Jalousie damper lindab | dampers and measure units JSM Dimensions A C D D L D B 50 100 D α Description JSM is a manually operated jalousie damper for the closing off or regulation of ventilation systems. The damper is built on a frame made from galvanized steel sheet. The damper blades are made from smooth, extruded aluminium profiles with silicon sealing strips on one side, and on the other the side grips to a rubber seal when the damper is closed. The damper blades are in the end sealed with a gasket made from synthetic material. On the outside of the frame, the damper blades are individu- ally fitted with fine-tooth ratchets, which ensure a very low torque. Axle shaft 15 x 15 mm is mounted directly to the external ratchet. The external ratchet is supplied with a face plate. The frame can be made using stainless steel, depending on preference. Temperature range from -20°C to +80°C. JSM is supplied with an RJFP 20 connection system as standard. For alternative connection systems, please see table. α Opening angle C Manual regulation: D LS-rail: RJFP-20 flanges: RJFP-30 flanges: RJFP-40 flanges: L LS-rail: RJFP-20: flanges: RJFP-30: flanges: RJFP-40: flanges: 80 mm 20 mm 20 mm 30 mm 40 mm 115 mm 150 mm 170 mm 170 mm Design advice • Select damper size based on air velocity and pressure exposure for when the damper is closed. • Remember the connection type - LS rail or RJFP flanges. • Remember the necessary accessories for operation. • Remember to leave space for unimpeded damper oper- ation at duct crossings for dampers. • Remember damper blades, horizontal installation. Ordering example Product A in mm B in mm Joint system JSM 500 500 RJFP 20 Lindab reserves the right to make changes without prior notice 1 2018-03-06
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