LEVER MECHANISM OF AN INSTRUMENT FOR CHECKING VALVE FACES

Poppet valve 1 is inserted into standard sleeve 2, which is mounted in the body of the instrument. The valve face is pressed into the conical seat by lever 3, which turns about fixed axis A and contacts the valve through cover 4 and thrust member 5. Member 5 is loaded by spring 6. Compressed air is delivered from the pneumatic measuring device to chamber a of cover 4. If the face of the valve is c…