Fiberglass Fan Propellers

for Axial Flow Fans


Airfoil Propellers
for Corrosive Applications
by
Polymil Products
51 North Street
LeRoy, New York 14882
Phone 716 768 8170
Fax 716 768 7830


Advantages

High strength and corrosion resistance
in hostile environments

High efficiency

Flexibility

Low Noise

Customized Performance

Quick Delivery

Small quantity orders as well as OEM orders

Help with selection and usage


The Fiberglass Fan Prop system uses standard blades and hubs. This allows us to expedite delivery and keep costs down. Using a sophisticated computer application, these factors are combined as needed for a tailored response to your requirements. We also use a computer design program to calculate the Performance Rating Curves with varying numbers of blades, pitch settings, hub diameters, and speeds to help select the most efficient and economical solution to your needs.


Blades
All of the blades are "F Series"airfoil type. They are designed for high efficiency operation while maintaining superior corrosion resistant characteristics. Fiberglass mat is die cut and pattern layered for strength and consistency, then wet out with resin and press molded to achieve accurate parts. The resins are chosen for resistance to a wide variety of corrosive chemicals. Edges are smoothed to prevent premature erosion and loss of airfoil properties. This is most important when being used in severe applications such as pulp and paper, sewage and wastewater, plating and chemical industries, and others. Special resins and reinforcements can be used should temperature or corrosive conditions exist.

Hubs
Flat "PK" hubs are cast in one piece monolithic blocks of fiberglass and resin. They are machined and bored to receive the proper number of blades. They are offered with either a fixed bore of your choice (with or without a key way), or with a taper bore and studs to directly receive standard taper lock bushings. Large center bores are also available for expansion type bushings.

Air Flow "AF" hubs are similar to "PK" hubs but have a hollow airfoil cowl built around the solid core block that receive the blades. The same mounting possibilities apply. Molded fiberglass covers are supplied to protect the mounting arrangement. When taper or expansion bushings are used, a rear washer of fiberglass is supplied to seal against the shaft and the rear of the hub. Extended shaft protectors, used where shafts must be protected from the air stream and seals are required, are available.

Finish & Mountings
The propeller is finished with a corrosion, abrasion, and UV resistant gel coat. The propeller is then tested and balanced (by material removal).

Several methods of mounting shafts are available. Our preferred approach is to bore the hub to receive a standard Browning® Split Taper Bushing; using sizes "H" through "R1" shaft diameters from 3/8" to 3 3/4" can be accommodated. Stainless steel studs are installed in the hub for tightening the bushing. The studs are countersunk and filled on the backside to prevent corrosion. They extend through the thickness of the hub for strength.

Other mounting options are available, for example, fixed bores with or without keyways, expansion type bushings (we will bore your hub to fit your type).

To protect the bushing and hardware from the airstream a fiberglass cover, specific to your propeller, is provided along with sealant to fasten it in place.

A fiberglass washer, bored to the shaft size of your drive, is also furnished. This is to be installed on the opposite side of the bushing or fixture (with sealant provided) to protect the rear of the hardware.

Let us know if you need special mounting, shaft seals, shaft sleeves, and covers. Should you need advice or recommendations our technical staff stand ready.


Special Services
Consult our sales and technical people for:
Special Resins
Static Grounding Fillers
Use with Guide Vanes
Custom Designs
Attachment Devices
Density Corrections
Usage
OEM Prices



Requesting an Estimate


There are six different blade models; two hub types, AF - Air Flow which comes in comes in four sizes and PK - Flat which comes in seven sizes. Each hub can have the of minimum two blades to twenty, depending on hub size. This range of possible solutions is so large that displaying fan performance charts is beyond the scope of this web page.

To respond to your various needs we ask you to provide us with sufficent information about your requirements. With these as a starting point we will generate a fan blade description that meets your specifications. This includes a fan performance chart and an estimate of unit cost. The cost gives you an approximation that will be quite close to final cost unless the special use specifications or quantity of units ordered cause change. We sell directly to the users of our products.


Questions? Contact us at Polymil


Download or view the PolyProp Literature

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