VALVE FOR SUBMERSIBLE PUMP Russian patent published in 2007 - IPC F04B53/10 F16K5/02 

FIELD: pump engineering.

SUBSTANCE: valve comprises housing with inlet and outlet spaces and valving member provided with rod and seat and mounted inside the housing. The valving member is made of a plunger to form a valving pair together with the inner side of the seat. The seat is made of a set of radially movable rings mounted in the bearing bushing and sealed by means of flexible members. The seat surfaces of the rings are shifted eccentrically one with respect to the other and are pressed in the axial direction. The valving member is spring-loaded and made of thrust flange, and the bearing bushing of the seat has ring groove for the thrust flange. The radially movable rings are pressed in the axial direction by means of thrust bushing through the flexible ring. The weight underlies the valving member , the spring is set in the inlet plane of the housing between the weight and thrust bushing of the seat, and the seat is set in the bore of the housing and is locked with respect to it by means of spacing ring.

EFFECT: enhanced reliability.

2 dwg