The positive and negative pressure air duct is specially designed for positive pressure ventilation, negative pressure ventilation, gas transportation, ventilation and ventilation in mines, tunnels, underground mines, workshops and other places. It is made of high-strength, high-toughness, anti-aging and corrosion-resistant polymer materials, which can meet the dual working conditions of positive pressure air supply and negative pressure air extraction at the same time.
The inner wall of the pipe is smooth, the wind resistance is small, no dust accumulation, no scaling, high ventilation efficiency, no bulging or cracking in a positive pressure environment, no deflation or deformation in a negative pressure environment, and has excellent tensile resistance, impact resistance, corrosion resistance, and anti-aging properties.
Flange or hot melt connection, strong sealing, strong connection, no leakage, long-term adaptation to mines, tunnels, underground, workshops and other complex working conditions environment, is the ideal ventilation, gas transmission, dust exhaust, positive and negative pressure air duct.
Steel wire reinforced frame, excellent positive and negative pressure bearing performance
The high-strength steel mesh skeleton is compositely reinforced, which can stably withstand the positive pressure air supply and maximum negative pressure -0.097MPa exhaust conditions of mine ventilation. It resists collapse and bulging deformation, and the pressure is suitable for the mine ventilation pressure level;
Comply with CJ/T 189, MT 181
Double-layer HDPE protection, resistant to erosion in complex underground environments
The inner and outer layers are integrally covered with HDPE, which is resistant to mineral dust, moisture vapor, corrosive gases, underground acid and alkali media erosion, and will not rust, age, or scale;
Resistant to impact and creep, adaptable to underground vibration and deformation
Resist slow crack growth, resist tunnel vibration, surrounding rock extrusion, alternating wind pressure impact, and adapt to mine geological settlement displacement;
Anti-static and flame-resistant, strictly meets mining explosion-proof safety standards
Antistatic and flame retardant modifications can be customized to effectively inhibit the accumulation of static electricity, eliminate hidden dangers of electric sparks, and are suitable for underground gas and dust explosion-proof environments;
Steel and plastic have both rigidity and toughness, and flexible laying is suitable for complex tunnels
The rigidity is better than that of pure PE pipes, and the flexibility is better than that of metal air ducts. It can be bent moderately and is suitable for roadway curves, height differences, and narrow space layouts;
Special sealed connection, no air leakage under positive and negative pressure conditions
Equipped with special electrofusion/flange connection, the interface is tightly sealed, effectively preventing positive pressure air leakage and negative pressure dust leakage, and ensuring the stability of the ventilation system;
Smooth inner wall with low wind resistance, high ventilation efficiency and low energy consumption
The inner wall roughness is ≤0.007mm, and the wind resistance coefficient is low, which reduces ventilation resistance loss, reduces the energy consumption of the main ventilator, and is not easy to be blocked by dust accumulation;
Light weight and easy to install, greatly reducing the difficulty of underground construction
The weight of the pipe is much lower than that of metal air ducts, making it easy to erect underground inclined tunnels and vertical tunnels. DN50‑DN225 coils can be customized to reduce joints and shorten the construction period;
Super long service life and low post-operation and maintenance costs
The mine ventilation working conditions are designed to have a service life of ≥30-50 years, without anti-corrosion and rust prevention, and simple maintenance, which reduces the investment in the long-term ventilation system of the mine.
