Overview QB1 QB1 exhaust valve exhaust valve for drum-type body, its internal structure are mainly stainless steel float. The valve is divided into two kinds of threaded and flanged exhaust valve. QB1 type of application and the operating temperature of the pipeline ≤80 ℃, as the exclusion of gas pipeline equipment. At the start of the working principle of injection tube, float float slowly upward, then this has been the exhaust valve. When the pressure reaches a certain time, float withstand tight rubber ring, indicating that all the air has been discharged from the exhaust nozzle. ? 1 Body parts and materials, cast iron 2 valve covers, cast iron 3 float, stainless steel 4 plugs, rubber exhaust nozzle 5, 6 brass screws, nuts, steel yuan major Dimensions:? Mm Connection DN HD D1 Z-Φd flange Equation 15 245 195 1604-1820245 1951604-1825 2451951604-18 wire port type 15,20 245 - - - 25,32 245 - - - 40 50 310 - - - renderings :( below) Product Ordering Information: ㈠QB1 exhaust valve product name and model ㈡QB1 nominal ㈢QB1 exhaust valve exhaust valve DN ㈣QB1 vent exhaust connection flange standard ㈤QB1 Valve body material ㈥QB1 rated flow coefficient ㈦QB1 exhaust valve exhaust valve exhaust valve working medium ㈧QB1 medium temperature ㈨QB1 exhaust valve with an attachment so your selection is correct.