Slant Type/VC Series Boiler

Heat Recovery Steam Generators

  • Gas Turbine Size: 3 MW - 25 MW
  • Type: HRSG
  • Exhaust Gas Flows (lb/hr): Up to 400,000
  • Steam Flows (lb/hr): Up to 150,000
  • Steam Temperature: Up to 1,050 deg F
  • Duct Firing Temperature: Up to 1,700 deg F
  • Assembly: Shop Assembled
  • Circulation: Natural Circulation
  • Construction: Stainless Steel Floating Inner Liner and Hard Outer Casing
  • Gas Flows to 400,000 lbs/hr
  • Steam generation from 10,000 to 150,000 lb/hr
  • Design pressure up to 2,300 psig
  • Steam temperature to 1,050 °F
  • Supplemental firing with stack emissions available to less than 2 ppm NOx with SCR


The Slant and VC Series boilers are ideal for applications where the gas side inlet temperature is less than 1,700°F. With a single-pass design, this series allows the boiler system to be optimized to fit in a variety of space limitations. Similar to the Maxfire®, This series is also suitable for applications where SCR or CO catalyst must be incorporated to meet today’s stringent environmental permitting requirements.


The Cleaver-Brooks HRSG achieves >80% efficiency compared to 56% for traditional technologies. It reduces up to 7.0 MMBtu/hr of fuel in conventional boilers and eliminates 2,870 tons of CO2 emissions annually per 1 MWe GT output.


  • Product Overview
  • Related Resources
  • Applications
  • Cold casing design with floating inner liners.
  • Multiple gas flow options conform to space restrictions and minimize installation cost.
  • Unheated downcomers, completely external to the boiler casing.
  • Single-pass design for lower gas-side pressure drop.
  • Ease of access to tubes for inspection and maintenance .
  • Accommodation for selective catalytic reduction (SCR) and CO catalyst.


The Slant model offers an integral steam and water (mud) drum positioned diagonally which maximizes the amount of heating surface for a given shipping profile creating a compact design for efficient heat recovery. The VC model is a drum-over-drum design well suited for higher steam pressure applications, integrated CO/SCR (selective catalytic reduction) systems, and horizontal exhaust flow arrangements.


Design Considerations for Small Scale HRSGs →


Morristown Medical Installs HRSG 

Morristown Medical Center wanted to improve its power resiliency, as well as reduce carbon emissions and increase steam production efficiency.

BYU Replaces Coal-Fired Boilers →

BYU replaced coal boilers with two O-type watertube boilers, a CBEX Elite firetube boiler and a HRSG, and pursued independence from local electrical grid.

Ethanol Plant Increases Efficiency and Reduces Fuel Costs →

The increased efficiency in the HRSG allows this plant to reduce energy costs.


CHP 101 – Basics of Combined Heat and Power →

Design Trends in Cogeneration →

Heat Recovery Steam Generator Animated Video →

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