How to extend the service life of stainless steel ball valves?

Stainless steel ball valves are widely used in China and are indispensable in chemical, water conservancy, electric power, steel, petroleum refining and other industries. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. It only needs to rotate 90 ° and a small torque to close tightly. So how to extend the service life of stainless steel ball valves?

How to extend the life of stainless steel ball valves

1. With regard to disassembly, you must first check the upstream and downstream pipes of the ball valve to make sure that the pressure has been removed before carrying out the disassembly operation; when reassembling, remember to be careful to prevent damage to the sealing surfaces of the parts, especially non-metal parts. Use special tools to operate, the flange bolts should be tightened symmetrically and evenly.

2. Regarding cleaning, the cleaning agent must be compatible with rubber parts, plastic parts, metal parts and working medium in the ball valve. For example, when the working medium is gas, you can use gasoline to clean the metal parts. After cleaning each part, wait for the cleaning agent to evaporate or wipe off the cleaning agent before assembly. But it cannot be left for a long time, otherwise it will rust and be polluted by dust.

3. Use grease. Grease should also be compatible with working materials such as ball valve metal materials and rubber parts. When the working medium is gas, special 221 grease can be used. Apply a thin layer of grease to the surface of the seal installation groove, the rubber seal, and the sealing surface of the valve stem.

Advantages of stainless steel ball valve

1. The stainless steel ball valve will not get stuck during operation, even in the lubricant-free type, it can be reliably used in corrosive media and low boiling point liquids.

2. It can also achieve complete sealing in a large pressure and temperature range.

3. It can realize fast opening and closing, compact structure and light weight. It can be considered as the most reasonable valve structure for low temperature medium system.

4. Especially the welded valve body structure can well withstand the stress from the pipeline.

5. The fully welded ball valve can be directly buried in the ground, so that the internal parts of the valve will not be eroded, and the maximum service life can reach 30 years.

6. The material of the valve seat sealing ring of the ball valve is polytetrafluoroethylene, which has the comprehensive characteristics of small friction coefficient, stable performance, not easy aging, wide temperature range and excellent sealing performance.

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