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
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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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![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... -
![What Is A Three-way Side-port Sleeve-type Plug Valve, And What Are Its Main Features?]()
Sep 20, 2026What Is A Three-way Side-port Sleeve-type Plug Valve, And What Are Its Main Features?As industrial process systems become more automated and pipeline layouts become more complex, valve manufacturers are facing increasing requirements for reli... -
![What Points Should Be Considered During The Installation And Maintenance Of Three-way Sleeve-type...]()
Aug 24, 2026What Points Should Be Considered During The Installation And Maintenance Of Three-way Sleeve-type...Three-way sleeved plug valves is widely used in oil, gas, chemical, energy, industrial fluid control system, mainly for flow splitting, flow consolidation an...
