Depending on the case of operation different valve types can be used.

V1 valve

Well defined minimum height of stroke because of three integrated spacers
Rotary protection device optional
Height of stroke is adjusted to the gas flow rate
Applicable for many purposes

A3 Valve (Caged valve)

The A3 valve consists of a non-moving cage and a moving orifice cover
Low sign of mechanical wear
Also Applicable when the process agents are polluted

A4 Valve (Caged valve)

Lower pressure drop version of the A3 valve. Venturi shaped orifice in
the tray deck achieves this lower pressure drop.

Fixed Valve SRV
Fixed valve with a predetermined opening
Suitable for polluted or orrosive agents

All valves can be supplied in different material thickness.