Boiler circulating pump

This is the pump peculiar to the forced circulation type boiler. This pump is necessary for protection of the cooling pipe of the furnace. It circulates water in the cooling pipe of the furnace when starting the operation and at low load and always maintains the flow in the pipe approximately at a fixed speed.

Boiler feed water pump

Ring section type

This is the pump for sending high pressure and high temperature fluid to the boiler. The types vary depending upon the pressure. The single casing type is used for the combined cycle, the subcritical steam power generation, etc. In the case of the pump of the ring section type, suction, intermediate and discharge casings are joined tightly with bolts and compose the pump casing.

Horizontal split type

The casing is split in the upper and lower parts and composes the pump casing. Fabrication and disassembly is easy but this type is inferior to other types with respect to the capacity of pressure resistance.

Double casing internal horizontal split type

This is the multi-stage pump having the double casing, the inner casing contained in the outer casing. Among various boiler feed water pumps, this pump is adopted for high pressure and high temperature application as in the subcritial steam power generation. The double casing is also called "barrel type". As in the case of the single casing, there are differences in the way of splitting the inner casing, and special features are the same.

Double casing internal ring section type

This is the multi-stage pump having the double casing, the inner casing contained in the outer casing. Among various boiler feed water pumps, this pump is adopted for high pressure and high temperature application as in the subcritial steam power generation. The double casing is also called "barrel type". As in the case of the single casing, there are differences in the way of splitting the inner casing, and special features are the same.

Circulating water pump

Variable pitch vane circulating water pump

This is the pump to send cooling water to the condenser. Depending upon the water intake source, the vertical type is usually used when taking water directly from sea, and the horizontal type is commonly used when taking water from the cooling tower. The type having the controllable movable impeller is called the variable pitch vane type.

Fixed pitch vane circulating water pump

The fixed type impeller as shown to the left is called the fixed pitch vane type.

Condensate pump

This is the pump for pumping condensate from the condenser. This is the important pump that should be regarded, so to speak, as the starting point of the main cycle of the power plant.