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HSI-Electric

Hydro Steam Industries “ The Industry Standard - Electric Resistance Element Type Boilers (STR & HWR)  208V thought 600V, Steam up to 1635 psig and 9000 pph, Hot Water up to 415 psig and 4400 KW, Thermal Fluids up to 1200Ëš F and 2000 psig. High Voltage Electrode Type Boilers 4160V, 6.9KV and 13.2KV, Low and High Pressure Steam from 10,000 pph to 113,000 pph, no load to full load in 30 seconds.

Hydro Steam Industries

HSI Electric ®HSI Electric Bolier

  • Resistance Type (208 – 600 V)
  • Steam (up to 2500 psig and 4320 KW /14,700 lbs/hr)
  • Hot Water (up to 415 psig and 4320 kW)
  • Thermal Fluid Heaters & Steam Super Heaters (up to 1200° F and 2000 psig)
  • Electrode Steam Boilers 3000-34,000KW/ 10,000-113,000PPH/ 100-500PSI
  • Electrode Hot Water Boilers 3000-34,000KW/ 10,000-113,000MBH

HSI ‘Resisto-Flo’ Hot Water Boilers are designed to provide fast,efficient and economical hot water for heating through the use of electric resistance elements. The boiler controls automatically energize/de-energize steps of elements to maintain the desired water temperature. All HSI Hot Water Boilers utilize ASME pressure vessels (Section IV up to 160 psi; Section VIII above 160 psi) and all electrical components are UL listed and are wired in accordance with the current National Electrical Code requirements.

Each boiler is insulated with 3-1/2″ fiberglass secured to the vessel, and is housed in an enameled heavy-gauge sheet metal cabinet mounted on a full-size structural steel base. All HSI ‘Resisto-Flo’ boilers utilize 70 wpsi Incoloy-sheathed elements configured in conservatively-sized circuits to allow for overvoltage conditions as great as 10% without adversely affecting the integrity of circuit components.


HSI BBJ Electrode®HSI BBJ Bolier

  • Electrode Steam Boilers 3000-34,000KW/ 10,000-113,000PPH/ 100-500PSI
  • Electrode Hot Water Boilers 3000-34,000KW/ 10,000-113,000MBH

Water from the lower part of the boiler shell is pumped by the internal circulation pump (3) to the nozzle header (19) and flows by gravity through the jets to strike the electrode (18), thus creating a path for the electrical current. As the unevaporated portion of the water flows from electrode (18) to the counter electrode (20), a second path for current is created. Primary voltage connections are made directly to the electrode terminals (12), often eliminating the need for a step-down transformer. At max rated conductivity, approximately 3% of the flowing water is evaporated.

Regulation of the boiler output is accomplished by varying the circulating pump (3) speed, which regulates the amount of water reaching the nozzle header. The pump speed is controlled by the boiler pressure and load control system via a VFD, either to hold the steam pressure constant or to stay within an adjustable KW limit.

Regulation is stepless between no-load and full-load, so that the boiler output is finitely responsive to demand variation. No load to full load regulation can be accomplished in as little as 5 seconds, although normally this is stretched out to 20-30 seconds.