admission valve

During the intake or admission stroke, the piston moves downward as a charge of combustible fuel and air is admitted into the cylinder through the open intake valve.

The experiment and calculating example show when concentration of polymer solution increases angle of lag of valve ball opening increases and pump admission coefficient drops.

When the water level of condensate in the drain sump drops, the cup to shut the admission pipe falls down, the passage for steam to enter into the valve body is opened.