Zhejiang Demelong Fluid Technology Co., Ltd. was established on April 3, 2008. The company specializes in the production and R&D of various plug valves, including pressure boosting plug valves, tracked plug valves, inverted oil seal plug valves, compression accessory plug valves, and eccentric plug valves.
Products Categories
- Sleeve Type Soft Sealing Plug Valve
- Double Block and Bleed Plug Valve
Plug Valve
Learn MoreWe're Committed to Top-Notch Quality
Why Choose Us
Demelong focuses on plug valve manufacturing for demanding industrial pipeline systems. We combine practical production experience, precision machining and export-oriented service to provide reliable valve solutions for a wide range of operating conditions.
Our Advantages
Professional plug valve manufacturer
Product range covering multiple plug valve types
API and CE based quality standards
Precision CNC machining and grinding equipment
Custom production for different working conditions
Stable support for international orders
Diverse Designs & Techniques to Meet
Your Custom Needs
You can choose to fulfill your tinplate packaging needs or contact usfor your specific requirements.
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Custom Product Design
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Rich Material Selection
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Custom Performance
Latest News
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![What Points Should Be Considered When Installing Metal-seated Plug Valves?]()
Oct 21, 2026What Points Should Be Considered When Installing Metal-seated Plug Valves?Metal seat plug valve is an industrial valve that controls pipeline flow by rotating the stopper. It is widely used in petroleum, chemical industry, natural ... -
![What Is A Metal-seated Plug Valve, And in Which Industrial Systems Is It Primarily Used?]()
Oct 13, 2026What Is A Metal-seated Plug Valve, And in Which Industrial Systems Is It Primarily Used?Metal seat plug valve is a kind of sealing plug valve which utilizes metal andmetal contact surface to control the flow of pipeline media,such as opening, cl... -
![For Which Industrial Piping Systems Are Three-port Side-outlet Sleeve-type Plug Valves Suitable?]()
Sep 23, 2026For Which Industrial Piping Systems Are Three-port Side-outlet Sleeve-type Plug Valves Suitable?Introduction With the development of petrochemicals, natural gas, fine chemicals and industrial automation sectors, pipeline systems require more and more ad...
