Supreme Door Spring Co. The Automatic & Manual Door Specialists
Supreme Door Spring Co. The Automatic & Manual Door Specialists

020 7404 1428

Transom Closers

Supreme Door Spring Co. supply, install, service and repair a wide range of transom closers and transom closer accesseroies from manufacturers such as Dorma, Briton, Peter Jackson, Axim, Newman Tonks, Groom, Ryobi, Adams Rite and Alpro.

A transom closer is a hydraulic overhead door closer which is concealed within the door frame. Transom closers are most commonly found in aluminium main entrance shop front doors. Choosing a transom closer involves the considersation of door weight and width, resistance to opening and closing force (a transom unit does not meed DDA requirements). Both 90 degree hold open (not to be used on fire doors) and non hold open options are available .

We stock a large range of makes and models along with universal transom closer kits. We can also source many other manufacturers transom closers and accessories if required.

View a sample of our transom closer range


Dorma RTS 85
Transom Closers - Dorma RTS85
  • Transom concealed closer
  • EN 3/4/5
  • Max door width: 950mm (EN 3), 1100mm (EN 4), 1250mm (EN 5)
  • 2 valve control of closing speed
  • Cushioned backstop
  • Hold-open option
  • Successful independent testing to EN 1154
    • Peter Jackson PJ20
    Transom Closers - Peter Jackson PJ20
  • Transom concealed closer
  • EN 2/3/4
  • 2 valve control of closing speed
  • Cushioned backstop
  • Hold-open option
    • Groom GRL 050 (Universal)
    Transom Closers - Groom GRL050
  • Opening up to 130°
  • Adjustable closing speed via two valves
  • Suitable for single and double action doors
  • Built in pressure relief valves
  • High grade cast iron mechanism body
  • Side load installation configuration
  • End load installation configuration
  • Available in non hold open or 90 Deg hold open
  • EN 2/3/4
  • Maximum dimension of door of 1100mm
  • Maximum weight of door of 110kg
  • Closing speed adjustable 130° - 15°
  • Latching action adjustable 15° - 0°
  • Compliance with EN 1154 standard
  • Spindle height: Standard 12mm or extended 8mm (20mm total)
    • Axim TC8800
    Transom Closers - Axim TC8800
  • Suitable for single and double action doors
  • Extended spindle models
  • Two valves for closing and latching speed adjustment
  • Preset cushion back–check
  • No hold–open or mechanical hold–open options
  • Three strengths available: light, medium, or heavy duty for door widths up to 1200mm wide and 100 Kgs in weight
  • Standard & Anti finger trap package options are available
  • Dummy unit available
    • Axim TC9900
    Transom Closers - Axim TC9900
    Will replace Axim 8800 series, Dorma, Peter Jackson, Newman Tonks, Ryobi and other leading transom closers without costly modifications to door or frame.

  • Suitable for single and double action doors
  • Two valves for closing and latching speed adjustment
  • Preset cushion back–check
  • No hold–open or mechanical hold–open options
  • Three strengths available: light, medium, or heavy duty for door widths up to 1200mm wide and 100 Kgs in weight
  • Dummy unit available