Pneumatic Differential Engine

Bus Door Actuators - Pneumatic Differential Engine
Bus Door Actuators - Pneumatic Differential Engine

Rugged, robust actuator consists of two opposed cylinders of different diameters with pistons connected by a rack. Operation is controlled by applying air to – or venting air from – the larger cylinder.

Most Vapor bus door actuators are delivered as baseplate assemblies. The baseplate combines the actuator, linkage, and door suspension into a single pre-assembled unit that mounts directly to the bus structure above the door opening. The baseplate assemblies incorporate a linkage that converts rotary motion from the actuator to linear motion of the linkage rod and back to rotary motion of the door shaft.

  • Air metering screws for door speed adjustments
  • Requires air supply pressure between 90 and 120 psi
  • Maximum velocity and minimum force in the mid-point of its range of motion
  • Maximum force and minimum speed at the extremes of its motion

For front or rear door applications
Exceeds all North American requirements

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