They are basically just anaccessory requested by the customer. The chains prevent the travel stops frombeing lost after installation as the stops stay attached to the variable springcan.
![Variable Spring Supports For A Gas Storage Facility In Abu Dhabi Variable Spring Supports For A Gas Storage Facility In Abu Dhabi](/wp-content/uploads/2017/10/IMG_0271.jpg)
Variable Spring Supports for a Gas Storage Facility in Abu Dhabi