Pneumatically controlled multiple valve system for fluid transfer
US5139225A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87684
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pneumatically controlled valve system is provided featuring simplified modular construction, reduction of moving parts, improved control of valve operation and increased resistance to corrosive effects of transfer fluid used with the valve. In this invention a 3-way valve system is described which has a valve body constructed of modules of polyvinylidene fluoride polymer (PVDF) removably and operably attached to each other in such a way as to removably contain and retain double diaphragm sliding valve stem assembly of known design which removably seals a fluorocarbon polymer (PTFE) stem to the PVDF seat integral to the valve body to close and open the valve fluid inlet ports and sealingly separates the pneumatic pressurizing gas from the transfer fluid. The operation of the valve is pneumatically controlled through specially designed, removably attached gas inlet and outlet ports with orifices of pre-selected lengths and internal diameters designed to affect the introduction rate of the pressurizing gas which drives the valve stem assembly by the deflection of the upper and lower diaphragms of the valve stem assembly, thus reducing shock to the valve system by rapid valve closure…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.