Boiler Feed Pumps & Surge Tanks

Achieve substantial energy savings and operating efficiency by raising the temperature of the boiler feedwater.
Prevent thermal shock to a boiler or to a deaerator (if surge tank) by raising the temperature of the feed water.
Prevent today's smaller, modern boilers from running dry.
Enables deaerators to run effectively on systems with more than 20% return hot condensate.
Manages fluctuations in capacity and temperature of the feed water for deaerators.
Controlling fluctuations in capacity minimizes the effects of corrosive gases on the boiler.
Helps prolong the life of the boiler system.
Mixes hot condensate return with cold make-up water to create a constant, blended water temperature to prevent thermal shock to boiler.

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Designed to provide feedwater to a boiler. A level controller on the boiler activates the boiler feed pumps. Both atmospheric tanks and pressurized tanks are available with or without a direct injection style heater (sometimes called a preheat tube). Pressurized tanks can be ASME code constructed or ASME code stamped. Tanks material may be cast iron, black steel or stainless steel; black steel tanks maybe epoxy-lined or plasite-lined. A typical package includes the receiver, feed pumps assembled and piped, along with a mounted, pre-wired control panel. Unit can be elevated on steel frame.

Type EMV used as a surge tank for a Type .005 DA-STVP deaerator A surge tank increases the storage capacity of boiler feed system. It performs similar function to a boiler feed unit except it feeds a deaerator instead of a boiler. A surge tank is typically used on systems having more than 20% hot condensate returns. Two designs are available—either a two-compartment style (deaerator models with "2C") or a two-tank style (deaerator models with "2T"). The tank can be floor-mounted or elevated.

The make-up water is added into the surge tank and blended with the hot condensate returns to avoid shocking the deaerator with extreme variations in water temperature and capacity. The pumps, typically referred to as transfer pumps, must run continuously.

Unit can be built to handle a wide range of flows and pressures. Receiver materials can be steel or cast iron; cast iron receivers come with a standard 20-year warranty against corrosion failure. Steel receivers available in 3/16" or thicker, black steel or 300 series stainless steel; black steel receivers can be epoxy-lined or plasite-lined. Steel receivers can have flat heads or dished heads; floor mounted or elevated; and cylindrical or rectangular shaped. Steel receivers can be custom designed in terms of diameter, length and height to meet job specific requirements. Steel receivers can also be ASME code stamped. Standard cast iron receiver is available up to 500 gallons using a single tank; larger capacities possible with custom designs using multiple receivers.