News - Measures for Reducing Damages on Gate Valves

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Home > News > Measures for Reducing Damages on Gate Valves

Measures for Reducing Damages on Gate Valves - 2013-06-24 09:59:36

Valves are widely used in piping and plumbing systems and other fluid flow related structures. They are used to control the amount of flow, to regulate the pressure on components and pipes, and even to change the directions of fluid flow. The valve has a quite large family with dozens of members including Soft seated butterfly valve, metal seated butterfly valve, ball valve and gate valves and etc.

For us, the most familiar application is in household water supply system where Single Eccentric Butterfly Valve and cast iron gate valve are usually adopted. Gate valves, especially the cast iron gate valves gain their popularity in our drinking water supply system because they are very easy to operate. People with little knowledge in valves can handle minor problems. Other physical and chemical properties of gate valves also meet the strict requirements.

In spite of all good features with Double Eccentric Butterfly Valve, there are defects which will result in damages to valves, affecting normal performance and reducing service life. During the usage, we should have regular inspection on gate valves to ensure proper performance. We can also take measures to reduce the influence of damages. We might sometimes feel the difficulty in opening or closing the valve. There is a good chance of lack of lubrication here. We should lubricate the stem and shaft of valve. The frequency of lubrication should be higher in winter because of the cold weather.

Cast steel gate valve and Triple Offset Butterfly Valve with fine coatings or enamels outside have stronger resistance against corrosion. But rusting is unavoidable for metal parts. The possibility of rusting is bigger for valves being exposed to the environment directly. If we find minor rust on the surface of valves, we can scrape off the rust with wire brushes. After the scraping, apply a layer of painting on the surface to delay the process of rusting. Rusting is one of the most annoying problems with valves. It can do great damages. The sooner we fix the rusting problem, the better.

The inlet or outlet positions on the valves are weak parts. They will get blocked sometimes to impede flow of fluid. There might be frosting or freezing during cold seasons. To solve this problem, we can wrap Teflon tapes or silicone strips around the thread parts. Remember to change these tapes at least once a year.

A little precaution and maintenance can help us save money on repairing or replacement during usage.

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