Inzonex Modular Insulation · Feedwater set
Feedwater runs to the boiler at 100 °C.
Estimate for one feedwater line:
The figures initially displayed are example scenarios.
01 / Equipment
Equipment on this line
02 / Savings
Equipment on this line
Defaults as modelled. Every row is editable on its own page.
| Equipment | Qty | Surface | Bare | Insulated surface | Insulated | Cut | Saving/yr |
|---|---|---|---|---|---|---|---|
| Feed pumps | 2 | 100 °C | 993 W | 26.6 °C | 47 W | 95.3 % | €505 |
| Valves on the feed line | 5 | 100 °C | 920 W | 26.6 °C | 50 W | 94.6 % | €464 |
| Flanged joints | 12 | 100 °C | 2.6 kW | 26.6 °C | 120 W | 95.5 % | €1 348 |
| Set total | 19 | 4.6 kW | 217 W | 95.2 % | €2 317 |
Areas for the valves and the joints come from ISO 12241:2022 Annex A.2.3, Table A.3 at DN32. The pump casing is scaled from the frame against the same pipe.
03 / Outer cover material
Outer cover material
PTFE-coated fabric
Chemically resistant. It holds up to acids and alkalis, takes knocks better and wipes clean. Use it where the line is washed down with caustic.
Silicone-coated fabric
For utilities. Use it where there is no caustic washdown.
How the choice is made
Choose by the cleaning regime: what is sprayed on the plant, and how often.
04 / Questions
Questions.
What temperature is a feedwater line?
The figures here are solved at 100 °C, the temperature taken for this line. Feedwater sits between the deaerator and the boiler, and the exact figure follows the plant.
How much heat does a bare feedwater set lose?
Bare, the set modelled here sheds 4.6 kW. With 50 mm of removable insulation it sheds 217 W, which is 95.2 per cent less.
Can a feed pump be insulated?
The casing, yes. The motor, no. A module over the casing covers the surface that holds feedwater at line temperature. Covering the motor traps its own losses and cooks the windings, so it stays in open air along with the nameplate and the terminal box.
What does insulating a feedwater set save in a year?
On the defaults here, €2 317 a year at 60 €/MWh and 8,000 operating hours. Enter your own fuel price, hours and areas on any item page and every figure recomputes.
Should the outer facing be PTFE or silicone?
PTFE where the plant is washed down with acids or alkalis: it is the chemically resistant face, it takes knocks better and it wipes clean. Silicone on utilities with no caustic washdown. It is a choice about the environment, not about price.