PNEUMATIC ACTUATORS

Door mechanism MD-05 Door mechanism MD-06, MD-07, MD-08

Pneumatic remote actuator PPD-125 Pneumatic remote actuator PPD-135

Door mechanism MD-05

The mechanism includes a board where the following items are mounted:

• electro-pneumatic valve to control travel direction (opening, closing)
• reverse valve intended to open doors automatically when a passenger is jammed in the doorway during the wing closing.
• pneumatic cylinder as a power mechanism with an unit of microswitches to switch on the light when the door in the position "closed".

Technical characteristics
Operating environment	air
Operating pressure, MPa (kgf/cm2)	0,6…0,8 (6…8)
Rod operating stroke, mm	125
Ambient temperature, °C	from -40 up to +45
Electromagnet supply voltage, V	12
Current during the whole operation range, A	maximum 0.9
Mass, kg	maximum 7

Door mechanism MD-06, MD-07, MD-08

• electro-pneumatic valve(s) to control travel direction (opening, closing)
• reverse valve(s) to open doors automatically when a passenger is jammed in the doorway during the wing closing
• pneumatic cylinder (or cylinders, it depends on the number of wings) as a power mechanism with a unit of microswitches to switch on the light when the door in the position "closed"
• a shutoff valve is installed on the cylinder, it does not allow the wings in the position "closed" to be opened casually while the bus pneumatic system pressure is lost.

Pneumatic remote actuator PPD-125

The pneumatic remote actuator is used as an actuating mechanism of two-way action for manipulators, automated lines etc., for example for opening and closing of bus doors.

Pneumatic remote actuator PPD-135

The actuator includes electro-pneumatic valve mounted on pneumatic cylinder and is used as an actuating mechanism of two-way action for manipulators, automated lines, for opening and closing of trolley-bus doors etc.