Floor Closers - Dorma

This page contains data for Dorma Floor Closers, but you can always order online by clicking the box below.
Order Online


We also have a Wizard for Dorma Floor Closers.

 

Overview

Dorma floor closers come in two series

  • BTS-80 = Heavy Duty
  • BTS-75 = Medium Duty

Most commercial doors use BTS-80 series closers.

BTS80A light weight door or low traffic door would use BTS-75 as it contains a smaller spring and is easier to open.

From the outside, both series look the same.

The internal workings of the BTS-80 are stronger for high traffic and heavier doors. The two series are alike in most other aspects such as : dimensions, cover plates, spindles, etc.

 

Ordering Floor Closers

 

Floor closer packages include the closer body, cement case, cover plate, and top pivot. A number of packages are available and this is what trips most people up.

Packages are described by letters: A, B, C, etc.

Each package is a different configuration of parts, though most packages contain the same basic parts. They differ on the door swing and type of door being used.  You may view our Dorma Main Page to see the difference between offset and center hung.

DORMA Floor Closer Cheat Sheet

Center Hung Packages
A Double Acting (swings both ways), ALUMINUM Door and Frame
G Same as A, but single acting and 3 degree offset spindle
B Double Acting (swings both ways), WOOD or HM Door and Frame
H Same as B, but single acting and 3 degree offset spindle

 

Offset Hung Packages
C 1-1/2'' Offset, ALL Door Types
D Same as C, but 3/4'' offset (this is the standard model for offset hung)
L Same as D, but for extra-heavy doors

Product Tips Quick Tips

Offset hung packages are easier to order as most people get the "D" package.

Center hung is more confusing as there are more options.  Although these closers are double-acting, you can make them swing only one direction by making sure the frame includes a stop.  Frames without a stop are called cased openings.

The 3 degree offset spindle helps hold the door closed.  The offset spindle ensures the closer tries to pull the door closed past zero degrees, thereby adding pressure to a closed door.  Shopping malls and similar applications have air pressure changes that can blow a door open.  The offset spindle holds the door closed better than a standard spindle.