Model: CDL(F) hot water version
The hot water CDL(F) handles liquids from -15 to 140 °C for boiler feed and condensate. Pressure, NPSH and what to check on hot duties.
| Material | Stainless steel wetted parts |
|---|
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Boiler feed is a natural job for a multistage pump: the boiler is under pressure and the pump has to push water into it. The CDL(F) hot water version is rated for liquids from -15 to +140 °C; the standard version stops at +70 °C.
Hot water boils at low pressure. Near 100 °C there is almost no margin left from the atmosphere, so the feed tank must sit well above the pump to give enough pressure at the inlet. Our article on installation height and NPSH shows how quickly hot water eats into the margin.
Condensate is hot and usually clean, which suits the CDL(F); keep the inlet flooded and vent the pump before starting.
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