Power Mizer® Cast Centrifugal Blowers
The air handling components of these blowers were designed in the Spencer Development Laboratory. By avoiding abrupt velocity changes that create turbulence and waste energy, our engineers achieved smoother, more energy-efficient airflow from blower inlet to discharge.
In industries around the world, Spencer Power Mizer® multistage cast centrifugal blowers provide high efficiency air delivery in heavy-duty process applications such as:
- Desulfurization processes
- Wastewater aeration
- Air knives
- Hazardous vapor control
- Soil remediation
- Fluidized beds
- Central vacuum systems
- Felt dewatering
- Landfill gas boosting
- Combustion air delivery
Unique setup of Power Mizer blowers in series, driven by a single motor, delivers air for a high altitude test rig for automotive engines
In another prime area of usage, water and wastewater treatment, Power Mizer blowers serve demanding and non-stop applications such as:
- Wastewater aeration
- Sewage aeration
- Odor control
- Grit chamber aeration
- Channel aeration
- Filter backwash
The rotor assembly of Power Mizer blowers in Series 4000 and larger contains cast aluminum impellers. Their three-dimensional blades transfer energy to the airstream with very high efficiency. Blade configurations include radial, backswept and combinations of both, selected by Spencer engineers using specialized computer software.
(assuming savings of 38 HP for one blower).
38 HP x .746 = 28.348 kW saved.
28.348 x 24 hours x 365 days (continuous annual operation) = 248,328 kWH per year.
248,328 x $.10/kWH (local utility cost) = $24,832 annual savings.
Motor efficiency of 95% yields an actual savings of $26,139 on an annual basis.
- Seven Power Mizer series, each of which can be designed with different types and numbers of impellers to meet precise airflow requirements. Get more product information in Technical Data Sheets (please note these are all PDF files).
Series 2500, 3500, 4000, 5000, 6000, 7000 and 8000
- Pressure to 28 PSIG; volume to 35,000 ICFM; power to 3700 BHP.
- Choice of oil or grease lubrication in Series 2500 and 3500; all others oil-lubricated.
Working under difficult, dirty conditions inside paper mills, Spencer Power Mizer Series 6000 blowers are helping turn a waste product into a valuable papermaking ingredient. Our OEM customer builds processing plants within paper mills around the world. The blowers handle flue gas in a process that converts mill byproducts into calcium carbonate for paper whitening in place of hazardous chlorine.
To survive the unusually difficult environment, our blowers have special coatings, shaft seals, bearing seals and flushing provisions devised by Spencer’s R&D Department. The blowers are going into new systems and also replacing installed competitive blowers because they are more reliable and efficient, providing long-term cost savings.
For a municipal landfill gas handling application involving a highly corrosive and combustible “witches’ brew” of methane, carbon dioxide, oxygen, nitrogen and water vapor, Spencer engineered and supplied three Power Mizer Series 7000 blowers powered by 300-horsepower, 4160-volt motors. They have Heresite® coatings on major internal parts for corrosion resistance, a 3/8" corrosion allowance (extra-thick housing walls), a highly unusual 304 stainless steel blower shaft and two belly wraps for quiet operation. The challenges in this case were so extreme, some of these provisions evolved during an extended period of experimentation and testing.
In the face of heavy international competition, Spencer won a highly coveted municipal wastewater treatment contract to serve a city of 4.5 million people in China. Power Mizer Series 7000 blowers were furnished along with electrical controls and mechanical accessories. The system provides 40,000 cfm of air to the biological treatment process in 36 aeration basins through a network of fine bubble diffusers.
Power Mizer Accessories
- Standard and custom electrical control panels including UL and CUL Listed controls
- Blower and motor protective devices
- Valves and silencers
- Gauges and instruments
- Acoustical Belly Wrap™
Tubing and fittings of steel, stainless steel, galvanized steel and aluminum
Alternate drives - steam turbine, belt drive, VFD
- Dissolved oxygen (DO) control systems including PLCs programmed with Spencer’s unique direct airflow control logic
- Variable frequency drives with automated speed adjustment in response to DO changes
Motor control centers
Blower protection panels
Activated sludge diffusion systems
Aeration control system engineering