No Pressure Ventilation Door (Balanced pressure ventilation door)
is mainly used for underground outlet inlet lane and the main
outlet inlet air lane between each contact, which is the substitute
for all air door.
The damper is an ideal air door of our country coal mine at
present, it breaks the old traditional damper structure for a long
time.It cleverly put on the pressure acting on the throttle through
the equilibrium structure to convert it into a force, fully
demonstrated the unique air structure.
Non pressure air door is simple to use, safe and reliable, highly
experts and users, is currently used in the airway of an
Non pressure air door is composed of a door frame,door leaf,
connecting rod balancing mechanism and a weight, cylinder ,gas
control box (4 set ) etc.
Main Feature :
1. The ventilation door opening force is small, and the size of the
opening force of the wind pressure has nothing to do with wind
2. Two-way isolation, wind leakage air volume is small, no need to
3. Steel structure, simple structure, strong and durable
4. Close the steady, safe and reliable
5. Good fireproof performance, can effectively prevent the
possibility of fire belt transport lane, prevent fire and other
harmful gases into the roadway
6. Pressure balance type damper is good sound operation, also can
power operation, such as add a set of control system, can realize
the air door automatically open
7. Between two air door which can realize mutual atresia.
The two air doors were opened in two directions.To realize linkage
through the connecting rod and the support arm.Change the length of
the connecting rod can adjust the air tightness.