China Customized Sleeve Type Soft Sealing Plug Valve Manufacturers Suppliers Factory

Zhejiang Demelong Fluid Technology Co., Ltd.: Your Professional Sleeve Type Soft Sealing 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

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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

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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

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API Soft Sealing Plug Valve
Introduction The API Soft Sealing Plug Valve is a reliable, API-compliant valve designed for efficient fluid control in demanding industrial applications. Technical Parameters Pressure range ：CLASS

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Butt Weld Plug Valve
Technical Parameters Pressure range ：CLASS 150Lb~900Lb Nominal diameter ： NPS 1/2-24" Body：WCB,WCC,CF8,CF8M,CF3,CF3M,UB6 etc Plug : WCB,WCC,CF8,CF8M,CF3,CF3M,UB6 etc Sleeve：PTFE(≤120℃)/

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Butt Weld Sleeved Plug Valve
Introduction The Butt Weld Sleeved Plug Valve is a durable, high-performance valve designed for reliable fluid control in demanding industrial applications. Technical Parameters Pressure range ：CLASS

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DIN Sleeved Type Plug Valve
Introduction The DIN Sleeved Type Plug Valve is a reliable, versatile valve designed to meet DIN standards for demanding industrial fluid applications. Its robust design ensures efficient operation

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Full Port Sleeved Plug Valve
Introduction The Full Port Sleeved Plug Valve provides reliable, high-efficiency fluid control for demanding industrial applications. Technical Parameters Pressure range ：CLASS 150Lb~900Lb Nominal

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Jacketed Sleeved Plug Valve
Introduction The Jacketed Sleeved Plug Valve delivers precise temperature control and reliable fluid management for demanding industrial application. Technical Parameters Pressure range ：CLASS

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Plug Valve with Pneumatic Actuator
Introduction The Plug Valve with Pneumatic Actuator provides fast, precise, and reliable automated fluid control for demanding industrial applications. Technical Parameters Pressure range ：CLASS

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Sleeved Plug Valve with DI Body
Introduction The Sleeved Plug Valve with DI Body is a durable, cost-effective solution for reliable fluid control in municipal, irrigation, and light industrial applications. Technical Parameters

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Sleeved Plug Valve with Gear Box
Introduction The Sleeved Plug Valve with Gear Box is a durable valve system designed for precise and reliable fluid control in high-torque manual operations. Technical Parameters Pressure range

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Introduction

A Sleeve Type Soft Sealing Plug Valve is a non-lubricated quarter-turn valve that uses a PTFE or elastomer sleeve as the sealing element between the plug and the valve body.

As a professional Sleeve Type Soft Sealing Plug Valve Manufacturer, we supply valves designed for petroleum, chemical processing, water treatment, pharmaceutical, and power industry pipelines, providing reliable sealing performance for corrosive or viscous media.

Specifications

Structural style	BC
Driving mode	Wrench wheeLworm & worm gear,pneumatic,electric-actuated
Design standard	API599,API6D
Structure length	ASME B16.10
Connecting flange	ASMEB16.5
Test and inspection	API598.API6D

Features

Soft Sleeve Sealing Structure

The valve uses PTFE or elastomer sleeves to create a tight seal around the plug, preventing leakage and reducing friction during operation.

Non-Lubricated Design

Unlike lubricated plug valves, the sleeve provides natural lubrication, which reduces maintenance requirements and contamination risks.

No Body Cavity Design

The valve body has no cavity where fluid can accumulate, helping prevent clogging or media solidification.

Self-Cleaning Function

During rotation, the plug edge helps remove deposits on the sealing surface, improving reliability in sticky or dirty media conditions.

Low Operating Torque

The sleeve reduces metal contact and friction, allowing smooth operation and easier automation.

Inspection Process

Material Inspection
All raw materials are verified for chemical composition and mechanical properties before production.

Precision Machining
CNC machining ensures accurate plug dimensions, sleeve seating surfaces, and valve body alignment.

Assembly and Function Testing

Technicians assemble internal components and test the rotation of the plug to ensure smooth operation.

Pressure and Leakage Testing

Each valve undergoes hydrostatic shell testing and seat leakage testing according to API or international standards.

Final Quality Inspection

Finished valves are inspected for dimensions, coating quality, markings, and packaging.

Certificate

FAQ

Q: What materials are used for the sleeve?

A: Common sleeve materials include PTFE, RPTFE, EPDM, and other elastomers.

Q: What pressure ratings are available?

A: Typical pressure classes range from Class 150 to Class 600.

Q: What temperature range can the valve handle?

A: Most designs operate between -29°C and 180°C, depending on materials.

Q: Can the valve handle corrosive media?

A: Yes. The sleeve protects internal metal parts from direct contact with corrosive fluids.

Q: Is maintenance required frequently?

A: No. The non-lubricated design requires minimal maintenance.

Q: Can the valve be automated?

A: Yes. Pneumatic or electric actuators can be installed.

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

Butt Weld Sleeved Plug Valve, bleed plug valve, Sleeved Plug Valve With DI Body