Pneumatic ball valve connection code: 1 indicates internal thread, 4 indicates flange type, 6 indicates welding, 7 indicates wafer type; Structural code of pneumatic ball valve: floating type: 1 means through flow, 2 means Y-shaped tee, 4 means L-shaped tee, 5 means T-shaped tee; Fixed type: 0 means hemispherical straight through, 6 means four-way flow channel, 7 means straight through flow to, 8 means L-shaped tee, 9 means Y-shaped tee;

Function of full-automatic damper and plugging of internal pressure of damper
The basic functions of the fully automatic damper are as follows:
When vehicles and personnel pass by under full automatic control. Automatic roll over, vehicle or personnel will automatically close after passing by, without manual opening, convenient and applicable.
The electrical and mechanical double locking is completed between the two air doors, which completely prevents the two doors from turning over, and it is safe and secure.
It has the function of manual control, and can manually control the opening and closing of the damper by using the remote control or manual button.
Each air door adopts a reverse air design, which ensures that the air door can be opened and closed manually in case of power failure in the mine.
It has the function of emergency unlocking. Under special circumstances, the locking of two sets of air doors can be unlocked, so that both sets of air doors are locked in the open state.