Anticorrosive method of needle valve

First the body of the anti-corrosion, the main choice of materials for stainless steel, carbon steel. Corrosion is very rich, but can choose properly, or not easy, because the corrosion problem is very complex. Select Instrument needle valve material difficulty, lies not only consider the corrosion problem, and must consider the ability to withstand temperature, whether it is economically reasonable, is it easy to buy and other factors.
Second is to take the lining measures, such as lining of lead, aluminum lining, plastic lining, lining of natural rubber and synthetic rubber. If the medium conditions permit, this is an economical method.
Again, the pressure, temperature is not high case, the main Needle valve to do with non-metallic materials, can often be very effective to control corrosion.
In addition, the outer surface of needle valve body is also subject to corrosion, general steel materials to paint protection.