Standard Features:
  • Components are built by a manufacturer holding a valid ASME Certificate of Authorization in accordance with ASME BPVC Section I – Rules for Construction of Power Boilers.
  • A.S.M.E. CSD-1 Compliant
  • UL Listed and labeled under UL 834
  • Dual Pressure Controls (UL 353)
  • High Pressure Safety Reset. (UL 353)
  • Low Level Cut-Off (LLCO) (UL 353)
  • 15 psi Safety Relief Valve (A.S.M.E. Section I - V-Stamp)
Recommended Options (Non-Standard):
  • Spare Parts Package
  • Motorized Automatic Flush and Drain (MAFD)
  • Single Service Transformer
  • 5-Micron Water Filter
Click here to read the NB-370 synopsis.

Unit of Measure



N/A Electro-Steam™


N/A Low Pressure

Electrical Power Rating

N/A 240 kW
Power Supply Voltage1 N/A 380 VAC415 VAC440 VAC480 VAC600 VAC


N/A 3


N/A 50 Hz60 Hz

Boiler Horse Power

N/A 24 bhp
Steam Capacity2 N/A 828 lb/hr375.57 kg/h

Water Consumption

N/A 99.22 gal/h375.57 L/h

Gross British Thermal Units (BTU) Output

N/A 803409 Btu/hr

Maximum Boiler Pressure

N/A 15 psi

Operating Pressure

N/A 0 to 11 psi

Maximum Boiler Capacity

N/A 26.5 gal

Note for Operating Pressure

N/A Factory Set at 80 psi

Boiler Fill Capacity

N/A 22.0 gal
Boiler Material 3 N/A Carbon Steel

Cabinet Material

N/A 304 Stainless Steel

Plumbing Material

N/A Brass (Schedule 40) Carbon Steel (Schedule 40)

Industry Standards

N/A American Society of Mechanical Engineers (ASME) - Boiler and Pressure Vessel Code American Society of Mechanical Engineers (ASME) - CSD-1 Canadian Underwriters Laboratories (cUL) Underwriters Laboratories (UL)


Amperage at 380 Volt (V) Alternating Current (AC) Voltage (3Ø Phase)

N/A 364.6 A (182.3 A per Box)

Amperage at 415 Volt (V) Alternating Current (AC) Voltage (3Ø Phase)

N/A 333.9 A (166.9 A per Box)

Amperage at 440 Volt (V) Alternating Current (AC) Voltage (3Ø Phase)

N/A 314.9 A (157.5 A per Box)

Amperage at 480 Volt (V) Alternating Current (AC) Voltage (3Ø Phase)

N/A 288.7 A (144.3 A per Box)

Amperage at 600 Volt (V) Alternating Current (AC) Voltage (3Ø Phase)

N/A 230.9 A (115.5 A per Box)



N/A 51 in

Width (No Options Included)

N/A 30 in

Width (Motorized Automatic Flush and Drain (MAFD) Option Included)

N/A 34 in


N/A 37 in

Minimum Clearance

Total Height

N/A 45 in

Total Length

N/A 120 in

Total Width

N/A 60 in

Plumbing Connection Sizes

Water Inlet

N/A 1/2" NPT (National Pipe Thread) (Female) - Y-Strainer, Brass

Steam Outlet

N/A 1" NPT (National Pipe Thread) Union - Ball Valve, Brass

Safety Valve

N/A 2" NPT (National Pipe Thread) (Female) - Safety Valve, Brass


N/A 1" NPT (National Pipe Thread) (Female) - Ball Valve, Brass

Additional Drain (Motorized Automatic Flush and Drain (MAFD) Option Included)

N/A 1" NPT (National Pipe Thread) (Female) - Motorized Valve, Brass


Spare Parts Package Includes

  • 18-Month Warranty (12-Month Standard)
  • (2) Electric Heaters and (2) Heater Gaskets
  • (2) Sight Glass Tubes and (4) Washers
  • (1) Pressure Control
  • (1) Contactor

Motorized Automatic Flush and Drain (MAFD)

N/A During Start-Up before steam pressure is accumulated, the Motorized Automatic Flush and Drain option cycles fresh water through the boiler for 0-300 seconds (Factory set for 180 seconds or three (3) minutes). As old water is drained out, fresh water will be cycled in. This drain valve will not open if boiler pressure exceeds 5 psi, and the electric heaters are locked out during flush cycle.

Single Service Transformer

N/A Supplied standard with all portable steam generators, the Single Service Transformer steps down the primary high voltage to provide 120 VAC Single Phase (1Ø) to the controls; with this option, only the one (1) primary high voltage supply is required.

5-Micron Water Filter

N/A 2-stage, 5-micron water filter installed into incoming water line to reduce sediment, dirt, rust, chlorine, and even odor from incoming water supply.
Manual Low Water Reset4 N/A Manual Low Water Reset trips if the electric heaters shut-off because of a low water condition. Reset must be manually pressed to resume steam production.

Portable Mounting Includes

  • Wheels
  • Push Handle
  • Single Service Transformer Option

Water Feed Booster Pump

N/A The minimum requirement for your water pressure is the operating pressure +25 psi; if your water pressure is below this requirement, this option must be added. The Water Feed Booster Pump increases your incoming water pressure to overcome the operating pressure of the steam generator. The Pump requires a 5-150 psi water supply with a minimum flow rate of 2 gpm.
  • 1 Electro-Steam™ 100-240 kW electric steam generators require three (3) power supplies: Two (2) primary high voltage supplies and one (1) secondary 120 VAC 1Ø, 50/60 Hz supply. Each generator is custom built to accommodate two (2) supplies of only one (1) customer specific high voltage for the heaters. 120 VAC 1Ø, 50/60 Hz must also be supplied for the controls, unless the Single Service Transformer option is added.
  • 2 Calculations are based off of a 212 °F boiler feed-water temperature. Boiler feed-water temperatures that range between 60 °F and 140 °F, are approximately 80% to 90% of the calculated values shown. Boiler feed-water must not exceed 140 °F.
  • 3 Wetted Surfaces.
  • 4 A Manual Low Water Reset Button is supplied standard with every steam generator, but it is disabled. If this Reset Button is required as per your local boiler codes, simply plug the two attached wires into the PC-Board terminals labeled "Reset".