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    Wafer type butterfly valve material introduction

    Posted by Bundor valve
    A complete wafer butterfly valve is mainly composed of valve body, valve plate, valve seat, valve shaft, and actuator. For the introduction of wafer butterfly valve materials, of course, we must start with these parts. Now,we will introduce wafer type butterfly valve for you .

    The valve body materials of the wafer type butterfly valve are mainly gray cast iron, ductile iron, cast steel, and stainless steel. Usually, the wafer butterfly valve made of gray cast iron and ductile iron is mainly used in low-pressure water system pipelines;  The wafer butterfly valve made of cast steel and stainless steel is used in medium and high pressure pipelines, suit for  water, steam, oil and other media.
    The disc of wafer type butterfly valve are mainly made of ductile iron and stainless steel. The stainless steel disc is more suitable for working conditions than ductile iron disc.
    The seat material of the wafer butterfly valve can be described in details.  According to the material of the sealing surface, that is, the material of the valve seat, the wafer butterfly valve can be divided into two types: soft seal and hard seal.
    There are mainly three kinds of soft sealing valve seat materials, EPDM rubber, nitrile rubber, PTFE; EPDM rubber is mainly used for water, gas, etc., nitrile rubber is mainly used for oil, PTFE Ethylene is mainly used in corrosive media; the advantage of the soft-sealed valve seat is that it has good sealing performance, but the disadvantage is that it cannot be used in high temperature and high pressure working condition.
    There are two types of hard sealing valve seat:hard metal sealing and body material sealing. These types of sealing valves are mostly used in medium and high pressure and high temperature pipelines.
    The material of the valve shaft of the wafer butterfly valve is basically stainless steel, such as  stainless steel 304, 316, 420 and so on.
    The actuator material of the wafer butterfly valve mainly refers to the handle. The common handle materials are gray iron, ductile iron, aluminum alloy, and stainless steel.
     
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