Fluorine-lined gate valve
, also known as fluoroplastic lined corrosion-resistant valve, is a method of placing polytetrafluoroethylene on the inner wall of the steel or iron valve pressure-bearing part or the outer surface of the valve inner part by molding, using it to resist strong corrosive media. The unique properties of the product are made into various types of valves and pressure vessels. It is mainly suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, qing hydrofluoric acid and various organic acids, strong acids and strong oxidants at temperatures of -50℃～+150℃. Common fluorine-lined materials are FEP (F46), PCTFE (F3 ), FEP is also suitable for use in pipelines with various concentrations of strong alkali organic solvents and other corrosive gases and liquid media. Product introduction: Fluorine-lined flange gate valve is a common opening and closing valve. It uses a wedge-shaped gate sealed on both sides to connect or cut off the medium in the pipeline. The wedge gate valve does not allow a small amount of opening to throttle in the pipeline. It is used for the device to avoid the damage of the sealing surface due to the erosion of the high-speed flowing medium. FEP(F46), PCTFE(F3) fluorine lined flange gate valve is suitable for various concentrations of aqua regia, qing hydrofluoric acid and various organic acids, strong acids and strong oxidants at -50℃~+150℃. FEP is also suitable for various It can be used in pipelines with strong alkali organic solvents of various concentrations and other corrosive gases and liquid media. Main features: 1. The valve body has two shapes: flat body and round body: GB valve adopts round body, ANSI pound valve DN≤300Lb adopts flat body, DN≥400Lb adopts round body, the inner cavity of valve body and bonnet and The parts directly in contact with the medium, such as the gate plate and the outer surface of the valve stem, are all lined with fluoroplastics such as FEP (F46). 2. The sealing pair is FPF (F46)/FEP (F46) or other material combination, with small friction coefficient and low opening and closing torque. 3. The packing adopts PTFE (F4) standard packing, which has good sealing performance and convenient maintenance and replacement. 4. The elastic gate can compensate the deviation of the wedge angle between the sealing surface of the gate and the sealing surface of the valve seat, with good match and ideal sealing effect. 5. The medium can pass through the gate valve from any direction on both sides, which is suitable for the opening and closing device on the pipeline where the direction of the medium may change. Parts material: serial number Part name Grey cast iron cast steel Stainless acid-resistant cast steel Ultra-low carbon stainless and acid-resistant cast steel ZGPPRPLPL1 valve body/end cover HT250WCBCF8CF8MCF3CF3M2 ball/stem 1Cr132Cr131Cr18Ni91Cr18NI12Mo2TI00Cr18NI1000Cr17Ni14Mo23 lining/valve seat PTFE(F 4 ), PCTFE(F 3 ), FEP (F 46 ), PFA (soluble F 4 ) 4 packing/ gland PTFE (F4) PTFE (F4) PTFE (F4) 5 packing 351Cr17NI21Cr17Ni26 movable joint bolt ZCuA110Fa3ZCuA110Fa3ZCuA110Fa37 valve stem nut 351NICr18Ni21Cr18Ni28 fastening bolt 351Cr18Ni21Cr08Ni29 nut WCBWCBWCB
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