Fire damper Dimensions Lp 280 lindab | fire dampers WH25 Lp a Ød 1 cb s Description Circular fire damper for air duct system that penetrate fire resistance walls or floors. With 25 mm thick closing blade made from refractory material. Casing leakage performance class C according to Standard EN1751:2014 section C.3. The damper prevents fire and smoke from spreading through the air duct system. Tested and classified in accordance with EN 1366-2 and EN 13501-3 with 500 Pa negative pressure and CE marked in accordance with EN 15650. Product code Type WH Series 25 Manual command Command B type M Position S0 indication microswitches S2 M0 Magnet MR Motorized Motor type Dimension MI VSS DSS VSB DSB TSB XYZ Circular fire damper Blade thickness 25 mm Manual command Manual command with magnet Without position microswitches With two position microswitches (included for MR/MI versions) Without magnet (only for command type “B” and “C”) With power supply interruption magnet through eletric board 24 V DC or 48 V DC With power supply input magnet through eletric board 24 V DC or 48 V DC Siemens motor GRA 126 (24V) Siemens motor GRA 326 (230V) Belimo motor BFL24T (24V) Belimo motor BFL230T (230V) Belimo motor BFL24T-ST (24V) Nominal diameter (mm) Ød 1 nom WH25 s Lp mm mm 100 - 35 125 - 35 140 - 35 150 - 35 160 - 35 180 - 35 200 - 35 224 4 35 250 17 35 280 32 35 300 42 35 315 49,5 35 s = blade exposition WH25U s Lp mm mm - 38 - 38 - 38 - 38 - 38 - 38 - 38 1 38 - 57 10 57 20 57 28 57 Mechanism type: WH25C - Manual compact WH25B - Manual basic WH25M - Manual with magnet WH25VSB/DSB - Belimo motorized version WH25VSS/DSS - Siemens motorized version Mechanism type a b mm mm WH25C 63 52 WH25B 100 46 WH25M 122 109 WH25VSB/DSB 85 50 WH25VSS/DSS 97 50 m kg 2,60 2,70 2,80 2,90 3,00 3,20 3,50 4,00 4,50 5,00 5,60 5,90 c mm 94 70 93 65 65 Ordering example WH25B U Mechanism type Connection type Dimension Ød 1 Control mechanism 200 S0M0 We reserve the right to make changes without prior notice 1 2017-08-16
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