Plug valve with removable lip insert means
US4478388A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Nov 1, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/0271
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plug valve and method of making same are provided wherein such valve has lip inserts removably installed between an outer housing of the valve and diametrically opposed ports in a plastic sleeve which serves as a liner for the inside surface of the outer housing. The ports are aligned in a flow passage through the valve and a rotatable plug member is rotatably supported within the sleeve. The lip inserts serve the multiple purpose of protecting edge surfaces defining the ports of the sleeve against impingement of fluid flowing through the flow passage, holding the sleeve against rotation, preventing cold flow or extrusion of parts of the plastic sleeve in the flow passage and providing smooth uninterrupted flow of fluid through the valve flow passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.