How to reasonably and correctly select the model and specification of pneumatic ball valve? According to the different sealing surfaces, pneumatic ball valves can be divided into hard sealing pneumatic ball valves and soft sealing pneumatic ball valves. Hard sealed pneumatic ball valve adopts hardfacing, spraying, nitriding and other hardening technologies to harden the sealing surface of the ball and the sealing surface of the valve seat. The use temperature of hard sealed pneumatic ball valve is much higher than that of sealed pneumatic ball valve in the environment of high temperature and wear resistant media with particles. The soft seal pneumatic ball valve uses PEEK, PTFE, PPL and other engineering plastics as the sealing valve seat. The sealing surface of the ball is generally used in the medium pipeline with a temperature lower than 200? The use temperature does not have different requirements for the pneumatic ball valve. At normal temperature, it usually refers to - 29 ℃ - 200 ℃. Cast steel pneumatic ball valve and soft seal valve seat are usually used. If the temperature is between 200 ℃ and 425 ℃, the cast steel valve body can also be used, but it must be a metal sealing surface. If the temperature exceeds 425 ℃, the chrome molybdenum steel or even stainless steel must be used. Low temperature steel is used as valve body material when the temperature is lower than - 29 ℃ - 46 ℃- The structural materials of low temperature pneumatic ball valves at 46 ℃ - 101 ℃ shall be subject to cryogenic treatment; Austenitic stainless steel must be used as structural material when the temperature is lower than - 101 ℃

The hose design will make it more beautiful
In today's high buildings, how can we use them to be more beautiful in our construction industry?
First, the establishment of high-rise buildings, earthquake resistance, fire prevention and other disaster prevention equipment;
Second, when multiple buildings are in parallel, the gap formed when connecting the floors, or the gap formed because the compensator cannot meet the deformation requirements when the water pipe passes through the gap, plays a role in simplifying;
Third, it is used for connection and vibration reduction of various pipelines and pump valves to reduce the impact of working vibration of various pipeline systems and heating and cooling equipment.