Drives for Fire Resisting Rolling Shutters
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Fire resisting roller shutters are not counter balanced and use a brake release operated by the fire alarm or fusible link so that the door closes under its own weight |
| The three models of drive DLA150W, DLA250W and DLA600 include a centrifugal governor to control the rate of descent when closing under self-weight. |
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Seleciton Chart
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Use this chart to select the correct drive model for your application. Calculate the total curtain weight (kg) including the bottom rail. Using the weight and the curtain wisth (m) find the corresponding point on the graph. Choose the drive and tube so that the corresponding point lies below and to the left of the boundry line |
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DLA150W |
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DLA250W |
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DLA600 |
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© Guthrie Douglas Ltd. 2005