Standard Features:
  • 316L Stainless Steel on all Wetted Surfaces
  • 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.
  • UL Listed and labeled under UL 834
  • Dual Pressure Controls (UL 353)
  • High Pressure Safety Reset. (UL 353)
  • Low Level Cut-Off (LLCO)
  • 15 psi Safety Relief Valve (A.S.M.E. Section I - V-Stamp)

Recommended Options (Non-Standard)
  • Spare Parts Package
  • Single Service Transformer
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
Phase2 N/A 3


N/A 50 Hz60 Hz

Boiler Horse Power

N/A 24 bhp
Steam Capacity3 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

Note for Operating Pressure

N/A Factory Set at 11 psi

Maximum Boiler Capacity

N/A 26.5 gal

Boiler Fill Capacity

N/A 22.0 gal
Boiler Material 4 N/A 316L Stainless Steel

Cabinet Material

N/A 304 Stainless Steel

Plumbing Material

N/A 316L Stainless 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


N/A 30 in


N/A 37 in

Minimum Clearance

Total Length

N/A 120 in

Total Width

N/A 60 in

Total Height

N/A 45 in

Plumbing Connection Sizes

Water Inlet

N/A 1/2" National Pipe Thread (NPT) (Female) - Street Elbow, 316L Stainless Steel (SS)

Steam Outlet

N/A 1" National Pipe Thread (NPT) (Female) - Ball Valve, 316L Stainless Steel (SS)

Safety Valve

N/A 2" National Pipe Thread (NPT) (Female) - Safety Valve, 316L Stainless Steel (SS) Trim (Wetted Surfaces) , Brass Body


N/A 1" National Pipe Thread (NPT) (Female) - Ball Valve, 316L Stainless Steel (SS)


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

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.
Manual Low Water Reset5 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 Three Phase (3Ø) primary high voltage is standard, but steam generators with a power rating of 30 kW or lower are also available in Single Phase (1Ø) upon request.
  • 3 Calculations are based off of a 212 ºF boiler feed-water temperature. Boiler feed-water temperatures that range between 60 ºF and 140 ºF, are approximately 80% to 90% of the calculated values shown. Boiler feed-water must not exceed 140 ºF.
  • 4 Wetted Surfaces.
  • 5 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 remove the jumper wire from the back of the Reset Button.