DORMA TS 83 door closer A hydraulic rack and pinion closer for internal and external doors , including fire doors. Adjustable for most doors, backcheck protection, adjustable delayed action, optional hold-open arm. Suitable for most types of fixing. To BS EN 1154. Consult DORMA technical literature for details. DORMA can also provide a design and specification service and it is recommended that they are consulted early in the design process. To BS EN 1154 CERTIFIRE approved, cert. no. CF118 Manufacturer and reference: DORMA UK Limited Door Controls Division Wilbury Way Hitchin Hertfordshire SG4 0AB Tel: 01462 477600 Fax: 01462 477601 Email: hardware@dorma-uk.co.uk Reference: Dorma TS 83 Type: Surface-mounted hydraulic rack and pinion closer Finish: silver, dark brown, colours stainless steel polished brass