GUILLOTINE GATE:
Guillotine gates are used in flue and duct systems, where positive shut-off isolation is necessary.
They are usually on/off type, [i.e.] completely open or completely closed, and do not regulate flow.
They provide 99% airtightness.
ACTUATORS:
The damper actuators can be the on/off type or regulation type to which a positioner/position transmitter may be added.
Wheel and gearbox: suitable for the low levels of automation and for small-sized dampers.
Pneumatic cylinder: (single or double-acting).
Electric: electric motor with gearbox, with a manual wheel for an emergency override.