Door opening system
PPT PETOLETKA has developed a system for door handling with the reliable devices and according to the highest standards for safety of the passengers. These devices are already applied and built in the door handling system on road
and railroad vehicles.
The electro-pneumatic door system belong to the standard bus equipment today. These systems are used for
town buses, long-distance and tourist buses.
SYSTEM WITHOUT REVERSIBILITY
This system consists of pneumatic cylinders or the torsional mechanism,
solenoid valve, auxiliary valve from the standard Industrial pneumatics program and the electrical alternate switch NP1. This alternate current switch enables the driver to open the door by the first press on the button and to close it by the next. The both cylinder chambers remain without pressure by activating the auxiliary valve, and then the door could be moved manually.
SYSTEM WITH THE DOOR REVERSIBILITY
Its purpose is to protect passenger maximally from possible injuries beside the door opening and closing function. All the required safety parametars (defined by customer ) are registered and in the case of their disturbance the closing door would return in the previous position.