| MODEL VP - BELT DRIVE UTILITY SET
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Application
VENT-PAK fan wheels are the versatile, quiet, energy efficiency backward inclined and forward curved type. The BI and FC wheels make VENT-PAK utility sets the best selection for many industrial, commercial and institutional projects. Typical applications include hood exhaust, welding fume exhaust and flammable gas exhaust. Ventilation of theaters, restaurants, stores, hotels, kitchens, gymnasiums, laundry rooms, lavatories and locker rooms are other common applications for utility sets.
VENT-PAK fans by Breidert are available in 12 sizes with wheel diameters from 12-1/4” through 36-1/2’. Wheel diameters are readily recognized from the model number. For example VENTPAK 12 has a 12-1/4” diameter wheel and VENT-PAK 27 has a 27’ diameter wheel. VENT-PAK Class I fans deliver up to 26,000 cubic feet of air per minute (CFM) at static pressures (SP) up to 5” W.G. Class II fans deliver up to 33,000 CFM at SP up to 8” W.G.
For small or medium size general ventilation applications. VENT-PAK utility sets are the ideal choice. These easy to select, easy to install fans come prepackaged from the factory. Each self-contained unit includes the motor and adjustable drive as well as the fan assembly.
Any one VENT-PAK model can handle a wide range of air volume and pressure as shown in the performance tables on pages 4 through 12.
Construction
Housings feature airtight all welded construction with the inlet and drive stand reinforced with heavy-gauge side sheets. Inlet cones and inlet rings are standard on all VENTPAK utility sets. The fans are field rotatable to eight standard discharges. Motor compartments are designed for easy access and servicing and are heavily constructed and braced. Bearing supports are also rigid and heavily braced to provide a firm foundation for the shaft and bearings. Belt guards and weather covers are vented to reduce heat buildup.
Backward Inclined Wheels are designed for optimum performance for most operating conditions. Class I sizes 12 through 27 are constructed with riveted aluminum wheels. For operating temperatures over 250°F a welded steel frame is provided. Class I sizes 30 through 36. as well as Class II sizes are constructed with welded steel wheels. All wheels are statically and dynamically balanced at the factory after assembly.
Forward Curved Wheels are designed for most operating conditions. All FC fans are constructed with riveted steel wheels.
Shaft and Bearings are designed for long life. Breidert uses only the finest turned, ground and polished shafting. First critical shaft speeds are at least 1.43 times the maximum operating speed. VENT-PAK fans are equipped with pillow block bearings supplied by the most respected manufacturers. Nominal L10 bearing life is 40,000 hours, based on maximum class fan speed.
Motors and Drives are selected and mounted at the factory as parts on a packaged unit. Available motors include open drip-proof, totally enclosed, and explosion proof models. Open drip-proof and totally enclosed motors are also available in high efficiency models. Adjustable pitch drives are supplied on all VENT-PAK utility sets. All drives have a minimum 1.2 service factor. |
Accessories
Discharge Shutters: Gravity operated shutters open when the fan is running and close when the fan is not running. They shut out weather and backdrafts but do not control airflow. Motorized shutters for volume control are also available. Shutters are not suitable for down blast or angular down discharge positions and they are limited to a maximum of 200°F.
Vibration Mounts, Rails & Hangers: Vibration mounts, rails and hangers are available for all VENT-PAK fans. They are properly sized for each individual unit to assure maximum
vibration isolation and correct deflection.
Spark Resistant Construction: Types B and C spark resistant construction are offered in accordance with AMCA specifications. Type B includes an aluminum wheel and a rubbing plate in the fan housing though which the shaft passes. Type B is limited to a maximum air temperature of 250°. Type C fans use an aluminum wheel, aluminum inlet cone and rubbing plate.
Special Coatings: Breidert's standard paint is a tough, corrosion resistant enamel. For special requirements, please contact the factory.
Inlet and Discharge Screens: Screens are recommended whenever there is an open inlet or discharge. They protect personnel from injury and guard against foreign objects entering
the fan. Inlet screens are heavy-gauge wire. Discharge screens are galvanized hardware cloth.
Flanges: Inlet and discharge flanges are available on all models. Discharge flanges are not available on downblast or angular down discharges. Flanged inlets are prepunched. Flanged discharges are punched only when requested.
Access Doors: Two types of access doors are available: a bolted or quick-opening type. Access doors are specified where examination and cleaning of the fan interior is required.
Drains: Drains are available on all fans except those with bottom horizontal or down blast discharges. Drains are located at the lowest point of the scroll and feature I.P.S. coupling connections.
Belt Guards: Standard belt guards are of the open back style, and are readily removable for belt or pulley adjustments. For OSHA-style belt guards, see notes on weather cover.
Weather Covers: An easily removable weather cover is available for either Class I or Class II fans. The weather cover provides complete protection for the motor, fan bearings, and V-belt drive. If an OSHA-style belt guard is specified on vent sets, a weather cover will be supplied.
Shaft Seals: Shaft seals are available on all VENT-PAK fans, and standard on all fans with application temperatures over 300°F. The aluminum cover plate is bolted to the fan housing. A non-asbestos woven fiber material is sandwiched between the fan housings and aluminum cover plate. The shaft seal does not make the fan gas tight.
Variable Inlet Vanes: Variable inlet vanes provide economical, stable and efficient air volume control for manual or motorized operation. Low maintenance, easy assembly and disassembly, and long life are prime features of this vane design. Blades are supported by needle roller bearings riding on fatigue resistant steel shafts, hardened to minimize wear. Bearings
are lubricated for life with high grade moisture-resistant grease and protected with quality seals. The vane bearing housings are welded in position and stiffened with a welded support ring. The welded structure eliminates flutter and vibration while still utilizing the efficiency of a cantilevered design.
Two types of inlet vanes are offered, depending on fan size. Inlet vanes for sizes 12, 13, and 15 are external type, bolted to the fan inlet flange. Inlet vanes for sizes 16 and larger are supplied as nested type, with the inlet vane blades nested within the inlet cone and all linkages internal to the fan. |
