Product description
Kendrion INTORQ | BA 14.0217 | 07/2021
15
¾
Check if the rotor can be pushed when it is mounted on the hub. A sluggish heavy connection between
the rotor and hub can lead to a continuous slip of the rotor. This would increase the temperature at the
friction joint.
¾
Make sure that the air gap is properly and uniformly adjusted. An uneven air gap adjustment can lead
to continuous slip of the rotor and thus to increased temperatures.
¾
When installing and dismantling the brake, make sure that no solids fall into the friction gap.
¾
Careless assembly, disassembly or operations can lead to sparking. Do not use spark-generating
tools.
¾
Mount the brake so that it does not hit any rotating components. Ensure that there is sufficient clear-
ance to the fan hood and fan blade.
3.2
Design
This chapter describes the variants, design and functionality of the INTORQ BFK458 spring-applied brake.
The basic module E is adjustable (the braking torque can be reduced using the torque adjustment ring).
The special feature for basic module L (with an identical design) is the more durable materials (torque sup-
port, guide pins, toothed intermediate ring, friction lining and gear teeth). The double spring-applied brake
design is especially useful in redundant braking applications.
3.2.1
Spring-applied brake as holding/parking brake
If the spring-applied brake shall be used as a holding/parking brake, all braking torques listed in the
BFK458 spring-applied brake catalog and in the BA14.0186 Operating Instructions are permissible.
The spring-applied brake is identified as a holding brake by the additional notice ("Holding brake") that is
found on an additional name plate.
Example of this marking:
Haltebremse / holding brake
II 3G Ex ec IIC T4 Gc X
II 3D Ex tc IIIB 120°C Dc X
3.2.2
Spring-applied brake used as a holding brake with emergency-stop function and as a
service brake
When using the spring-applied brake as a holding brake with emergency-stop functionality or as a service
brake in an explosive atmosphere, it is absolutely necessary to increase the degree of protection of the
brake. The following measures must be implemented:
¾
Use the brake with a cover ring (without a condensate drain hole) and consequently also with the
Kendrion INTORQ flange/friction plate and the corresponding ring nut for attaching the cover ring (refer
to the section Cover ring assembly, Page 52).
¾
Close the rear bore holes in the torque adjustment ring or in the magnet housing with a suitable radial
shaft seal or a sealing cover (refer to the section Installing the shaft sealing ring, Page 53).
¾
Closing the hand vent holes using (for example) suitable plastic plugs and a suitable sealant.
