PLUNGER PUMP OF SUPER-HEIGHT PRESSURE Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: suction and delivery valves are mounted inside the head The valves are axially aline. A plunger is mounted inside the bushing os float type inside the cylinder to define a working chamber. The bushing and cylinder bear on the insert having a ring flange and central passage. One of the sides of the insert mates with surface of the seat of the suction plate valve constructed as a ring whose housing is spring-loaded with a spring and bear on the surface of the valve. The bushing is arranged over the whole length of the cylinder. The second side of the insert bears on the face surface of the cylinder and bushing. The sealing bushing is mounted inside the central passage of the insert and working chamber. The bushing overlaps the butt space between the insert and bushing of float type. EFFECT: enhanced reliability. 7 cl, 2 dwg