One, the product uses 
 The FHQ series of anti-tempering device for tempering of special devices to prevent the explosion and burning of coal mine gas pipeline, used widely. Its mechanism: the use of the cooling effect of the copper network, cut off from the flame propagation. This set of equipment and explosion-proof device to belong to the gas drainage and utilization of the system necessary safety facilities. Suitable for installation in gas output pipe system is usually installed near the location from the user or the gas pump, play down, to protect the mine drainage pump station and the user's security. 
 Second, the main parameters 
 The anti-tempering device is divided into FHQ-0 ~ 12 - 13 specifications, corresponding to the gas drainage pipeline import and export diameter: DN150-of DN1000. 
 Model FHQ-1 FHQ-FHQ-FHQ-FHQ-FHQ-6 FHQ-7 FHQ-8-9 FHQ FHQ-10 FHQ-11 FHQ-12 
 Length (mm) 1550 1650 1750 1780 1815 1860 1920 1890 2050 2150 2250 2350 
 Connecting pipe diameter (mm) 200 250 300 350 400 450 500 600 700 800 900 1000 
 Copper wire mesh layers (layers) 666,666,666,666 
 Copper wire network diameter (mm) 400 450 500 550 600 650 700 895 995 1195 1295 1395 
 Quality (Kg) 310 330 380 450 510 620 860 1300 1650 1750 1850 1950