- Features & Benefits
- Other Info
The Dickow SC Series are single or multistage self-priming, horizontal, side-channel pumps with end suction and vertical discharge flanges. The side-channel pump with its high differential head (achieved at low speed) has the advantage of operating more economically than standard centrifugal pumps for low capacities and high heads. The SC Series pumps are heavy duty pumps suitable for handling clean liquids without solids in chemical and petrochemical industries. The pumps are also able to prime empty suction lines after initial filling with liquid.
The maximum operating temperature for standard designs is 180°C. Special designs for higher temperatures (up to 240°C) are available on request. The maximum operating pressure is 40 bar.
To achieve low NPSH-conditions, the impeller on the suction side has an enlarged eye area. The rotating star-shaped side-channel impellers are fitted in a chamber between the suction and pressure disk and keyed to the pump shaft in floating position. No hydraulic thrust load exists.
To achieve the self-priming capability, high efficiency and rated differential pressure, there are tight clearances between the rotating impeller and the stationary disks. During priming, a stable fluid film between the impellers and the disks centres the impeller in the chamber. In applications where prolonged dry-running can be a problem, or when handling volatile liquids with low viscosities, the pumps can be fitted with additional SiC-rings to avoid contact between the rotating and stationary parts.
The suction and pressure disks are sealed to the atmosphere by confined O-rings with metal to metal fit, to prevent blow outs. In the shaft area, floating graphite impregnated PTFE-inserts are located to reduce shaft deflection and wear. The differential head is built up in the side-channel of the pressure disk.
When coupled with Ex-drive motors, the pumps can be applied in hazardous area Group II, Category 2. The pumps meet the basic safety and health requirements of Explosionproof Directive 94/9 EC and are suitable for plants with increased safety requirements.