Sanitary control back pressure diaphragm valve and sanitary control system employing said valve

US4779641A · kind A · utility

Assignee

• Penicillin Assays, Inc. · US

Inventors

• Stanley E. Charm · Boston, US
• Steven Landau · Rydal, US

Key dates

• Filing date: Sep 9, 1987
• Grant date: Oct 25, 1988
• Expiry date: Sep 9, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/4245
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A sanitary control back pressure diaphragm valve employed in a sanitary control system wherein the sanitary valve controls the pressure applied to a fluid in a sanitary contained system, which valve comprises: a valve body having an upper and lower valve member defining a generally conical fluid passageway and a valve seat, the members adapted to move between an open position and a closed position; a diaphragm support between the upper and lower members and a resilient diaphragm on the members on the diaphragm support to provide a seal between the upper and lower members and to provide for relative movement of said valve members between the open and closed valve position, the upper and lower valve members defining a generally conical valve passageway between the valve members, and the valve including a pressurized air inlet to provide controlled air pressure of one member; a sanitary fluid inlet extending in a straight line at an angle into the fluid passageway and a sanitary fluid outlet for the discharge of sanitary fluid from the valve, and optionally, the resilient diaphragm having a plurality of extending channels therein between the upper and lower valve members.