Flange should be checked on schedule
Flanges can not be stored for long periods and should be inspected on schedule. Often the exposed surfaces should be clean, cleared of dirt and neatly stored in a ventilated, dry place in the house. Stacking or open storage is strictly prohibited.
Flange ball valve, globe valve, gate valve use, only for full open or fully closed, do not agree to do to adjust the flow to avoid erosion of the sealing surface, accelerated wear and tear.
The flange is easy to draw, simple to manufacture, low in cost and widely used. However, the flange is not suitable for the chemical process piping system with high supply and demand, flammable, explosive and high vacuum requirements, and highly and extremely harmful situations.
Seal surface type plane and raised face.
Flange structure is simple, small size, light weight; close and reliable, the current ball valve sealing surface material widely used plastic, good sealing, vacuum system has also been widely used; easy maintenance, ball valve structure is simple, the ring is generally active The removal and replacement are more convenient; in the fully open or fully closed, the sealing surface of the ball and seat and the media isolation.