Air shutoff valve, function - GF14.30-P-4028-02HA
The aspirator shutoff valve (126) Y32 is opened via the air pump switchover valve through vacuum or closed through ventilation.
The injected air for the electric air pump (M33) can flow in such a way for actuated air shutoff valves.
The check valve (126b) prevents flowing in of exhaust to the vacuum diaphragm (126a) for a switched off air injection and this protects this from thermal destruction and soiling.