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Combination shut-off and test-injection valve

  • US 5,183,078 A
  • Filed: 06/24/1991
  • Issued: 02/02/1993
  • Est. Priority Date: 06/24/1991
  • Status: Expired due to Fees
First Claim
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1. A combination shut-off and test-injection valve comprising;

  • a valve body having an axially aligned inlet end and outlet end adapted for connection to a fluid line or conduit, a main fluid flow passageway extending from end to end, a shut-off valve chamber in fluid communication with said main fluid flow passageway, and an outwardly extending tubular extension adapted at its outer end for connection to diagnostic and injection devices and having an interior fluid passageway in fluid communication with said main fluid flow passageway at a location laterally spaced from said shut-off valve chamber to define a test-injection valve passageway,shut-off valve means having a portion movably disposed in said shut-off valve chamber movable between an open position allowing fluid flow through said through said main fluid flow passageway from either end and a closed position closing off fluid flow through said main fluid flow passageway and having a stem portion extending outwardly through a side wall of said valve body,means on the outer end of said stem portion for moving said shut-off valve means between the open and closed positions,seal means between said stem portion and said valve body for preventing fluid leakage from said main fluid flow passageway around said stem portion to the exterior of said valve body,test-injection valve means mounted in said test-injection valve passageway at the outer end of said tubular extension and having a spring biased plunger mechanism movable between a normally closed position preventing communication between said main fluid flow passageway and the exterior of said body and an open position allowing fluid communication between said main fluid flow passageway and the exterior of said body, andsaid shut-off valve means and said test-injection valve means being independently operable whereby said shut-off valve means may be operated to open or close fluid flow through said valve body and isolate portions of the fluid system in which it is installed and said test-injection valve means may be connected to various test equipment and injection devices for diagnosing and cleaning the fluid system and its components during normal operating conditions of the fluid system or in an isolated condition.

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