Dry running is no problem for tough sealless pumps
A
Pump Engineering product story
Edited by the Engineeringtalk editorial team
Sep 10, 2003
ASV sealless eccentric pumps are suitable for many fluids transfer applications, providing tough and durable performance with minimal maintenance requirements.
ASV sealless eccentric pumps are suitable for many fluids transfer applications, providing tough and durable performance with minimal maintenance requirements.
Recently introduced by liquids handling specialist Pump Engineering, these self- priming pumps are unaffected by dry-running, can pump in either direction and have no metal contact parts.
Their robust, sealless design and special flexible liner within a tough thermoplastic construction, means they are suited to handling corrosive, viscous, abrasive liquids, or liquids with entrained air.
The pumps operate with a rotor mounted eccentrically on a shaft, and this rotates within a flexible liner.
The liner forms the inner wall of a cylindrical chamber with the outer wall of this chamber being the pump body.
As the shaft rotates, the rotor distorts the liner, "squeezing" the liquid through the pump.
This operating principle eliminates the need for sliding parts, minimising wear and tear and maintenance associated with other pump designs.
As only two components are in contact with the liquid, the pump is suitable for high-purity chemicals, and its gentle action makes it ideal for shear-sensitive products and chemicals such as photographic emulsions.
ASV pumps are available in two versions: type F has a capacity of 30 litre/min and can be close coupled to an electric or air motor; type L is suitable for mounting on a baseplate with motor, coupling and guard.
The choice of materials for body and hose connections includes polypropylene, PVDF or PVC, and materials for liners includes Nitrile, Viton, EPDM, Neoprene and Hypalon.
Competitively priced, ASV pumps have many applications in the OEM market for transfer or metering applications.
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