The performance test of the #cryogenic valves are carrying out inside the RAYS factory. The valves were cooled down to -196 C with liquid nitrogen, and the body was filled helium gas and the shell leak test was performed using a Helium Leak Detector.…

自现代工业革命以来，全球经济实现了迅猛发展。与此同时，人类付出了更为沉重的环境代价。随着温室气体排放量的增加，极端天气变得越来越常见，这似乎已成为人类无法逃避的命运。造成环境污染和温室效应的主要因素是工业排放到大气中的温室气体和污染物。为了减轻全球工业化进程对环境的影响，国际上已经实施了控制挥发性气体排放的策略，并形成了国际标准或规范。尽管一些发达国家在环境控制方面处于领先地位，但我们也发布了并实施了关于 FE 阀门的标准，并且越来越受到用户的认可。每隔两年，在全球工业领域就会举办“中国逃逸排放峰会”，分享他们在逃逸泄漏控制和 LDAR 实践方面的经验、技术和创新。正是由于发布了此类相关标准以及组织了相关活动，逃逸排放的标准化得到了更广泛的研究和发展。逸散排放是指在工业场所中设备出现意外或不真实的泄漏时，任何化学物质或化合物以任何物理形式逸散到大气中的情况。科学词典将逸散排放定义为由于泄漏、蒸发或风力作用而释放到大气中的污染物，以及与之相关的几个概念——例如有机化合物的低蒸发率。典型的化工厂泄漏源包括阀门（填料、法兰连接）、泵密封件、压缩机、法兰/接头以及安全/泄压装置。阀泄漏包括外部泄漏和内部泄漏。对于阀门而言，通常的泄漏评估标准是阀门的可见泄漏。然而，逸散排放严格指的是不可见泄漏，需要借助仪器进行检测，并且通常指的是填料区域和垫片区域的泄漏。填料区域一般是静密封，易于控制/扩散泄漏。而填料函区域是动态密封，阀杆的移动容易导致填料泄漏。一般来说，影响阀填料泄漏的主要因素如下：温度：这种填料在较高温度下具有比与其接触的金属部件更高的膨胀值，并且填料会被压缩。如果填料能在常温下通过逃逸试验，那么它也能在高温下通过逃逸试验（填充物本身的损耗率较小），因此填料很容易在首次常温测试和首次高温测试中都通过。如果从首次高温（400C）降至第二次室温测试时温度降低，填料的收缩量大于金属部件的收缩量，但填料的腔体与首次室温条件相比没有变化。理论上，石墨填料的体积也没有变化。然而，高温后，填料会有一定程度的燃烧损耗，所以填料内部会变得松散。然后填料的弹性会降低，高温降至常温后填料内部的压力也会降低。压板螺栓的扭矩会减小，这容易导致泄漏。然而，通过将该包装应用于室温下的扭矩值，原有的泄漏率能够得到满足。阀位公差：对影响填料泄漏试验的零件的形状和位置公差有以下要求：阀杆的直线度、阀盖和阀杆螺母的加工位置公差以及装配误差。误差的累积最终会导致阀杆相对于填料产生角度偏移。填料杆在往复运动中的侧压力不断变化，在侧压力较小的地方容易造成泄漏。此外，在阀杆进行一定次数的往复运动后，填料的连续挤压会使填料内孔的有效间隙变大，从而导致更容易泄漏。阀杆、填料压盖表面光洁度：阀杆和填料压盖表面越光滑，填料密封效果越好。填充有石墨的金属表面的微小不平整更容易实现密封。从满足密封和阀门制造要求的经济分析来看，阀杆的表面光洁度通常为 Ra0.4 - 0.6 微米，填料压盖的表面光洁度通常设定为 Ra1.6 - 3.2 微米。密封圈、阀杆间隙、填料密封圈以及密封圈间隙阀门的设计和制造应确保密封圈与阀杆之间的间隙大于填料密封圈与密封圈之间的间隙。这样做的目的是确保阀杆在移动过程中不会咬住密封圈。尽管密封圈与阀杆之间的间隙较小，填料密封效果更好，但密封圈与阀杆之间的间隙也不应过小。由于阀门的制造误差，间隙过小可能会导致阀杆咬住。由于存在填料端环，密封圈与阀杆之间的适当间隙不会导致填料超出标准范围泄漏。 注：原文中“packing gland”和“gland clearance”翻译为“填料密封圈”和“密封圈间隙”，较为准确地传达了原文的专业术语含义。其他翻译依据上下文和习惯进行调整。该阀门在使用过程中的环境影响是评估其性能的一个重要指标。其中，该阀门的逸散排放指数是评估其环保性能的一个重要参数。阀门的 FE（环境友好度）要求已成为阀门设计与制造的基本要求。2015 年，广泛应用于阀门行业的 API600 标准首次将 API624 内容纳入阀门的 FE 测试标准文本中。同时，中国国家标准（GB）也明确要求对加氢装置的阀门进行 FE 测试，依据的是 ISO15848 标准。ISO15848、VDI2440、API624、MESC SPE77/312 等均为在阀门领域广泛应用的 FE 标准。这些标准以氦气或甲烷气作为泄漏检测介质，并通过质子光谱法进行检测。其灵敏度通常为 10-12 帕·立方米·秒-1 。逃逸排放并非一个新话题。尽管社会对空气质量及环境问题的关注度持续升温，但近年来，石化行业在逃逸排放控制、泄漏检测及修复技术的应用方面才刚刚起步。毫无疑问，对逃逸排放测试与评估的要求推动了工业发展的不断进步。就阀门行业而言，加工精度和密封质量持续提升。因此，逃逸排放阀门将逐渐成为高端阀门市场的主流产品。…

Recently, RAYS had sets of DN150/PN100 and DN300/PN150 carbon steel pneumatic hydraulic actuated Ball Valves which have been completed for production. They successfully passed the inspection and will be delivered to an international customer for their use in their natural gas pipeline.The pneumatic hydraulic ball valve is widely used in long distance natural gas pipelines and Oil & Gas field ring trunk pipe networks. They have the advantages of: stable transmission, easy control, and no need of power supply. More pros is that: it uses high pressure natural gas or hand pump as the power source, no machinery or electric equipment has a lower accident rate, it is safe & reliable, and it is economical. Under normal working conditions, the tank is filled with half a tank of hydraulic oil and the gas source tank & contrast tank are filled with natural gas, and the delay tank is empty tank. When the ball valve is in action, the oil is pushed by the itself, and the actuating mechanism is used to realize the opening and closing. The actuator is also divided into rotary vane type and fork-type. The rotary vane actuator is equipped with a rotor, which is immersed in hydraulic oil. The oil from the gas-liquid tank pushes the rotor to rotate, and the rotor drives the ball valve associated with it to rotate. While realizing the switch of the ball valve, the fork actuator uses the high pressure natural gas in the pipeline. The reciprocating piston is driven by hydraulic oil, and the rotary motion of the valve is transformed into the rotary motion of the valve by means of the fork, which drives the ball valve associated with it to rotate, and realizes the switch operation of the ball valve. A pneumatic switch handle is arranged in the operating box. The automatic control system compares the instantaneous pressure of the trunk line with the pressure in the contrast tank, determines the switch of the valve, and realizes the automatic control. Delay tank can delay valve action time and avoid instantaneous misoperation.A pressure upper and lower limit and a pressure drop rate are set to meet the operational requirements. The ball valve automatically closes when the pipe pressure is above or below the upper and lower limits. In the event of an explosion or rupture of the pipe, the valve will also automatically close when the detected pressure drop exceeds the set pressure drop rate.Manual, automatic, pneumatic and remote control modes are integrated into one. The operating mode can be selected according to the actual operating conditions to improve the safety and reliability of the valve. Manual mode, only need to replace different gears, press the handle of the hand pump to realize the switch operation; pneumatically, press the operation handle in the direction of “left open and right close” to complete the switch operation. If the notebook computer is used to set the parameters and Automatic control of the valve is achieved by starting the automatic function. If the valve is equipped with a remote control (RTu), you can pass the signal remotely.[RAYS Pneumatic Hydraulic Actuated Ball Valve]hnical featuresBolted or fully welded body, side or top entry, trunnion mounted ball or floating ball, fire safe design and anti-static design, anti-blow out stem, emergency sealing, soft or metal seated, DBB/DIB-1/DIB-2 designSize2” – 64”，DN50 – DN1600Pressure Rating150 lb – 2500 lb，PN10 – PN420MFG StandardAPI 6D, ISO 14313, ASME B16.34,ISO 17292, GB/T19672, GB/T12237MaterialA105, LF2, F316(L), F304(L), F11, F22, F51, WCB, WCC, WC6, WC9, CF8, CF3, CF8M, CF3M, LCB, LCCTemperature-196 ~ 120℃, -46 ~ 220℃, -29 ~ 550℃For more details, please visit https://www.raysvalve.com/, or email to info@raysvalve.com…

Rising Stem Ball Valve (RSBV) is a new type of ball valve, which is mainly used to cut off, distribute, and change the flow direction of medium in the pipeline. RAYS Rising Stem Ball Valve with all-metal structure and fire proof design, can be applied to the temperature range from -196℃ to 600℃. Compared with the conventional ball valve, the RSBV’s ball & seat movement has no friction, small opening & closing torque, and better sealing performance. It can be adapted to general working medium such as: water, solvent, acids, and natural gas. However, it is also suitable for working conditions such as: oxygen, hydrogen peroxide, methane, ethylene, etc.Rising Stem Ball Valve utilizes the cooperation of the inclined surface of the bottom surface of the valve stem and the spiral groove to realize the tilting and rotation of the ball. When the valve is opened, the ball is tilted away from the valve seat. Then, the fluid in the pipeline passes through the valve along the spherical surface evenly, which reduces the local erosion of the valve seat by the high-speed fluid. Finally, the ball rotates to full open position. When the valve is closed, the ball relies on the mechanical wedge of the stem bevel to be used on the seat to produce the required sealing pressure to ensure reliable sealing performance. The sealing specific pressure is adjusted according to the changes of fluid erosion wear, corrosion degree & working pressure, which prolongs the service life of the valve.Compared to regular ball valves, RAYS Rising Stem Ball Valves have the following design features:No WearThe ball of the rising stem ball valve rotates away from the valve seat, which eliminates the friction with the valve seat and solves the wear problem of the traditional ball valve, gate valve, and plug valve seats.Single-seat DesignThe static single seat of the RSBV can guarantee the bidirectional zero leakage and avoid the problem of pressure rising in the cavity of the double seats.Anti-abrasion Hard Sealing BallThe sealing surface of the ball is surfaced with a layer of cemented carbide and polished to meet the sealing performance in very harsh medium.Dual Stem GuidesValve Stem guide groove slides along the rigid guide pin then controls the valve stem’s lift and rotate smoothly.Mechanical Wedge ForceThe cam bevel on the lower end of the stem provides a mechanical wedge force to keep the ball and seat tight.Inner Leak DetectionThe valve body is designed with a special device to detect the internal leakage of the valve.Low Operating TorqueRSBV sealing surface has no friction, so the opening and closing torque is small.Self-cleaningWhen the ball is deviated from the seat, the medium can flow 360 degrees along the sealing surface and rinse the impurities in the medium.Injectable SealantCan be maintained during operation, and the sealing grease is injected through the greaser to completely control the volatilization and prevent leakage.Long LifeRSBV could replace many troublesome valves such as ball valves, gate valves, globe valves, and plug valves. The unique characteristics of the RSBV are that it can effectively reduce the device failure rate, greatly reduce the user’s use, and maintenance costs. The RSBV uses a simple and effective movement to coordinately control the separation, rotation & compression of the sealing contact surface, so that the valve switching process has no friction, zero leakage, and low torque operation. For conditions with low leakage and frequent opening/closing requirements, the RSBV is undoubtedly the most ideal application.For more information about the rising stem ball valve, please visit https://www.raysvalve.com/ , or email to info@raysvalve.com , or call 0577-66999000…

RAYS Cryogenic Ball Valves are mainly used in liquefied natural gas, liquefied petroleum gas installations, air separation devices, and other low-temperature industries. The most advanced Lip-Seal sealing technology is adopted by RAYS Cryogenic Ball Valve, which can maintain excellent sealing performance in application.For the ball valves which are commonly used in low temperatures, RAYS fully considers the requirements of various parts of the valve under low temperature conditions. Due to the temperature stress of the valve body under low temperature conditions, the additional stress of expansion and contraction of the connecting pipe is very high. Also, the rigidity of the casing is important to keep the valve sealing pair from deforming. In order to prevent the brittle failure of stress concentration at low temperature, RAYS Cryogenic Ball Valve avoids sharp angles or grooves on the shell during the production process.In low temperature environments, the valve is designed with an extended stem to prevent damage caused by the temperature of packing box to freezing point. The austenitic stainless steel will undergo partial transformation at low temperature, which will result in phase transformation stress and deformation, and the temperature change will also produce temperature change stress and deformation. In the manufacturing process, RAYS thoroughly pays attention to the low-temperature cryogenic treatment of all parts of the valve to reduce the effect of temperature on the sealing performance for the Cryogenic Ball Valve.Cryogenic Ball Valve medium is usually flammable and explosive, and when the valve seat is a non-metal polymer, there is danger of static electricity accumulation. That potential static can lead to a spark which can cause combustions and explosions. Therefore, within the design and manufacturing, RAYS sets a conduction device between the valve stem + the valve body and valve stem + disc to extract static electricity.The low-temperature liquefied gas medium will vaporize and expand when the temperature rises. For example, if there is a closed space in the valve, the internal pressure of the valve will increase several times and cause leakage when the liquid is vaporized. In severe cases, the valve body cracks and causes an accident. The ball valve forms a confined space when fully closed and fully open, so RAYS adopts the valve cavity automatic pressure relief design. The RAYS Cryogenic Ball Valve usually adopts the following two internal venting methods: 1) Through the pressure relief hole, the valve middle cavity is connected with the pipeline inlet end, so that the middle cavity pressure is always balanced with the pipeline inlet end; 2) While adopting DBB structure, once the chamber pressure reaches the set safety relief pressure, the cavity medium is discharged into the inlet line.RAYS Cryogenic Ball Valve product range：SizeNPS2’’-24’’Pressure RatingClass 150-2500Temperature-196 ~ 150℃Body MaterialAustenitic Stainless SteelTrim MaterialStainless Steel, Lip Seal Sealing, Cryogenic non-metallic Seal Ring / SeatRAYS follows the spirit of craftsmanship and pursues to the highest quality. RAYS strictly controls the factory during production of all valves, and strives to supply higher quality product and service for the Cryogenic Ball Valve to all customers and end users. For more details, please click on https://old.raysvalve.com/…