What happens if the braking system is contaminated?

Does contamination affect the operation of the valve?

 

Owing to the enlarged transfer ports, which are bigger than the conventional cross-holes, deposits or contaminations cannot harm this valve. Also contributing thereto are the special material and the coating. The pressure exerted on the ball during bleeding is so high that even a ball with thick incrustations is moved. However, if it may become necessary, the upper part of the valve can easily be removed and cleaned. The ball can be pressed out with a simple paper clip. However, this should be necessary only in extreme cases.