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> Qep 40 airfoil centrifugal plenum fan #3 $9746.95
Qep 40 airfoil centrifugal plenum fan #3 $9746.95
Surplus overstock item. Greenheck Co.
QEP plenum fans are designed and engineered for superior performance and reliability. Quiet and efficient operation is achieved through a 12-bladed, airfoil wheel. This design saves energy and improves the overall sound quality by reducing low frequency tones that are difficult to attenuate. The QEP is available in both belt and direct drive and offers numerous accessories to complement your project.
Greenheck s 12-bladed Quiet, Efficient Plenum model QEP will benefit your project by reducing electrical requirements and reducing the sound levels.
http:// /media/pdf/catalogs/QEMQEP_catalog.pdf
Quiet Efficient Plenum, Belt Drive Centrifugal Fan, Model QEP Arrangement 3
Facility Services Subgroup: Division 23 (Previously Division 15)
Quiet Efficient Plenum, Belt Drive, Centrifugal Fan, Model QEP
All sections, drawing plans, specifications and contract documents.
ANSI/AMCA Standard 204-96, "Balance Quality and Vibration Levels for Fans"
ANSI/AMCA Standard 210-99, "Laboratory Methods of Testing Fans for Aerodynamic Performance Rating"
AMCA Publication 211-05, "Certified Ratings Programme Product Rating Manual for Fan Air Performance"
AMCA Standard 300-96, "Reverberant Room Method for Sound Testing of Fans"
AMCA Publication 311-05, "Certified Ratings Programme Product Rating Manual For Fan Sound Performance"
AMBA - Method of Evaluating Load Ratings of Bearings ANSI-11 (r1999).
OSHA guideline 1910.212 General requirements for Machine Guarding. (www.osha.gov)
OSHA guideline 1926.300 General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)
OSHA guideline 1910.219 General requirements for guarding safe use of mechanical power transmission apparatus. (www.osha.gov)
Fans with Sure Aire Flow Monitoring selected shall include the following.
1. Flow monitoring station shall monitor the pressure difference between the fan inlet and the smallest diameter of the inlet cone.
2. Volumetric flow to be calculated from empirically derived formulas based on testing by the fan manufacturer.
3. Flow monitoring station shall not use air restricting probes that reduce fan performance or create additional fan sound.
4. Four (4) equidistantly spaced sensor orifices to be drilled in the smallest diameter of the inlet cone venturi. Flow tubes from each venturi sensor to extend to a termination plate mounted on the fan housing.
5. High-pressure flow probe(s) to be mounted in low velocity fan inlet. Flow probes from the high-pressure sensor shall extend to a termination plate mounted on the fan housing.
6. Termination plate shall include a low-pressure connection, a high-pressure connection and a listing of the empirically determined flow rate coefficient.
7. Flow monitoring station shall accurately measure the pressure differential to within +/- 3%.
8. Flow monitoring station shall be installed by the fan manufacturer as part of the standard fan assembly.
9. Flow monitoring station shall be supplied with electronics package that includes pressure transmitter and LCD digital readout.
A. Provide dimensional drawings and product data on each fan.
B. Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted.
C. Provide both inlet and outlet sound power readings for the eight octave bands.
D. Strictly adhere to QUALITY ASSURANCE requirements as stated in section 1.5 of this specification
Delivery: Deliver materials to site in manufacturer s original, unopened containers and packaging, with labels clearly indicating manufacturer, material, products included and location of installation.
Storage: Store materials in a dry area indoor, protected from damage and in accordance with manufacturer s instructions.
A. Base fan performance at standard conditions (density 0.075 lb/ft3).
B. Fans selected shall be capable of accommodating static pressure and flow variations of +/-15% of scheduled values.
C. Each fan shall be belt drive in AMCA arrangement 1 or 3 according to drawings.
D. Fans are to be equipped with lifting points.
E. After fabrication all carbon steel components shall be cleaned and chemically treated by a phosphatizing process to insure proper removal of grease, oil, scale, etc. Fan shall then be coated with a minimum of 2-4 mils of Permatector (Polyester Urethane), electrostatically applied and baked. Finish color shall be gray. Coating must exceed 1,000-hour salt spray under ASTM B117 test method. No uncoated steel fan parts will be allowed.
Plenum fans shall be of the unhoused belt drive centrifugal type.
Fan plate shall be aerodynamically designed with high-efficiency inlet, engineered to reduce incoming air turbulence.
Panels and framework shall be constructed of heavy gauge, precision laser cut and die formed ASTM A-569 low carbon steel to provide a rigid structure to support the shaft and bearings and reduce low frequency vibration.
Fan base angles shall be recessed to reduce overall width of the assembly.
After fabrication all carbon steel components shall be cleaned and chemically treated by a phosphatizing process to insure proper removal of grease, oil, scale, etc. Panels and framework shall be coated with a minimum of 2-4 mils of Permatector (Polyester Urethane), electrostatically applied and baked. Finish color shall be gray. Coating must exceed 1,000-hour salt spray under ASTM B117 test method. No uncoated steel fan parts will be allowed.
An OSHA compliant belt guard shall be included to completely cover the sheaves and belt(s).
The fan wheel shall be non-overloading airfoil centrifugal type. Wheels shall be statically and dynamically balanced to grade G6.3 per ANSI S2.19.
The fan wheel shall be manufactured with a minimum of 12 continuously welded aluminum airfoil blades to move the blade pass frequency into the mid octave bands.
The entire wheel shall be constructed of aluminum to reduce the rotational weight of the wheel and vibration. Fan sizes through 49 shall use 6063-T5 extruded aluminum blades, fan sizes greater than 49 shall use 5052-H32 laser cut and die formed aluminum blades to ensure precision blade tolerances, improve efficiency and reduce vibration.
Wheel hubs shall be cast of 319 aluminum alloy.
Aluminum fan wheels shall not require finish coating.
The wheel and fan inlet shall be carefully matched and shall have precise running tolerances for maximum performance and operating efficiency.
Motors shall meet or exceed EPACT (Energy Policy ACT) efficiencies. Motors shall be NEMA T-frame, 1800 or 3600 RPM in 60 Hz (1500 or 3000 RPM in 50 Hz), Open Drip Proof (ODP) or Totally Enclosed Fan Cooled (TEFC) with a 1.15 service factor.
Drive belts and sheaves shall be sized for 150% of the fan operating brake horsepower, and shall be readily and easily accessible for service, if required.
Fan shafts shall be turned, precision ground and polished steel (AISI 1018 steel through 2-inch diameter and AISI 1045 steel for greater than 2-inch diameter) so the first critical speed is 200% over the maximum fan operating speed.
Structural steel bases shall be designed and manufactured by the fan supplier to ensure proper alignment of the fan motor and structural integrity of the base to prevent vibration.
Bearings shall be selected for a basic rating fatigue life (L-10) of 80,000 hours at maximum operating speed for each pressure class {Average Life or (L-50) of 400,000 hours}.
Bearings shall be fixed to the fan shaft using concentric mount locking collars, which reduce vibration, increase service life, and improve serviceability. Bearings that use set screws shall not be allowed.
Bearings shall have zerk fittings to allow for lubrication.
Examine areas to receive fans. Notify the Engineer of conditions that would adversely affect installation or subsequent utilization and maintenance of fans. Do not proceed with installation until unsatisfactory conditions are corrected.
A. Install fans systems as indicated on the contract drawings.
B. Install fans in accordance with manufacturer instructions.
PART 4 ACCEPTABLE MANUFACTURERS
Greenheck Fan Corporation, PO Box 410, Schofield WI 54476-0410, , Quiet Efficient Plenum, Belt Drive Centrifugal Fan, Model QEP.
