🌬️ Engineering Ventilation Ductφ800 Product Overview

The φ800 Engineering Positive Pressure Ventilation Duct is a large-diameter industrial air supply hose designed for high-volume airflow applications in tunnel excavation, mine ventilation, underground engineering, and municipal construction projects. Manufactured in strict accordance with Chinese national standards, it ensures safe materials, reliable structure, and stable performance.

With its 800 mm diameter, this duct is ideal for positive pressure fan systems, providing long-distance and large-scale fresh air delivery to challenging engineering sites.

✅ Engineering Ventilation Ductφ800 Key Features & Advantages

Large 800 mm Diameter – Optimized for large-section, high-airflow ventilation systems
Thickened PVC Coated Polyester Fabric – Flame-retardant, anti-static, and wear-resistant
Multiple Connection Methods – Zipper, steel ring, strap, or flange for high sealing and easy assembly
High Wind Pressure Resistance – Suitable for high-power fan air supply
Customizable – Length, color, logo printing, and project ID marking available
Chinese Standard Compliance – No overseas certification required for domestic use

📐Engineering Ventilation Ductφ800 Technical Specifications

Item	Specification
Diameter	φ800 mm
Type	Positive Pressure Air Supply Duct
Material	PVC-coated polyester base fabric
Flame Retardancy	B1 Grade (GB 8624-2012)
Anti-Static	≤ 3×10⁸ Ω (per Coal Safety Standard)
Wind Pressure Resistance	≥ 12 kPa (customizable)
Temperature Range	−20 °C ~ +80 °C
Section Length	5 m / 10 m (customizable)
Connection Options	Zipper / Steel Ring / Strap / Flange
Optional Accessories	Reinforced edge, reflective strip, positioning ring, hanging hooks

🧾Engineering Ventilation Ductφ800 Compliance & Standards

Manufactured in strict accordance with the following Chinese national and industry standards:

GB/T 20043-2015 Flexible Ventilation Duct for Mining
MT/T 391-2012 Technical Requirements for Mine Ventilation Ducts
GB 3836.1-2021 Explosive Atmospheres – Part 1: General Requirements
GB 8624-2012 Classification for Burning Behavior of Building Materials

Available domestic test reports and certificates:

Testing reports from China National Coal Research Institute & Safety Mark Certification Center
MA Mine Safety Certification (for mining applications)
Product Certificate of Conformity, Inspection Report, and Packing List

Note: No overseas certifications (CE, SGS, EN, ISO) are included; design and manufacturing are based solely on Chinese standards.

🏗️ Engineering Ventilation Ductφ800 Applications

Positive pressure ventilation in railway and highway tunnel construction
Subway shield tunneling fresh air delivery
Positive pressure air supply systems in coal and non-coal mine shafts
Large-scale underground municipal utility corridors
Industrial workshop temporary or long-term ventilation solutions
Construction site dust removal and fresh air supply systems

⚙️Engineering Ventilation Ductφ800 OEM/ODM Services (Chinese Standard Version)

OEM: Logo printing, project name, and serial number marking available
ODM: Standard product development, structural selection, and complete ventilation solutions
Fast Sampling & Delivery: Ready stock in standard sizes, urgent orders accepted
Complete Technical Documentation: Chinese manual, test reports, and certificates included with shipment