Overhead Door Closer OTS 73x
Experience how high comfort meets a slim design: The OTS 73x series impresses with its modern design and particularly compact construction. With the smallest closer bodies on the market, we offer you not only an elegant appearance but also exceptionally easy and pleasant operation. Thanks to uniform dimensions and harmonious details, the series integrates perfectly into any door and architecture. Innovative technology such as the integrated double heart cam action and the optional free swing function ensure maximum convenience – setting new standards in design and functionality with the OTS 73x series.
One system for all applications
As diverse as the functions of your doors are, so are the possible applications of our overhead door closers. With the innovative modular system of the OTS 73x series, you can easily combine the individual components to suit your requirements and adjust them individually. This makes planning, installation, and retrofitting particularly straightforward – and also saves valuable storage space and installation accessories. This way, you benefit from maximum flexibility and efficiency in every project.
The OTS 73x series in detail
- Comparatively smallest closer body on the market with an elegant, slim design
- Uniform dimensions across almost the entire door closer range for a harmonious overall appearance in the building
- Modular system: all application and installation types can be realized with just a few components
- Robust cover in modern GU design instead of slider, available in various materials and finishes, including stainless steel
- Uniform, robust guide rail cover
- Concealed mounting plate for a high-quality, closed appearance
- Uniform drilling pattern for all door closer types
- Precisely adjustable opening and closing movement
- Convenient closing force adjustment with only nine turns from minimum to maximum value
- Visible display of the set closing force
For controlled opening and closing
The closing movement can be individually controlled and regulated in all product variants of the OTS 73x series. This is supported by the precise closing force indicator and the convenient closing force adjustment. In addition, the color-coded, robust full-metal regulating valves allow individual adjustment of closing speed, latching action, opening damping, and delayed closing – precisely according to the building situation and the needs of the users.
closing speed
- Gentle, controlled closing protects children, elderly people and persons with disabilities from injuries.
- Adjustment range between 10° and 180°
final speed
- Adjustment of the closing speed in the last 10° of door opening
- Accelerated door movement to overcome closing resistances such as air resistance
backcheck
- Speed regulation of door opening for gentle damping
- Reduction of the speed of a forcefully opened door in the opening angle range between 60° and 90°
delayed closing action
- Continuously adjustable
- Reduction of the closing speed in the opening angle range between 180° and 70°
- In this range, the door closes more slowly, allowing safe passage for people with luggage, prams, or limited mobility
- When an opening angle of 70° is reached, the door closes at the preset speed
Modern door closers for standard and project solutions
Our door closers combine maximum functional reliability and durability with flexible adjustment options. They ensure reliable and secure closing of the door, increase fire protection and burglary protection, and contribute significantly to the energy efficiency of buildings by ensuring tightly closing doors.
SilentClose technology
The SilentClose technology integrated as standard ensures safe and quiet closing of the door.
Fire protection
By ensuring the secure closing of doors, the spread of fire and smoke within the building is effectively prevented.
Accessibility
The patented double heart cam action enables particularly easy and comfortable opening of the door, so that even children, elderly, and physically impaired persons can use it effortlessly.
Functional reliability
Thermomatic valves ensure consistent closing function during temperature fluctuations, while integrated safety valves in the closer provide protection against overload and vandalism.
Flexibility
Various adjustment options and installation types ensure high flexibility and adapt optimally to different door situations.
Energy efficiency
Consistently secure closing of doors significantly increases the energy efficiency of a building, as neither cold nor heat can penetrate.
Areas of application
- Single- and double-leaf fire and smoke protection doors
- Door leaf width min. 600 mm
- Door leaf width max. 1250 mm / 1400 mm
(OTS 735 / OTS 736) - Usable for DIN left and DIN right
- Door opening and closing angle max. 180° / 120°
(Standard installation hinge side / standard installation opposite hinge side)
Installation types
- Standard installation hinge side (Type BS)
- Head installation opposite hinge side (Type BS)
- Standard installation opposite hinge side (Type BG)
- Head installation hinge side (Type BG)
Technische Daten & Normen
| Technical data | OTS 736 | OTS 735 |
|---|---|---|
| Application | ||
| Max. door leaf width [mm] | 1400 | 1250 |
| Max. door opening angle | 180° | 180° |
| Approved for use on fire doors | x | x |
| Suitable for barrier-free construction according to DIN 18040 | x | x |
| Suitable for barrier-free construction according to DIN SPEC 1104 | x | x |
| Dimensions | ||
| L x H x D [mm] | 268 × 63 × 43 | 268 × 63 × 43 |
| Adjustment functions | ||
| Closing force according to EN 1154 | 3–6 | 2–5 |
| Closing force indicator | x | x |
| Closing speed | x | x |
| Latching action | x | x |
| Opening damping | x | x |
| Delayed closing | Type SV | – |
| Accessories | ||
| Hold-open device electromechanical | optional | optional |
| Hold-open device mechanical | optional | optional |
| Opening limiter | optional | optional |
Standards and safety requirements
Our OTS 73x door closers meet the highest standards: they are ideal for barrier-free construction according to DIN SPEC 1104 and DIN 18040, approved for fire doors, and tested according to EN 1154, EN 1155, and EN 1158 – for maximum safety and comfort.
door closing device with controlled closing sequence
DIN EN 1154 refers to door closing devices with controlled closing action. This standard specifies the requirements and test methods for door closers used on swing doors to ensure that they can reliably close again after opening. The classification of door closers according to this standard is based on criteria such as application class, durability, door closer size, and suitability for fire and smoke protection doors.
Electrically operated hold-open devices for turn-leaf doors
The standard EN 1155 refers to electrically operated hold-open devices for Turn-Only doors. These devices allow doors to be held in an open position and to close automatically when required, for example in the event of fire or smoke. The standard defines the requirements and test methods for these devices to ensure their functionality and safety.
Closing sequence controller – requirements and test method
The EN 1158 standard refers to closing sequence controllers for double-leaf hinged doors. These controllers ensure that the two door leaves close in the correct order to provide effective sealing, especially for fire and smoke protection doors. The standard specifies test requirements and conditions and covers both separately mounted closing sequence controllers and those integrated into the door closer, which may be equipped with electrically operated hold-open devices.
barrier-free construction
The DIN 18040 standard deals with the planning principles for barrier-free construction. It is divided into different parts that cover various aspects of construction to enable people with disabilities, elderly persons, and children to participate equally in everyday life. An important aspect of this standard is the easy opening of doors without external assistance. In this context, requirements are placed on door closers, such as limiting the operating forces to ensure that doors are easily accessible.
Door hardware for use by children, elderly and disabled persons in private and public buildings
DIN SPEC 1104 aims to enable effortless passage through doors, especially for children, elderly people, and persons with disabilities. It recommends the use of manually operated closing devices with a sharply decreasing opening moment. This means that the force required to open the door is reduced by about 40 percent in the range from 2 degrees to 60 degrees of door opening. This specification thus supports barrier-free access in accordance with the principles of universal design.
suitability for fire protection
Approved for use on fire and smoke protection doors
CE marking
The CE marking is a symbol affixed to a product, indicating its conformity with the essential requirements of the relevant European directives. It shows that the product has been assessed regarding safety, health protection, and environmental protection, and can be freely traded within the European Economic Area (EEA).Guide rail sets
The door closers of the OTS 73x series can be combined with the following sets.
