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Pneumatic bus door emergency valve, fast relase valve, quick release valve

Door control valve: 

In emergency: Open valve cover turn relief valve clockwist, open the door manually

After use: Open inner relief valve clockwist close outer relief valve counterclockwise, keep the door entirely open. Close inner relief valve. 

Have eight different Door control valve: 
KD100, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD200, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD300, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD400, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD500, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD600, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD700, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD800, Pneumatic bus door emergency valve, fast relase valve, quick release valve
KD900, Pneumatic bus door emergency valve, fast relase valve, quick release valve

We are the nominated bus/coach door system, bus door pump, bus door cyliner,door parts for Yutong, Ankai, Higer, Kinglong, Shaolin Bus, Youngman,Neoplan,Zhongtong bus,Huanghai bus, Golden dragon bus, Daewoo,Marcopolo,Asiastar,Tata, Mcv.Iveco.Toyota coaster