Model: ISG, IRG, IHG, ISW pipeline pumps
What the numbers and letters in an ISG pipeline pump model mean: inlet size, impeller diameter, the (I) high-flow version and A, B, C trims.
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| Part | Example 50-160(I)A | Meaning |
|---|---|---|
| Prefix | ISG / IRG / IHG / ISW | Vertical clean water / hot water / stainless chemical / horizontal |
| First number | 50 | Inlet and outlet size, mm |
| Second number | 160 | Nominal impeller diameter, mm |
| (I) | (I) | Higher-flow version of the same frame |
| Letter | A | Trimmed impeller: A, then B, then C give less flow and head |
Compare two pumps from our table. The 50-160 is rated 12.5 m³/h at 32 m with a 3 kW motor. The 50-160(I) is rated 25 m³/h at the same 32 m, with a 4 kW motor. Same inlet, same impeller size, twice the flow.
The 40-250(I) family shows the trims clearly: the full impeller gives 80 m, A gives 70 m, B 60 m and C 52 m, with motors of 11, 7.5, 7.5 and 5.5 kW. A trim lets you match the duty without wasting power on head you do not need.
Some frames carry the same model name at 2900 and 1450 r/min. The 100-200, for example, is 100 m³/h at 50 m with 22 kW at the higher speed, and 50 m³/h at 12.5 m with 3 kW at the lower one. Always give the speed or the motor power with the model.
See every build in the selection table.
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