公开(公告)号：US3906987A

公开(公告)日：1975-09-23

申请号：US45059474

申请日：1974-03-13

Applicant: WATTS REGULATOR CO

Inventor： RUSHFORTH CALVIN ,  TINE SEBASTIAN DAVID

IPC: E03C1/10 ,  F16K17/04

CPC classification number: E03C1/106 ,  E03C1/108 ,  F16K17/04 ,  Y02A20/202 ,  Y10T137/3331 ,  Y10T137/6154 ,  Y10T137/7876 ,  Y10T137/86292

Abstract: A cross-connection valve, with upstream and downstream valving, which prevents backflow from contaminating the source of liquid is provided with field serviceability features by arranging the upstream valving and backflow discharge passageway means on an access door that normally serves as part of the valve body. A tool is arranged to enter through the discharge passage to hold the upstream valving in assembled condition on the access door, to permit field servicing for repair or replacement of the upstream valving, when the access door is open, and the downstream valving is also accessible for field servicing through the opening for the access door.

Abstract translation: 具有上游阀门和下游阀门的交叉连接阀门通过在通常用作阀体的一部分的检修门上布置上游阀门和回流排放通道装置来提供现场可维护性特征，其具有防止回流污染液体源的交叉连接阀 。 工具被布置成通过排放通道进入以将组装状态的上游阀保持在检修门上，以便当检修门打开时允许现场维修维修或更换上游阀门，并且下游阀门也可接近 通过门的开口进行现场维修。