Eccentric Half Ball Valves

Description

Product Details

High-Performance Eccentric Half-Ball Valves for Abrasive and Two-Phase Media Control

Ainox is a professional eccentric half-ball valves factory in China, specializing in the manufacturing of advanced industrial valve solutions for challenging pipeline applications. Our eccentric half-ball valves are designed with an eccentric valve body, eccentric ball structure, and optimized seat design to provide reliable sealing performance, excellent wear resistance, and long service life under harsh operating conditions.

Ainox provides customized precision half ball valve solutions for industries including metallurgy, power generation, petrochemical processing, wastewater treatment, paper production, and energy systems.

Product detail images:

Product Features:

1. Eccentric Compression Structure: Through the transmission mechanism, it achieves compression, adjustment, and closure. The sealing ring features a metal surface ring for hard-contact sealing. The double eccentric structure ensures that when the valve is open, the ball is recessed within the cavity, providing a large flow cross-section and avoiding scouring. During closure, the ball gradually conforms to the seat, effectively scraping away scale and ensuring reliable sealing. This design is particularly suitable for two-phase mixed media prone to scaling or containing solid precipitates.

2. Bimetal Overlay Welding Technology: Different alloys are overlay-welded onto the surface of the half-sphere base material, while the seat is correspondingly overlay-welded and specially treated. The sealing surface exhibits properties such as corrosion resistance, wear resistance, and high strength, meeting the requirements of various operating conditions.

3. Zero-Leakage Sealing: With stringent sealing performance, zero leakage can be achieved when conveying hazardous gases.

4. Adjustable and Maintainable Design: The sealing ring includes a compensation allowance, allowing seal restoration through slight rotation after wear, thereby extending service life. The compression nut is removable, facilitating seat adjustment or replacement and avoiding the need to scrap the entire valve.

Applicable Working Conditions for Bimetal Sealing Rings (Overlay Welding Alloy/Composite Ball):

1. General-Purpose Valves: DN40–1600. Suitable for applications requiring tight sealing, such as wastewater treatment, pulp handling, and urban heating systems.

2. Oil and Chemical Industry Valves: DN40–1600. Suitable for oil products like crude oil and heavy oil, as well as weakly corrosive and two-phase mixed media in the chemical industry.

3. Gas-Specific Valves: DN40–1600. Suitable for gas transmission control, including coal gas, natural gas, and liquefied petroleum gas.

4. Slurry-Specific Valves: DN40–1600. Suitable for liquid-solid two-phase mixed media or industrial pipelines where crystallization or scaling is likely to occur during liquid transport.

5. Coal Ash and Slag Valves: DN40–1600. Suitable for power plant hydraulic ash removal systems and pneumatic ash and slag transport pipeline control.

Typical Application Fields:

1. Steel & Metallurgy: Gas transmission, dust removal, cooling water, slurry pipelines  

2. Power & Energy: Ash/slag removal, coal powder conveying, flue gas treatment  

3. Petrochemical: Crude oil transportation, catalyst control, chemical process regulation  

4. Environmental & Water Treatment: Sewage treatment, sludge conveying, wastewater treatment  

5. Paper & Textile: Pulp conveying, black liquor treatment, slurry regulation

Main Component Materials:

Name				Material
Valve Body				QT450, WCB, ZG20CrMo, ZG1Cr18Ni9Ti
Valve Shaft				2Cr13, 1Cr13
Valve Disc				Nitrided Alloy Steel, Nitrided Stainless Steel, Wear-Resistant Steel
Valve Seat				Nitrided Alloy Steel, Nitrided Stainless Steel, Wear-Resistant Steel
Bearing				Aluminum Bronze, FZ-1 Composite Material
Packing				PTFE (Polytetrafluoroethylene), Flexible Graphite

Performance Parameters:

Nominal Pressure (MPa)		0.6		1		1.6			2.5			4
Nominal Diameter (mm)		40~1600		40~1600		40~1200			40~600			40~600
Sealing Test Pressure (MPa)		0.66		1.1		1.76			2.75			4.4
Shell Test Pressure (MPa)		0.9		1.5		2.4			3.75			6
Applicable Temperature (°C)		-29 ~ 300, -29 ~ 425, -29 ~ 540
Applicable Medium		Fresh Water, Sea Water, Sewage, Acids and Alkalis and Other Liquids, Slurry, Steam, Gas, Oil Products
Drive Method		Manual, Electric, Pneumatic
Connection Form		Flange Connection, Wafer Connection
Installation Method		Vertical Installation, Horizontal Installation

Dimensional List:

Packaging & Delivery

Minimum Order Quantity: 1 unit

Delivery Lead Time: 15-25 days

Payment Terms: Prefer T/T (Telegraphic Transfer) with full payment in advance

Packing Material: Export-standard wooden case

Service Support

Technical Consultation: Provides selection guidance and operating condition suitability analysis.

Customization Services: Supports customization of special materials, pressure ratings, connection methods, and control signals.

Installation and Commissioning: Provides installation guidance.

How to Choose the Right Eccentric Half-Ball Valve

Selecting the correct valve requires consideration of several factors.

1. Media Characteristics

Confirm:

• Solid particle content

• Fiber content

• Corrosiveness

• Viscosity

For abrasive or particle-containing media, wear-resistant materials are recommended.

2. Pressure and Temperature Requirements

Important parameters include:

• Operating pressure

• Working temperature

• Pressure fluctuations

Proper material selection ensures long-term reliability.

3. Sealing Requirements

Different applications require different sealing solutions.

Consider:

• Leakage requirements

• Media hazards

• Maintenance expectations

Ainox provides professional sealing recommendations according to working conditions.

4. Automation Requirements

Available operating methods include:

• Manual operation

• Electric actuator

• Pneumatic actuator

Automation solutions can be customized according to project requirements.

Maintenance Guide for Eccentric Half-Ball Valves

Proper maintenance helps maximize valve performance.

Regular Inspection

Check:

• External leakage

• Operating torque

• Valve movement

• Connection condition

Maintain Sealing Components

Regularly inspect:

• Seat condition

• Sealing surface wear

• Compensation adjustment

Timely maintenance helps prevent unexpected failures.

Keep Pipeline Conditions Under Control

Avoid:

• Excessive particle accumulation

• Abnormal pressure impact

• Improper operation

Correct operating conditions extend valve service life.

Customized Eccentric Half-Ball Valve Solutions

As an experienced eccentric half-ball valves factory, Ainox provides customized manufacturing services for global industrial customers.

Customization includes:

• Special sealing materials

• Pressure rating adjustment

• Connection methods

• Surface coatings

• Actuation solutions

• Material selection

Our engineering team provides working condition analysis and valve selection recommendations to ensure optimal performance.