Marine Rectangular Manual Fire Damper

The fire damper is intended for ventilation duct with fire requirement. When on fire, the temperature inside the duct reaches 70℃, fire damper will automatically close quickly to avoid fire spreading. According to the shape, there are rectangular & round type. According to the control way, there are manual, electrical, pneumatic type.The blade can be single blade or multi-blades. The fireproof class can reach A60.

Design Standard: CB/T3557-1995

Main Parts: manual actuator, temperature detector, damper body, damper plate, main shaft, flange, dragline.

1)The fire damper is opened under the normal situation.
2) When the temperature within the duct reaches 70 ± 3 ℃, the temperature fuse is blown, the damper is closed automatically.
3)The fire damper can be closed by dragging the manual steel dragline, the dragline length is nornally 1.5meter.

4) The damper needs to be reset manually.

5)The damper can output electric signal after closing.

a	b	A	B	A1	B1	t1	t2	n	L
100	130	156	186	136	166	68	83	8	320
100	200	156	256	136	236	68	118	8
100	250	156	306	136	285	68	95	10
100	350	158	408	136	388	68	97	12
120	150	176	206	156	186	78	93	8
120	210	176	266	156	246	78	82	10
120	280	176	336	156	315	78	105	10
120	470	176	526	156	505	78	101	14
150	220	206	276	186	258	93	86	10
150	350	208	408	186	388	93	97	12
150	530	208	588	186	570	93	114	14
190	280	246	336	226	318	113	106	10
190	390	248	488	226	428	113	107	12
190	550	248	608	226	588	113	98	16
190	760	250	820	226	798	113	114	18
240	300	296	356	279	339	93	113	12
240	420	298	478	279	460	93	115	14
240	550	298	608	279	588	93	98	18
240	730	298	788	279	768	93	96	22
240	930	300	990	279	970	93	97	26
290	360	348	418	330	400	110	100	14
290	460	348	518	330	500	110	100	16
290	580	348	638	330	624	110	104	18
290	730	348	788	330	770	110	110	20
350	480	408	538	392	520	98	104	18
350	600	408	658	392	642	98	107	20
350	880	410	940	392	920	98	92	28
420	710	480	770	460	752	115	94	24
420	990	480	1050	460	1030	115	103	28
500	810	560	870	540	848	108	106	26

L can be decided by the customer.