#CAPTION# #CAPTION-Mobile# #DOWNLOADTYPE# Download #DownloadDropDown# #file-path# #caption# Home / J.R. Clancy, Incorporated / Fire Safety Curtain Systems J.R. Clancy, Incorporated -Hydraulic DashpotsDOWNLOADSFeatures Used on heavy straight lift fire curtains to slow the last few feet of descent. May be needed to meet code require- ments that the last 8 feet (2.4 m) of travel take 5 or more seconds.Category: coiling fire shutters | fire curtains | stages...MasterFormat: Specialty Doors and Frames | Coiling Doors and Grilles | Entertainment and Recreation Equipment...View Product Details From Manufacturer J.R. Clancy, Incorporated7041 Interstate Island RoadSyracuse, NY 13209 Tel: (800) 836-1885 Fax: (315) email@example.com://www.jrclancy.comFind a rep/distributorRequest More Info DOWNLOADS Related Products Overview Hydraulic DashpotsFeatures Used on heavy straight lift fire curtains to slow the last few feet of descent. May be needed to meet code require- ments that the last 8 feet (2.4 m) of travel take 5 or more seconds. Provides 10′ (3 m) of damping using a double purchased 5′ (1.5 m) piston. 12″ (304.8 mm) diameter sheave for 3/8″ (9.53 mm) dashpot cable. 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. 016-410L used for curtains up to 3,500 lbs.(1,587.6 kg) 016-411L used for curtains up to 1,250 lbs. (567 kg) Custom units available. See More See Less Downloads SpecificationsOptionsProduct CodeDescriptionRWLWeight016-410LHydraulic Dashpot, Heavy Duty3,500 lb (1,587.6 kg)200 lb (567 kg)016-411LHydraulic Dashpot, Standard Duty1,250 lb (567 kg)115 lb (52 kg)RWL is based on an 8:1 safety factor.RWL: RWL is maximum load that can be applied to a block which is in “like new” condition and has been properly installed, maintained and operated.