The operation pressure of the mechanical seal for pumps is the pressure of the sealing interior sealing medium. Since the sealing indoor medium pressure is not equal to the working pressure of the pump, the mechanical seal work pressure is equal to or lower than the working pressure of the pump, so the sealing operation pressure is determined according to the structure of the pump. For example, the single-stage cantilever pump should think of an imbalance hole or a back blade according to the multi-stage pump level, according to the installation of the multi-stage pump level.
Usually in the practice of mechanical seals for pumps, the work pressure is higher than 3 MPa, and the equilibrium seal is used to select a balanced seal, and the multi-stage seal can be sealed and stepped down step by step. The structural type (such as multi-end mechanical sealing, etc.) is considered to be considered. Typically, there is a non{{0}}equilibrium seal at 0.7 MPa below 0.7 MPa or less than the gasoline commodity. It is also possible to select a non-equilibrium seal at a value of less than 6.6 mPa.m / s. For oils with lower density below {{10}}.6kg / L, it is equilibrated to seal. The balanced seal was selected at 0.2-0.33 MPa pressure at 0.2-0.33 MPa pressure on a low viscosity and poor lubricity.
