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Kendrion N.V.

Kendrion N.V. is a public limited liability company incorporated under the laws of the Netherlands, with its registered office in Zeist.

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Kendrion Commercial Vehicle Systems, LINNIG, fire-protection technology, shutting-speed regulators with locking device and electrical opening aid

Shutting-speed regulators with locking device and electrical opening aid

Kendrion's shutting-speed regulators are developed with well-proven Kendrion engeneering know-how and meet all requirements for your fire-protection closures!

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Product information

With Kendrion's shutting-speed regulators of the LINNIG brand, you can actuate and regulate your fire-protection closures in line with statutory provisions – And, by the way, in an exceptionally secure and compact manner.

The regulation of the shutting speed is based on an eddy current system. Within the system, a copper disc as well as a steel disc behind it, are brought into rotation in front of circularly arranged permanent magnets. The poles of the permanent magnets are arranged alternatingly, so that the resulting eddy current in the copper disc results as a braking torque on the drive shaft.

By adjusting the air gap between the copper disc and the permanent magnets, the braking power can be changed. A smaller air gap corresponds with a higher braking torque, whereas a larger air gap leads to a reduction of the braking force. To ensure the required speed for effective operation of the eddy current system, all Kendrion shutting-speed regulators are equipped with a reduction gear with hardened gear wheels. This enables maximized service life of at least 200,000 shutting cycles to be achieved.

The gate itself is opened via an electric motor. The brake is decoupled in the opening direction by means of a free-wheel in the deflection pulley or in the chain wheel. Thus, the motor only operates against the mass of the gate as well as the counterweight.

The gate itself is locked in position by means of a spring-supported armature disc, which is drawn against the pole surfaces of the magnet body upon actuation of the ring-formed electromagnet. By means of a wire cable, a linked chain or a toothed belt, this force keeps the gate in position.

Of course, this ingenious concept can also be applied for other technical solutions - Feel free to contact us! – We'll find the optimal solution for your applications.

Specifications and technical data

Max. shaft loading: 1,000–8,500 N
Max. shutting force in wire cable: 200 – 680 N
Voltage, holding element: 24 V
Max. holding torque: 12.9 – 43 Nm
Power rating of locking device: 4.9 - 5 W +/- 10%
Power rating of opening aid: 0.07 – 0.23 kW
Drive torque of opening aid: 20 – 45 Nm
Degree of protection, unit (IP): IP 54
Degree of protection, connection (IP): IP 50
Permitted braking power: 60 – 200 W
Permitted operating temperature range: -15 C to +40°C
Adjustable shutting speed: 0.08 - 0.2 m/s

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