Underground Ventilation Ducts Manufacturer

Our Product Range

Specializing in, but not limited to, underground ventilation ducts and technical fabrics

Lay Flat Ventilation Duct

High pressure round ventilation ducting ideal for positive pressure airflow. Suitable for tunnel and mine ventilation systems.

Oval Ventilation Duct

Available in lay flat and spiral ventilation ducting suitable for both positive and negative pressure airflow. Ideal for confined spaces.

Semi Rigid Ventilation Duct

Spiral ventilation duct with spring steel wire (φ5mm–φ10mm) reinforced, featured with high pressure resistance and durability.

Industrial Flexible Duct

Flexible duct with PVC laminated fabric and steel wire (φ2mm–φ4mm) reinforcing by rubber strip covered. MSHA approved.

PVC Coated Fabric

High-strength, flame-retardant, and anti-static PVC coated fabric used in ventilation duct manufacturing and industrial applications.

PVC Slitting Fabric

Precision-slitted PVC fabric for customized duct diameters and seamless welding. Ensures optimal airflow and minimal leakage.

PVC Waterproofing Membrane

Durable, flexible membrane for tunnel and underground construction. Resistant to water, chemicals, and root penetration.

EVA Waterproofing Membrane

High-performance ethylene-vinyl acetate membrane with excellent elongation, weldability, and long-term durability in harsh environments.

Fiberglass Rigid Vent Duct

High-temperature resistant rigid duct made from fiberglass-reinforced materials. Ideal for industrial exhaust and HVAC systems.

View All Products

About Sulong

As a leading integrated manufacturer of PVC coated fabrics, Sulong specializes in producing flexible ventilation ducts, technical textiles, and roof membranes for the tunneling, mining, and industrial markets.

Founded in 2007 by a team of specialists with over 30 years of combined experience, Sulong is an expert in developing real-world engineering ventilation solutions for clients across the globe.

With top-of-the-line production technology and a single-source supply chain, Sulong has served over 3,000 projects worldwide, including contractors, fan suppliers, and fabric distributors.

15,000

Square Meters Occupied

2,000

Meters Duct Made Daily

650K+

Meters Duct Yielded Annually

3,000+

Projects Performed

Your Ideal Partner With 4'P's

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Professionalism

Our R&D team has over 30 years of experience. We tailor fabric ingredients precisely and test ducts rigorously to meet your performance needs.

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Price

As an integrated manufacturer, we offer competitive pricing without compromising quality. We fit production plans to your project budget.

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Product Performance

Our fabrics meet industrial standards and customer-specific requirements. Recognized globally for reliability and durability.

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Project Provider

We offer one-stop service support and on-demand supply. Our long-term partnerships reinforce our strength in engineering and execution.

Quality Control & Testing

At Sulong, quality is engineered into every product. Our laboratory is equipped with advanced testing instruments to ensure every batch meets international standards.

🔥 Flame Retardancy: Tested in flame chamber
🌡️ Heat Resistance: Evaluated in low-temperature chamber
💪 Tensile Strength: Measured with tensile strength tester
⚡ Anti-Static Capacity: Verified with insulated resistance tester

Certifications: ISO9001, ISO14001, CE, and SGS Test Reports available.

Industries We Serve

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Tunneling Ventilation

We provide complete ventilation system design and ducts for metro, rail, and urban corridor projects like Guangzhou Metro and Melbourne Metro Rail.

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Mine Ventilation

MSHA-approved flexible ducts ensure safe and efficient airflow in underground mining operations, enhancing worker safety and productivity.

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Industrial Ventilation

Custom ducting solutions for factories, power plants, and large-scale HVAC systems requiring high-flow, durable ventilation.

Start Your Project With Sulong

Benefit from over 30 years of experience, free samples, free ventilation design plans, and SGS testing.

Easy-to-Operate Process

Quote: Provide site details or duct specs

Confirm the Design

Confirm the Sample (Free SGS Testing)

Check & Take Delivery

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A Vertically Integrated Manufacturer of ATEX Underground Ventilation Ducts & Fabrics