Corrosion Protection Requirements for Ferrule Needle Valves


Release time:

2024-01-18

The card sleeve needle valve is a valve product used for precise flow control, and the valve disc is usually an integrated structure with the valve stem. This article mainly introduces the anti-corrosion aspects that need to be taken into account for the sleeve needle valve.

The card sleeve needle valve is a valve product used for precise flow control, and the valve disc is usually an integrated structure with the valve stem. This article mainly introduces the anti-corrosion aspects that need to be taken into account for the sleeve needle valve.
1. The valve body of the card sleeve needle valve needs to be corrosion-resistant, so some corrosion-resistant materials such as stainless steel, carbon steel, etc. need to be used. However, it is not an easy task to choose the appropriate one, as the issue of corrosion is more complex. The difficulty in selecting valve body materials lies not only in the issue of corrosion, but also in considering the performance of high pressure and temperature resistance, as well as production costs, and so on.
2. Under low pressure and temperature, using non-metallic materials as the main body of valves can often effectively prevent corrosion.
3. Taking lining measures, such as lining with lead, lining with aluminum, lining with engineering plastics, rubber, and various synthetic rubbers, if the medium conditions permit, this is actually a cost-effective method.
4. The outer surface of the card sleeve needle valve is also subject to atmospheric corrosion, and generally steel materials are painted for protection.