Sulong manufactures a wide array of flame-retardant flexible ducts fit for the underground ventilation system. No matter what role you play in a specific underground operation project, we are prepared to cooperate with you with our competitively priced ducts of optimal technical performance.
With 30+ years in producing ventilation ducts and pipes, we as a professional tunnel ventilation duct manufacturer have served over 1000 domestic and overseas clients, including project contractors, mining and tunneling ventilation fan manufacturers, vent hose wholesalers and distributors.
High pressure round ventilation ducting ideal for positive pressure airflow
Available in lay flat and spiral ventilation ducting suitable for both positive and negative pressure airflow
Spiral ventilation duct with spring steel wire (φ5mm-φ10mm) reinforced featured with high pressure resistance
Exclusive hot-welded construction (best practice technique in the industry) builds the low-leakage ducting system as the nylon fabric adheres to the PVC film seamlessly, which delivers more air to where it is needed.
In-house R&D experts produce durable ducts as the PVC film is made evenly by the perfect reaction of top-quality PVC resin and other chemical components.
The flexible design in the ventilation system enhanced by exceptional performance makes the duct easy to install, extend and repair during the underground operation.
When your ducting system is built by Sulong
Hot-air welded construction between each section of duct seals the whole ducting system flawlessly.
Superior fabric grades and subtle jointing methods make ventilation ducts with friction factor far below customer requirements, let alone the industrial standard.
Project Contractors/ International Purchasers/ TBM Equipment Providers/Duct Wholesales & Distributors/ Ventilation Equipment Manufacturers
Sulong cooperated with reliable partner Korfman extractor fan(Top 3 in its industry) to achieve your entire ventilation system design in one turnkey solution and save your operation costs and time.
A wide array of flame retardant ducts with custom choices standing by adapt to your actual operation ventilation, FREE SGS testing for your ventilation textile is available once you require it.
All ducts are guaranteed for 24 months. Free new products supplied if the original goods are damaged during delivery. On-site technical support is available if the ducting system gets ruined during operation.
Solve all ventilation factors to build best-match ducting system by industrial experience
Tight hanging method (means proper space) for ducting saves the fabric quantity and helps underground workers work better.
The appropriate distance helps fan deliver air sufficiently with proper power consumption.
Proper design concludes the maximized straightness between the air and duct, which affects energy consumption in air delivery.
Data-based design minimizes the risks in leakage as the friction factor would tell you a specific type of duct is suitable for your project or not.
Sulong with a full product line in underground ventilation is ambitious to offer engineered solution backed by rich experience and Korfmann ventilation calculator (a tool based on SIA class and current European standards determines the recommended ventilation duct diameter and working air pressure.)
All you need to do is just offer some details about the on-site mining or tunneling operation work plan.