The metal hard seal pneumatic ball valve can be applied to high temperature and high pressure conditions. It is characterized by small flow resistance, rapid opening and closing, wide range of operating pressure and temperature. However, when the medium through the pneumatic ball valve is liquid solid or gas-solid mixture and the hardness of solid particles is high, the requirements for wear resistance of the sealing surface of the pneumatic ball valve ball and the valve body are high, especially the dry friction between the ball and the valve seat caused by the gas-solid mixture medium, which is very likely to cause excessive wear or strain on the sealing surface and ultimately lead to failure.

What factors should be considered when using pneumatic butterfly valves in chemical plants
The application environment of pneumatic butterfly valves is well known. This product is commonly required between static pipelines and rotating equipment that are prone to vibration. The connection between pipelines and reaction equipment often uses pneumatic butterfly valves with quick assembly joints, sometimes several valves are used in series!
Then pay attention to what elements should be considered when using them in chemical units
Element 1: Product connection mode
One is reception connection, the other is flange connection, and the other is joint connection. The commonly used small caliber pneumatic butterfly valves are usually connected with screw threads and quick connectors, while the larger caliber pneumatic butterfly valves are generally connected with flange type pneumatic butterfly valves. Element 2: safe application
1. The pitch of pneumatic butterfly valve is sensitive.
2. The pneumatic butterfly valve has good anti rat bite and wear resistance, so as to avoid abrasion of internal wires. 3. The pneumatic butterfly valve has good flexibility, repeated bending and flexibility.
4. The pneumatic butterfly valve has good flexibility, no blockage and stiffness.
5. The pneumatic butterfly valve is light in weight and has good divergence in caliber.
6. The pneumatic butterfly valve has strong bending resistance, tensile property and side pressure resistance.
7. The pneumatic butterfly valve has good corrosion resistance and high temperature resistance. Selection of material for Element 3
Corrosion resistance: 316 stainless steel is stronger than 304 stainless steel, and 304 stainless steel is stronger than 201 stainless steel.
316 stainless steel and 18Cr-12Ni-2.5Mo have excellent corrosion resistance, atmospheric corrosion resistance and high temperature strength due to the addition of Mo, which can be used under harsh conditions; Excellent work hardening property (non-magnetic).
304 stainless steel is a kind of universal stainless steel data, and its rust resistance is stronger than that of 200 series stainless steel data. High temperature resistance is also relatively good, up to 1000-1200 degrees. 304 stainless steel has excellent stainless corrosion resistance and good intergranular corrosion resistance. For oxidizing acid, the experiment shows that 304 stainless steel has strong corrosion resistance in nitric acid with concentration ≤ 65% below boiling temperature. It also has good corrosion resistance ability to alkali solution and large part of organic acid and inorganic acid. 201 stainless steel, with the characteristics of acid resistance, alkali resistance, high density, polishing without bubbles, pinholes, etc., is a high-quality material for consumption of various watch cases and strap bottom covers. It is mainly used to make decorative tubes, industrial tubes and some shallow stretched products Many chemical units request to add PTFE lining when selecting media with high corrosion performance, that is, PTFE lined stainless steel hose!