A Brief Introduction to Metal Seal Sanitary Butterfly Valves

A Brief Introduction to Metal Seal Sanitary Butterfly Valves
Metal seal sanitary butterfly valve seal as the smaller elasticity, generally used eccentric structure, especially with three-dimensional eccentric structure is ideal. Metal seal sanitary valve was originally used for high-pressure steam pipe, the price is more expensive, it is not easy to damage the sealing surface in operation, but its manufacturing accuracy is higher, once the leakage is difficult to repair.

1) Cryogenic valve housing structure shape. The correct choice of materials on the normal and reliable control valve has a very important significance. Sanitary butterfly valve structural features and cut-off valve, compared to the valve, not only to avoid the irregular shape, the shell wall thickness is not uniform, resulting in low temperature shrinkage, temperature stress caused by deformation, but also sanitary valve volume Small, about the basic shape of the valve is called, and thus heat capacity is small; to cold consumption is also small; shape rules and easy to control valve on the cold measures.

2) The choice of stem bush: according to the reflect of user, some low-temperature sanitary regulating valve are in the running, the control valve rotating parts of the sticky, occlusal phenomenon occurred, mainly due to: matching material choice is unreasonable, too small, as well as the accuracy of processing and other reasons. In the development of low-temperature control valve, a series of measures are taken to prevent the above phenomenon. For example, we choose Adamant valves with low coefficient of friction and self-lubricating on the upper and lower bushings of valve stem, so it can be applied to some special needs of cryogenic valve.