Hydraulic rising bollards are designed especially for high security vehicle entrances and for locations that has to be closed for motorized traffic on specific times (like private roads, controlled parking areas, industrial areas, shopping lanes, marketplaces etc). Whenever a vehicle collision occurs; bollards will destroy the front suspension system, steering linkage and other parts of the drive system so the vehicle will move only a few more meters and will be inactivated. They can be installed as a single unit as well as in groups. Bollards are driven hydraulically and the hydraulic drive unit is placed in an installation cabinet close to the bollards. In case of power failure bollards can be lowered manually. Typical raise/lower time is 3 seconds. Standard unit has raised height of 60 cm but for special requirements up to 90 cm lifted height can be manufactured. With the help of plc/microprocessor controlled electronics, raise/lower function can be achieved by every kind of card readers, biometric readers like fingerprint or hand shape, radio control, on/off switch or keyswitch etc. Besides, safety accessories like loop dedectors, photocells, flashing lights or red/green lights can be integrated to the control electronics very easily.

Construction Lifting section of the bollard is manufactured from steel tube with a diameter of Ø350 mm and wall thickness of 36 mm. Roadway surface area is covered by a removable heavy duty plate. The bollard and foundation tube is mounted into a reinforced concrete foundation. This foundation has opening for lead in cables and tubes. Bollard is designed to withstand 17 tons of axle load when lowered. In case of power failure at lifted position, bollard can be lowered manually. Parts forming the drive unit, namely, piston, piston rod, reservoir, solenoid or manual valves, etc. are very precisely manufactured so that they can stand the most harsh environmental conditions. All the parts are hot dip galvanized (60μm) in order to prevent rusting. In addition, the parts which stand above the ground level are electrostatically powder coated.

Foundation tube is the construction that guides bollard during raise/lower action. The bottom flange of the hydraulic cylinder is mounted in the tube therefore the tube has also a part which hydraulic hoses pass through. The hydraulic connections can be reached through this rectangular channel by removing top plate.