China Plug Valve Manufacturers, Suppliers and Factory - Customized Plug Valve

Zhejiang Demelong Fluid Technology Co., Ltd.: Your Professional Plug Valve Manufacturer!

Zhejiang Demelong Fluid Technology Co., Ltd. (DMLV) is a leading industrial valve Manufacturer headquartered in Wenzhou, China. We specialize in the design, development, and production of high‑performance plug valves and flow control solutions for diverse industries such as petrochemical, power generation, wastewater treatment, oil & gas, and industrial fluid systems.

Quality Control

We manage the entire production process, from raw material procurement to final inspection. Each valve undergoes rigorous quality inspection to ensure stable performance, durability, and compliance with international standards.

Customization Available

We support customization based on drawings or samples, meeting non-standard sizes, materials, and coating requirements to suit specific operating conditions.

Advanced Production Equipment

We possess advanced equipment including automatic internal and external cylindrical grinding CNC vertical lathes, CNC machine tools, valve grinding machines, and intelligent universal drive motors.

Wide Range of Applications

Our products are widely used in industries such as petroleum, chemical, natural gas, pharmaceutical, power, and construction.

3way Port Sleeved Plug Valve
Product Introduction This 3-way sleeved plug valve is an industrial valve for multi-directional fluid control. It enables precise flow distribution and redirection in pipelines. Product Features Leak

view more
Metal Seated Plug Valve
Principle of Valve Opening and Closing The process of opening and closing the valve involves: When opening the valve, first turn the handwheel to lift the plug away from the sealing surface, then

view more
3way Side Port Sleeved Plug Valve
Introduction The 3-Way Side Port Sleeved Plug Valve delivers precise and reliable multi-directional flow control for demanding industrial applications. Technical Parameters Pressure range ：CLASS

view more
API Sleeved Type Plug Valve
Introduction The API Sleeved Type Plug Valve is an API-compliant valve designed for reliable fluid control in demanding industrial applications. Technical Parameters Pressure range ：CLASS 150Lb~900Lb

view more
Cast Steel Straight-Through Plug Valve
Designed and manufactured strictly to API 599 and API 6D specifications, this series fully complies with international engineering standards, making it a reliable choice for global EPC projects and

view more
Socket Weld Straight-Through Plug Valve
Socket Weld Straight-Through Plug Valve is a high-integrity industrial isolation valve designed for critical service applications where operational safety, leakage prevention, and long-term

view more
Stainless Steel Straight-Through Plug Valve
The Stainless Steel Straight-Through Plug Valve is a heavy-duty, quarter-turn isolation valve engineered for demanding industrial pipeline systems handling corrosive, chemically active, or clean

view more
Straight-Through Eccentric Plug Valve
The Straight-Through Eccentric Plug Valve is a quarter-turn isolation valve engineered for industrial pipeline systems transporting fluids containing suspended solids, abrasive particles, or

view more
Straight-Through Sleeve Type Soft Sealing Plug Valve
The Straight-Through Sleeve Type Soft Sealing Plug Valve is an industrial quarter-turn isolation valve engineered for pipeline systems requiring reliable shut-off performance under abrasive, slurry,

view more
Straight-Through Lubricated Plug Valve
The Straight-Through Lubricated Plug Valve is a heavy-duty, quarter-turn isolation valve engineered for pipeline systems requiring uncompromising shut-off performance under medium to high-pressure

view more
DN900 Eccentric Plug Valve
Maximize Flow Control with the DN900 Eccentric Plug Valve For large-scale industrial applications where robust fluid management is critical, the DN900 Eccentric Plug Valve offers a powerful solution

view more
Pneumatic Actuated Eccentric Rotary Plug Valve
Product Introduction Pneumatic Actuated Eccentric Rotary Plug Valve is designed for large pipelines handling slurry or viscous fluids. It provides tight sealing and automated flow control, reducing

view more

First 12 3 4 Last

Introduction

A plug valve is a quarter-turn rotary valve used to control the flow of liquids, gases, or other industrial media in pipeline systems.

As a professional plug valve Manufacturer, DMLV designs and produces reliable flow control solutions for demanding industrial environments.

Specifications

Structural style	BB-BG-OS&Y
Driving mode	Handwheel,Bevel gear,Handle
Design standard	API 599,API 6D
Structure length	ASME B16.10
Connecting flange	ASME B16.5
Test and inspection	API 598,API 6D

Features

Quick Quarter-Turn Operation
The valve opens or closes with a simple 90-degree rotation, enabling fast and efficient flow control.

Reliable Sealing Performance
Advanced sealing designs ensure tight shut-off performance and prevent leakage during operation.

Flexible Flow Control
Multi-port configurations allow plug valves to start, stop, or divert flow in complex pipeline systems.

Inspection and Testing Process

Quality control is essential in valve manufacturing. As a responsible plug valve Manufacturer, we implement a strict inspection and testing procedure to guarantee product reliability before delivery.

Raw Material Inspection

All materials are carefully inspected to verify chemical composition and mechanical properties.

Precision Machining Inspection

During the production stage, dimensional accuracy of valve bodies, plugs, and sealing surfaces is checked using precision measuring equipment to guarantee proper assembly and smooth operation.

Pressure and Leakage Testing

Each plug valve undergoes pressure testing and leakage testing.

Final Product Inspection

Before shipment, every valve is inspected for appearance, structural integrity, and operational functionality to ensure it meets strict quality requirements.

Industrial Applications

Plug valves are widely used in many industrial sectors where dependable shut-off and flow regulation are required, including:

Oil and gas pipelines

Petrochemical processing plants

Chemical manufacturing facilities

Water treatment systems

Power generation plants

Industrial fluid transportation systems

Certificate

FAQ

Q: What is a plug valve and how does it work?

A: A plug valve is a quarter-turn rotary valve used to start, stop, or divert the flow of liquids and gases in pipeline systems. It operates through a cylindrical or tapered plug inside the valve body. When the plug aligns with the pipeline, the medium flows through the valve. When the plug rotates 90 degrees, the passage closes and the flow stops completely.
Many industries choose plug valves because of their simple structure, quick operation, and reliable sealing performance.

Q: What industries commonly use plug valves?

A: Plug valves are widely used in industrial systems that require reliable shut-off and flow control. Common applications include:
Oil and gas pipelines
Petrochemical plants
Chemical processing facilities
Power generation systems
Water treatment plants
Industrial fluid transportation systems

Q: Do you provide customized plug valves?

A: Yes. As an experienced plug valve Manufacturer, we provide customization services according to customer requirements. This includes valve size, pressure rating, material selection, sealing type, and special design features. Our engineering team can also assist with technical solutions for specific industrial applications.

Q: How do you ensure reliable delivery for large orders?

A: As a professional plug valve Manufacturer, we maintain organized production planning and efficient supply chain management. This allows us to handle both small and large orders while ensuring stable product quality and timely delivery.

Find professional plug valve manufacturers and suppliers in China here! With abundant experience, we warmly welcome you to buy high quality plug valve made in China here from our factory. Customized orders are welcome.