In order to reduce the operating torque of the pneumatic ball valve and increase the reliability of the seal, an oil sealed ball valve has emerged. It not only injects special lubricating oil between the sealing surfaces to form an oil film, which not only enhances the sealing performance, but also reduces the operating torque, and is more suitable for high-pressure large caliber ball valves.

Non metallic compensators are involved in various industries
Its good comprehensive performance makes it widely used in many engineering fields. It is widely used in iron and steel plants, smelters, petrochemical plants, thermal power plants, cement plants, atomic power plants and other equipment such as flue gas desulfurization, dust removal equipment, air heating, flow assisted blowing and other equipment at the entrance and exit. It is much better than the metal expansion joint, so it is deeply criticized by users and vigorously promoted.
In the pipeline system, if the thermal stress caused by temperature change, the partial stress caused by equipment vibration and fixed support, and the stress caused by system device deflection exist at the same time, the rigid connection mode will inevitably lead to deformation or destruction of the pipeline system at the thinnest place. If flexible non-metallic compensators are used, this kind of destruction can be prevented. This is related to the unique motion mode of non-metallic compensator. These motion modes determine the multi-dimensional displacement performance of non-metallic compensators.