I. Introduction FBQ series explosion-proof seal is installed in the gas drainage pump suction and discharge end of the pipeline, the bottom of the seal by the explosion protection Inoue underground, drainage pump station equipment and user safety; when the gas via gas drainage inlet pipe into the water, and then precipitated from the water, through the outlet pipe excluded from the seal inlet vent piping isolation; when the explosion occurred at one end, the seal can not form a coherent isolation explosion, this time the pressure relief device to open the plastic sheet was washed relief, protecting Inoue underground, drainage pump station equipment and user safety. Second, the product structure FBQ series explosion-proof seal structure is simple, safe, reliable, affordable. It consists predominantly of intake and exhaust pipes, slag mouth, safety relief ports, water level and other components. Third, Specifications Model FBQ-1 FBQ-2 FBQ-3 FBQ-4 FBQ-5 FBQ-6 FBQ-7 FBQ-8 FBQ-9 FBQ-10 Ex height (mm) 1150 1200 1300 1350 1400 1450 1600 1800 1900 2000 Explosion-proof tube diameter (mm) 800 900 1050 1100 1200 1250 1350 1550 1750 1850 proof nozzle diameter (mm) 300 350 450 480 500 550 600 700 800 900 Export tube diameter (mm) 200 250 300 350 400 450 500 600 700 800 Explosion-proof device height (mm) 1420 1470 1575 1600 1675 1725 1850 2150 2250 2350 explosion device width (mm) 1050 1180 1330 1380 1480 1530 1650 1950 2150 2200 mass (kg) 320 350 540 600 670 760 890 1500 1750 1800 Note: 1. according to customer requirements and product condition design, manufacturing. 2, the actual machining dimensions prevail.