WK25
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Fire damper Rectangular 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 WK Series 25 Manual command B Command C type M Position S0 indication S2 microswitches M0 Rectangular fire damper Blade thickness 25 mm Manual command Compact 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 Motor type Siemens motor GRA 126 (24V) Siemens motor GRA 326 (230V) Belimo motor BFL24T (24V) Belimo motor BFL230T (230V) Belimo motor BFL24T-ST (24V) Nominal dimension (mm) Nominal dimension (mm) All combinations of base (a) and height (b) dimensions are available. It is possible to pair two dampers for bigger duct dimension. S1 S2 (blade exposition) mm 21,5 46,5 71,5 96,5 121,5 146,5 7,5 171,5 32,5 196,5 57,5 221,5 Mechanism type Side a Side b Control mechanism We reserve the right to make changes without prior noti

Fire damper Technical data Mechanism type: WK25B - Manual basic WK25M - Manual with magnet WK25 VSB/DSB - Belimo motorized version WK25 VSS/DSS - Siemens motorized version Mechanism type WK25B WK25M WK25VSB/DSB WK25VSS/DSS We reserve the right to make changes without prior notice

Fire damper Technical data Fire resistance classification according to EN 13501-3. Flexible wall Rigid wall EI 180 S (500 Pa) EI 120 S – Installation within vertical rigid wall Wall min. thickness 100 mm Wall min. density 550 kg/m³ Wet sealing method Mortar or plaster putty sealing ve (i↔o) EI 120 S – Installation within vertical rigid wall Wall min. thickness 100 mm Wall min. density 550 kg/m³ Dry sealing Plasterboard and rock wool 100 kg/m³ method sealing ve (i↔o) EI 120 S – Installation within vertical light wall (plasterboard) Wall min. thickness 100 mm Wall rock wool min. density 100...

Fire damper Technical data Flexible wall Rigid wall Fire Batt (Weichschott) sealings. EI 120 S EI 90 S (300 Pa) (300 Pa) EI 120 S Installation within rigid vertical wall with Fire Batt (Weichschott) sealing Wall min. thickness 100 mm Wall min. density 550 kg/m³ a×b a×b Wet sealing Rock wool 140 kg/m³ and endothermic min 100×200 min 100×200 method max 800×600 max 800×600 varnish sealing ve (i↔o) EI 120 S Installation within vertical light wall (plasterboard) with Fire Batt (Weichschott) sealing Wall min. thickness 100 mm Wall rock wool min. density 100 kg/m³ a×b a×b Wet sealing Rock wool 140...

Fire damper Technical data Installations remote from the construction support. Flexible wall Rigid wall EI 120 S Installation remote from the vertical rigid wall Wall min. thickness 100 mm a×b a×b Wall min. density 550 kg/m³ min 100×200 min 100×200 Mortar or plaster putty sealing max 800×600 max 800×600 ve (i↔o) EI 120 S Installation remote from the vertical rigid wall with Fire Batt (Weichschott) sealing Wall min. thickness 100 mm a×b a×b Wall min. density 550 kg/m³ min 100×200 min 100×200 Rock wool 140 kg/m³ and endothermic varnish sealing max 800×600 max 800×600 ve (i↔o) EI 120 S –...

Fire damper a×b nominal dimensions of damper ve vertical installation ho horizontal installation (i↔o) origin of fire is irrelevant Pa negative pressure E integrity I thermal insulation S smoke seal For more detailed information visit: http://www.mp3-italia.it The fire resistance classifications refer to the conditions obtained by rigorously applying the instructions indicated in the Technical Manual, with reference both to the construction of the wall/ceiling and the installation of the damper. We reserve the right to make changes without prior notice