Pressure equalized flow control valve
US5346178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Sep 28, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/142
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flow control valve such as a ball valve (12) for controlling fluid flow through a flow line (16). The control valve includes a flow chamber (18), an upstream passage (19), a downstream passage (20), a cylindrical body (24), a retainer (26) sealingly engaging the outer annular surface of the flow line and secured to the valve body by a pair of flanges (28), a flow control ball (32) rotatably disposed within the flow chamber for controlling fluid flow through the passages, an operating member (42) for rotating the ball between open and closed positions and means (70)for equalizing the pressure in the valve chamber. The ball includes a centrally bored flow passageway (36) for communicating fluid through the passages and is rotatably supported within the chamber by an annular upstream seat carrier (48) and an annular downstream seat carrier (50). Each seat carrier includes a ball seat (52) positioned within an annular recess (54) provided on the inwardly facing surface (55) of the seat carrier and an O-ring (56) positioned within an annular recess (58) provided on an axially facing surface (59) of the seat carrier. Each seat 52 includes an inwardly facing surface (60)that abuts the o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.