JP Jensen Ventilation - Underground Ventilation

JP Jensen Ventilation, with head offices in Malmoe, Sweden, is part of the AB Chr Jensen group. The company was formed in 1879, and is one of the oldest companies in the world specializing in processing PVC-coated material. Since the 1970s, JP Jensen Ventilation has supplied flexible ducting systems to the mining and tunnelling industry.

DUCT MANUFACTURING METHODS

The welding system is based on a superior welding method, developed in our company and patented in 1981 in Sweden. The advantages of this superior welding system include a 40mm-wide welding seam, giving the seam almost the same strength as the material itself.

DUCTING MATERIALS

Long experience and major research work enable us to produce fabrics with minimal elongation of the base fabric. The results of this development can be found in the qualities of JP 501, JP 551, JP 651 and JP 752, which give less elongation in the length direction and practically no extension of the ducting diameter. All qualities are fire retardant and we also supply antistatic alternatives.

UNDERGROUND VENTILATION SYSTEM

Together with bends, Y-branches, T-branches and cones, which are made out of extremely solid fabrics with welded seams, JP Jensen Ventilation offers a complete and dependable ventilation system.

DUCT CONNECTION

For connecting ducts, JP Jensen Ventilation offers three options:

• Traditional connection with a galvanized coupling clamp outside and one or two steel rings welded in the end of the ducting
• Special made zip-joint - very strong and durable
• Our unique JP-Superjoint

JP-Superjoint is a patented solution for creating a straight airflow in a flexible ducting. A unique solution that is designed to eliminate the two most common energy thieves in underground ventilation system: airflow (turbulence) and leakage in the joints. Depending on the size of ventilation system, JP-Superjoint gives savings in the range of 10% to 20% of the overall energy costs.

DUCTING SYSTEM ASSEMBLY

Steel hooks are to be hooked on a longitudinal steel wire, fastened by rock bolts in the tunnel ceilings. The suspension is constructed in such a way that if there is an extraordinary force on the ducting, the steel hooks will break and leave the reinforcements undamaged. Steel hooks are available as spare parts and can easily be reassembled on the ducting.