Trusted Segment Ball Valve Manufacturer

NTVAL offers durable Segment Ball Valves for demanding industrial applications. Known for precise flow control and easy maintenance, our valves excel under extreme conditions. Trust NTVAL for efficient, long-lasting valve solutions for your projects.

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.

Segment Ball Valve 1

Quality Control

Segment Ball Valve 2
The PMI test checks if the segment ball valve is made from the correct metals by identifying the material using special tools.
PMI Test
Segment Ball Valve 3
We conduct a sealing test to check if the segment ball valve holds pressure without leaks, making sure it operates correctly.
Sealing Test​
Segment Ball Valve 4
In the low emission test, we measure if gas or vapor escapes from the segment ball valve to prevent harmful environmental leaks.
Low Emission Test​
Segment Ball Valve 5
The impact test checks how well the segment ball valve withstands force, helping determine if it can handle sudden impacts safely.
Impact Test​
Segment Ball Valve 6
We measure the segment ball valve to confirm all parts match the design, making sure they fit together for proper operation.
Dimension Inspection​
Segment Ball Valve 7
This test measures the thickness of the protective paint on the valve, which helps prevent rust and damage from external elements.
Painting Thickness Test​
Segment Ball Valve 8
PT, or penetrant testing, reveals tiny cracks in the valve’s surface using dye to identify hidden flaws or weaknesses in the material.
PT
Segment Ball Valve 9
During material inspection, we review the quality of the metals used, establishing only strong and durable materials are in the valve.
Material Inspection​

Our Valve Applications in Key Industries

Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.
Segment Ball Valve 10
The segment ball valve helps control the flow of harsh chemicals safely and reliably, making it ideal for chemical plants.
Chemical Processing
Segment Ball Valve 11
In the petrol chemical industry, segment ball valves handle high-pressure fluids with precision, reducing leaks and improving overall efficiency.
Petrol Chemical
Segment Ball Valve 12
Segment ball valves are critical in nuclear plants, where they handle high temperatures and radioactive materials safely, protecting the environment.
O.P.G & Nuclear
Segment Ball Valve 13
Segment ball valves efficiently manage the thick liquids used in pulp production, helping maintain smooth operations in paper manufacturing.
Pulp
Segment Ball Valve 14
In mining, segment ball valves control abrasive slurries and rough materials, offering durability and long-lasting performance in tough environments.
Mining
Segment Ball Valve 15
Segment ball valves provide reliable flow control in water treatment plants, establishing clean water distribution and effective sewage management.
Water & Sewage
Segment Ball Valve 16
Segment ball valves manage high-temperature steam, making them perfect for systems that require precise control and long-lasting durability.
Steam System
Segment Ball Valve 17
In boiling systems, segment ball valves regulate pressure and temperature, making sure the system runs smoothly and maintains safety.
Boiling System

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Specifications

  • 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 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
  • 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 Range: -50°F to +500°F (-46°C to +260°C)
  • Maximum Allowable Operating Pressure: ASME Class 150, 300, 600
  • 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: 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
  • 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.
Segment Ball Valve 24

Features & Benefits

Segmented control ball valves offer a versatile solution for throttling and on-off applications, combining the strengths of knife gate, globe, and ball valves. Their strong design, with advanced features such as corrosion resistance and precise flow control, makes them ideal for demanding industrial applications. Below is a summary of the key features and benefits:
FeatureDescriptionBenefits
Eliminates exposed flange boltingReduces installation time and enhances piping integrity.Easier installation and secure valve fittings.
Solid HD ball sealDurable construction for long service life.Reliable in harsh environments.
Vee-Ball with equal percentage flowPrecision flow control with modified equal percentage characteristics.Enhanced accuracy in flow management.
Sour liquid/gas compliant materialsMeets NACE standards for handling corrosive fluids.Safe for use with sour media.
Easy ball seal maintenanceAccessible inspection without valve disassembly.Reduced downtime and maintenance costs.
One-piece valve bodyEliminates gaskets to improve structural integrity.Fewer leak points, enhanced safety.
ENVIRO-SEAL™ packing systemSmooth shaft surfaces for superior sealing.Reduces leakage and extends service life.
Segmented ball designOffers a wide range of flow control with a 300:1 turndown.Versatile for various flow rates and applications.
Shearing actionCuts through debris for reliable shutoff.Ensures operational efficiency in challenging conditions.
Sealing optionsAvailable in metal and soft seats for different process conditions.Flexibility for achieving reliable shutoff in various applications.
Erosion-resistant designProtects against body wall erosion in severe service conditions.Extends valve life in harsh environments.
Self-lubricating bearingsReduces friction and torque.Improves operational stability and reduces wear.
Economical designLightweight, low torque, suitable for small actuators.Cost-effective and easy to operate.
A. Erosion Resistant Downstream Liners/Seats
Reverse flow direction prevents body wall erosion due to high velocities at low openings.
 
B. Severe Service Coatings
Customized ultra-hard coatings provide application-specific corrosion and erosion resistance for valve internals.
 
C. Bearing Seals
Protects metal bearings from ingress of media.
 
D. Pressure Balanced Seat Design
Seats capable of sealing under full differential pressures with low torques and smooth operation.
 
E. Easy Maintenance
Flanged retainer with uninterrupted gasket surface provides easy access for seat and liner replacement.
 
F. Trim Options
Multiple options available for optimized performance in various levels of erosive services.
Segment Ball Valve 25
Segment Ball Valve 26

What is a Segment Ball Valve?

A segment ball valve is a type of ball valve distinguished by a V-notch contour segment within the ball. This design allows for precise control, excellent rangeability, and effective shutoff capability. Segment ball valves are capable of delivering high-capacity, non-clogging flow control.
 
Manufacturers like NTVAL design the V-notch ball with special contours to enhance both capacity and seal life, ensuring reliable shutoff performance.
 
These valves are known for their high performance and cost-effectiveness, available in a range of sizes from small, lightweight models to large, heavyweight versions. The lightweight segment ball valves are easy to mount and handle, making them ideal for less demanding applications.
 
In contrast, the heavyweight versions are designed for use in harsh environments, where they provide optimized control and on/off functionality.
 
Due to their durability and reliability, segment ball valves are widely used in various industries, including the paper and pulp industry, refineries, and petrochemical services. Their robust design makes them a dependable choice even in challenging environments.

Components of Segment Ball Valve

Valve Housing
The valve housing encloses all the internal components of the segment ball valve. It is typically constructed from rigid and durable materials, such as thermoplastic-lined metallic materials or thermoplastics, to protect the internal components. The housing also allows external components to access the control mechanism, enabling the rotation of the ball to open or close the flow.
Segment Ball
The segment ball is a V-shaped contoured ball that serves as the primary opening through which fluid flows. This component provides shearing action, which results in precise flow characteristics.
Shafts
The shafts connect the segment ball to the valve’s control mechanism, facilitating the rotation of the segmented ball. They are equipped with packing rings and O-rings that help seal the shaft, along with a bonnet that prevents leakage. The shafts can be operated manually or through pneumatic or electric actuators.
Seat
The seat is responsible for creating a seal between the segment ball and the valve body, ensuring proper closure and preventing leaks.
Bearing Seals
Bearing seals protect the metallic bearings within the valve from fluid ingress, helping to maintain smooth operation and extending the valve’s lifespan.

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

Side Entry Segment Ball Valve
The side entry segment ball valve is designed for high performance and is based on the O-type ball valve structure. This type of valve is particularly suited for conveying solid-gas and solid-liquid two-phase mediums, making it ideal for controlling the flow of solids and liquids or gases and solids.
 

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.
Top Entry Segment Ball Valve
The top entry segment ball valve is ideal for industries like pharmaceuticals, chemicals, and food processing, where superior and rapid cleaning is essential. This type of valve offers several advantages that make it a preferred choice in applications requiring high levels of cleanliness.
 

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

Type of Operation
When selecting a segment ball valve, it is essential to choose the appropriate actuator mechanism, whether manual, pneumatic, or electric, based on the available power source and required torque. Pneumatic actuators provide high torque, while electric actuators have a higher upfront cost but lower operating expenses.
Housing Material

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.

Pressure Rating

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.

Working Temperatures

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.

Standards and Approvals

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.

Manual Segment Ball Valve Actuator

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 Actuator

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 Actuator

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.

Applications of Segment Ball Valves
  • 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.
Advantages of Segment Ball Valves
  • 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.
Disadvantages of Segment Ball Valves
  • 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

Gland Packing Leakage
  • 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.
Leakage on the Bottom Plate Gasket
  • 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.
Through Bore Leaking Fluid
  • 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.
High Segment Ball Valve Torque
  • 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

These Segment Ball Valves feature a flanged process connection type, providing secure and reliable installation. Flanged connections offer excellent sealing capabilities, reducing the risk of leaks, and are compatible with various industrial piping systems. On top of that, this connection type allows for easy integration and maintenance in complex setups.

Shutoff Class

The Segment Ball Valves are available in Class III, Class IV, and Class VI shutoff classes according to the FCI 70-2 standard. These classifications indicate the valve’s ability to provide tight shutoff in different applications. For instance, class III offers moderate shutoff capabilities, while Class IV and VI provide increasingly tighter shutoff performance, making them suitable for a wide range of industrial uses.

Valve Size

These valves come in various sizes to accommodate different flow requirements, ranging from NPS 1 to NPS 24, including intermediate sizes like NPS 1-1/2 and NPS 2, up to NPS 10 and beyond. At NTVAL, the valve size standard includes both NPS (Nominal Pipe Size) and DN (Diameter Nominal) options, allowing these valves to meet specific needs for various industrial applications.

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

In the petrochemical industry, Segment Ball Valves play a vital role in controlling the flow of various chemicals and hydrocarbons. Their reliable shutoff capabilities facilitate the safe handling of hazardous materials. The strong construction of these valves withstands the harsh conditions typical of petrochemical processes, while precise flow control helps maintain efficient and safe operations.

Nuclear

Segment Ball Valves are used in nuclear applications due to their ability to handle high pressure and temperature conditions. Secure and reliable shutoff is crucial for maintaining safety standards in nuclear facilities. NTVAL suggests that these valves’ precision flow control is essential for managing the complex processes involved in nuclear energy production.

Water and Sewage

For water and sewage systems, Segment Ball Valves provide effective flow control and reliable shutoff. These valves are designed to handle various flow rates, making them suitable for different stages of water treatment and sewage management. What’s even better is their ease of maintenance makes them an ideal choice for long-term use in municipal and industrial water systems.

Mining

In mining, Segment Ball Valves control the flow of slurry and other abrasive materials. Their ability to handle these tough conditions, along with their long-lasting performance, makes them a popular choice in mining operations where durability and reliability are critical.
Segment Ball Valve 27
Segment Ball Valve 28

3 Considerations When Buying a Segment Ball Valve

01

300:1 Turndown Ratio

These valves offer a modified equal percentage flow characteristic, making them ideal for applications requiring precise flow control. A high turndown ratio, such as 300:1, indicates the valve’s capability to control a wide range of flow rates, which is crucial for applications encountering both very low and very high flow rates.

02

Soft and Heavy-Duty Seats

Choosing the right material for the valve body and seats depends on the process fluids and conditions. Segment Ball Valves are available with metal, soft, and heavy-duty seat options. At NTVAL, metal seats provide durability and high-temperature resistance, while soft seats offer excellent sealing for lower temperature applications.

03

NPS 1 to NPS 24, Flanged

Selecting the appropriate valve size and connection type is essential for seamless integration into your system. Segment Ball Valves come in sizes ranging from NPS 1 to NPS 24. Matching the valve size to your pipeline dimensions is important. Additionally, flanged connections provide easy installation and maintenance, ensuring the valve fits well within your system.

FAQs About Segment Ball Valve

Yes. At NTVAl, each Segment Ball Valve is delivered with a 3.1 certificate at no extra cost. The certificate will be sent for your approval before delivery to ensure you have all the necessary documentation.
The general guarantee period is 18 months from the delivery date, ensuring your Segment Ball Valves are covered for any quality issues that may arise.
Segment Ball Valves are certified by ISO9001, ISO14001, ISO45001, API6D, API607, among others. These certifications guarantee that the valves meet high standards of quality, environmental management, and safety.
Our team offers comprehensive after-sales support, including technical assistance for troubleshooting, guidance on valve operation, and solutions to any problems encountered. Replacement parts or new valves can be sent if needed, with repairs or replacements available within the warranty period.

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