SMS-A
| Type | A(mm) | B(mm) |
| SMS-A200 | 242 | 20 |
| SMS-A250 | 294 | 25 |
| SMS-A315 | 357 | 25 |
| SMS-A355 | 405 | 25 |
– Application: For air exhaust in any type of installation. – The blades will open when the shutter is exposed to overpressure. Pressure of 20 Pa for air speed of 2m/s, 25 Pa for air speed of 3m/s, and 30 Pa for air speed of 4m/s – Material: ABS – Composition: Solid frame made of aluminium,finished grey, RAL 7015 Grey PVC blades |
