To maintain U.S. Department of State certification the spacing between bollards in this system must be spaced at 1 meter between cylinder centers.

Yes. Local Contractors can install the bollard systems. Engineers at Cal Pipe's Perimeter Defense Technologies can assist in developing and designing the system that's right for you.

As with any mechanical system, high reliability is a direct result of good preventative maintenance. The power unit, whether hydraulic or pneumatic, requires the most care. The bollards are relatively maintenance free with replacement of the seal ring recommended every 30,000 cycles or 6 months. This time period can fluctuate depending upon the environmental conditions of the installation. Changing the seal ring is a simple task that can be accomplished In less than 5 minutes by removing 7 bolts.

Engineers and architects for most sites prefer PDT's Bollard systems pleasing aesthetic design that delivers the same certified protection as a certified wedge system. PDT's Bollard systems are easier to maintain then a wedge system as the seals around each bollard keep the moving parts wiped clean and isolated from environmental contaminants.

A designed-in battery back-up system supplies enough electricity to the bollard system to allow an operator to optimally re-position the bollard cylinders after a power-outage. Additionally, the stored air in a Pneumatic system or accumulator size in a Hydraulic system will allow a certain number of cycles when external power is not available.

1. A pneumatically powered system allows up to twelve bollards to be operated from one power supply.
2. Maintenance contractors work more frequently with air compressors than hydraulic power supplies making them more familiar with the system.
3. Pneumatic systems are more environmentally friendly.