Trusted Segment Ball Valve Manufacturer









Reliable Segment Ball Valve
A segmented ball valve shares similarities with a conventional ball valve but features a contoured V-notch segment within the ball. This design offers excellent rangeability, control, and shutoff capability. The V-notch ball provides positive shearing action, resulting in an inherent equal percentage flow characteristic.
This valve excels in delivering non-clogging, high-capacity flow control. The V-notch ball is specially contoured to maximize capacity while enhancing both seal life and shutoff integrity.

Quality Control

PMI Test

Sealing Test

Low Emission Test

Impact Test

Dimension Inspection

Painting Thickness Test

PT

Material Inspection
Our Valve Applications in Key Industries

Chemical Processing

Petrol Chemical

O.P.G & Nuclear

Pulp

Mining

Water & Sewage

Steam System

Boiling System
Get More Versatile Valve
Specifications
Standards and Certifications
- Standards: ASME (B16.34, B16.10, B16.25), PED, DIN, CRN, ISO, NACE, EN
- Certifications: CRN, ISO 15848, PED, PED(S)R, TR CU, TSG, UA.TR.089
Size and Pressure Range
- Size Range: NPS 1, 1.5, 2, 3, 4, 6, 8, 10, 12, 16 / DN 25 to 400
- Pressure Class: ASME Class 150, 300, 600; EN 1092 PN 10, 16, 25, 40
Materials
- Body Materials: Stainless Steel (CF8M), Carbon Steel (WCB), 316L (Others available upon request)
- Stem Materials: 17-4PH, Nitronic 50 (XM-19), Super Duplex, SMO 254 Stainless Steel
- Seat Materials:
- Resilient Seat: (316) Stainless Steel with Tek-Fil® Insert (S19)
- Metal Seat: (316) Stainless Steel with Stellite Hard Facing (S19 & S19L)
- Solid Tungsten Carbide (S19L)
- Ball Materials:
- S19: Stainless Steel (CF8M), CF8M Hard Chrome Plated
- S19L: CF8M with proprietary hard face coating
Temperature and Pressure Ratings
- Temperature Range: -50°F to +500°F (-46°C to +260°C)
- Maximum Allowable Operating Pressure: ASME Class 150, 300, 600
Shutoff and Testing Standards
- Shutoff Rating:
- Metal Seat: Class IV per IEC 60534-4 / ANSI / FCI 70-2
- Soft Seat: Class VI per IEC 60534-4 / ANSI / FCI 70-2
- Testing Standard:
- Shell Test: API 598
- Seat Leak: ANSI FCI 70-2
Ports and Connections
- Ports: Reduced Port (90° standard, 60°, 30°, and custom segment profiles available)
- End Connections: Flanged, Flangeless (Wafer)
- Face to Face Dimensions:
- Flanged: ANSI/ISA 75.08.02 / ASME B16.10
- Flangeless: Bray Internal Standard
Industries and Applications
- Power: Conventional Steam, On/Off and control applications in power plants.
- Chemicals: Organic & Inorganic chemical processing, including control and shutoff applications.
- Water: Water management systems, including treatment and distribution.
- Oil & Gas: Midstream transportation of oil and gas, including slurry and abrasive materials.
- General Industries: Pulp & Paper, Mining, Sugar and Ethanol Production, Refining, and HVAC systems.
- Food & Beverage: Safe and efficient fluid control in food and beverage production processes.
- Other Applications: Highly abrasive slurry applications across multiple industries requiring durable valve performance.

Features & Benefits
Feature | Description | Benefits |
Eliminates exposed flange bolting | Reduces installation time and enhances piping integrity. | Easier installation and secure valve fittings. |
Solid HD ball seal | Durable construction for long service life. | Reliable in harsh environments. |
Vee-Ball with equal percentage flow | Precision flow control with modified equal percentage characteristics. | Enhanced accuracy in flow management. |
Sour liquid/gas compliant materials | Meets NACE standards for handling corrosive fluids. | Safe for use with sour media. |
Easy ball seal maintenance | Accessible inspection without valve disassembly. | Reduced downtime and maintenance costs. |
One-piece valve body | Eliminates gaskets to improve structural integrity. | Fewer leak points, enhanced safety. |
ENVIRO-SEAL™ packing system | Smooth shaft surfaces for superior sealing. | Reduces leakage and extends service life. |
Segmented ball design | Offers a wide range of flow control with a 300:1 turndown. | Versatile for various flow rates and applications. |
Shearing action | Cuts through debris for reliable shutoff. | Ensures operational efficiency in challenging conditions. |
Sealing options | Available in metal and soft seats for different process conditions. | Flexibility for achieving reliable shutoff in various applications. |
Erosion-resistant design | Protects against body wall erosion in severe service conditions. | Extends valve life in harsh environments. |
Self-lubricating bearings | Reduces friction and torque. | Improves operational stability and reduces wear. |
Economical design | Lightweight, low torque, suitable for small actuators. | Cost-effective and easy to operate. |


What is a Segment Ball Valve?
Components of Segment Ball Valve
How Does a Segment Ball Valve Work?
A segment ball valve operates as a quarter-turn valve, similar to an eccentric plug valve. It uses a segmented ball with a V-notch to control the flow of fluids. The valve is equipped with two shafts: a driving shaft and a follower shaft. The driving shaft connects to one side of the segmented ball, while the follower shaft connects to the opposite side.
When the driving shaft rotates, it turns the segmented ball, which exposes the flow path through the V-notch. This V-notch design allows for precise control over fluid flow. At low valve travel, the small area of the V-notch provides a limited flow path, allowing for fine-tuned control. As the valve continues to open, the V-notch enlarges the flow area, enabling a greater range of fluid flow.
Segment ball valves typically feature two types of end connections for the body: flanged and flangeless connections. These connections provide versatility in installation, making the valve suitable for various applications.
Types of Segment Ball Valves
Features of Side Entry Segment Ball Valves:
- Easy Operation: The segment ball can move away from its seat without contact, resulting in low starting torque and smoother operation.
- Straight-Through Valve Body: When fully opened, the valve’s straight-through design allows the medium to flow in a linear path, reducing energy loss compared to other valve types.
- Double Eccentric Structure: This design ensures a perfect seal and tight closure, enhancing the valve’s performance.
- Anti-Scaling Performance: When closed, the valve’s shear force effectively removes foreign matter, making it resistant to scaling and buildup.
Features of Top Entry Segment Ball Valves:
- Easy and Quick Cleaning: The interior and piping parts can be cleaned efficiently without the need to remove the valve from the system.
- Simple Part Replacement: Worn-out parts can be replaced quickly and easily, minimizing downtime.
- No Internal Spare Parts: The valve’s design lacks spare parts inside the body, simplifying maintenance and reducing potential points of failure.
Selection of Segment Ball Valves
The housing material of a segment ball valve must match the controlled media. Brass is durable for non-corrosive media but unsuitable for salty water, acids, or chlorides. Stainless steel resists chemicals and heat but should avoid chlorides and certain acids. PVC handles corrosive fluids like acids and salty water but has lower temperature and pressure limits and is vulnerable to chlorinated and aromatic hydrocarbons.
The chosen segment ball valve must be capable of withstanding the maximum and minimum fluid pressures encountered during operation. The pressure rating is primarily determined by the material used for the housing. For example, stainless steel can endure higher pressures than PVC.
The temperature range a segment ball valve can handle depends on the materials used for the seal and housing. Brass is suitable for temperatures ranging from 20°C to 60°C. Stainless steel can operate within a broader temperature range, from -40°C to 220°C, while PVC is suitable for temperatures between -10°C and 60°C.
Depending on the application, the segment ball valve may need to meet specific standards and obtain approvals from regulatory bodies. This is particularly important for valves used in industries such as drinking water, food products, pharmaceuticals, or gas, where compliance with these standards ensures safety and suitability for the intended use.
Segment Ball Valve Actuators
Segment ball valves can be operated using various types of actuators, including manual, pneumatic, and electric actuators. These actuators allow for the opening and closing of the valve based on the system’s requirements.
This actuator is operated by hand. It features a handle that the operator manually turns to apply torque, which in turn rotates the valve mechanism, opening or closing the valve.
Rack and pinion pneumatic actuators in segment ball valves use compressed air to produce rotary motion, opening or closing the valve. They need clean, dry gas, usually from a central compressed air station, for proper function.
Electric actuators are used to control the opening and closing of segment ball valves. They provide either rotary or linear motion to operate the valve. As the name suggests, these actuators rely on electricity to function. The torque needed to open or close the valve is transmitted through a shaft, allowing for smooth operation of the valve.
- Paper and Pulp Industries: Used to regulate and control the flow of fluids in the production process.
- Chemical Plants: Ideal for controlling the flow of chemicals, providing reliable and precise control.
- Sewage Treatment Plants: Suitable for handling solid particles, making them effective in wastewater and sewage management systems.
- Power Industries: Used to manage the flow of heating and cooling fluids in power generation systems.
- Petroleum Industries: Can withstand exposure to flammable substances, making them essential for oil and gas applications.
- Pharmaceutical Industries: Regulate the flow of production compounds, ensuring accuracy in the manufacturing process.
- Food Industries: Favored for their ease of cleaning and low maintenance, making them suitable for food processing applications where hygiene is critical.
- High efficiency.
- These valves are simple in design.
- Small weight and volume.
- Easy to disassemble and repair.
- Have a perfect seal.
- They can provide low-pressure drop and high flow rates.
- Opens and closes quickly.
- Easy to clean.
- Cavities around the seat tend to cause blockage.
- When used in solid particles it can get eroded and thus start leaking fluid and failing.
Troubleshooting Segment Ball Valve
- Loose Gland Nuts: Tighten the loose gland nuts to stop leakage.
- Worn-Out Gland Packing: Replace the worn gland packing.
- Corroded or Scored Stem: Clean the stem or replace it along with the gland packing.
- Corroded Stuffing Box: Clean the stuffing box and replace the gland packing. If excessive corrosion is present, consider replacing the entire valve.
- Loose Nuts: Tighten the nuts to stop leakage.
- Damaged Gasket: Replace the gasket if it’s damaged.
- Corrosion or Damage in the Seal Area: Clean the corrosion or, depending on the severity of the damage, replace the plate or body.
- Segment Not Fully Closed: Adjust the actuator to fix the close limit travel.
- Misalignment Between Seat and Segment: Loosen the gland packing to center the segment, then tighten it again to maintain proper torque.
- Entrapped or Solidified Media: Clean the seat spring and sealing surfaces.
- Damaged Seal Seat: Replace the damaged seals.
- Damaged Segment or Seat: Replace the segment or seat if necessary.
- Over-Tightened Gland Nuts: Reduce torque to the recommended levels.
- Operating in Reverse: Loosen, realign, and retighten the liner retainer.
- Misaligned Actuator: Adjust and align the operator, then retighten the fasteners.
- Damaged Bearing: Replace the damaged bearing.
- Damaged Segment/Seat: Replace as needed.
- Accumulated Media: Clean the valve cavity, seat, and segment.
- Incorrect Installation: Reinstall the valve according to the flow indicator.
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Additional General Insights Here
Specs of Segment Ball Valve
Process Connection Type
Shutoff Class
Valve Size
Features of Segment Ball Valve
Efficient Design
The Segment Ball Valve design eliminates exposed line flange bolting, resulting in a cleaner and more streamlined installation process. This design reduces alignment and installation time, making the setup quicker and more efficient. NTVAL recommends that a secure valve installations and improved piping integrity provide a reliable solution for industrial applications.
HD Ball Seal Construction
The solid HD ball seal construction is engineered for longevity, especially in demanding environments. This feature allows the valves to withstand high-pressure and high-temperature conditions without compromising performance. I know you will agree that the durability of the HD ball seal contributes to the extended service life of the valve, offering a dependable solution for industries requiring strong and reliable valve performance.
Vee-Ball Design
The precise contouring of the Vee-Ball provides a modified equal percentage flow characteristic, allowing for accurate flow regulation. This feature is essential for processes requiring precise control over fluid dynamics. The Vee-Ball design supports a wide range of flow conditions, making it versatile for various industrial applications and establishing consistent and efficient flow management.
Benefits of Segment Ball Valve
Wide Range of Flow Rates
The segmented ball valve can control very low flow rates while also opening up to large flow rates, resulting in an impressive 300:1 turndown ratio. This versatility allows the valve to be used in a variety of applications, providing flexibility in flow control and supporting efficient operation across different process conditions. This wide range of flow rates makes it suitable for diverse industrial needs.
Reliable Shutoff
The segmented ball provides a shearing action as it moves through the seat, effectively cutting through debris and maintaining a reliable shutoff. For instance, this feature enhances the valve's ability to maintain a tight seal, even in challenging environments. The shearing action minimizes the risk of clogging and establishes consistent performance, which is crucial for maintaining process integrity and preventing leaks.
Versatile Seat Options
With metal, soft, and heavy-duty seat options, the Segment Ball Valves offer reliable tight shutoff for a variety of applications and process conditions. These seat options provide flexibility to match the specific needs of different industries. It all boils down to this: The choice of seat materials ensures compatibility with various fluids and operational environments, enhancing the valve's adaptability and effectiveness in different settings.
Applications of Segment Ball Valves
Petrochemical
Nuclear
Water and Sewage
Mining


3 Considerations When Buying a Segment Ball Valve
01
300:1 Turndown Ratio
02
Soft and Heavy-Duty Seats
03
NPS 1 to NPS 24, Flanged
FAQs About Segment Ball Valve
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