進口波紋管球閥，波紋管密封球閥性能描述 Performance description

波紋管球閥（波紋管密封球閥）的波紋管和閥桿的下部采用氬弧焊接,焊縫必須焊透。波紋管的上部法蘭與石墨墊片、閥蓋和支架形成靜密封,使閥體中的介質和外部隔絕。閥體中的介質不因閥桿和填料函有間隙而泄漏。如果因特殊情況引起波紋管破裂,閥門上部的填料函還可起到應急作用。閥桿上部沿軸向加工2個直槽,撥銷使閥桿只能沿著軸向上、下移動而不能沿徑向轉動。閥桿下部加工2個螺旋槽,撥銷固定在球體上,撥銷可在螺旋槽內自由移動。球體坐落在圓錐滾子軸承上,減小球體對閥桿的摩擦扭矩。當閥門關閉時,閥桿由電動裝置帶動向下運動,閥桿的螺旋槽帶動球體上的撥銷使球體沿球的軸線轉動90°,球體轉到圖中虛線位置,球閥關閉。反之則球閥開啟 RETZ The lower part of the bellows and valve rod of the bellows ball valve (bellows sealed ball valve) shall be welded by argon arc, and the weld must be fully welded. The upper flange of the bellows forms a static seal with the graphite gasket, bonnet and support to isolate the medium in the valve body from the outside. The medium in the valve body shall not leak due to the clearance between the valve stem and the stuffing box. If the bellows breaks due to special circumstances, the stuffing box on the upper part of the valve can also play an emergency role. Two straight grooves are machined on the upper part of the valve stem along the axis, and the shift pin makes the valve stem move up and down along the axis instead of rotating along the radial direction. Two spiral grooves are machined at the lower part of the valve rod. The shift pin is fixed on the ball and can move freely in the spiral groove. The ball is located on the tapered roller bearing to reduce the friction torque of the ball on the valve stem. When the valve is closed, the valve rod is driven downward by the electric device. The screw groove of the valve rod drives the pin on the ball to make the ball rotate 90 ° along the ball axis. The ball turns to the dotted line position in the figure, and the ball valve is closed. On the contrary, the ball valve opens

進口波紋管球閥，波紋管密封球閥技術規范 Technical specifications

設計標準∶DIN3356  Design standard: DIN3356

結構長度∶EN558-2-1995  Structure length: EN558-2-1995

連接法蘭∶DIN2543-2546  Connecting flange: DIN2543-2546

試驗和檢驗∶DIN3230 Test and inspection: DIN3230

規格尺寸：F2～12" Size: F2～12" 

工作溫度：-29～180℃  Operating temperature: -29～180℃

工作壓力：0-160Bar  Working pressure: 0-160Bar

特點 Features

波紋管球閥具有三級密封 Bellows ball valves have a three-stage seal

第一級密封設在閥桿下端處，采用錐面密封，屬于金屬與金屬的硬密封，且壓力越大密封越好 retz品牌 The first stage seal is set at the lower end of the valve rod, and the cone seal is used. It belongs to metal to metal hard seal, and the greater the pressure, the better the seal

第二級密封為波紋管密封，由于進入波紋管的流體通過第一道毛細管式的密封，壓力大大降低，成為穩恒的流體，波紋管受流體的壓力不是交變應力，而是穩恒定力，這樣大大改善了波紋管受力工況 The second stage seal is a bellows seal. As the fluid entering the bellows passes through the first capillary seal, the pressure is greatly reduced and becomes a stable fluid. The pressure of the fluid on the bellows is not an alternating stress, but a stable constant force, which greatly improves the stress condition of the bellows

第三級密封是閥門通常采用的填料密封 The third stage seal is the packing seal normally used for the valve

主要零部件材料 Main parts and materials