公开(公告)号：WO9206298A3

公开(公告)日：1993-08-19

申请号：PCT/US9107364

申请日：1991-10-02

Applicant: TORO CO

Inventor： BEATTIE JOHN M

IPC: F04B53/00 ,  F04B53/16 ,  F16J15/32 ,  F04B21/08

CPC classification number: F16J15/3236 ,  F04B53/164

Abstract: An improved high pressure reciprocating plunger pump (2) includes a seal for the plunger (8) comprising a V-shaped elastomeric seal member abutted against a backup member (20). The backup member (20) is made from an acetal polymer, e.g. a Delrin R type material, reinforced with high strength fibers, e.g. Kevlar R fibers. This provides a backup member (20) having sufficient resistance to seal member extrusion as well as high strength for resisting side loads imposed by the plunger (8).