Features & Specifications

I) Impeller

•  Open impeller with curved vanes as a standard feature.
•  Optional closed impeller with optimized hydraulics when a particularly low pump NPSH is required.
•  Large metal core for reliable torque transmission.
•  Secured against loosening if the pump is started up in the wrong direction of rotation.
•  With back vanes to offset axial thrust.

2) Bearing Frame

• Very sturdy one piece cast iron bearing frame with oil bath lubrication.

3) Casing

•  Thick walled plastic lining on mild steel armour.
•  Armouring bears system pressure and pipe forces. No need for expansion joints.
• Virgin lining without fillers.

4) Pump Shaft

•  Deflection resistant pump shaft large shaft diameter, also in the area of the mechanical seal,
  ensures very smooth running and low shaft deflection – even in Q/H boundary conditions.

5) Back Plate

•  A special back plate was designed for the stationary internal seals.
•  Open seal chamber promotes the discharge of solids.
•  Flushing bores ensure good medium circulation.

6 ) Mechanical Seal Options

•  Internal and external mechanical seal.
•  Cartridge seal.
•  Double seal for solids laden and crystallising media.

7) Shaft Sleeve

•  Shaft sleeve made of Al O , SSiC, Hastelloy, Alloy-20 etc are options available.

Application

•  Corrosive, pure and contaminated media in the chemical, pharmaceutical
  and petrochemical industries, in metal processing, waste disposal and
  recycling etc.
•  When stainless steel is not sufficiently resistant.
•  Alternative to expensive Hastelloy, Monel, tantalum pumps.
• When anti-adhesive surfaces are important.
  The VVS is particularly economical and reliable with
•  Less environmentally critical or hazardous media as pumps with single mechanical seals
  are lower priced than sealless pumps.
• High solids-laden, gas-containing or other problematic media especially when sealless
  pumps are unsuitable.
•  Badly lubricating media: gas-lubricated mechanical seals.