Reciprocating piston pump for use as e.g. solenoid-operated injection pump for delivering liquid fuel, has seat body with valve seat in support of dosing cylinder, where support and valve seat are opposite to actuator

摘要

The pump (1) has a solenoid with an actuator (4), and a dosing cylinder (21) with a guide hole (46) that accommodates a portion (5) of the actuator. A seat body (9) has a valve seat (8) in a support of the dosing cylinder, where the support and the valve seat are opposite to the actuator. The valve seat is arranged within the support, and the seat body has a coating of elastomer material. An elastomeric projection provided opposite to the actuator seals a pumping chamber (18) against an outlet port (12).