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Used
on heavy straight lift fire curtains to
slow the last few feet of descent. May be
needed to meet code require- rments that
the last 8 feet of travel take 5 or more
seconds. |
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Provides
10' of damping using a double purchased
5' piston. |
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12"
diameter sheave for 3/8" dashpot cable. |
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The
dashpot is rigged in a double purchase arrangement
with a cable which is snatched by the fire
curtain arbor when the curtain is nearing
the floor. The dashpot cable pulls on the
sheave at the top of the piston rod of the
hydraulic cylinder. A fluid flow adjusting
valve is preset to provide the appropriate
retarding force on the piston, braking the
descent of the curtain. The piston and cylinder
automatically release the oil to return
the unit to an "at rest condition"
when the curtain is raised. |
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016-410L
used for curtains up to 3,500 lbs. |
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016-411L
used for curtains up to 1,250 lbs. |
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Custom
units available. |
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