Most solid objects entering the pump will pass through the impeller between the impeller vanes. If an object gets caught on the leading edge of one of the vanes, it will slide along the backswept shape towards the perimeter of the inlet. Due to the mechanical self-cleaning design, a sludge concentration up to 8% can easily be pumped. Replaceable wear ring in two materials, gray iron or Hard IronTM, for different operation conditions Hardened gray iron impeller for typical wastewater applications Hard Iron? impeller for abrasive and corrosive applications Stainless steel impeller for special applications that require duplex stainless steel Short shaft overhang reduces shaft deflection and increases seal and bearing life Motor designed for submersible use. Heat is concentrated to the stator core for improved cooling properties. The double mechanical seal system consists of two sets of mechanical shaft seals work independently to provide double security. Available in Tungsten carbide (WCCR) or Silicone carbide (SiC) depending on pumped media. Motor cable SUBCAB ? specially developed for submersible use Offers flexible cooling system, e.g. closed loop cooling system, media cooled or external cooling