In the form of ball valves, it can be divided into floating ball valve and fixed ball valve, hard seal ball valve.
In the high temperature, high pressure, high flow rate of severe erosion corrosion, containing high strength particulate media and other conditions, we often use hard seal ball valve, the existence valve life is low, leakage, short warranty period. Adamant valves has concentrated on the study of a corrosion resistant super hard seal ball valve, put forward a new concept of high quality, high grade trip, corrosion resistance, long warranty period of the hard seal ball valve products.
At the end of twentieth Century, original ball valve floating ball valve and fixed ball valve seat structure is the basic form of the hard seal ball valve.1, valve structure mainly improve the sealing surface hardness and elasticity, prolong the service life of the sealing material is used to improve the mechanical transmission mode, get rid of or reduce the sphere and the sealing surface friction in order to improve or prevent contact abrasion, prolong the service life of the valve. 2, the use of domestic and foreign advanced HVOF coating technology to make the ball and the sealing surface formed of hard sealing. 3, to maximize the hardness of the ball and the sealing surface is to ensure that the high temperature, high pressure, corrosion and particulate medium under the condition of the sealing surface. 4, improve the traditional seal mechanism design is the new structure of ball valve innovation. The traditional crown ball valve design uses the ball and the sealing surface for the line contact, the sealing ring to withstand the pressure is too large, the deformation of the sealing ring is the main factor of low service life. Super hard sealing ball valve is covered with a new structure, the sealing surface to withstand the pressure is relatively reduced, the valve provides a guarantee to improve the service life. Ball flow resistance is small, the flow is not restricted, can be opened and closed rapidly compared with other types of valves, have a comprehensive performance advantages. If the ball valve sealing surface material is used PTFE, nylon 1010, polyimide and other non-metallic materials, the sealing material to withstand pressure, the temperature is not higher than 180 DEG T, the ball field is extremely limited. At present, the metal sealing ball valve sealing surface of the nitriding treatment, hardening process of hard chromium plating or spraying CoCrW hard alloy, but still can not solve the high pressure sealing surface scratches, sealing surface defects of high temperature wear resistance decreased. The project uses spraying process, according to the conditions of use of different spraying method, can meet the requirements of the maximum operating parameters of the valve.The use of advanced processing technology and assembly technology, ultra hard seal ball valve with advanced thermal spraying technology for the super seal ball valve provides a technical guarantee. Ball, sealing ring and the sealing surface of the manufacturing accuracy, smoothness and consistency is the key to the successful development of super hard seal stainless steel ball valve. The sealing material can meet the requirements of high temperature, high pressure and corrosive conditions of granular media sealing conditions.