Feed Water Pumps (FWP) pump the feed water from the de-aerator through the HP heaters to the boiler. The major characteristic of FWP is their high differential head. In medium to large size coal- and oil-fired power plants, the main FWP are horizontal barrel type while booster pumps are horizontal single stage double suction type. In small coal and oil captive power plants, the main FWP could be also horizontal ring section or axially split type and the booster pumps horizontaly single stage end suction type
Sulzer provides the following barrel casing as well as ring section and axially split pumps as main feed water pumps for coal- and oil-fired power plants:
| HPT | GSG | CP | |
| Capacities | Up to 4,000 m3/h / 13,800 USgpm |
Up to 900 m3/h / 4,600 USgpm |
Up to 1,000 m3/h / 4,400 USgpm |
| Heads | Up to 4,200 m / 13,800 ft |
Up to 2,600 m / 10,000 ft |
Up to 7,000 m / 23,000 ft |
| Pressures | Up to 450 bar / 6350 psi |
Up to 300 bar / 4,500 psi |
Up to 425 bar / 6,250 psi |
| Temperatures | Up to 220°C / 430°F | Up to 425°C / 800°F | Up to 425°C / 800°F |
| ME | MD | MSD | |
| Capacities | Up to 1,750 m3/h / 7,700 USgpm | Up to 1,000 m3/h / 5,000 USgpm | Up to 3,200 m3/h / 14,000 USgpm |
| Heads | Up to 4,000 m / 13,120 ft |
Up to 2,400 m / 8,200 ft |
Up to 2,900 m / 9,500 ft |
| Pressures | Up to 430 bar / 6,240 psi |
Up to 50 bar / 725 psi |
Up to 300 bar / 4,400 psi |
| Temperatures | Up to 220°C / 430°F | Up to 210°C / 410°F | Up to 200°C / 400°F |
Sulzer provides the following single stage pumps as booster pumps for coal- and oil-fired power plants:
