• Bonnet head type “A” is the most economical.
• Head type “B” permits removal of the tube bundle from the shell without dismounting the head piping.
• Head type “D” provides a more economical solution for this problem but is restricted to small nozzle diameters.
• Channel head “C” permits the checking and plugging of leaking tubes without dismounting the head.

Fuel Oil Preheaters

Fuel Oil Heaters serve two major purposes:

• to make fuel oil "pumpable"
• to provide the requested atomization in the burner.

Fuel oil has a high viscosity and when stored at the ambient temperature cannot be pumped. The first step is to preheat the fuel oil inside the storage tank, reduce its viscosity , and then dispense it by means of pump suction.

Alstrom "HST," "ST," "HDT," and "DT" fuel oil heaters are designed for this purpose.

Heat Recovery Shell & Tube Heat Exchangers recover and utilize the heat, from liquid and gas streams, which is normally wasted.

Generally in the boiler industry, boiler water blowdown is used to maintain the accumulated chemical concentration levels recommended by the boiler manufacturer. The wasted heat is transferred to the make up water in our ABD heat exchanger. Depending on steam consumption, the ratio of the blowdown water to the make up water volume flow rate is 0.02-0.20. The best heat transfer occurs when the blowdown water passes through the multiple passes of tubing and the make up water flows through the shell

Alstrom heat exchangers ATC provides the countercurrent heat transfer for the crossing temperatures common in heat recovery installations. Depending on the temperatures and flow rates of the hot and cold streams, multiple shell heat exchanger AMS may be required.