Cast Iron or Stainless Steel Pipeline Pump? A Quick Decision Guide
| Liquid or site | Our usual suggestion |
|---|---|
| Clean water, cooling water, heating water | Cast iron ISG or IRG |
| Drinking water where rust staining matters | Stainless steel |
| Mild chemicals, process liquids | 304 stainless IHG |
| Chlorides, salt water, stronger chemicals | 316 stainless IHG |
| Corrosive liquid, ordinary surroundings | Stainless casing and impeller on a cast iron base |
| Corrosive surroundings or wash-down | Stainless throughout |
Why not stainless for everything?
It costs considerably more, and for clean water a cast iron pump lasts for years. Spend on stainless where the liquid or the surroundings demand it.
What decides the grade
The chemical, its concentration and its temperature. Send those, and we will check both the casing material and the seal.
Read about a real IHG stainless order.
Products in This Series
Pipeline Centrifugal Pumps & CDL Multistage PumpsDuty and Standby Pipeline Pumps: Layout and Control
Two pipeline pumps in parallel, one running and one waiting: valves, check valves, alternation and why the standby must be exercised.
Pipeline Centrifugal Pumps & CDL Multistage PumpsLarge CDL(F) Pumps: 65 to 150 m³/h at Up to 161 m
The CDL(F) 65, 85, 120 and 150 move 65 to 150 m³/h at heads up to 161 m with motors up to 75 kW. Sizes, ports and the -1/-2 builds.
Pipeline Centrifugal Pumps & CDL Multistage PumpsSmall Flow, High Head: CDL(F) 2 and CDL(F) 4 Up to About 200 m
The CDL(F) 2 and 4 deliver 2 and 4 m³/h at heads up to 198 m and 178 m. Where these small multistage pumps fit and how to pick the stage count.
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