The seal of plate mesh screen changer mainly relies on manual adjustment and pressure activation seal. Aiming at the leakage reasons, such as wear and tear caused by sliding plate movement, degradation of sealing pressure ring, and damage of removal filter net, etc. One way is to reduce the possibility of leakage by increasing the pressure on the nose. Since seals are used to respond to extrusion pressures, they only work at peak pressures at higher pressures. At lower pressure, the seal will re