Electric Steam Generators

Electric steam generators are perfect for applications requiring efficient, high quality steam. Applications include: Laboratory use, hospitals, steam for small tanks, reactions and distillations, autoclaves, food products, jacketed vessels for processing waxes, paraffins, glues, resins and varnishes and wood-bending, as well as for powering small, intermittent, low-steam consuming loads. Hence, electric steam generators or electric boilers are the reliable answer for producing high or low pressure steam for molding, laminating, embossing, drying, humidifying, cooking, cleaning, degreasing, sterilizing, vulcanizing, and heating.

Electric steam generators can also be used for standby operations in off-seasons or when a larger boiler is shut down or unavailable. In these cases, a main waterline pressure 10 psig greater than the operating pressure of the steam generator is required for automatic water feeding.

Primary advantages of electric steam generators include:

• Safe heat source - no on-site products of combustion
• No fumes, no combustible fuel, no fuel storage
• Eliminates traditional boiler installations: no chimney - no long steam lines - no enclosures - just connect to utility service at installation
• Installs wherever you want steam - locate generator at point-of-use
• 98% efficient, conserving energy and water
• No boiler chemicals required
• Easy and quick to install, requiring only a water feed connection and an electrical hook-up.
• Steam available at the flip of a switch.
Standard Features of electric steam generators include:

• LIQUID LEVEL / LOW WATER CONTROL
The electronic control automatically maintains proper water level, and shuts off the generator when water supply in the boiler drops below a safe operating level.

• WATER LEVEL SIGHT GLASS
Allows constant observation of water level while boiler is in operation

• INTEGRAL ELECTRICAL CONTROL
Magnetic contactors for energizing the heating elements. Integrally mounted in the control unit.

• BLOWDOWN/DRAIN VALVE
Facilitates emptying the pressure vessel during blowdown drain sequence.

• STEAM OUTLET VALVE
Provides easy control of steam.

• LONG LIFE HEATING ELEMENTS
Industrial grade, heavy-duty stainless steel heating elements equipped with one piece resistance welded terminations for added strength and safety.

• OPERATING PRESSURE CONTROL
Operates automatically to maintain steam pressure within generator.

• STEAM SAFETY VALVE
ASME Code valve, automatically opens to reduce pressure should excessive steam cause pressure build-up.
• STEAM PRESSURE GAUGE
Allows visual observation of steam pressure over full range.

• ENERGY SAVING AND MINIMUM MAINTENANCE

Fully insulated pressure vessel minimizes heat loss and maximizes energy savings. How electric steam generators work: Within the pressure vessel of the electric steam generator, a cylinder, open at the bottom, divides the vessel into two concentric chambers. The outer chamber is the regulating chamber. The inner chamber is the generating chamber. Suspended within the generating chamber are the electrodes. Electric power is easily connected to the three electrode terminals.

A prescribed quantity of Electrolyte is dissolved in water and poured into the electric steam generator through the hand fill. This Electrolyte remains in the generator until drawn off with the water through the drain valve. When electric power is turned on, heat is generated by the resistance of the water to the passage of current between the solid electrodes. Steam produced in the generating chamber then flows through the steam valve outlet and the steam header to the pressure-regulating valve or to the regulating chamber.

Adjusting the screw on the electric steam generator pressure regulator valve sets the desired pressure. When the electric steam generator system is turned on, air is automatically exhausted through the air eliminator, which closes when heated by the steam. If the steam consumed is less than maximum, pressure built-up in the generator chamber until it reaches the pressure limit set by the pressure regulator. At this point the pressure regulator valve partially closes, reducing the amount of steam entering the regulating chamber. This unbalances the system momentarily, permitting the water to rise in the regulating chamber due to the high-pressure condition in the generating chamber. As the water level drops in the generating chamber the electrodes are progressively exposed, and the amount of steam being generated decreases.