2. The hardening and surface treatment of spheres are three ways to improve the quality of sealing pairs of pneumatic ball valves. The pneumatic ball valve sphere is generally processed by 2Cr13. Its surface hardness is about HB217, which is easy to be damaged not only in working conditions, but also in the process of assembly and testing. Our company adopts solid chromizing process for test, which has been proved to be very effective after one year's practice. After chromizing, the surface hardness is higher than HV1000 degrees. After the carbon steel ball is infiltrated, the surface chromium content is as high as 60% - 80%. After grinding, the corrosion resistance in seawater, nitric acid, acetic acid and other media exceeds that of the impermeable 2Cr13

Correct connection method for flange pneumatic butterfly valve device
Flange pneumatic butterfly valve is an important connecting component in engineering technology, which is separated from corrugated flexible pipe, mesh sleeve and joint. Flange pneumatic butterfly valve. One end is a flat welding flange, the other end is a looper flange, the flange material is carbon steel, the nominal diameter is 200mm, the nominal pressure is 1.0MPa, and the length is 3000mm.
1、 Classification of flange type pneumatic butterfly valve: spiral bellows; The spiral corrugated pipe is a pipe shaped shell with spirally arranged corrugations. There is a spiral rising angle between two adjacent corrugations, and all corrugations can be connected through a spiral line. The annular bellows is a tubular shell with closed circular corrugations. The waves are connected in series with circular corrugations. The annular corrugated pipe is formed by seamless pipe or welding. Due to the limitation of processing method, the length of single tube is usually shorter than that of spiral bellows. The advantages of annular bellows are good elasticity and small rigidity.
2、 Connection method of flange type pneumatic butterfly valve: blue connecting wire, buckle connecting quick connector connection 3. Precautions for application of flange type pneumatic butterfly valve device
1. The corrugated pipe of stainless steel hose is made of chrome nickel austenitic stainless steel, and attention shall be paid to avoid pitting corrosion of nitrogen ions and corrosive damage of dilute sulfuric acid and dilute sulfuric acid during operation.
2. After the user stops the hydraulic test on the equipment and pipeline system equipped with stainless steel hoses, the impact of rust blocks and the accumulation of sediment containing chloride ions shall be avoided to form corrosion and mechanical damage.
3. When installing the pneumatic butterfly valve, it is necessary to avoid splash scalding and mechanical damage during welding, otherwise leakage will occur.
4. The airtight pipe system shall strictly abide by the safe operation procedures to avoid hose pulling off or bursting due to overpressure caused by improper operation or other factors.
5. Please carefully digest the examples of stainless steel hose devices and strictly follow the correct schematic device.