Simple flange butterfly structure, small size, light weight, only a few parts. And just rotate 90 ° to quickly open and close, easy to operate, while the fluid control valve has a good feature. Butterfly valve plate mounted on the pipe diameter direction. Cylindrical channel in the valve body, disc-shaped disc around the axis of rotation, rotation angle between 0 ° ~ 90 ° Hebei Supply Q235 flat flange, rotate to 90 °, the valve is fully open state licensing. Flange butterfly in the fully open position, the disc thickness is only when the medium flows through the body resistance Q235 flat flange manufacturers, so by the valve pressure drop generated by a small flange Q235 tablet, it has a better flow control characteristics. Butterfly shells sealed and two metal seal type. Resilient seal valves, seals can be mounted on the body or attached to the disc perimeter. 1 0.25MP-1.0MPa, PN is carbon steel, austenitic stainless steel welded flange allows the use of grade Ⅰ forgings. 2 In addition to these provisions, as 1.6MPa-6.3MPa, PN welded flange should conform Ⅱ Ⅱ grade or above grade level requirements forgings. (3) one of the following conditions are met Q235 flat flange for sale cheap, Ⅲ and forgings shall comply with requirements: (1) Nominal pressure PN ≥ 10.0MPa flange forgings, (2), PN-chromium-molybdenum> 4.0MPa of Steel Forgings, (3) Nominal pressure PN> 1.6MPa Working temperature ≤ -20 degrees Celsius and ferritic steel forgings. Q235 flat flange | Hebei Guotai | Q235 flat flange is provided by the manufacturer Hebei Cathay. Cathay Pacific Pipeline Equipment Co., Ltd. Hebei (www.hbgtgd.com) in the elbows, flanges, tees, reducers, crosses, the socket, forgings, threaded pipe fittings and other products and other industries have a higher visibility, integrity management, both quality service, welcome to inquire, or consult our "Business League call" it!