Butterfly valve stem is rotated together with the disc for opening and closing parts to achieve the valve open, close and adjust. Lined butterfly valve is in flow components, body, disc, the valve stem has a thicker lining technology polymer material, excellent corrosion resistance, applicable to any concentration of acid, alkali, salt and oxidation squeeze, reducing organic solvents and other media, is to make the gas, liquid, semi-fluid piping and containers in chemical, petroleum, pharmaceutical, food, iron and steel smelting, paper, water and electricity shut-off and regulating systems ideal device to use, and can replace the valve closing valves, and other types of cut adjustment valve. Lined Butterfly Valve Features: 1, small size, light weight, lightweight operation, easy installation and maintenance. 2, sealing performance, reliable, zero leakage, long service life. 3, linear flow characteristics tend to adjust optimal performance. 4, the structure is simple, fast switching, 90 ° rotating headstock. 5, can replace the valve, closing valves, plug valves, pinch valves and diaphragm valves, and other uses. 6, can be configured pneumatic, electric devices according to user needs, to meet the needs of remote and programmed. 7, replacement parts lining material can be applied to a variety of media. Lined Butterfly Valve technical parameters and performance standards lined with rubber lined butterfly valve connection type "A" type connection on the folder "LT" type wafer flanged connection type "A" on the folder connection "LT" type wafer connection Nominal Diameter (mm) DN40 ~ 2000 DN40 ~ 600 DN50 ~ 1200 DN50 ~ 1000 DN50 ~ 600 Nominal pressure (Mpa) PN1.0, PN1.6 valve materials gray cast iron, carbon steel, stainless steel lining material PTFE (F4), FEP (F46), PCTEF (F3), PVDF (F2), GXPP, GXPO, UHMW-PE rubber anti-corrosion lining material suitable media see fresh water, sewage, water, air, steam, food, medicines, oils, acids , bases, salts working temperature (℃) -15 ~ 150 ℃ design and manufacture GB / T12238-1989, Q / ZXD 03-1999, API 609, MSS SP-67 structure length GB / T 12221-89 Flange JB / T 82.1-94, GB / T9113.1-2000 pressure test GB / T 13927-1992 Transmission manual, worm, pneumatic, electric