Flexible impeller

FLEXIBLE IMPELLER PUMPS - how it works -
The variation of vane volume during the rotation cause the excellent dry selfpriming feature of the pump.
Pump is also reversible.

File:Close coupled flexible impeller pump.jpg

A close coupled flexible impeller pump, made of stainless steel

A flexible impeller pump is a positive-displacement pump that by deforming the impeller vanes, draw the liquid into the pump housing and move it to the discharge port with a no pulsating flow rate. This principle combines gentle pumping with a high dry self-priming action.

Types

• Execution: close coupled, bare shaft, with hidraulic motor, belt driven, gearmotor, mechanical speed variator, frequency converter,...
• Fittings: DIN 11851, Garolla, BSP, Macon, Triclover, SMS, BSM/RJT,...

Uses

Particularly suitable for transfer of viscous, delicate, and slurry fluids even with high solid content. Widely used in the oenological field, food processing, chemical industry, cosmetic and marine field.

Materials

Pump housing can be made in high grade stainless steel, in bronze for marine application, but also in other material.

The impeller can be made made of:

Flexible Impeller

• Natural Rubber (NR) - Excellent for water based liquid, highest mechanical resistance.
• Neoprene (CR) - Good balance between chemical and mechanical resistance.
• Nitrile (NBR) - Excellent resistance to oils and fats.
• EPDM - Best for hot fluid, for acid and alkaline fluids.
• Silicon (VMQ) - Best for very high temperature.

The end face mechanical seal can be made made of:

• Ceramic
• Stainless steel
• Graphite
• Tungsten carbide
• Silicon carbide
• Elastomers: NBR, EPDM, VITON,...