20701801 S2 Volvo B12 Compressor Valve Plate

What does a compressor valve plate do?

The compressor valve plate is a precision-machined component seated between the cylinder block and the cylinder head of an air brake compressor. It carries the intake and discharge reeds, which open and close with every piston stroke to ensure air flows in only one direction. This component is vital for maintaining the pressure required for reliable braking performance in heavy commercial vehicles.

Compatibility with Volvo B12

This specific valve plate is designed for use in Volvo B12 compressors. It serves as a reliable replacement to restore original compression efficiency and prevent pressure loss within the pneumatic system. Always verify the specific housing requirements before installation to ensure correct seating.

Installation and maintenance

When replacing the valve plate, technicians should inspect the seating surfaces for flatness and check the condition of the reeds. It is recommended to verify the port layout and thickness against the removed part to ensure a perfect fit. Proper installation ensures that the discharge temperature and oil vapor do not compromise the seal.

Troubleshooting air pressure issues

If you experience a drop in air pressure or visible leakage from the compressor head, inspecting the valve plate is a critical step in troubleshooting. Consult your authorized distributor to confirm exact fitment for your specific engine configuration.

OE cross-reference

13 01 12 (Compressor Valve Plate) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20701801S2.