We know that the amount of work that most valves require to repair is minimal, which means that most valves do not have to be repaired often. Sometimes, even a simple problem such as the leakage of a valve stem is often due to negligence. What is more, some reckless operators do not close the valve in accordance with the requirements of the technical specifications, resulting in severe damage to the valve stem or the closure. This happens from time to time.
The threaded joints of the stem nut and stem should be lubricated with oil regularly, which not only can reduce the friction between them, but also can prolong their service life. This is also a very important protection measure. If the worn stem nut is still in use, then there may be a breakage so that the entire axial force of the stem is not supported and the valve will lose its effect.
A simple leak at the beginning of the gasket finally reached the danger of steam leakage. To avoid this danger, when the leakage begins, the bonnet bolts should be properly tightened; if the valve seat sealing surface is not properly selected due to material selection, a small amount of leakage is started, which may later be extended to leaking grooves, and the opening height is not enough. This speeds up fluid erosion and results in complete damage to the valve seat.
The stem bending may be caused by the operator turning the handwheel too far after closing the valve.
There are many reasons for valve damage. In fact, if operators are slightly trained, similar situations may be avoided.
The use, maintenance and repair of several common valves are now described one by one.
Shutoff valve is a commonly used shut-off valve, mainly used to connect or cut off the medium in the pipeline. In the piping system, the time for not operating the cut-off valve is very small. Therefore, regular maintenance is required.
A small amount of packing leakage can be solved by simply tightening the packing gland nut. However, when the packing is damaged, the packing must be replaced. When replacing the packing, the valve must be fully opened to allow the upper seal to function (which is generally possible under pressure). Replace the packing box with a suitable packing and tighten the packing gland nut. Afterwards, check periodically to prevent loosening of the gland nut.
When replacing the valve parts, lift the stem, disassemble the valve cover, install a new disc on the new holder, turn the stem until the disc is disengaged from the holder, and use the new disc. And the holder is replaced and installed in the valve, and the operation of replacing the valve flap is convenient.
To polish the flap (abratable newer valve), use a small amount of abrasive on the flap and then grind it. The grinding method is to place a pin on the hole of the valve nut slot and the head of the valve rod, place the assembly on the valve body, unscrew the connection sleeve, and then perform grinding alternately. Use the valve stem as a grinding tool, add the abrasive, and grind it. The grinding should not be excessive. When grinding is complete, remove the abrasive and lubricate the threads.
The function of the check valve is to allow only one-way passage of the fluid to prevent back flow of the medium.
The most common urea device is a lift check valve. The valve flap moves up and down along the centerline of the channel. The action is reliable, but the fluid resistance is large. It is suitable for small and medium caliber occasions. Lift-type check valves can be divided into straight-through and vertical or angular. The straight-through lift check valve can only be installed in the horizontal pipeline, and the vertical lift check valve should generally be installed in the vertical pipeline, and the medium flows from bottom to top, and the angle lift check valve can only be installed vertically. The pipeline.
Special care must be taken when adjusting larger spring-loaded safety valves, because neither the user, the manufacturer, nor the repair shop has sufficient capacity to accurately verify the discharge pressure. Do not make any adjustments to the spring-loaded safety valve unless it is accurately adjusted at the manufacturer or on the actual device.
Commcrcial Vchicle Nylon PA Tube
Changchun FAW Sihuan Automobile Pipeline Co., Ltd
The original intention drives us to persist in innovation and achieve transcendence;
Our mission is to promote our continuous progress and excellence.
We will make our products to the extreme, and the Viewport Monument is the life of the enterprise,
Become a reliable one-stop professional supplier of automotive pipeline products.
Rooted in the northeast, it radiates across the country.Sihuan Pipeline Company, integrating R&D, design, production, experiment and testing, has been specialized in producing nylon gas transmission pipeline, fuel pipeline and high-pressure pipeline products for 20 years.At present, the enterprise has nearly 40000 square meters of modern production workshops and business office buildings, more than 200 senior employees, and an annual output of 56 million automobile
pipeline products.Its subsidiaries are located in Chengdu, Qingdao, Ma'anshan, Jinan, Foshan and other cities. Yuncheng Branch is under preparation to meet the needs of customers in different regions.
Innovative fusion, leading technology
<R&D>
Sihuan Pipeline Co., Ltd. takes technological innovation as its eternal pursuit, and has accumulated profound technical information through 20 years of scientific research, providing the most advanced technical support for each product project.The company has been recognized by the municipal technology center and participated in the revision of several national standards and industrial standards.The scientific research team has reached cooperation with Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun University of Technology and other scientific research institutes, jointly developed a number of provincial science and technology department projects, and achieved a number of technical achievements.The testing laboratory has passed the ISO17025 laboratory management system certification. It has more than 40 sets of tube performance testing equipment and raw material testing instruments, and the testing means are
internationally leading.
Lean production, better quality than gold
<Production>
Sihuan Pipeline Company, based on the industry trend, formulates equipment procurement plans every year and continues to introduce world-class production equipment. Now, it has several automatic extrusion production lines in Merafil, Switzerland, as well as international top equipment such as Clarke bellows molding machine in France, Opel shrink pipe machine in Italy, which are stable, efficient, highly accurate, meet the diversified needs of the main engine factory, and achieve the brand charm of Sihuan.
Scientific management, safeguard quality.The production department implements a quality control system higher than the national standard, adopts 6S management on the site, regularly carries out personnel training, and constantly improves the process procedures.The quality inspection department must inspect every product and every process, resolutely put an end to the delivery of substandard products, and strive to promote product quality to the highest standards in the industry.
Four ring quality, famous throughout the country
<Products>
The products produced by Sihuan Pipeline Company are related to brake systems (including vacuum brake pipes, air brake pipes, spiral pipes, rear axle brake pipes);Fuel system (cover to atmospheric ash filter pipe, fuel pipe, crankcase vent pipe, vacuum pipe);New energy thermal management system and industrial energy storage water inlet and return pipeline assembly integrate safety functions such as check valve, flow regulating valve and exhaust valve, which directly affect vehicle performance and are prerequisites for safe driving;SCR system (including electric heating urea pipe, cooling water pipe and gas pipeline);High pressure pipeline products are used in clutch power assist system and hydraulic lifting pipeline. Excellent performance, stable physical performance, excellent chemical resistance, good processing performance and long service life.All products have passed the CQC certification, and all parameters tested in the laboratory are far higher than the national standards and industry standards.
After 20 years of hard work, Sihuan Pipeline Company has won recognition from all walks of life. It has successively won honorary titles such as "Jilin Province Small Giant Enterprise in Science and Technology", "High tech Enterprise Certificate", Changchun "Specialized, Special and New" SMEs. Its products are
now available to FAW Jiefang, FAW Pentium, Heavy Duty Truck Group, CIMC, Rolls Royce, Yapu, Sany Heavy Industry, GeelyContinental Group and other well-known enterprises are A-level suppliers of FAW Jiefang and other OEMs, and excellent suppliers of Anhui Valin.
In the future, Sihuan Pipeline Co., Ltd. will cater to the national carbon peak strategy, research and develop low emission pipeline manufacturing technology in a forward-looking manner, provide customers with high-quality products and services with innovation and quality, and create a better future for the automotive industry!
Nylon Pa Tube,PA11 Hose,Nylon Fuel tube ,Braided Fuel Line
JiLin TAIYU Technology Manufacturing Co., LTD , https://www.fpcpfuelpipe.com