Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation
Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation

Marshall B Series Packaged Boilers

The Marshall B series is a high-efficiency, truly packaged, three-pass wet back boiler designed to deliver the driest steam instantly while occupying the minimum amount of floor space. Manufactured with submerged arc fabrication technology to ISO 9001 and IBR standards, this boiler eliminates the need for site-level electrical cabling, insulation, and heavy civil work. It arrives pre-wired and skid-mounted, making it a true “plug-and-play” solution for process plants requiring reliable, low-maintenance steam generation.

Key Technical Specifications:

  • Steam Generation Capacity: 1,000 to 5,000 kg/hr (Approx. 2,200 to 11,000 lb/hr).
  • Standard Working Pressure: 10.5 to 17.5 kg/cm²(g) (Approx. 150 to 250 psi).
  • Compatible Fuels: High-speed diesel (HSD), light diesel oil (LDO), furnace oil, natural gas, and LPG.
  • Guaranteed Efficiency: 89% with no tolerance on NCV basis.
  • Burner Turndown: 1:3 to 1:4.
  • Feedwater Pump: Vertical multi-stage stainless steel centrifugal pump.

Related Energy Conservation Tips for Boilers:

  • Truly Packaged Construction: Arrives skid-mounted, pre-wired, and pre-insulated with factory-fitted cladding.
  • Specially Developed Monobloc Burner: Integrating the boiler and burner from the same design source for an optimal flame configuration.
  • Premium Mountings: Comes standard with zero-leak piston valves for steam/water lines and spring-loaded disc check valves for feedwater discharge.
  • Twin Water Level Controllers: Equipped with 2 Mobrey level controllers for redundant safety.
  • Hinge-Mounted Doors: Front doors are hinge-mounted, and rear doors are lift-off style.

Variants

Marshall B Standard

A compact, 1-5 TPH fully packaged oil/gas boiler requiring no site foundation.

Marshall B Modular

A complete “boiler house on a skid,” integrating the boiler, feedwater tank, and day oil tank to reduce erection time by 80%.

Frequently Asked Questions

Which fuels Marshall B boilers run on?

High speed diesel / light diesel oil / furnace oil / natural gas / LPG

Do I need to build a foundation for the Marshall B boiler?

No. The Marshall B boiler is skid-mounted and requires no heavy civil foundation. A simple Plain Cement Concrete (PCC) platform is sufficient for installation.

Is site cabling or insulation required upon delivery?

No. It is a “plug and play” system that comes factory-insulated, cladded, and completely pre-wired from the control panel to the boiler-mounted instruments.

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