进口波纹管球阀，波纹管密封球阀性能描述 Performance description

波纹管球阀（波纹管密封球阀）的波纹管和阀杆的下部采用氩弧焊接,焊缝必须焊透。波纹管的上部法兰与石墨垫片、阀盖和支架形成静密封,使阀体中的介质和外部隔绝。阀体中的介质不因阀杆和填料函有间隙而泄漏。如果因特殊情况引起波纹管破裂,阀门上部的填料函还可起到应急作用。阀杆上部沿轴向加工2个直槽,拨销使阀杆只能沿着轴向上、下移动而不能沿径向转动。阀杆下部加工2个螺旋槽,拨销固定在球体上,拨销可在螺旋槽内自由移动。球体坐落在圆锥滚子轴承上,减小球体对阀杆的摩擦扭矩。当阀门关闭时,阀杆由电动装置带动向下运动,阀杆的螺旋槽带动球体上的拨销使球体沿球的轴线转动90°,球体转到图中虚线位置,球阀关闭。反之则球阀开启 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

进口波纹管球阀，波纹管密封球阀技术规范 Technical specifications

设计标准∶DIN3356  Design standard: DIN3356

结构长度∶EN558-2-1995  Structure length: EN558-2-1995

连接法兰∶DIN2543-2546  Connecting flange: DIN2543-2546

试验和检验∶DIN3230 Test and inspection: DIN3230

规格尺寸：F2～12" Size: F2～12" 

工作温度：-29～180℃  Operating temperature: -29～180℃

工作压力：0-160Bar  Working pressure: 0-160Bar

特点 Features

波纹管球阀具有三级密封 Bellows ball valves have a three-stage seal

第一级密封设在阀杆下端处，采用锥面密封，属于金属与金属的硬密封，且压力越大密封越好 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

第二级密封为波纹管密封，由于进入波纹管的流体通过第一道毛细管式的密封，压力大大降低，成为稳恒的流体，波纹管受流体的压力不是交变应力，而是稳恒定力，这样大大改善了波纹管受力工况 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

第三级密封是阀门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