilot action.
Pneumatic system operation with AD-50 installed
The AD-50 works inside the aircraft pneumatic circuit together with the air compressor, pneumatic bottle, charging lines, non-return valves, pipelines, gauges, and consumer circuits. If the pressure does not build up or the compressor does not unload correctly, the cause is not always the AD-50 itself. Maintenance checks usually include the compressor, bottle pressure, leaks in the lines, valve condition, and pressure control unit adjustment. A wrong diagnosis can lead to replacing a serviceable unit while the fault remains elsewhere in the pneumatic system.
AK-50 compressor control and the AD-50 unit
The AD-50 is normally associated with mechanical air compressors of the AK-50 series, including AK-50T installations mentioned in technical references. Its function is to prevent continuous compressor loading after the pneumatic bottle reaches the required pressure. This is important because the compressor is a mechanical unit and should not remain under load longer than needed. The pressure control unit directs the system between charging and idle operation according to pressure level, which keeps the pneumatic supply ready for use without excessive compressor work.
Identification and ordering checks for AD-50
Before ordering, the marking on the installed unit should be checked against the aircraft parts catalog, acceptance label, or maintenance documentation. In English-language requests the unit is usually written as AD-50. In Russian documentation it may appear as АД-50. The designation should be confirmed by the actual system configuration and by the compressor type installed on the aircraft. For a clear request, it is useful to provide the part number, aircraft type, compressor model, and a photo of the marking if available. The product is also known under alternative designation АД-50.
Details
Product Type: Aircraft pressure control unit
Function: Automatic control of compressor operation based on air pressure
Application / Where Used: Aircraft pneumatic systems
System / Installation Area: Pneumatic air supply and compressor control system
Compatible Aircraft / Equipment: Pneumatic systems with AK-50 series compressors
Working Medium: Air
Compressor Engagement Pressure: 4 MPa
Compressor Disengagement Pressure: 5 ± 0.4 MPa
Technical Documentation: AD-50 ET label / acceptance documentation
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
AD-50 pressure control unit for aircraft pneumatic systems
The AD-50 is an aircraft pressure control unit used in onboard pneumatic air supply systems. It works with compressed air and controls the operating mode of the mechanical air compressor. The unit is not a pressure reducer and does not supply air to consumers by itself. Its task is to monitor pressure in the pneumatic bottle and switch the compressor between load and idle operation. In practice, AD-50 keeps the compressor from running under load when the air system has already reached the required pressure.
Automatic compressor control through AD-50
During operation, AD-50 reacts to pressure changes in the air bottle. When the pressure rises to the upper limit, the unit switches the compressor to idle mode. When the pressure drops to the lower limit, it returns the compressor to working mode so the bottle can be charged again. This keeps the pneumatic supply within the required range and reduces unnecessary compressor loading. On systems with AK-50 series compressors, this automatic switching is part of normal pneumatic system operation, not a separate pilot action.
Pneumatic system operation with AD-50 installed
The AD-50 works inside the aircraft pneumatic circuit together with the air compressor, pneumatic bottle, charging lines, non-return valves, pipelines, gauges, and consumer circuits. If the pressure does not build up or the compressor does not unload correctly, the cause is not always the AD-50 itself. Maintenance checks usually include the compressor, bottle pressure, leaks in the lines, valve condition, and pressure control unit adjustment. A wrong diagnosis can lead to replacing a serviceable unit while the fault remains elsewhere in the pneumatic system.
AK-50 compressor control and the AD-50 unit
The AD-50 is normally associated with mechanical air compressors of the AK-50 series, including AK-50T installations mentioned in technical references. Its function is to prevent continuous compressor loading after the pneumatic bottle reaches the required pressure. This is important because the compressor is a mechanical unit and should not remain under load longer than needed. The pressure control unit directs the system between charging and idle operation according to pressure level, which keeps the pneumatic supply ready for use without excessive compressor work.
Identification and ordering checks for AD-50
Before ordering, the marking on the installed unit should be checked against the aircraft parts catalog, acceptance label, or maintenance documentation. In English-language requests the unit is usually written as AD-50. In Russian documentation it may appear as АД-50. The designation should be confirmed by the actual system configuration and by the compressor type installed on the aircraft. For a clear request, it is useful to provide the part number, aircraft type, compressor model, and a photo of the marking if available. The product is also known under alternative designation АД-50.
Product Type: Aircraft pressure control unit
Function: Automatic control of compressor operation based on air pressure
Application / Where Used: Aircraft pneumatic systems
System / Installation Area: Pneumatic air supply and compressor control system
Compatible Aircraft / Equipment: Pneumatic systems with AK-50 series compressors
Working Medium: Air
Compressor Engagement Pressure: 4 MPa
Compressor Disengagement Pressure: 5 ± 0.4 MPa
Technical Documentation: AD-50 ET label / acceptance documentation
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.