We customize each blower to our clients’ process parameters and excel at finding solutions for complex applications. Our blowers are most often used for heavy duty and/or special purpose industrial applications in the chemical, petrochemical and fertilizer industries but are also used in the waste-to-energy, cement, steel, food and other process industries.

Boldrocchi's blowers
  • Flow rates up to 500,000 m3/hr (294,290 ft3/min)
  • Installed power up to 5 MW (6,500 hp)
  • Tip speeds over 280 m/sec (920 fps)
  • Hot-gas circulating fans up to 650°C (1200°F) – max. 850°C (1560°F)
  • Special blades design
  • Single, double or multi-stage blowers: ≤ 4 MW  (5,360 hp) of installed power, pressure rise ≤ 900 mbar (13 psi)
  • Special blowers have been made with heads up to 65 KPa and ≥ 1,000 KW power
  • Suitable for any gas, even:
    • Corrosive and lethal service
    • High temperature
  • ISO 9001
  • API 672, API 617, API 673
  • Welding: ASME, AWS, EN norms
  • Two manufacturing technologies available:
    • Fabricated steel construction
    • Forged/milled construction
  • Variety of materials:
    • High yield carbon steel
    • Low alloy steel
    • Stainless steel
    • Duplex and super duplex steel
    • Superalloys: Inconel®, Hastelloy®
    • Titanium
    • Aluminum
  • AMCA 210, ASME PTC10 performance test room
  • Full speed mechanical running tests with up to 7MW (9000 hp) motor
  • Permanent power supply: 11 / 6 / 4 / 3.3 / 0.69 / 0.4 kV
  • System pressure: 0.2 to 15 bar.A (3 to 220 psi.A)
  • Hot gas test duct setup

Our goal? Continue to have more expertise than anyone else in the market.

Industries & Applications

Oil & Gas
Power Generation

Other Process Industries

Industries & Applications

Oil & Gas
Power Generation
Other Process Industries

Fans, Blowers & Compressors Case Studies


Engineering Fan Systems for a Hydrogen Reformer at a Photovoltaic Power Plant in Bulgaria

Boldrocchi was hired to provide the fan systems for a hydrogen reformer at a photovoltaic power plant (PPP) near Burgas, Bulgaria. Boldrocchi designed, manufactured and tested the combustion air and flue gas fan and its system for this project. It involved a 700 kW induced draft fan and the fan machinery train. What was most interesting about this project was its special construction on spring isolators. The entire system had to be designed to be mounted on top of the reformer’s steel structure.


Revamping a Fan in Mexico: Performance Up, Costs Down

In 2016, Boldrocchi was awarded a contract to revamp a kiln fan at a cement plant in Tepetzingo. Plant officials were looking for a major performance increase but had a limited budget. Our kiln fan revamp increased the fan’s performance by 40% while saving 30% in costs. To further reduce costs, we designed a partial casing replacement to allow the client to keep most of the existing casing.

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Star Izmir

Boldrocchi Builds Special Test Facility for Turkish Order of Multiple Blowers

Boldrocchi engineered and manufactured a number of systems for a refinery in Izmir, Turkey. Among the systems: a CCR Chlorination Blower used in petrochemical chlorination and catalyst regeneration processes.

In order to satisfy the process requirements, Boldrocchi built a special test facility to check the blower’s performance at various temperatures, up to 600°C (1112°F). Boldrocchi also designed and fabricated a cooler blower, a combustion air blower, a recycle gas blower, a fines removal system and a regeneration blower.