The Thompson valve normally closed, self-sealing, metering valve
That can start and stop aggressive media flow while the vessel
Remains constantly pressurized. This valve is designed for use with
An abrasive cut off switch which allows for blow- down capability
And is available with tungsten carbide sleeves. The

A low cost straight through valve with a rubber internal diaphragm with hand wheel adjustment. Available in 1/2", 1 and 1/4" sizes

For arduous service suitable for all abrasive media. A full bore valve with rubber sleeve liner to withstand extreme service conditions. For opening or closing the aperture to tune the flow of abrasive adjustment is made by handwheel operation.