DORMA BTS 84

DORMA BTS 84Floor springThe economic double actionfloor springSpecial shallow designoptional hold-open.The DORMA BTS 84 is adouble action floor springwhich has been speciallydeveloped for the aluminiumand toughened glass doorindustries.This unit is intended tocomplement our internationallyacclaimed RTSconcealed overhead doorcloser by giving the shopfittingindustry the option ofa DORMA quality floorspring designed for theirparticular purpose.The BTS 84 has many ofthe features of the otherDORMA BTS closers withthe addition of reduceddepth and an array ofaccessories designed for thealuminium door fabricatorand toughened glass doormanufacturer.Quality-assured manufactureto ISO 9001,EN 29001,BS 5750.Certified and verified by BSIQuality AssuranceReg. No. Q 6423, FM 10756Technical Data BTS 84Spring strength EN 2 EN 3 EN 4Standard and up to 1850 mm 2 – –external doors 1) 2) up to 1950 mm – 2 –up to 1100 mm – – 2Closing speed variableby valve adjustment 2 2 2Backcheck – – –Delayed action – – –Hold-open point 190° " " "or 105° " " "Weight in kg, approx. 5.0 5.0 5.0Dimensions in mm Length 306 306 306Width 108 108 108Height 040 040 040Door closer tested to EN 1154 2 2 22 Yes – No " OptionPlus pointsFor the trade2 Outstanding value formoney.2 Also available with strongerand weaker springs forspecial requirements.For the installer2 Easy installation thanks toshallow design.2 Easy to adapt to individualrequirements with dualvalve control 130° to 0°and 130° to 20°.2 Interchangeable spindleinserts available to suitsite conditions.For the architect/specifier2 Concealed unit for invisibleinstallation.2 Minimum floor recessdimension.2 Proven, robust unit fordoor weights up to100 kg.For the user2 Thermoconstant smoothoperation.2 High mechanical efficiencyfor easy door opening.2 Optional single point holdopen1) For applications involving particularly high or heavydoors, and doors which have to close against windor draught conditions, the next larger closer size or theDORMA BTS 80 should be selected.2) Max. opening 130°.Door stop necessary for doors which can open furtherthan 130°.1 Valve for closing speedadjustment 130° – 0°2 Valve for increasingclosing speed 130° – 20°40108 30651– 582149–5410849–542BTS 84, GB