How can I improve the service life of my valves?

The service life of the valve is mainly determined by the quality, but the daily reasonable use and maintenance is also essential.

1. In the valve design or use experience, the lifting valve packing is mostly asbestos packing or graphite packing or PTFE V-type packing, but these packings are limited by the number of valve opening and closing, that is, with the increase of the number of valve opening and closing, the packing will wear out, and the gap will gradually increase, and the valve will leak from the packing to a certain number of times (according to statistics, it will not exceed 2000 times). After a leak, it is necessary to re-compress the packing gland from the source. This solution is suitable for occasions where the number of valve openings and closing is not large.

2. If the opening and closing times of the valve are frequent, (such as 10-300,000 times a year), this will undoubtedly increase the use and maintenance cost of the valve. Is there a design that can seal the valve after 1 million to 2 million openings and closing? The answer is yes.

One way is to add a washer under the packing and a spring under the washer (the preload of the spring needs to be calculated), and when the packing wears out, the packing will be re-pressed to make it seal due to the action of the spring. At present, this method can only achieve 50-1 million times of opening and closing without leakage through the use of inspection, and the user needs to re-compress the packing gland during the annual overhaul, which can only reduce the usual maintenance.

Another way is to choose hydraulic and pneumatic sealing technology, change the original valve design idea, use cylinder seal slip ring at the packing place, and increase the type 0 sealing ring (the friction force and sealing specific pressure need to be calculated to determine the number of slip rings and type 0 sealing rings). By using this method, it can reach 2 million times of opening and closing without leakage, but the type 0 sealing ring needs to be aged, and the service time is only 5 years, and the cost is high.

The life of the valve is related to three factors, one is the quality of the valve itself, and the other is the working conditions of the valve; The third is whether the installation and maintenance of the valve are correct. The quality of the valve itself is related to the raw materials, structure and treatment process of the valve, the selection of engineering ceramic materials can effectively improve the wear resistance and corrosion resistance of the valve, the treatment mostly adopts the method of heat treatment and surface hardening, and I personally think that the former can improve the performance and service life; We have no choice for the working conditions of the valve, we can only say that we must choose the right working conditions when selecting the valve; Proper valve installation, proper operation and maintenance can also improve the life of the valve.

The following are some well-known brands recognized in China in the valve industry, which are widely recognized and enjoy a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, which is currently for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. In general, the selection of valve manufacturers needs to be comprehensively considered according to actual needs, and choose manufacturers with a high technical level and good reputation for cooperation.

We need to note that the above manufacturers are only estimates and references, the specific situation may be due to changes in the market, the size of the competitive landscape, product quality stability and a series of factors and changes or floating at any time, valves as an indispensable key device in industrial production and civil facilities, the quality and reputation of its brand directly affect the satisfaction and trust of users.

Valves are control components in fluid transportation systems, which have the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves for fluid control systems range from the simplest shut-off valves to the most complex valves used in automated control systems.

If it is a soft seal, choose a better valve gasket, the kind of gasket with high elasticity and low coefficient of friction. If it is a hard seal, choose the valve of Stellite alloy, which has high hardness and wear resistance.

1. The newly purchased valve has sealing tin foil at the inlet and outlet ends, mainly to prevent impurities from running into the valve during storage and handling, resulting in a series of common problems such as valve core wear and inability to shut down in the later use, so please do not tear off the sealing paper of the import and export when the valve is not in use.

2. When the valve is installed, try not to have impurities running in, if you are not sure whether there are impurities inside, and the inside of the pipeline is not clean, then please be sure to open the valve before the second use after installation, and then purge or flush the entire pipeline, so as to reduce the further damage of impurities in the pipeline to the valve.

The way to extend the life of the pneumatic ball valve is to keep the air source on the site stable, the stable air source can make your valve switching speed and the life of the valve sealing ring directly affected, each actuator is best to install a double piece, this double part can not only provide stable air pressure, but also regularly refuel the cylinder, but also discharge the moisture in the air, so that the life of the cylinder is greatly improved. The life of the valve is determined by the medium used in the field.

The ceramic regulating ball valve adopts a three-piece structure, which has the characteristics of double seat and double seal. When choosing a ceramic regulating ball valve, try to choose a valve with inclined transition design, which can reduce the impact of the fluid, thereby prolonging the service life.