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Our Advantage:
We are a manufacturer, produce&sell ourselves
Fully support customer customized valves
MOQ：1 Piece
Accept OEM, ODM
What is fully welded ball valve?
A completely welded valve is created with a fully welded and forged body to lessen weight and enhance strength while getting rid of various possible leak spots. They are utilized to link and close off the movement of the substance in numerous pipeline systems.
Specifications:
Main Standard: API 6D/ISO 14313
Applications: Oil & Gas Transmission and distribution pipelines (also called fully welded pipeline ball valve), HIPPS, Heating supply
Application Standard: API 6D, ISO 14313, ASME VIII, ASME B16.34, ASME B16.10, ASME B16.5, NACE MR0175 and other diffused Industry standards
Size Range: Class 150: 2"-60", Class 300: 2"-48", Class 600: 2"-36"
Class 900: 2"-24", Class 1500: 2"-20", Class 2500: 2"-12"
Special Test: EN 10204 Type 3.2 Material Certification by a Thirty Parts, API 641 Fugitive Emissions, PMI, NDE test.
Body Construction:
The body utilizes forgings, which are available in a large array of materials, making the fully welded ball valve (welded body ball valve) well-suited for special applications as well as standard service. The body is made from three forged parts, and its all-welded construction has fewer leak paths than traditional ball valves. A cavity-relief valve is installed in the body to relieve any over pressurization encountered during service or testing. Integrity of sealing surfaces can be monitored without pressure in the pipeline by pressurizing the body cavity.
Welding Processes:
All welding processes for the body are suited to the materials of construction and are qualified and performed according to ASME Section IX. Non-destructive tests (NDTS) are performed per ASME VIII Division 1, App. 12 on the circumferential weld joints of the body. The compact shape of the body allows for the easy absorption of the bending loads coming from the pipeline.
Seat Seal:
The floating seats are free to move slightly along the longitudinal axis of the bi-directional valve. The initial seal at extremely low pressure differential, or vacuum conditions, is obtained through the force of the springs acting on the floating seats. Line pressure, behind the seat ring, supplements the seat spring load to force the seat tightly against the ball. The sealing is performed by PMSS seat to ball. The soft sealing between the seat and the ball is achieved by an elastomeric O-ring, plastic O-ring, or insert, depending on the service conditions. The seat seal is a soft polymeric seal. A secondary sealant injection system is provided for emergency seat sealing. In addition to the seat injection fittings, a check valve installed in the body prevents escape of the internal fluid.
Double Block-and-Bleed:
A single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces (ISO 14313/API 6D).
Double Piston Effect (DPE) Seat Design:
The seat design allows for both seats to seal with pressure acting from the same side of the valve. With line pressure in the body cavity, or in the event of one seat becoming damaged, the user has the added advantage of the opposite seat sealing.
The Benefits of Installing Fully Welded Ball Valves:
Leak-Free Valve Operation
This type of ball valve body is fully welded, which reduces the number of potential leak points. In fact, external leakage can be virtually eliminated in many cases. By enclosing the valve with welded metals instead of plastic seals, they become more durable and less likely to develop leaks over time.
fully welded ball valves
Wide Pressure & Temperature Ranges
With a valve seat made up of a carbonized Teflon seal ring and spring, fully welded ball valves are highly adaptable to changes in pressure and temperature—meaning there will be no slippage or performance issues within the specified temperature and pressure ranges. This quality makes these specialized ball valves incredibly versatile.
Superior Manufacturing & Quality Assurance
Each fully welded ball valve sphere is tracked and measured by an advanced computer scanner that detects even slight imperfections during the manufacturing process. When a rare defect is found, it returns to the machining room, where the issue is corrected, or the sphere is recycled. These precision machining practices lead to impeccably built ball valve spheres that you can depend on for years to come.
Pneumatic tank bottom ball valve
Identical Pipeline Construction Material
You can use a fully welded ball valve of the same material used in the pipeline. This consistent material use means there will be no uneven stress and no deformation caused by earthquakes or other vibrations over time. The valve will age at the same rate as the pipeline itself, which should be incredibly age-resistant in the case of quality sanitary valves.
Fully Welded Ball Valves with Partial Carbon Sealing
Fully welded ball valves are constructed with PCTFE seal rings that contain 25% carbon or greater, ensuring complete leak-free performance. This advanced material provides strength and stiffness while retaining its shape despite exposure to chemicals.
Directly Buried Ball Valves
Welded sanitary ball valves can be directly buried underground. There’s no need to build a large valve well; you only need a small shallow well, which significantly saves construction costs and time.
Adjustable Valve Stem Height & Valve Body Length
According to the construction and design requirements of the pipeline, the valve body’s length and the valve stem’s height can be adjusted to your specifications. This flexibility makes fully welded ball valves extremely versatile, as you can install them at multiple locations with different requirements.
Advantages:
The Fully Welded Ball Valve is designed to be strong yet lightweight, providing maximum resistance to pipeline pressures and stresses. Its compact spherical design eliminates the need for body flanges, reducing overall size and potential leak paths.
These valves are perfect for buried applications, minimizing potential leak points and decreasing the risk of fugitive emissions from flanges. WKTIPVF, a trusted manufacturer of Fully Welded Body Ball Valves in China, offers valves specifically designed for use in gas transmission and distribution pipelines, particularly for underground installations.
Stringent testing procedures are used to ensure the tightness of the entire ball valve, including visual, magnetic particle, ultrasonic, and optional radio graphic testing of weld seams. The trunnion-mounted design of the fully welded ball valve features high-strength forged stems placed in PTFE impregnated stainless steel bearings for smooth operation. This design absorbs thrust from line pressure, reducing friction between the ball and seats and keeping operating torque low even at full working pressure.
Fully Welded Ball Valves for Heating and Fuel Gas Systems:
The following list describes the features of fully welded ball valves used in various heating and gas processing applications.
In most gas systems, ball valves use a fixed shaft and a completely welded structure to prevent leaks.
Fully welded ball valves are made from fully forged material to create a lightweight, strong, and maintenance-free valve body that can last up to 30 years.
The double block and bleed valve (DBB) allows for venting and discharge of the valve chamber when fully open or closed, making them ideal for pipeline systems that need frequent venting and pressure relief.
There are two types of valve seat designs:
1, The single piston effect (standard) provides self-discharge of over-pressured valve cavities.
2, The double piston effect offers a double seal barrier.
Fully welded ball valves used in heating and gas systems have low torque, making them easy to operate.
These valves are also beneficial in systems with fire safety measures in place. Welded ball valves are tested for fire resistance according to API, 6FA, and API607 standards.
Our Advantage:
We are a manufacturer, produce&sell ourselves
Fully support customer customized valves
MOQ：1 Piece
Accept OEM, ODM
What is fully welded ball valve?
A completely welded valve is created with a fully welded and forged body to lessen weight and enhance strength while getting rid of various possible leak spots. They are utilized to link and close off the movement of the substance in numerous pipeline systems.
Specifications:
Main Standard: API 6D/ISO 14313
Applications: Oil & Gas Transmission and distribution pipelines (also called fully welded pipeline ball valve), HIPPS, Heating supply
Application Standard: API 6D, ISO 14313, ASME VIII, ASME B16.34, ASME B16.10, ASME B16.5, NACE MR0175 and other diffused Industry standards
Size Range: Class 150: 2"-60", Class 300: 2"-48", Class 600: 2"-36"
Class 900: 2"-24", Class 1500: 2"-20", Class 2500: 2"-12"
Special Test: EN 10204 Type 3.2 Material Certification by a Thirty Parts, API 641 Fugitive Emissions, PMI, NDE test.
Body Construction:
The body utilizes forgings, which are available in a large array of materials, making the fully welded ball valve (welded body ball valve) well-suited for special applications as well as standard service. The body is made from three forged parts, and its all-welded construction has fewer leak paths than traditional ball valves. A cavity-relief valve is installed in the body to relieve any over pressurization encountered during service or testing. Integrity of sealing surfaces can be monitored without pressure in the pipeline by pressurizing the body cavity.
Welding Processes:
All welding processes for the body are suited to the materials of construction and are qualified and performed according to ASME Section IX. Non-destructive tests (NDTS) are performed per ASME VIII Division 1, App. 12 on the circumferential weld joints of the body. The compact shape of the body allows for the easy absorption of the bending loads coming from the pipeline.
Seat Seal:
The floating seats are free to move slightly along the longitudinal axis of the bi-directional valve. The initial seal at extremely low pressure differential, or vacuum conditions, is obtained through the force of the springs acting on the floating seats. Line pressure, behind the seat ring, supplements the seat spring load to force the seat tightly against the ball. The sealing is performed by PMSS seat to ball. The soft sealing between the seat and the ball is achieved by an elastomeric O-ring, plastic O-ring, or insert, depending on the service conditions. The seat seal is a soft polymeric seal. A secondary sealant injection system is provided for emergency seat sealing. In addition to the seat injection fittings, a check valve installed in the body prevents escape of the internal fluid.
Double Block-and-Bleed:
A single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces (ISO 14313/API 6D).
Double Piston Effect (DPE) Seat Design:
The seat design allows for both seats to seal with pressure acting from the same side of the valve. With line pressure in the body cavity, or in the event of one seat becoming damaged, the user has the added advantage of the opposite seat sealing.
The Benefits of Installing Fully Welded Ball Valves:
Leak-Free Valve Operation
This type of ball valve body is fully welded, which reduces the number of potential leak points. In fact, external leakage can be virtually eliminated in many cases. By enclosing the valve with welded metals instead of plastic seals, they become more durable and less likely to develop leaks over time.
fully welded ball valves
Wide Pressure & Temperature Ranges
With a valve seat made up of a carbonized Teflon seal ring and spring, fully welded ball valves are highly adaptable to changes in pressure and temperature—meaning there will be no slippage or performance issues within the specified temperature and pressure ranges. This quality makes these specialized ball valves incredibly versatile.
Superior Manufacturing & Quality Assurance
Each fully welded ball valve sphere is tracked and measured by an advanced computer scanner that detects even slight imperfections during the manufacturing process. When a rare defect is found, it returns to the machining room, where the issue is corrected, or the sphere is recycled. These precision machining practices lead to impeccably built ball valve spheres that you can depend on for years to come.
Pneumatic tank bottom ball valve
Identical Pipeline Construction Material
You can use a fully welded ball valve of the same material used in the pipeline. This consistent material use means there will be no uneven stress and no deformation caused by earthquakes or other vibrations over time. The valve will age at the same rate as the pipeline itself, which should be incredibly age-resistant in the case of quality sanitary valves.
Fully Welded Ball Valves with Partial Carbon Sealing
Fully welded ball valves are constructed with PCTFE seal rings that contain 25% carbon or greater, ensuring complete leak-free performance. This advanced material provides strength and stiffness while retaining its shape despite exposure to chemicals.
Directly Buried Ball Valves
Welded sanitary ball valves can be directly buried underground. There’s no need to build a large valve well; you only need a small shallow well, which significantly saves construction costs and time.
Adjustable Valve Stem Height & Valve Body Length
According to the construction and design requirements of the pipeline, the valve body’s length and the valve stem’s height can be adjusted to your specifications. This flexibility makes fully welded ball valves extremely versatile, as you can install them at multiple locations with different requirements.
Advantages:
The Fully Welded Ball Valve is designed to be strong yet lightweight, providing maximum resistance to pipeline pressures and stresses. Its compact spherical design eliminates the need for body flanges, reducing overall size and potential leak paths.
These valves are perfect for buried applications, minimizing potential leak points and decreasing the risk of fugitive emissions from flanges. WKTIPVF, a trusted manufacturer of Fully Welded Body Ball Valves in China, offers valves specifically designed for use in gas transmission and distribution pipelines, particularly for underground installations.
Stringent testing procedures are used to ensure the tightness of the entire ball valve, including visual, magnetic particle, ultrasonic, and optional radio graphic testing of weld seams. The trunnion-mounted design of the fully welded ball valve features high-strength forged stems placed in PTFE impregnated stainless steel bearings for smooth operation. This design absorbs thrust from line pressure, reducing friction between the ball and seats and keeping operating torque low even at full working pressure.
Fully Welded Ball Valves for Heating and Fuel Gas Systems:
The following list describes the features of fully welded ball valves used in various heating and gas processing applications.
In most gas systems, ball valves use a fixed shaft and a completely welded structure to prevent leaks.
Fully welded ball valves are made from fully forged material to create a lightweight, strong, and maintenance-free valve body that can last up to 30 years.
The double block and bleed valve (DBB) allows for venting and discharge of the valve chamber when fully open or closed, making them ideal for pipeline systems that need frequent venting and pressure relief.
There are two types of valve seat designs:
1, The single piston effect (standard) provides self-discharge of over-pressured valve cavities.
2, The double piston effect offers a double seal barrier.
Fully welded ball valves used in heating and gas systems have low torque, making them easy to operate.
These valves are also beneficial in systems with fire safety measures in place. Welded ball valves are tested for fire resistance according to API, 6FA, and API607 standards.
