Parts
Feedwater and condensate parts
Pumps, seals, and the level controls that decide whether the boiler ever sees water.
| Covers | Feed and transfer pumps, seals, check valves, level controls, receivers |
|---|---|
| Water condition | At or near saturation. Intolerant of a wrong seal or lost NPSH |
| Seal choice | Governed by feedwater temperature |
| Repeat failures | Check available NPSH before replacing the pump again |
| Replace on | Duty: flow, discharge pressure, temperature. Not model alone |
A pump that keeps eating seals is rarely a seal problem.
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4 things and we can price it
Get these in the first message and you get a price back, not a list of questions.
- 01 Pump nameplate Make, model, impeller size, and motor data.
- 02 Duty Flow, discharge pressure, and feedwater temperature.
- 03 What failed Seal, bearing, impeller, or motor, and how many times.
- 04 System context Deaerator height above the pump, and the boiler it feeds.
What it is
The short version
Feed and transfer pumps and their seals, check and isolation valves, level controls and probes, receiver and deaerator components, and makeup assemblies.
Feedwater pumps handle water at or near saturation, which makes them unusually intolerant of a wrong seal, a throttled suction, or a lost NPSH margin. A pump that keeps eating seals is rarely a seal problem.
Getting it right
What makes it the right part
- Duty, not just the model
- Flow, discharge pressure, and water temperature. A pump replaced on model number alone can be the wrong pump if the plant changed around it.
- Seal type
- Feedwater temperature governs. This is where most repeat failures live.
- NPSH
- If a pump keeps failing, check available NPSH before replacing it again. The answer is usually there.
- Control type
- On/off, modulating, or VFD. Changing this is a system decision, not a parts swap.
Also in this section
The rest of the room
- Burner & Combustion The parts that stop a burner from lighting, and the ones that stop it from staying lit.
- Trim & Safety The devices an inspector looks at first, and the ones with the least room for improvisation.
- Controls & Instruments Replacement controls and the sensors that feed them, usually on equipment nobody has the manual for.
- Gaskets & Consumables The cheap items that turn a one-day job into a three-day job when they are not on the truck.
- Retrofit Packages When the vessel is sound but the burner or the controls no longer meet the requirement.
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