Gary J Block

US Patent:

46501576, Mar 17, 1987

Filed:

Sep 30, 1985

Appl. No.:

6/781687

Inventors:

Ronald L. Sillaman - Hunker PA
Gary C. Block - Carnegie PA

Assignee:

Pittsburgh Brass Manufacturing Co. - Irwin PA

International Classification:

F16K 5100
F16K 500

US Classification:

251144

Abstract:

A ball valve for controlling upstream to downstream fluid flow, for example, from an apertured tank bottom, has a housing body for bolted-on mounting. The housing has a flow passageway therethrough that angles between its upstream and downstream portions and that is controlled by a valve ball rotatably positioned in and sealed-off within its upstream portion. A resilient, L or ladle-shaped annular gasket is positioned upstream at the joint between the valve housing and the tank bottom and in engagement with the ball adjacent an upstream end portion of its open-end flow passage and, in such a manner as to maintain the flow area of such passage. A rigid annular back-up ring fits and outwardly abuts within and against the gasket in such a manner as to provide a three-way pressure seal of the gasket in which the ball is sealed off with respect to the flow-passageway, the housing is sealed-off with respect to the ring, and the ring is sealed-off with respect to the tank bottom when the housing is bolt-secured to project from the tank bottom. An operating stem for the ball is provided with a key-like, operating end portion to axially receive a complementary bore of an operating handle.