IHG Series Vertical Inline Chemical Pump

The IHG series is a vertical inline centrifugal pump manufactured to international standards and using an up-to-date hydraulic model, published with high efficiency and energy-saving characteristics. Its stated advantages are a small footprint, low construction investment, low noise and no pollution, which makes it a common choice for urban water supply, high-rise buildings and long-distance water supply.

The published performance envelope is 1–1500 m³/h of flow with heads from 7 to 150 m. Because the suction and discharge connections sit on a common centre line, the pump can be mounted directly in a straight pipe run, and the vertical arrangement removes the need for a long baseplate and coupling guard.

The pump is published for clear water and for other liquids whose physical and chemical properties are similar to those of clear water. For each model the manufacturer lists three duty points across the impeller range, so a single casing covers a band of flow and head rather than one fixed operating point.

• Urban water supply: Boosts mains pressure in town and district water networks.
• High-rise buildings: Provides inline pressure boosting on upper floors and in riser systems.
• Long-distance water supply: Works in series as a booster station on long supply mains.
• Building services: Circulates heating, cooling and general service water in buildings.
• Industrial process water: Feeds clear process water to plants where no solids are present.
• Fire and utility systems: Serves clear-water utility circuits that need a compact inline unit.
• Irrigation: Supplies clean water to irrigation and distribution lines.

1. Note that the published table lists three duty points per model: choose the point that matches the required flow and head rather than the largest figure in the row.
2. Select from the published A and (I) variants when the duty point falls between two standard models, since they are the trimmed and alternative impellers of the same casing.
3. Confirm the liquid is clear or has properties similar to clear water; the series is not published for sludges, slurries or aggressive chemical media.
4. Use the 2800 rpm and 2900 rpm data separately, because the smallest sizes 15-80 and 20-110 are published at 2800 r/min.
5. Check the inlet / outlet diameter column against the pipe run before ordering, since the inline body must match the existing line size.
6. Allow for the vertical installation height in the plant layout; the inline arrangement saves floor area but needs headroom above the motor.