进口天然气球阀，液化气，燃气专用球阀性能描述 Performance description

天然气球阀（液化气，燃气专用球阀）全通径设计，采用PTFE(特氟隆)等材料作为密封，具有良好润滑性和弹性,与球体摩擦系小。本产品具有防静电结构，当阀门的内密封体旋转摩擦产生静电时，利用一个导电装置和大地连通，从而避免静电导致天然气火灾；具有防火结构，当软密封材料被烧坏后，球阀仍能保持密封，避免火灾扩大 RETZ The natural gas ball valve (LPG, gas ball valve) is designed with full bore, and PTFE (Teflon) and other materials are used as seals. It has good lubrication and elasticity, and has a small friction system with the ball. This product has an anti-static structure. When the inner seal of the valve rotates and rubs to generate static electricity, a conductive device is used to connect with the earth, so as to avoid the natural gas fire caused by static electricity; It has a fireproof structure. When the soft sealing material is burnt out, the ball valve can still remain sealed to prevent the fire from expanding

执行标准 Executive standards

设计标准 Design Rating∶ASME B 16.34

结构长度Face to Face∶ASME B16.10

法兰标准Flanged Ends∶ASME B16.5

检查和试验 Inspection & Testing∶API 598

进口天然气球阀，液化气，燃气专用球阀阀杆结构 Stem structure

采用下装式阀杆防飞出倒密封结构，即阀杆是从阀体内部倒装，并在阀杆的尾部加工有锥面台阶，这样的设计当阀腔压力异常升高或在停机检修时，阀杆不会被冲出；这种结构同时可实现阀杆自密封，阀腔压力越高阀杆的密封性能就越好，而且这种倒密封结构可以有效的防止阀杆和阀体的摩擦，从而起到降低阀门操作扭矩的作用 retz品牌 The bottom mounted valve stem anti fly out sealing structure is adopted, that is, the valve stem is installed upside down from the inside of the valve body, and the taper step is machined at the end of the valve stem. In this design, when the pressure of the valve chamber rises abnormally or the valve stem is shut down for maintenance, the valve stem will not be flushed out; This structure can also realize the self sealing of the valve stem. The higher the valve chamber pressure, the better the sealing performance of the valve stem. Moreover, this reverse sealing structure can effectively prevent the friction between the valve stem and the valve body, thus reducing the valve operating torque

阀杆密封填料标准配置材料为PTFE，是由一组V型填料和填料垫组合而成，这样能有效的将填料压盖的预紧力转化为阀杆的密封力。防火型及硬密封阀门将采用柔性石墨作为填料和倒密封垫  The standard configuration material of the valve stem sealing packing is PTFE, which is composed of a group of V-shaped packing and packing pads. This can effectively convert the preload of the packing gland into the sealing force of the valve stem. Fireproof and hard seal valves will use flexible graphite as the packing and back sealing gasket

阀座结构 Valve seat structure

阀座采用弹性槽减压设计，在低压和高压下均能提供可靠地密封，并且具有自动泄压的功能，当阀腔压力异常升高时，阀腔介质能依靠本身的压力挤压弹性阀座而自动泄压，从而确保了阀门安全并且有效的降低了阀门的操作扭矩  The valve seat is designed with elastic groove decompression, which can provide reliable sealing under low pressure and high pressure, and has the function of automatic pressure relief. When the pressure of the valve chamber rises abnormally, the medium in the valve chamber can automatically relieve the pressure by squeezing the elastic valve seat with its own pressure, thus ensuring the safety of the valve and effectively reducing the operating torque of the valve

所有阀座在径向方向均设有V型切口这样的设计，可防止软密封阀座材料因受热膨胀而导致阀门卡死不能动作  All valve seats are equipped with V-shaped notch in the radial direction, which can prevent the valve from being stuck and unable to act due to thermal expansion of soft sealing valve seat materials

防火结构 Fireproof structure

带有防火结构设计。当发生火灾或其他因素导致阀门温度过高使软密封阀座受损时，球体会随着管道内介质压力的推动与阀体金属密封面接触形成第二级金属对金属密封，从而保证阀门在软密封阀座受损后仍然具有良好的密封性能；同样在阀门阀体和阀盖之间（中道）采用止口法兰、金属对金属二级密封设计，这样的设计可对阀座和中道垫片提供恒定的预紧力，防止阀座和中道垫片被无限压缩而失效，同时有效的降低了阀门因管道震动、扭转等其他外力因素对中道垫片造成的损坏，从而起到保护阀座和中道垫片，降低阀门操作扭矩，延长阀门使用寿命的作用  With fireproof structure design. When the soft seal valve seat is damaged due to the high temperature of the valve caused by fire or other factors, the ball will contact the metal sealing surface of the valve body to form a second level metal to metal seal with the push of the medium pressure in the pipeline, so as to ensure that the valve still has a good sealing performance after the soft seal valve seat is damaged; Also, the design of lip flange and metal to metal secondary seal is adopted between the valve body and bonnet (middle channel). This design can provide a constant preload on the valve seat and middle channel gasket, prevent the valve seat and middle channel gasket from being invalid due to infinite compression, and effectively reduce the damage to the middle channel gasket caused by other external forces such as pipeline vibration and torsion, thus protecting the valve seat and middle channel gasket, Function of reducing valve operating torque and prolonging valve service life

防静电结构 Anti static structure

当阀门正常操作时，球体和软密封阀座摩擦会产生静电火花。若客户有要求或管道介质为易燃气体时，可定制防静电结构。此结构采用弹簧+钢球静电引出装置，使球体和阀杆、阀杆和阀体之间形成静电通道，以达到消除静电积累、确保系统安全的目的 When the valve operates normally, the friction between the ball and the soft seal valve seat will produce electrostatic sparks. If the customer has requirements or the pipeline medium is flammable gas, the anti-static structure can be customized. This structure adopts spring+steel ball electrostatic lead out device to form an electrostatic channel between the ball and the valve stem, and between the valve stem and the valve body, so as to eliminate the accumulation of static electricity and ensure the safety of the system

球芯结构 Ball core structure

球体均经磨床精密加工而成，表面采用镜面抛光技术，有效的保证了球体的圆度。根据客户的不同需求，可提供实心球和空心球。硬密封球阀球体均采用实心球，表面经硬化喷涂处理，并和阀座密封面精密配磨而成 The spheres are precision machined by grinding machine, and the surface is polished by mirror, effectively ensuring the roundness of the spheres. According to the different needs of customers, we can provide solid balls and hollow balls. The hard seal ball valve balls are solid balls, the surface is hardened and sprayed, and they are precisely grinded with the sealing surface of the valve seat

主要零部件材料 Main parts and materials