High temperature and high pressure ball valve is a kind of high temperature and high pressure resistant valve, wear-resistant ball valve. The high temperature can withstand up to 550°. The valve seat on both sides of the valve adopts the elastic force of the spring to make the valve seat on both sides tightly hug the center of the ball to play a sealing role. The sealing material is hard alloy, and the spherical surface is spray-welded. Such a hardness coefficient is relatively high. The valve seat and the valve body are sealed with graphite, so the temperature can withstand up to 550°. The advantages of this design are: 1. Good sealing performance, 2. High temperature resistance, 3. Wear resistance, 4. Easy opening and closing, 5. Long service life. The sealing of high temperature and high pressure ball valves mainly adopts metal sealing pair, which has the advantages of wide applicable temperature range, and the thermal expansion coefficients of various metals are not much different. As long as they are selected properly, they can be basically consistent, which is beneficial to coordinate temperature difference deformation. The disadvantage is that the material hardness is high, and the specific pressure necessary to achieve the seal is high.Even if the pre-tightening force is used to achieve the seal, due to the large seal specific pressure, the wear between the valve seat and the ball is also large, and the friction coefficient of the metal sealing surface is relatively high. Large, resulting in a larger opening and closing torque of the ball valve. Therefore, most of the hard-sealed ball valves adopt elastic sealing pairs, which have reliable performance, strong elastic compensation ability, and a wide applicable temperature range. They are suitable for both floating ball valves and fixed ball valves.
The main application scope of high temperature and high pressure ball valve: high temperature and high pressure ball valve is suitable for various pipelines of Class150～1500, PN1.6～16.0MPa, working temperature -29～425℃ (carbon steel) or -40～550℃ (stainless steel), It is used to cut off or connect the medium in the pipeline. Different materials are used. It can be applied to various media such as water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, ammonia brine, and neutralized water.
The characteristics of the high temperature and high pressure ball valve: the surface of the high temperature and high pressure ball valve adopts spraying technology. Through the treatment of various working conditions, the high hardness can reach HRC72 degrees. The high hardness of the sealing surface of the valve seat can reach HRC72. The ball and the valve seat are matched and ground, and all the sealing areas of the entire sealing surface of the ball valve are precisely ground. It is suitable for high-temperature and high-pressure water, steam, petroleum, coal, fiber, thick and corrosive media, and media with particles.
The high temperature and high pressure ball valve has been scoured by materials for a long time, causing friction, causing severe impact and wear, which cannot meet the normal production, and at the same time, the equipment life is shortened. At present, wear-resistant materials, such as ceramic materials and polymer composite materials, are mostly used for the wear of ball valves, and the Micahua technology system is more widely used. The polymer material has superior adhesion performance and wear resistance, which solves the disadvantages of frequent metal wear and ensures the normal production of enterprise equipment. In addition, the unique ceramic material and special surface strengthening agent in the pneumatic high temperature and high pressure ball valve material make it better than any steel or even ceramic tile in the harsh dry grinding environment. The product is incompatible with coal. Performance is an ideal material to prevent coal deposits.