Greenheck FPB-100F-M20 Direct Drive Pressure Blower

A compact radial blower for low-flow, high-pressure air

The Greenheck FPB-100F-M20 is the size 100 full-width model in the FPB pressure blower range. FPB blowers use a radial aluminum-blade wheel on a direct drive (AMCA arrangement 4) shaft inside a steel scroll that rotates to any discharge position. They are meant for clean air supply or exhaust where flow is modest but pressure is high, up to 10 in. wg (2.5 kPa) across the range.

This model has a 10-5/8 x 4 in. wheel, a 2 hp totally enclosed motor and delivers 1,196 cfm at free delivery with 2.12 bhp. The catalogue lists applications including cabinet or room pressurization, blow-off systems for moisture removal, combustion air for burners, parts cooling and fume exhaust.

Construction features

• Steel housing and frame with a baked polyester coating, black finish, 2 to 4 mils electrostatically applied.
• Aluminum wheel statically and dynamically balanced, blades riveted to aluminum inlet and backplates; spark-resistant construction.
• Totally rotatable steel scroll for all discharge positions in both clockwise and counterclockwise rotation.
• Motors specified to EPACT efficiency, NEMA T-frame, 3600 rpm two-pole, TEFC with a 1.15 service factor.
• Slip-fit outlet with optional punched flange; optional inlet and outlet flanges and guards.

Technical specification (FPB-100F-M20)

Performance at 3500 rpm

The partial-width version FPB-100H-M20 shares the size and motor but delivers less air (1,087 cfm free) at slightly lower power (1.80 bhp) and holds on to 482 cfm at 7 in. wg. Performance is for standard conditions of 0.075 lb/ft3 air density.

Selecting from the FPB family

Size, then H or F width, then motor code M5 to M100 (the number is hp times 10). Confirm the duty point on the pressure curve and the discharge position and rotation (CW or CCW) when you order.

Using the pressure curve for common duties

The F wheel gives roughly 10 percent more free-delivery air than the H wheel of the same size (1,196 against 1,087 cfm, derived), at the price of about 18 percent more power at free delivery (2.12 against 1.80 bhp, derived). Flow falls steeply with pressure: from 1,196 cfm at free delivery to 542 cfm at 7 in. wg, a drop of about 55 percent (derived). For combustion air or blow-off nozzles, read the delivered flow at the actual back-pressure rather than the free-air figure.

Installation and use

The FPB is for clean air; the catalogue offers no wetted, corrosive or particulate rating. Because the motor is directly coupled, there are no belts to service, but the 3500 rpm speed is fixed unless a compatible drive is fitted. Orient the scroll to the duct outlet by rotating the housing rather than adding elbows. Note that this catalogue is a 2008 revision, so check current dimensions and ratings with the supplier. Related items are in our HVAC and combustion category.

What to confirm before ordering

Confirm the required pressure and flow on the curve, the supply voltage and frequency (the data is for 60 Hz at 3500 rpm), the discharge position and rotation, and any inlet or outlet flanges or guards. The catalogue is a 2008 revision, so ask for current dimensions before final design.

Information to send with an RFQ for the Greenheck FPB-100F-M20 Direct Drive Pressure Blower

Fans are selected on the duty point, not on the model name. For the Greenheck FPB-100F-M20 Direct Drive Pressure Blower, give the required airflow, the static pressure the fan must overcome, the air temperature and density, and whether the fan supplies or exhausts air. Mention the motor supply voltage, phase and frequency; 415 V / 3 ph / 50 Hz is common on GCC sites.

• Installation position and the roof curb, wall opening or duct connection available.
• Accessories: dampers, guards, speed control or variable frequency drive, and vibration isolation.
• Sound limits for nearby offices or residential areas.
• Ambient conditions: high temperature, dust, sand or corrosive air near the coast.

With a duty point and these details, the fan size, wheel and motor can be confirmed from the manufacturer’s selection data before a quotation is issued.

Documents and supply information

The FPB catalogue attached to this page is Rev.1 of August 2008. Values are quoted as printed; current ratings should be confirmed before purchase. Availability is confirmed in the quotation.

Frequently asked questions

What is the maximum pressure of the FPB range? Up to 10 in. wg (2.5 kPa) across the series; this size 100 unit reaches 7 in. wg in the performance table.

What does the F in FPB-100F-M20 mean? Full width wheel; H marks the partial width wheel with modified performance.

What motor does it use? 2 hp, NEMA T-frame, 3600 rpm two-pole, totally enclosed fan cooled with a 1.15 service factor.

Can the discharge be rotated? Yes, the steel scroll is totally rotatable for all discharge positions and both rotations.

Is Seven Star LLC the manufacturer? No. Seven Star LLC is an independent supplier in Muscat; confirm model, motor voltage and discharge before ordering.