MODEL PBD-100 PARALLEL BLADE DAMPER - NCA Manufacturing

MODEL PBD-100PARALLEL BLADE DAMPERPBD-100 - 03-05Standard Construction:Frame: 3-1/2" X 5/8" (88.9 mm x 15.9 mm) x 16 gauge rollformedgalvanized steel hat section with welded corners.Blades: 16 ga. rollformed galvanized steel on 6" (152.4 mm) centers.Bearings: Permanently lubricated oilite bronze,press fit into frame.Axles: 1/2” (12.7 mm) dia. plated steel.Linkage: Commercial grade, brass pivots, machineriveted to blade.Linkage Tie Rod: 1/4" (6.4 mm) dia. plated steel.Operator Shaft: 6" x 1/2" (152.4 mm x 12.7 mm) dia. plated steel.Finish: Mill galvanized.Minimum Damper Size: Single Blade: 6"w x 6"h (152.4 mm x 152.4 mm)Multi Blade: 6" x 12"h (152.4 mm x 304.8 mm)Maximum Damper Size: Single Section: 48"w x 72"h (1,219 mm x 1,828 mm)Multi Section: unlimitedOptions:Seals:Operators:Finish:Face & Bypass:Notes:Vinyl or stainless steel blade sealsFlexible stainless steel jamb sealsMotor mounting - factory furnished or by othersManual quadrant or chain operatorPainted finishesRight angle and straight line mixing dampers• All dampers are fabricated 1/4" (6.4 mm) under listed sizes unlessspecified "actual or exact".• Dampers must be installed square and free from racking.• Dampers with multiple sections in both width and height require structuralsupports (by others). NCA recommends that large openings be dividedwith structural members such that dampers will span either the widthor height of each opening between the structural members with a singlesection.• All dampers must be installed with blades running horizontally.• Connect all damper motors to linkage side of operator blade or tooperator shaft.• Consult factory if application involves static pressuresin excess of 2.5 inches w.g.6"(152.4 mm)3-1/2"(88.9 mm)11" min.(279.4 mm)clearanceMULLIONJAMBSpecifications are correct at time of printing. However, as part of our ‘continuous improvement program,’ we reserve the right to make further improvements without notice.© 1999 NCA ManufacturingProject:Location:Architect:Engineer:Contractor:Address:P.O. Number:Date:NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL PBD-100PARALLEL BLADE DAMPERPRESSURE DROP - INCHES OF WATER (In. W.C.)2.521.51.0 .9.8.7.6.5.4.3.25.2.15.1.09.08.07.06.05.04.03.025.02.015DAMPER SIZE 36 x 36DAMPER SIZE 24 x 24DAMPER SIZE 12 X 12© 1999 NCA ManufacturingPressure drop testing was conducted by an independent laboratory in accordance with the AMCA Standard 500-D, Fig. 5.3ductwork upstream & downstreamPRESSURE DROPPBD-100 - 03-05.01100 150 200 300 400 500 700 900 1500 2000 3000 4000 60001000VELOCITY THROUGH FACE AREAPressure (In. W.G.)54321PRESSURE LIMITATIONS00 12 24 36 48Section Width (In.)VELOCITY THROUGH FACE AREAPressure & VelocityLimitations presented inthe adjoining graphs areconservative in order toavoid mis-applications.Please contact factory forapplication guidance ifyour requirements exceedpublished limitations.Velocity (FPM)VELOCITY THROUGH FACE AREAVELOCITY LIMITATIONS300025002000150010000 12 24 36 48Section Width (In.)LEAKAGEDAMPER SIZE 36 x 4810987Leakage Performance test wasconducted by an independentlaboratory in accordance with AMCAStandard 500-D and is expressed asCFM/SQ. FT. of damper face area.Damper requires both blade edgeseals and jamb seals to achieveleakage performance depicted.STATIC PRESSURE65432.521.51.01 1.5 2 3 4 5 7 9 15 20 30 40 6010LEAKAGE IN CFM/SQ. FT.NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747