Omnibus door pressurizing medium actuating arrangement, has operating circuit switched over device provided with emergency valve and control valve, where pressurization is drained for locking control valve over emergency valve

摘要

The arrangement has an operating circuit of a pressurizing medium for actuating a door, and an operating valve (18). The operating circuit is switched over a valve device. The valve device has an emergency valve (36) and a force-switchable control valve (28) for switching the operating valve over a pressure line (24). The control valve is switched between a position for activation and another position for locking pressurization in the pressure line. The pressurization is drained in the position for locking the control valve over the emergency valve.