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The F Series Iris Diaphragm Valve, specifically designed to gland around large diameter pipes.
It has a flexible diaphragm which is closed around the pipe creating an effective dust tight seal, and the same valve is able to satisfy several different pipe diameters.

The Inner and outer bodies are made from carbon steel
The Inner and outer body rings are supported on sealed for life roller bearings
Drive mounting plate made from carbon steel and able to accept a double acting pneumatic cylinder or an electric linear actuator

Used for creating a gland seal around large diameter pipes
Used for mounting on shot-blast cabinets to ensure no dust escapes into the atmosphere when glanding on tubes It will create a seal around pipes up to 75% of the valve bore diameter
It will handle a number of pipe diameters with the same valve

Able to be manufactured from stainless steel
Coatings are available for corrosive environments
Diaphragms are available from many materials in our standard range Electric linear actuator can be supplied with a controller unit
Available in sizes 610mm (24”), 762mm (30”) and 1270mm (50”)

It is Non-jamming 100% dust tight seal
Easy to operate and maintain
Diaphragm is inexpensive and easy to replace

A dust tight seal is created around the pipes
Robustly constructed
As the ability to gland around pipes of various diameters using the same valve
As a well proven and reliable design