One hit the throttle without pressure without pressure damper rod Jinan Dongshan Mine Equipment Co., Ltd. (0531--89004695) careful manufacturing of mining throttle in a common underground mine ventilation. Rod hit a two-way non-pressure damper Products: Rod hit no pressure no pressure damper damper is based on the increase of the ram and slide. Tub on the impact and the backlog by the lance, to achieve the throttle opening; also has simultaneously generated by traction with weights to achieve the throttle is automatically closed. ● structural features 1, mainly by the door frames, doors, balancing mechanism, anti-wind baffle and weight and so on. 2, the main part of the impact ram, stents and other auxiliary equipment rail. 3, door frames welded with steel profiles; doors with steel profiles to build the frame, and steel plate made from folded peripheral cartridge body welding together; adjust the doors and the link connecting the counterweight, so the damper can be reliably Close . ● Features 1, when the locomotive or mine car passed through the side of the tub compression damper ram of the damper open; 2, two-way separated the wind, no longer need to set up reverse throttle; 3, double sealed , a small amount of air leakage; 4, the system is simple, safe and reliable; ● working conditions 1, atmospheric pressure: 0 ~ 3000Pa 2, wind speed: 0 ~ 6.28m / s Jinan Dongshan Mine Equipment Co., Ltd. Tel 0531--89004695 15628887522 http : //www.jndongshan.com