Marine Butterfly Valve
Marine Butterfly valve can be classified according to a variety of methods, for example, butterfly valve according to the use and role, can be divided into truncation and regulating type; according to the structure of the form is divided into centerline, single eccentric, double eccentric and triple eccentric butterfly valve; according to the sealing material can be divided into rubber sealing butterfly valve, PTFE sealing butterfly valve and metal sealing butterfly valve; according to the form of connection can be divided into wafer butterfly valves, lug butterfly valves, flange butterfly valves; according to the drive can be divided into manual butterfly valves, electric butterfly valves, pneumatic butterfly valves, hydraulic butterfly valves; manual butterfly valve can be divided into handle butterfly valve, lever butterfly valve, worm gear butterfly valve. According to the driving mode, it can be divided into manual butterfly valve, electric butterfly valve, pneumatic butterfly valve, hydraulic butterfly valve; manual butterfly valve can be divided into handle butterfly valve, lever butterfly valve, worm gear butterfly valve.
Overview
Function:
With the emergence of elastic sealing materials such as synthetic rubber and the in-depth study of sealing mechanisms, sealed butterfly valves have appeared. The emergence of elastic metal valve seat and new structural form, so that the butterfly valve in high temperature, low temperature environment is also gradually adopted. At present, the development trend of butterfly valve is that it can be used both for regulating and sealing.
Marine Butterfly valve sealing is achieved by acting on the sealing surface with a certain sealing pressure. Butterfly valve sealing has three forms: ① by the surplus amount of specific pressure. ② by direct pressure or torque will sealing sub-pressure, such as double eccentric, triple eccentric butterfly valves, sealing ring inflatable gas-liquid. ③ rely on the platonic effect using the medium pressure on the sealing ring.
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