Patent ID: 6354324
Filing Date: 2002-03-12
Classification: F16K,Y10T

Abstract:
An improved slide type for control of flow therethrough comprising,a body having a valve chamber with an upstream entrance area and a downstream outlet area, a support cone having an entrance chamber connected to the body extending to adjacent the upstream entrance of the valve chamber and having a downstream end area extending generally parallel to flow through the body, an orifice plate provided with an orifice, a circumferentially extending stub welded to the orifice plate extending upwardly around the orifice and welded adjacent to an internal end of the support cone, a guide assembly having a guide plate with an orifice in alignment with the orifice of the orifice plate secured to the orifice plate, the guide assembly having inwardly extending guides, a valve slide having outwardly extending slides disposed in the inwardly extending guides, whereby the orifice plate, guide assembly, and the slide valve can be released as a unit by cutting the weld connection of the stub to the internal end of the support cone and withdrawn through the bonnet area, and replaced through the bonnet area and welding the remaining upper end of the stub to the lower end of the support cone.