Series 300 Steam LP

Series 300 Steam LP Overview: The Series 300 Steam Boiler is available with firing inputs from 300,000 Btu/hr to 375,000 Btu/hr. However, many millions of Btu’s can be delivered by creating an efficient, fully modular system of up to 24 vessels operated by our computerized control panel.

Design: The Series 300 Steam Boiler is manufactured to exceed ASME Section IV standards and typically is used to provide operating pressure of up to 15 psi with nominal operating temperature of 218°F to 240°F.

These vessels contain 37 vertical firetubes, each of which is 1½" diameter, each fitted with a high-efficiency turbulator for maximum heat transfer. The combustion chamber is fully water-backed, with burners that are UL listed.

This boiler qualifies as a Category I gas appliance with industry standard controls wired to NEC specifications.

Safety: A well-made, heavy vessel is naturally a safer boiler. But TRIAD Boilers also have a firebox design that is completely backed by water, along with extra safety controls on the boiler that results in a very safe and secure package.

Standard Features: The following standard features include nationally known parts and controls that are available at most supply houses, allowing for quick and easy repair and maintenance, which can dramatically reduce down time:

  • UL Listed Gas Trains and Control Systems.
  • Choice of Power Burners.
  • Main and Auxiliary Gas Valves
  • Air Flow Switch
  • Main Manual Leak Test Valve
  • Pressure Control
  • High-Limit With Manual Reset
  • 5801-30 lb Pressure Gauge
  • Siphon Loops
  • 15 lb Pressure Relief Valve
  • 150 Water Level Control
  • Automatic Low Water Cutoff
  • Gauge Glass Assembly
  • Honeywell Aquastat Relay
  • Burner Control Relay
  • High Visibility Operating Light
  • 1½" Diameter Firetubes of SA178-A Steel
  • Turbulators for Maximum Heat Transfer
  • Two Inches of Insulation With a Painted Steel Jacket.


Boiler Efficiencies:
Model Input
(BTU/Hr)		 Gross
OutPut		HP
Output		Combustion
Efficiency		 GPM @
Riseº F		Steam
Output
(lbs/hr)		Heating
Output
(sq. ft.)
GMS-300 300,000 258,0007.7HP86.0% N/A25934
GMS-375 375,000 321,7509.6HP85.8% N/A32434


Options: TRIAD offers several options to customize your boiler. A job is not complete until the boiler has been properly equipped for the application.

  • Choice of burner manufacturers fired by natural gas, oil, propane, or dual fuel.
  • Fan-Damper relays
  • Barometric Dampers and Galvanized Tees
  • Clean-out openings and plugs
  • Microprocessor Control Panel for true lead-lag modulation
  • Lifting Lugs
  • Rail Legs


Boiler Dimensions:
Feature Dimension
  Vessel Width 22"
  Vessel Height 57.5"
  Boiler Weight 800 lbs
  Boiler Depth w/ Burner 40"
  Gas Inlet Height 11"
  Return Water Inlet Height 7"
  Height Required at Installation 82"
  Clearance to Front of Boiler 48"
  Clearance to Side of Boiler 18"
  Clearance Between Boilers 3"
  Clearance of Steam Pipe to Vessel Top 24"