Valves, except for one exhaust valve is special, and then the rest are universal. The exhaust valve is a white plastic block.
The difference between the exhaust valve and the other valves is the shaft core, and the neck length of the exhaust valve’s axis is longer:


Some machines placed for too long, the valve will stick, you can take it apart and soak it, but because the valve has an O-ring on it, so can not carry out ultrasonic cleaning, otherwise easy to break and deform.
This is the O-ring of the base, which is not easily broken:

