Stainless steel globe valves can reduce wear and ensure long-term stable operation through various designs, materials, and maintenance methods.
Stainless steel globe valves can reduce wear by optimizing the flow channel design and sealing surface shape. The Y-shaped flow channel design can reduce the direct flushing of the medium on the sealing surface, avoid the retention of impurities, and increase the service life by 2-3 times compared to straight through globe valves in working conditions with solid particle media. The use of spherical or conical sealing surface design can reduce the contact area and friction, while there is no relative sliding between the valve disc and the valve body sealing surface, significantly reducing wear and abrasion. The application of wear-resistant coatings (such as tungsten carbide) can further improve wear resistance. Installing such coatings on the inner cavity of the valve body and the surface of the valve disc can effectively reduce the erosion of the medium on the valve internals.
Material selection is crucial for wear resistance. 316L stainless steel has stronger wear resistance in harsh environments due to the addition of molybdenum element. The valve disc and seat are welded with hard alloy (such as Stellite), with a hardness of HRC ≥ 45, and the wear resistance is increased by more than three times. Surface hardening treatments such as nitriding, carburizing, or laser cladding can form a hard protective layer on the surface of the valve, reducing wear and scratches. Sealing materials such as polytetrafluoroethylene (PTFE) can withstand temperatures up to 200 ℃, while rubber sealing rings are suitable for low-temperature and low-pressure scenarios. Metal hard seals can withstand high temperatures and pressures (up to 550 ℃).
Proper operation and maintenance can significantly extend the lifespan of valves. Regularly lubricate the moving parts of the valve and use lubricants suitable for stainless steel materials to reduce friction and wear. Avoid using excessive force to close the valve to prevent unnecessary mechanical damage. Maintain the cleanliness of the medium, regularly remove debris and dirt around the valve, and reduce the wear and tear of the valve caused by impurities. Regularly check the sealing performance of valves, ensure their normal operation through pressure testing, and replace seals promptly if leaks are found. When the valve is not used for a long time, rust prevention treatment should be carried out by spraying rust inhibitor on the surface.