How to store blind flanges

　　Blind flanges can not be stored for a long time, should be inspected regularly, often exposed to the processing surface must be kept clean, remove dirt, neatly stored in indoor ventilated dry place, strictly prohibited stacking or open storage. ASME B16.47 A105 Rtj RF Forged Blind Flange ball valves, globe valves, gate valves when used, only for full open or full closed, do not allow for regulating the flow, so as to avoid erosion of the sealing surface, accelerated wear and tear. Blind flanges are easy to take materials, simple to manufacture, low cost and widely used, but their rigidity is poor, so they can not be used in chemical process piping systems with high requirements of supply and demand, inflammable, explosive and high vacuum, and high and extremely hazardous occasions. The sealing face type has plane and convex surface. The blind flange is simple in structure, small in volume and light in weight; compact and reliable.

　　At present, the sealing surface material of ball valve is widely used in plastic, good in sealing and has been widely used in vacuum system; it is easy to maintain, the ball valve is simple in structure, the sealing ring is generally movable, and it is convenient to remove and replace the ball and the ball when it is fully opened or closed. The sealing surface of the valve seat is separated from the medium.