Blog

21

2021

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05

The check valve ensures the directional flow of the medium in the pipeline without backflow.

The opening and closing of the check valve is to rely on the medium flow force to open and close. Check valve is an automatic valve products, check valve only allows the medium to flow in one direction of the pipeline to use, to prevent the phenomenon of medium backflow. It has a wide range of applications and can be used in large and small caliber, various media, and high-voltage power station systems.

18

2021

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05

Installation of valve

Installation of valve Description of installation contents of valve: 1. Before installation, check the appearance of the valve without cracks, sand holes and mechanical damage. 2. Check and confirm that the nameplate is in good condition and meets the use requirements. 3. Remove the residue in the valve. 4. Rotate the valve stem to see if it is flexible and free, and install it after confirmation to avoid invalid work. After the inspection is completed, clean the pipeline connected to the valve, and use compressed air to blow away the welding slag and other debris in the pipeline. 5, installation, should be strictly in accordance with the installation instructions provided by the manufacturer. When installing the threaded valve, the sealing packing should be wound on the pipe thread to avoid accumulation in the valve and affect the circulation of the medium. When installing the flange valve, pay attention to the symmetrical and uniform tightening according to the specified torque to avoid uneven tightening torque and damage to the valve. The valve has a direction mark on the valve body, and should be installed correctly according to the direction of the valve flow in and out. For example, check valves, globe valves, throttle valves, pressure reducing valves, if installed upside down, will lose the function of the valve in the pipeline system, and even cause danger. Installation of valve insulation device. Condensation and agglomeration of the medium in the ambient temperature shall be combined with the pipeline for heat preservation and heat tracing to prevent the valve from freezing. (6) For pipelines conveying flammable and explosive gases, nitrogen must be used to purge and replace the pipelines before the pipelines are put into operation, so as to prevent the transmission medium and the oxygen in the pipelines from forming the explosion limit and avoid the occurrence of explosion.

18

2021

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05

Valve design and change analysis

阀门设计的变化和分析    近几年，伴随着随着工业环境的持续不断发展，工业上的规模持续的提升，在竞争如此计划的市场环境里，企业为了能够得到一个比较好的发展，有效的去对先进的机械设备进行使用使其能够对企业当前的工作效率给予提升是当前现代化市场经济保持快速发展的主要要求。在当前机械设备里，阀门所进行的设计是当前整体机械系统保持安全稳定运行的关键内容。有效的对机械设备阀门给予合理的设计，可以说这是对阀门自身价值给予实现的根本内容。 　　1 阀门设计概述 　　阀门可以说是当前工业以及人类进行生活过程中不能够缺少的一种属于通用类型的机械产品，阀门其在当前的流体系统里，主要的目的就是去对流体自身的方向和压力以及流量的装置进行控制，同时其还能够对于配管以及设备内的介质去进行设置使其（液体、气體、粉末）流动或者是暂停并且可以对其自身流量给予控制的主要装置。阀门可以说是管路流体输送系统里不能够缺少的一种控制部件，它主要的目的就是用于去对通路断面以及介质的流动方向进行改善，其本身具备导流和截止，以及节流和止回，还有分流或者是溢流卸压等多种功能。用于流体控制的阀门，从最简单的截止阀到非常复杂的自控系统过程中其主要使用的多种阀门，其自身的品种还有规格可以说是非常多的，阀门其公称通径在非常微小的仪表阀大到通径达到10m的工业管的路用阀。阀门上所进行的控制能够使用多种传动的方式，例如手动和电动，还有就是液动以及气动等；同时其还能够在压力和温度还有其它形式传感信号产生的作用之下，去按照预定的动作要求，或者使其自身不依赖于传感信号而完成大姨的开启或者是关闭。阀门依赖于驱动或者是自动机令使启闭件作升降以及完成滑移还有旋摆以及相关的回转运动，从而使其能够对其自身的流道面积的大小去对其自身所需要进行的控制功能给予实现。 　　2 阀门设计相关标准和变化分析 　　近几年伴随着我们国家经济的飞速发展，国际之间所进行的合作水平也在持续的提升，发展工业可以说是国家强大的一种非常主要的保障，工业化水平其自身的持续提升也使得我们国家的国家经济获得了快速并且稳定同时十分持续的发展，从而使得人们自身的生活水平得到了快速并且十分稳定国的提升。同时还能够使得工业作业水平不能够与机械作业相背离，阀门在当前机械作业系统里也起到了不可忽视的主要作用，阀门当前所进行的设计直接对于机械系统其自身的安全性能产生影响，为了能够令当前的工业获得更加有效并快速的发展，世界山国的很多都开始积极的去对阀门相关的设计以及研究的工作，从而其能够更好的促进我们国家国际化经济的持续与稳定的发展。阀门当前在设计上的规模也开始朝着国际化的方向发展，世界上的很多国家国都对不同类型的阀门进行研究。而在阀门市场上API 6D以及ASME B16.34可以说是进行阀门设计过程中不能够忽视的两个非常主要的标准。

11

2021

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05

Working principle of gas drain

Working principle of gas drain In the process of gas transportation and combustion, the condensed water in the gas pipeline will affect the normal operation of the gas transportation equipment and the gas combustion equipment. If the condensed water cannot be discharged out of the gas transportation pipeline in time, it will cause the gas transportation equipment to be damaged and the gas combustion equipment to work Abnormal, and even endanger personal safety. The function of the gas drainer is to collect and drain the condensed water in the gas pipeline. Ordinary gas drainers have the following problems in use: when the production conditions make the gas pressure rise a lot instantly, the gas drainers are easy to be broken down, resulting in a large amount of gas leakage and serious accidents; When the gas pressure fluctuates frequently, the gas drainers cannot automatically replenish water. If people work hard, it will lead to gas leakage, easy to cause fire or gas poisoning; Especially in the low temperature environment in the north, the gas drain is prone to freezing when the gas drain is working, causing the equipment to fail to work normally, and it is necessary to take electric heat tracing and insulation measures for the gas drain.

26

2021

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04

The role of gas drainer

The function of the gas drainer is to collect and drain the condensed water in the gas pipeline. Ordinary gas drainers have the following problems in use: when the production conditions make the gas pressure rise a lot in an instant, the gas drainers are easy to be broken down, resulting in a large amount of gas leakage, causing serious accidents; When the gas pressure fluctuates frequently, the gas drainers cannot automatically replenish water. If people work hard, it will lead to gas leakage, which is easy to cause fire or gas poisoning; anti-breakdown gas drain can be a good prevention and control. Especially in the low temperature environment in the north, the gas drain is easy to freeze when it works, causing the equipment to fail to work normally. It is necessary to take electric tracing heat preservation measures for the gas drain or the water heater. According to the technical requirements under various extreme conditions in gas transportation, the above problems of ordinary gas drain are solved, and the continuous use is safe and reliable, and it is widely used in various industrial enterprises using gas as fuel, anti-breakdown gas drainers are more popular with major companies.

23

2021

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04

Analysis of Influencing Factors of Valve Sealing Structure

The sealing degree of the valve is determined by the combination of its type and nature. The sealing degree of the valve is also directly related to the material, equipment, tooling and process of the valve. If there is a quality problem in any link, it will inevitably affect the application quality of the valve. Combined with scientific design standards, the sealing structure should be designed as a cone or a sphere, but compared with the plane sealing structure, this sealing structure will have many adverse effects, the sealing surface is prone to scratches, and there are many difficulties in maintenance and processing, which is also relatively easy to increase production costs, and market sales will also have a great impact. The valve sealing surface is designed to be conical or spherical, which will be affected by adverse factors. The flat sealing design is adopted to change the sealing surface of the valve stem and valve cover from the original conical shape to the flat contact pattern. This method is relatively small, the precision of the device and equipment can be guaranteed, and the processing is relatively easy. The length of time the valve is used and the number of valve switches is proportional, and maintenance is relatively easy. welcome attention to the wuhan joint special valve science and technology limited company's official website.

23

2021

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04

Application Points of Valve Sealing Structure

The application of valve sealing structure, we should pay attention to strengthen attention from several aspects, can not let the valve work in a relatively small opening condition, the start of the valve needle is relatively slow. Therefore, when the opening is small, the throttling interval is relatively small, and it is necessary to appropriately expand the pitch of the locking mechanism, increase the opening speed and lift of the valve needle, and the working opening will be further increased, which can effectively extend the valve Use cycle. The practical application of the valve sealing structure, the medium temperature for the use of the valve cycle is relatively easy to have an impact, high medium temperature is relatively easy to shorten the service life of the valve, in the specific use of the process, it is necessary to try not to apply the valve to work under high temperature medium, the pressure relief valve to increase the cooling device, which can effectively extend the use of the valve cycle. To avoid impurities into it, this will affect the service life of the needle valve. In addition, the need for regular cleaning and filtration of high-pressure media, plus liquid need to use the filter to implement filtration, the use of more times to appropriately shorten the use of the cycle, do a good job in the cleaning of the tank, etc., only from these aspects have been fully valued, in order to protect the application quality of the valve sealing structure. Welcome to the official website of Wuhan Xiete Valve Technology Co., Ltd.

23

2021

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04

How to purchase valves

        我们知道， 阀门采购要经过诸多环节，但确保质量的关键环节主要在于采购部门提出采购技术要求，这是重要的环节。随着国内工程项目的建设，阀门制造单位也将通过不懈的努力，发展壮大，建设单位和制造单位之间仍会存在许多的问题和矛盾，亟需共同研究、努力，在解决问题和矛盾中共同前行。 　     一、采购模式 　　（1）最低价中标模式。无论是国内的建设单位还是国外的建设单位，都想以最小的代价得到最优的产品，这就造成阀门制造单位采取不惜亏本也要确保中标的做法与策略。但是，在阀门招标过程中，阀门制造单位采用这种“亏本”投标的方式，多是通过“以次充好”降低成本，进而获取利润，这样做的代价造成了企业诚信的丢失，也往往成了“一锤子买卖”。很多阀门制造单位感到非常委屈，经常抱怨“游戏规则”制定不合理性，在此种模式下，如此低廉的价格，甚至连产品成本都不够，根本不可能得到招标书中所要求的那种优质产品。对于这种说法，这种抱怨，可以理解，可以同情，但不可以完全认同。当前，国内很多石油化工装置和煤化工装置关键部位的关键阀门虽然是普通阀门，但却开始倾向于采用进口阀门，而且，这种倾向呈“上升”和“扩大”的趋势，这不能不说是国内阀门制造单位的一种悲哀，也势必会将一些阀门制造单位逼上“绝路”。其实，这又何尝不是国内企业“自相残杀”的恶果？当然，从另一个角度来讲，优胜劣汰这一亘古不变的原则也必将使另一些守得住诚信、把得住质量的阀门制造单位长盛不衰。 　　（2）“按质论价”中标模式探讨。对于阀门“按质论价”模式的采购策略，通常先预付很少一部分预付款，按照阀门的使用寿命和质量进行考核，根据考核结果逐年将尾款付清，而尾款占整个订单总价格的50%以上，这种模式适合资金实力雄厚的阀门制造单位，而对于国内绝大多数中小型阀门制造单位来说，这种模式严重影响了资金回流速率和资金链的安全性，也是其不能接受的主要原因之一。 　　（3）“框架采购”模式。“框架采购”模式或许是所有阀门制造单位最希望采用的方式，但是这种采购模式几乎不为建设单位所采用，原因很简单，工业装置所需要的绝大多数阀门不属于“高、精、尖”种类，只有某些装置的关键部位需要“高、精、尖”的阀门，并且数量有限，所以建设单位一般不会使用“框架采购”的模式进行采购。 　　二、阀门质量要求问题 　　不管采用哪种采购模式，建设单位、阀门制造单位有一个共同的愿望，那就是“利益最大化”。作为建设单位，总是希望以最小的代价获得最适合的产品，也就是性价比最高的产品。在招标过程中，所有阀门都会被提出成分要求、结构规格要求、质检要求和运输要求等，这些要求有时候是比较高的，也貌似非常严苛。 　　阀门采购时，需方应提出详细的环境及阀门的技术要求，供方按照需方要求在阀门生产的几个主要环节，认真把关，做出用户满意的阀门产品。需方按照采购技术条件对供方的阀门进行严格的质量验收控制，在采购的主要环节与供方进行及时沟通，以便获得性能可靠稳定的阀门产品，满足使用要求。        欢迎大家关注武汉协特阀门官网。

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