Import Coupling — Buy in Bulk from Supplier in China

The coupling from Yuyao Dongfang Ventilation Engineering Co., Ltd is designed for ductwork connections in HVAC and ventilation systems, featuring male and female ends with optional rubber sealing inserts. It is manufactured to accommodate duct diameters from 100 mm to 800 mm, with wall thicknesses of 0.5 mm to 1.2 mm depending on pressure rating. The product is not intended for high-torque mechanical applications but for air handling systems requiring flexible, leak-resistant joints.

Rubber inserts are made from EPDM or nitrile rubber, selected for resistance to temperature extremes and ozone exposure. The metal shell is typically galvanized steel or aluminum, with zinc coating thickness of 60 to 80 g/m². These materials align with standard practices in commercial HVAC coupling manufacturing. The coupling allows for axial movement up to 25 mm and angular deflection up to 10°, enabling installation in misaligned duct runs.

This coupling is primarily sourced by HVAC contractors, building service engineers, and industrial plant operators in Southeast Asia, the Middle East, and Africa. Orders are commonly placed in quantities of 100 to 2,000 units, packed in polyethylene sleeves with bulk cartons. Trade terms include FOB Ningbo and CIF ports. No certifications are listed; buyers must request proof of compliance with ASHRAE or EN 15780 standards.

Yuyao Dongfang Ventilation Engineering Co., Ltd is located in Yuyao, Zhejiang Province, China, with a registered address on Chang'an Road. The company is classified as an imported supplier with harbor trust tier, indicating basic documentation verification. There is no information on manufacturing scale, workforce, or years in business. The listing implies specialization in ventilation components, suggesting the supplier focuses on ductwork fittings rather than mechanical couplings.

Response rate and average response time are recorded as zero, indicating no active buyer communication channel. No certifications, quality claims, or client references are provided. The supplier appears to function as a trading or light-manufacturing entity. Buyers must independently verify material composition, seal durability, and pressure ratings before committing to orders.