... concentricity of shaft, strong rigidity, small vibration and prolonged service lifte of mechanical seal.Disadvantage : only ... evaporators, concentrators, distillation towers, decanting of syrups, and purified-water loops in the pharmaceutical industry.2. ... FPM (Viton? and PTFE. Connections: Clamp, SMS, RJT, etc. Motors with additional protection.(movable, Explosion proof). Trolley and/or Switchboard. ...