Bestsellers

The products are widely used in the ventilation systems and smoke exhaust systems of various industrial and civil buildings.

It features high sensitivity, reliable operation, and low air leakage.

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Fire Damper

Remote Smoke Exhaust Valve

Analog Control Valve

Vee Valve

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Product Category

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Service Name

Fire Damper Series

Muffler Series

Aluminum Alloy Air Outlet Series

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Positive Pressure Air Supply Inlet

Air Volume Control Valve Series

Smoke and Fire Damper Series

Smoke Exhaust Valve (Outlet) Series

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Ningbo Yinzhou Donghai

Our factory specializes in manufacturing various specifications and models of HVAC (Heating, Ventilation and Air Conditioning) accessories, including fire dampers, smoke dampers (inlets), air supply inlets, as well as control valves, butterfly valves, mufflers, silencing elbows and aluminum alloy air grilles. Among these products, the fire dampers, smoke dampers (inlets) and air supply inlets are new-generation products—developed by domestic experts in accordance with the latest domestic standards and specifications. The fire dampers and smoke & fire dampers have passed tests by local inspection centers, with performance fully complying with regional standards; the mufflers have been tested by the Acoustics Research Laboratory of Tongji University (Shanghai), and their performance...

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Company Profile

Our factory was founded in 1993, with a registered capital of RMB 2.1 million. Its annual production capacity reaches 100,000 units of various valves, 10,000 units of various air grilles, and 5,000 sets of various mufflers.

10,000+ units

Annual production volume of various valves

300+ companies

50+ people

28+ years

Served customers across the country

High-quality R&D personnel

Industry service experience

Honor and Qualification

Sold in More Than 20 Countries

The service network covers the whole country, integrates online and offline channels, provides customized solutions, and features efficient response and guaranteed technology.

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Fire protection systems

Application Fields

Widely used in the ventilation systems and smoke exhaust systems of various industrial and civil buildings.

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Basements

Ventilation systems

Central air conditioning in high-rise buildings

Large workshops

Test Report

With years of industry experience, our professional standards comply with regional quality inspection indicators.

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Inspection Report for Double-Layer Louver
Inspection Report for Fire Damper FHF WS-FK-1250X800
Test Report for Impedance Composite Muffler

Contact

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Customer services

Contact us

E-mail: donghai.0574@vip.163.com

Company Fax: 0574-88344369

Tel: 13335747988

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