The flange should be checked on time

　　Flange can not be stored for a long time, should be checked regularly, often on the exposed surface to be clean, remove dirt, cleanly stored in the indoor dry place, is strictly prohibited or open storage. Flange ball valve, globe valve, gate valve when used only for full open or closed, do not agree to do with the regulation of flow, so as to avoid the erosion of the sealing surface to accelerate wear.Bs10 Table E Plate Flange easy to draw, easy to manufacture, low cost, widely used; but the rigidity is poor, it shall not be used for supply and demand, flammable, explosive and high vacuum requirements of the chemical process piping system and height, extreme hazards. Sealing surface type has a plane and auricle. Flange structure is simple, small size, light weight; close and reliable, the current ball valve sealing surface materials widely used plastic, good sealing, in the vacuum system has also been widely used; easy maintenance, ball valve structure is simple, the seals are generally activities Of the demolition and replacement are more convenient; in full or closed, the ball and the sealing surface of the valve seat and the media isolation.