RM-1200 Slim Round Control Damper Product Bulletin Code No. LIT-12011358 Issued June 16, 2008 Since 1905, Johnson Controls has developed and refined air control products by providing the highest quality control dampers that fit your application and size requirements. Now we are including round industrial style dampers in our product offering. RM-1200 dampers are available in sizes up to 48 inches (122 cm) in diameter with galvanized steel, aluminum, or 304 stainless steel frames with no seals, neoprene seals, or silicone seals. The RM-1200 dampers feature the blade seals locked inside the blade. Figure 1: RM-1200 Slim Round Control Damper Table 1: Features and Benefits Features 3-Year Warranty on Materials and Workmanship 15 to 25 Working-Day Standard Shipping after Order Entry Benefits Provides confidence in company-backed product. Results in fast response for short lead time projects. RM-1200 Slim Round Control Damper Product Bulletin 1
Applications RM-1200 heavy duty dampers are designed for airflow modulation and shutoff in industrial applications. These dampers are equipped with blade seals for low leakage applications. Sample Specification Furnish and install, at locations shown on plans or in accordance with schedules, dampers meeting the following specifications. Dampers shall be of the butterfly type consisting of circular blade mounted to a shaft. Inside frame surface shall be clean and smooth with no blade stops or similar inward projections. Frames shall include rolled stiffener beads to allow easy sealing of spiral ductwork joints. Dampers shall include a firm, fine cell foam seal sandwiched between two blades. Leakage through the damper in the closed position shall not exceed 0.15 standard cubic feet per minute (scfm) (0.07 lps) per inch (2.54 cm) of blade circumference at a pressure differential of 4 in. w.g. (0.99 kpa). Leakage through the bearings shall be less than 1/4 in. cfm (0.3 cm lps) at 4 in. w.g. (0.99 kpa) static pressure. Damper frame and blade shall be fabricated from galvanized steel. Units furnished approximately 1/8 in. (3 mm) smaller than diameter dimensions. Construction and Dimensions See Figure 2 and Table 2 for information on construction and dimensions. Flange Inside Diameter Web Blade Thickness FIG:RM1000_dim Axle Diameter 6 in. (152 mm) Table 2: Construction Part Materials Frame Under 6 in. (152 mm) diameter 2 in. x 12 ga. (5 cm x 2.7 mm) 6 to 12 in. (152 to 305 mm) diameter 2 in. x 1/2 in. x 14 ga. (5 cm x 1.3 cm x 1.8 mm) 12 to 24 in. (305 to 610 mm) diameter 2 x 1/2 x 1/8 in. (5 cm x 1.3 cm x 0.3 cm) 34 to 40 in. (610 to 1,016 mm) diameter 2 x 1 x 3/16 in. (5 cm x 2.5 cm x 0.5 cm) 40 to 48 in. (1,016 to 1,219 mm) diameter 2-1/2 x 1-1/2 x 1/4 in. (6.4 cm x 3.8 cm x 0.6 cm) Blade, without Seals Blade, with Seals Axle Bearings Finish Minimum Size Maximum Size Maximum Temperature Under 18 in. diameter damper 12 gauge (2.7 mm) steel Over 18 in. diameter damper 10 gauge (3.4 mm) steel Under 40 in. diameter damper 2 pieces of 18 gauge (1.2 mm) steel Over 40 in. diameter damper 10 gauge (3.4 mm) steel with retaining ring All axles extend 6 in. (152 mm) beyond frame Under 24 in. diameter damper 1/2 in. (12.7 mm) plated steel 24 through 40 in. diameter damper 3/4 in. (19 mm) diameter plated steel 40 to 48 in. diameter damper 1 in. (25.4 mm) plated steel Stainless steel bearings pressed into frame. Aluminum paint 4 in. (10.2 cm) Diameter 48 in. (122 cm) Diameter 250ºF (121ºC) 1 1. Dampers can be constructed for 250 to 400ºF (121 to 204ºC) temperature conditions by increasing clearance between blade and frame and by using a different bearing arrangement. Advise Johnson Controls of desired maximum operating temperature. 2 in. (51 mm) Figure 2: Damper Dimensions 2 RM-1200 Slim Round Control Damper Product Bulletin
Ordering Information Use Table 3 to construct the part number for the desired model. Table 3: RM-1200 Dampers Code Number/Character FIELD 1 2 3 4 5 6 Product Family R = Round Dampers R M G d d X Application M = Slim line Galvanized 1 Shroud Type A = Aluminum G = Galvanized Steel S = Stainless Steel dd = Diameter 04 in. through 48 in. in increments of 1 in. Actuator M = Manual Locking Quadrant N = None 1. Under 6 in. (152 mm) diameter: 2 in. x 12 ga. (5 cm x 2.7 mm), 6 to 12 in. (152 to 305 mm) diameter: 2 in. x 1/2 in. x 14 ga. (5 cm x 1.3 cm x 1.8 mm) 12 to 24 in. (305 to 610 mm) diameter: 2 x 1/2 x 1/8 in. (5 cm x 1.3 cm x 0.3 cm) 34 to 40 in. (610 to 1,016 mm) diameter: 2 x 1 x 3/16 in. (5 cm x 2.5 cm x 0.5 cm) 40 to 48 in. (1,016 to 1,219 mm) diameter: 2-1/2 x 1-1/2 x 1/4 in. (6.4 cm x 3.8 cm x 0.6 cm) Performance Data To determine damper leakage, enter Figure 3 from the top side. Given the static pressure the damper encounters in closed position, move vertically over diagonal line, then move left to cfm of leakage per inch of perimeter. Example: Damper operating at 1.5 in. w.g. (0.37 kpa) static pressure leaks.09 cfm per inch of perimeter (.11 lps per cm of perimeter). Total leakage on an 8 in. (20.3 cm) round is 8 x 3.14 x.09 CFM per inch perimeter = 2.26 cfm (20.3 cm x 3.14 x.11 lps per cm = 7.59 lps) leakage. Note: Ratings are based on AMCA Standard 500 using Test Set-up Apparatus Figure 5.3 (damper installed with duct upstream and downstream). Note: Static pressure and cfm (lps) are corrected to.075 lb/cubic ft (1.2 kg/cubic meter). CFM PER INCH OF PERIMETER.2.1.08.07.05.04.03 FIG: lkg_chrt.02.1.2.3.4.5.6.7.8.9 1 2 3 4 STATIC PRESSURE IN INCHES W.G. Figure 3: Damper Leakage Chart RM-1200 Slim Round Control Damper Product Bulletin 3
To determine static pressure drop through an open damper, enter Figure 4 from the left side. Given the cfm of airflow through the damper, follow the cfm line to the diagonal line with the damper size required, then down to the static pressure drop of the unit. Example: The pressure drop of an 8 in. (20.3 cm) damper with 700 cfm (330 lps) flow is.06 inches w.g. (.015 kpa). Table 4: Static Pressure, in. w.g. (kpa) Damper Diameter, in. (cm) 4 (10.2) 36 (4.07) 5 (12.7) 40 (4.52) 6 (15.2) 44 (4.97) 7 (17.8) 48 (5.42) 8 (20.3) 52 (5.88) 9 (22.9) 56 (6.33) 10 (25.4) 60 (6.78) 12 (30.5) 68 (7.69) 14 (35.6) 76 (8.59) 16 (40.6) 84 (9.49) 18 (45.7) 92 (10.39) 20 (50.8) 100 (11.30) 22 (55.9) 108 (12.20) 24 (61) 116 (13.11) Minimum Inch-Pounds (Newton Meter) Torque at 2 in. w.g. (0.5 kpa) or Less Static Pressure 4 RM-1200 Slim Round Control Damper Product Bulletin
AIR FLOW IN C.F.M. FIG: RM1200_prss_drp 20 in. 24 in. 12 in. 8 in. Diameter 16 in. Agency Compliance Dampers are tested at an AMCA Certified Laboratory using instrumentation and procedures in accordance with AMCA Standard No. 500, Test Methods for Louvers, Dampers, and Shutters. STATIC PRESSURE IN INCHES W.G. Figure 4: Static Pressure Drop Building Efficiency 507 E. Michigan Street, Milwaukee, WI 53202 Metasys and Johnson Controls are registered trademarks of Johnson Controls, Inc. All other marks herein are the marks of their respective owners. 2008 Johnson Controls, Inc. RM-1200 Slim Round Control Damper Product Bulletin 5 Published in U.S.A. www.johnsoncontrols.com