20399145 Reducing Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Pneumatic Control Pressure Reducing Valve - Part Number: 20399145

Genuine Volvo Penta reducing valve used in the compressed-air control circuit on DH10A and THD102 installations. It regulates supply pressure for the pneumatic shutter or exhaust-brake control system.

⚙️ Key Features

• Pneumatic pressure-reducing and regulating valve

• Used in the engine air-control or exhaust-brake shutter circuit

• Confirmed on DH10A and THD102 engine installations

• Maintains controlled downstream pressure

• Requires clean dry air and leak-free hose connections

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20399145 - current Volvo Penta reducing-valve reference

OEM / Related Numbers:

• 8151868 - related shutter housing

• 8158342 - related solenoid valve

• 948525 - related hose assembly

• 479690 - related leak-off line

Aftermarket / Verified Equivalents:

• None confirmed

🚤 Compatibility

Commonly used on:

• Volvo Penta pneumatic shutter and exhaust-brake control systems

Typically suits:

• Engine / equipment models:

• DH10A

• THD102KB

• THD102KD

• THD102K-KB

• Engine Type: Volvo Penta 10-litre diesel

• Year / Serial Range: Pneumatic-system layout and engine serial-number dependent

🔌 Function

Reduces compressor or reservoir pressure to the controlled pressure required by the downstream shutter or actuator circuit.

Common signs of failure:

• Downstream pressure too high or too low

• Exhaust-brake or shutter not operating correctly

• Continuous hissing or air leakage

• Valve sticking or slow response

• Pneumatic actuator cycling erratically

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging