Piston pump with valve assembly unit has one end of spring on valve seat carrier and other attached to piston

摘要

The pump has a valve (9, 19) with valve body (12), and a spring (4) attached to the valve body by a spring pot (8) and to the piston. The piston may be made as a unit with the return spring, with the spring and valve seat carrier able to form a larger assembly unit. The pot may fit in a recess (8) in the valve seat carrier.