Efficient Operation
As valves are opened, the Welden Steam Generator increases output to maintain constant pressure. With pressure control, output is matched to the load. Welden offers the only direct-fired steam or vapor generating system with an output range starting at 1/7 of the full output.

Lower Power Requirements
Other steam generator curing systems of equivalent output use 30-40 HP electric motors to power blowers. Operating at full horsepower, those systems throttle or dump excess air to achieve lower outputs. The Welden 7S25 Direct-Fired Steam Generator develops only 18 HP at full output, and consumes even less power at lower outputs (see specifications). In most applications, yearly electrical savings could be from 30,000 to 50,000KW.

Automatic Controls
The Welden Steam Generator is pressure controlled, allowing use of sophisticated technology. Control systems are custom assembled to meet customer needs. A typical control system includes a preset timer. After the preset time has elapsed, the Welden Steam Generator starts and is regulated by a thermo-couple-operated temperature controller. When the product to be cured has reached the desired temperature, a cure timer starts. The temperature controller cycles the generator on and off to hold the desired temperature, then at the end of the cure cycle the cure timer shuts down the generator or closes the control valve.

Safety Controls
Sensing of blower pressure by the Honeywell flame programmer is followed by a 30-second air purge of the burning chamber. After ignition, an ultraviolet sensor proves the flame. Then main burners start automatically.