3 The advantage of pneumatic ball valve is the lowest flow resistance (actually zero). It can be reliably used in corrosive media and low boiling liquid because it will not be stuck during operation (without lubricant). In a large range of pressure and temperature, it can achieve complete sealing. It can realize fast opening and closing, and the opening and closing time of some structures is only 0.05~0.1s to ensure that it can be used in the automation system of the test bench. When the valve is opened and closed quickly, the operation is free of impact. The spherical closure can be automatically positioned in position. The working medium is reliably sealed on both sides. When fully open and fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, so the medium passing through the valve at high speed will not cause erosion of the sealing surface. Compact structure and light weight make it the most reasonable valve structure for cryogenic medium system. The valve body is symmetrical, especially the welded valve body structure, which can well withstand the stress from the pipeline. The closing element can withstand the high differential pressure when closing. The pneumatic ball valve with fully welded valve body can be directly buried underground, so that the valve internals are not corroded, and the maximum service life can reach 30 years. It is the most ideal valve for oil and natural gas pipelines. As the pneumatic ball valve has the above advantages, it has a wide range of applications. The pneumatic ball valve can be used from 8mm to 1200mm in nominal diameter. Nominal pressure ranges from vacuum to 42MPa. The operating temperature ranges from - 204 ℃ to 815 ℃.

Teach you how to judge a pneumatic butterfly valve
To see whether a pneumatic butterfly valve is good or bad, you should look, smell, ask and feel like a doctor.
We need to buy some pneumatic butterfly valves when we are decorating our families. Now small editors teach you how to buy good hoses.
The first is to identify materials
However, the hoses on the market are mainly made of stainless steel and aluminum magnesium alloy wires. Is the stainless steel wire better than aluminum wire? The tensile force of stainless steel wire is greater than that of aluminum magnesium alloy wire, and the corrosion resistance of stainless steel wire is not easy to oxidize; Stainless steel braided hose surface friction hand will not become dark if the gray is alloy wire; The appearance color of stainless steel hose is black bright stainless steel wire pale dark bright alloy wire. Through comparison, stainless steel is easy to use. I once taught you what to judge the material. The second is what to see whether the braided pipe is qualified from the surface
When purchasing braided hose, we must first watch its weaving effect. If the weaving does not skip silk, the higher the density of non overlapping silk weaving, the better. How to see the density of braided hose up and down: look at the gap between each strand of silk and the wire diameter); Check whether the braided hose is made of stainless steel wire; Check the quality and material of other hose accessories; Use your nose to smell whether the hose water inlet emits a pungent smell: the higher the amount of glue in the hose, the better the pungent property, and the better the performance of tension blasting. In conclusion, if you can understand the above points, you can buy a good hose