API 6D Ball Valve

API 6D Ball Valve are Designed for Reliable Tight Sealing Capability and Safety Usage.  Available in Trunnion Mounted Design and floating Ball Design. Suitable for Delivery of Fluid in Large Diameter and Long-distance Pipeline.

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  • API-6D-Ball-Valve-Cast-Floating
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  • API-6D-Ball-Valve-Forged
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  • Construction – Split Body, Floating/Trunnion Ball
  • Body Material – A351 CF8M/CF8/CF3, A216 WCB, A352 LCB/LCC
  • Ball Material – A350 LF2 with ENP coating for extra hardness
  • Seat – Soft or Metal to Metal
  • Size Range – DN50-DN600
  • End Connection – Flange, BW, SW
  • Pressure Rating – Class 150-1500
  • Standard – Design to API6D, Flange Dimension to ASME B16.5, Butt Welding to ASME B16.25, Face to face meets ASME B16.10, API6D, Inspection and testing according to API598 API6D
  • Temperature Rage – -40°F – 650°F

What is an API 6D Ball Valve

API 6D ball valves are designed and made following the specification of the American Petroleum Institute for pipelines. Kinvalve API 6D ball valve regulates the transportation of fluid in long-distance pipeline sectors such as petrochemical, oil processing, power plants, refining, chemical industry, etc.

API 6D ball valves are made from durable and strong materials, this valve ensures efficient gas flow. It is carefully built with seats, stems, a bonnet, a handwheel or actuator, and other components.  Thus, you can guarantee that these valves provide a high-performance and durable function for years to come.

Whether you require a floating ball API 6D ball valve or a trunnion mounted API 6D ball valve a side-entry or top-entry API 6D ball valve, we can manufacture the right product for you. All API 6D ball valves we supply provide the zero leakage.

At Kinvalve, we produced standard API 6D ball valves in a comprehensive range of pressure ratings, sizes, designs, and valve materials. Whether you need stainless steel or carbon steel, we can create exactly what you specify.

All body and bonnet materials and trims are available according to your requirements. These API 6D valves can be provided in class 150-2500 pressure ratings, 2 inches to 24 inches size range, in full port or reduced port design. Custom sizes, designs, materials, and finishes are also welcome to suit your needs.

Versatile API 6D Ball Valves

API 6D ball valves are designed in heavy-duty bodies for reliability and high-performance, and born for the most demanding application conditions.

  • API-6D-Ball-Valve-Top-Entry

    Top-Entry API 6D ball valves are efficient for convenient maintenance inline while the side-entry ball valves or unibody ball valves are affected. Top-entry ball valve can be soft seated or metal seated construction, with floating or trunnion mounted balls.

  • Trunnion API 6D Ball Valve
    Trunnion API 6D Ball Valve

    Trunnion mounted API 6D ball valves are effective in both low- and high-pressure applications by equipping spring-loaded seats. Optional Soft and metal to metal seats for high temperature and severest conditions like abrasive, corrosive mediums.

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    Floating API 6D Ball Valve

    API 6D floating ball valves are produced for the strictest industrial specifications. Kinvalve provides the API 6D floating ball valves made of casting bodies and forged bodies suitable for the pressure rating from Class 150 to 1500, with soft or metal to metal seals.

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    Fully Welded API 6D Ball Valve

    Fully welded ball valves are designed according to API 6D specifications. Fully welded ball valve is a type of pipeline ball valve, which includes valve seats and sealing components through a fully welded forged valve body, ensuring safe and leak free use.


API 6D ball valves are widely used in the power, oil & gas and petrochemical industrial field due to their excellent design and unparalleled performance, as well as various customizable structures and configurations.

  • Petrochemical Industry

    API 6D Ball Valve with durable metallic structure prevents corrosion and resists turbulent conditions

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    Oil & Gas Industry

    Tailor-made LNG API 6D ball valve solutions are based on industry requirements.

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    Wastewater Treatment Industry

    The metal to metal designed API 6D ball valves can provide a variety of materials and spraying processes to meet the corrosion and wear resistance requirements of acidic substances and solid particles in wastewater media.

Why You Use an API 6D Ball Valve

Enhanced Sealing Capability

Kinvalve API 6D ball valves have the unparalleled sealing tightness because of their unique structures. The floating ball design makes zero leakage a well-known synonym. And you will also benefit from the spring-loaded seat with a fixed ball, making API 6D ball valves perfect for low- and high-pressure scenarios.

Remarkable Passing Ability

Efficient flow control is vital for maintaining the performance of water treatment and distribution systems. The full bore designed API 6D ball valve features unrestricted flow to minimize pressure drop and energy loss. The superior passing ability

durable API 6D Ball Valve
Durable Service

The soft seated and metal seated designed API 6D ball valves enable them to apply to almost all fluids. Whether it is the sewage treatment industry with abrasive materials or corrosive seawater, they are durable to face it calmly.


At Kinvalve, you can customize the API 6D ball valves from unibody to split bodies, from floating ball to trunnion mounted ball, from soft seated to metal seated design, from side-entry to top-entry, as well as the optional materials for the body and trims to meet your requirements.

Main Components

Handwheel/actuator – The handwheel is used to manually operate the valve while the actuator is used to automate the valve remotely.

Valve body – houses all the valve components. Made of forged or cast steel.

Bonnet – Cover the stem and the stem packing seals. Bolted to the body.

Stem – Used to connect the ball to the actuator/handwheel. Responsible for rotating the ball or closing/opening the valve.

Seats – Provide a tight seal for the ball and the valve body. Made of soft seats or metal seats. An injection system for lubrication, flushing, or emergency sealing for 4” or larger sizes.

Ball – Main parts of the valve in charge of regulating the gas or fluid transportation. Customized coating with extra hardness for anti-corrosion, wear-resistance and prolong service life.

Packing – Placed around the stem inside the bonnet to prevent leakage. A multiple-level barrier with O-rings and V-packing, with injected inlets for lubrication, flushing, or emergency sealing designed for 6” or larger sizes.



  • API 6D and NACE Compliant
  • Anti-blowout Stem
  • Fire Safe Certified
  • Anti-static Devices
  • Enhanced Sealing Capabilities
  • Easy to Clean and Maintain
  • Fully Welded According to Your Needs
  • Secondary Sealing (grease injection)
  • Double Block and Bleed Features as Per Request
  • SPE single piston effect – unidirectional seat
  • Designed for High-pressure and High-temperature Industries

What Makes Kinvalve Unique on API 6D Ball Valves


As a valve prepared for the most severe operating conditions, we need to ensure the perfection of all components, both surface and internal.


As an ISO Certified manufacturer, we will follow all necessary standard measures to ensure that our API 6D ball valves do not cause you any trouble.

API 6D Ball Valve

API specification 6D are specially fabricated ball valves for oil and gas pipe line systems. The American Petroleum Institute clearly defines the performance of these ball valves when it comes to structure, design, fabrication, and testing.

API 6D Ball Valve
API 6D Ball Valve

API 6D Ball Valve Classification

Top-Entry API 6D Ball Valve

This type only allows access to the ball and stem from the top. This makes maintenance and repair easy since there’s no need to remove the valve from the pipeline.

Top entry API 6D Ball valve
Top entry API 6D Ball Valve

Side-Entry API 6D Ball Valve

The ball and stem here are accessible from the side finding use with limited top access. They, however, still make for uncomplicated maintenance and repair.

Side Entry API 6D Ball Valve
Side Entry API 6D Ball Valve

Welded Body API 6D

This has a fully welded body construction usually consisting of one continuous material piece. The end connections are typically directly welded to the valve body e.g. flanges and weld ends.  Usually, the result is a strong, integral structure with no external bolting or connections.

Full Welded Body API 6D
Full Welded Body API 6D

Manual API 6D Ball Valve

This type is operated manually via a handle or lever used where human intervention is required for fluid flow control. Opening or closing of the valve is by turning the handle which rotates the ball within the valve.

Manual API 6D Ball Valve
Manual API 6D Ball Valve

Actuated API 6D Ball Valve

These are equipped with an electric, pneumatic or hydraulic actuator allowing automated operation. This allows for precise control of fluid flow through a pipeline system without manual intervention.

They can feature a manual override as well as a remote control.

Actuated API 6D Ball Valve
Actuated API 6D Ball Valve

Installation of API 6D Ball Valve

API 6D Ball Valve Components
API 6D Ball Valve Components

Manufacturers usually have specific installation instructions which you need to follow.  The installation process typically involves the following steps:

  • Clean the pipe ends by removing any foreign matter that could interfere with the valve’s sealing surfaces.
  • Determine the correct orientation of the valve by following the manufacturer’s recommendations.
  • Where you have flanged ends, align the bolt holes with those of the pipeline using appropriate gaskets and fasteners.
  • For butt/socket-weld ends, follow proper welding procedures ensuring the welds are defect-free and high quality.
  • Install the actuator according to the manufacturer’s instructions properly aligning it and securely attaching it to the valve.
  • Check the seats with the valve fully open ensuring there’s no damage, dirt, or debris.
  • Test to see if the valve can open and close without any difficulty. Flush the pipeline system to remove any debris and conduct a pressure test to check for leaks.
  • Finally configure the valve in the desired configuration (open or closed) based on the system requirements.

Operation of API 6D Ball Valve

The operation of an API 6D ball valve involves controlling fluid flow through a pipeline by opening or closing the valve. An operation can be manual or automated as follows:

Manual Operation

Here, the API 6D ball valves are operated by a person via a handle or lever. To open the valve, one turns the handle 90 degrees from the closed position. This rotates the ball inside the valve, allowing fluid to flow through the bore.

Automated Operation

Automated API 6D balls are equipped with an actuator that controls the operation of the valve. A control signal is sent to the actuator specifying whether the valve should be opened or closed. The actuator responds by moving the valve stem and ball as desired.

Materials Used in API 6D Ball Valve

Various materials are used in the manufacture of different components that make up the API 6D ball valves. The material used is determined by the application, environmental considerations, fluid being handled, pressure, and temperature conditions.

Some of these materials include:

  • Carbon Steel: Utilized for less corrosive applications with lower temperature and pressure requirements.
  • Stainless Steel: It is a popular material thanks to its corrosion resistance and durability.
  • Alloy Steel: Offers higher strength and temperature resistance than carbon steel.
  • Brass: Applicable where corrosion resistance is desired in systems with relatively low pressures.
  • Monel: This is an alloy of nickel and copper that exhibits excellent corrosion resistance.
  • Titanium: Used in applications requiring high strength and excellent corrosion resistance.
  • Inconel: This is another nickel alloy that displays superior corrosion resistance and high-temperature performance.

Maintenance of API 6D Ball Valve

Maintenance activities ensure your API 6D ball valves offer continued performance reliability by monitoring issues like leaks and wear. Some key maintenance practices include:

  • Regular inspection to identify signs of leakage, wear, or damage.
  • Lubrication of the stem and stem packing for smooth operation and curbing corrosion.
  • Cleaning the valve and its components to remove dirt and other debris that can affect sealing and valve operation.
  • Regular functional testing to ensure the API 6D ball valves open and close effortlessly and verify the valve’s sealing integrity.
  • Replace seats and seals over time accounting for wear and/or damage that could result in leakages if unaddressed.
  • Periodically check and tighten loose connections like flange bolts to properly secure them and maintain a leakage-free seal.

Troubleshooting API 6D Ball Valve

The troubleshooting process involves identifying and addressing issues that may arise when operating an API 6D ball valve. Some common troubleshooting issues are mentioned below:

Failure of Fluid to Flow

A common cause for this is blockage indicating a foreign object present in the valve.

Ball Seat Leakage

A damaged seat can result in leakage and can be caused by a foreign object or thermal expansion inside the ball cavity. Leaving the seat in a throttled position can also damage the seat as well as excessive pressure in the system.

Leakage in the ball seat can also be caused by installing a unidirectional valve in the wrong direction. Using improper set material can also result in leakage.

Leaking Body Gasket

Such leakage can result from inadequate bolting torque and high piping stress on the body bolts. Body cavity over-pressurization can also damage the gasket resulting in leakage.

Gland Packing Leakage

When the gland bolts are left loose and not tightened, they can cause leakage. The packing can also wear out or be damaged from heat cycling. Leakage can also result from cavity over-pressurization.

Inoperable Manual Valve

When the valve cannot be operated, it is usually down to the presence of a foreign object within it. Additionally, wearing of the seat and having powdery material may cause the same issue.

Inoperable Automated Valve

For an automated API 6D ball valve, failure to operate the valve can arise from inadequate air pressure or compressor issues. Other causes include a defective filter regulator, broken or clogged air tubing, faulty speed controller, and worn actuator O-ring.

For all your high-quality API 6D ball valves, Kinvalve offers a perfect solution for all your needs – contact us now.

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