进口截止止回阀。截止止回多功能阀性能描述 Performance description

截止止回阀一阀两用,可代替一个截止阀和一个止回阀阀杆和阀瓣的连接设计成可以隔开的结构，既可以切断，又可以止回 RETZ One stop check valve can be used for two purposes. It can replace one stop valve and one check valve. The connection between the stem and disc of the check valve is designed to be separated, which can be cut off and checked

作截止阀时：在关闭阀门时，阀杆可顶住阀瓣运动，使阀瓣密封面与阀座密封面密合，达到关闭阀门状态。此时，阀门起切断管路中介质的截止阀作用 When acting as a stop valve: when closing the valve, the valve stem can support the valve disc to move, so that the sealing surface of the valve disc and the sealing surface of the valve seat can be closed. At this time, the valve acts as a stop valve to cut off the medium in the pipeline

作止回阀时：当开启阀门时，是阀杆与阀瓣脱开，此时，阀门可作为防止介质倒流的止回阀用 When used as a check valve: when the valve is opened, the valve stem and disc are separated. At this time, the valve can be used as a check valve to prevent backflow of media

进口截止止回阀。截止止回多功能阀技术要求Applicable Standards

设计标准 Design Rating∶EN12516、DIN3356、ASMEB16.34；

结构长度Face to Face∶EN558、DIN3202、ASMEB16.10；

法兰标准Flanged Ends∶EN1092-1、GB/T9113、DIN2543-2545、ASMEB16.5 ；

检查和试验 Inspection & Testing∶EN12266、DIN 3230、AIP598

规格尺寸 Size : 2～12"

公称压力 Nominal pressure：PN16～PN40、CL150～300LB

适应温度 Applicable temperature ：-20～350℃

波纹管的结构 Structure of bellows

阀芯结构 Valve core structure

锥面密封∶密封面不残留杂质∶在趋于关闭时，密封面具有自清洁作用，实现线性密封 Conical sealing: no impurities remain on the sealing surface: when the sealing surface tends to close, the sealing surface has self-cleaning effect to achieve linear sealing

平衡双阀瓣密封∶小阀瓣缓解压力后带动大阀瓣轻松打开retz品牌  Balanced double disc sealing: small disc releases pressure and drives large disc to open easily

平面软密封∶开启和关闭时软密封表面可防止火花产生，适用于气体介质或耐腐蚀要求的工况 Flat soft seal: the soft seal surface can prevent sparks when opening and closing, and is suitable for working conditions with gas medium or corrosion resistance requirements

主要零部件材料 Main parts and materials