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Introducing the Cast Steel CF8 DN80 PN16 RF Flange Globe Valve, a professional-grade product designed to meet your industrial needs. This valve boasts a range of features that ensure optimal performance and reliability.
Nominal Diameter: DN80
Bore: Full Bore
Nominal Pressure: PN16
Material: CF8
Operation: Handwheel
Design Standard: API602/API 623
Test/Inspection: API598
End Connection: RF Flange
Flange standard: ASME/ANSI B16.5
Top Flange: ISO5210 /ISO5211
Choose the Cast Steel CF8 DN80 PN16 RF Flange Globe Valve for a professional-grade solution that offers exceptional performance, reliability, and ease of use.
What Is a Globe Valve?
A globe valve, unlike a ball valve, is a type of valve that is used to control the flow in a pipeline. It consists of a movable plug or disc and a stationary ring seat in a generally round body.
Globe valves get their name from their round body shape, which is divided into two halves by an internal barrier. This barrier has an opening that creates a seat where a movable plug can be screwed in to close the valve. The plug is also known as a disc. In globe valves, the plug is connected to a stem that is operated by a screw mechanism using a handwheel in manual valves. Typically, automated globe valves have smooth stems instead of threaded ones and are opened and closed by an actuator assembly.
How Do Globe Valves Work?
Globe valves belong to the category of shut-off valves and are often mistaken for ball valves, although they possess distinct characteristics. Their purpose is to regulate the flow of water within a pipeline. These valves comprise a movable plug or disc-like component and a fixed ring seat, usually enclosed within a spherical body, hence the name "globe." The plug is linked to a stem that is controlled by a screw-like mechanism. In contrast, automatic globe valves employ sleek stems instead of threaded ones, alongside an actuator assembly.
Internal parts of a typical globe valve
The valve's body is the primary structure that holds the pressure and is easily recognizable as it constitutes the majority of the valve. It encompasses all the internal components of the valve that will interact with the substance being regulated. The bonnet is linked to the body and ensures that the fluid, gas, or slurry being controlled remains contained.
Globe valves are commonly two-port valves, although there are also three port valves available, mostly in a straight-flow setup. Ports serve as openings in the valve body for fluid to enter or exit. The two ports can be positioned directly across from each other, anywhere on the body, or at an angle, like 90°, which are known as angle globe valves. Globe valves are primarily used for fluids that are corrosive or have high viscosity and tend to solidify at room temperature. This is because straight valves are designed in a way that the outlet pipe aligns with the inlet pipe, allowing the fluid to remain in place in horizontal piping. On the other hand, angle valves direct the outlet pipe downwards, enabling the fluid to drain off. Consequently, this prevents the valve components from getting clogged or corroded over time.A globe valve may also feature a "Y" shaped body. This design enables a straight construction at the bottom, unlike other valves that typically have a pot-like structure for the bottom seat. Consequently, the fluid can flow smoothly through the valve, reducing the chances of clogging or corrosion over time.
Bonnet: where frequent inspection or maintenance is required, as it allows for easy disassembly. Bolted bonnet, on the other hand, provides a more secure and robust closure, making it suitable for high-pressure or high-temperature applications. The bonnet, regardless of its type, ensures that the valve body remains tightly sealed, preventing any leakage.
Plug or disc: The valve's closure component, known as plugs, are connected to the stem and can be moved up or down to regulate the flow. Plugs come in two types: balanced and unbalanced. Unbalanced plugs are solid and are suitable for smaller valves or when there is low pressure difference across the valve. They offer a simpler design with only one potential leakage point at the seat, and are usually more cost-effective. However, their size is limited, as larger unbalanced plugs require impractical amounts of force to seal and control the flow. On the other hand, balanced plugs have holes drilled through them. This design allows for easier shut off since the plug doesn't have to overcome static forces. However, it also creates a second potential leakage path between the plug and the cage, and generally comes at a higher cost.
Stem: The stem acts as a link between the actuator and the inside of the valve, transmitting the force needed for operation. Stems can either be smooth for valves controlled by an actuator or threaded for manual valves. Smooth stems are surrounded by packing material to prevent any material from leaking out of the valve. This packing material is subject to wear and will need to be replaced during maintenance. Smooth stems have threaded ends to allow for connection to the plug and actuator. The stem must be able to withstand significant compression force when the valve is closed and have high tensile strength when the valve is opened. Additionally, the stem must be straight or have very little deviation in order to ensure proper valve closure. This minimal deviation also reduces wear on the packing material contained in the bonnet, which is responsible for preventing leakage. To prevent foreign objects from entering the packing material and causing accelerated wear, the stem may be equipped with a protective cover over the packing nut.
Cage: The enclosure is a component of the valve that encircles the stopper and is situated inside the valve's body. Generally, the enclosure plays a significant role in regulating the flow within the valve. When the stopper is shifted, more of the apertures in the enclosure become exposed, resulting in an increase in flow, and vice versa. The design and arrangement of these apertures can greatly impact the flow of substances under specific temperature and pressure conditions. Additionally, enclosures are employed to direct the stopper towards the valve seat, ensuring a proper seal, thereby replacing the guidance provided by the bonnet.
Seat: The seating ring ensures a steady, consistent, and interchangeable sealing surface. Seats are commonly screwed or tightened, which presses the cage onto the edge of the seat and securely attaches it to the valve body. Alternatively, seats can be threaded and screwed into a designated area of the body, but this can make it challenging or even impossible to remove the seat ring for maintenance purposes. Seat rings are usually angled at the sealing surface to facilitate guidance when closing the valve.
Inexpensive globe valves or shut-off valves commonly found in plumbing systems typically employ a rubber washer positioned beneath the disc to create a tight seal when closed, ensuring no leakage occurs.
What is the purpose of a globe valve, and what is it used for?
There are various categories of valves that can be classified as globe valves. These include isolation valves, control valves, and others. As previously mentioned, the term "globe" refers to the round shape of the valve body.
The main function of a globe valve is to control, start, and regulate the flow of liquids and gases in pipes. Typically, it consists of a movable disk-like component and a stationary ring seat within a cylindrical body. The seat of the globe valve is located at the center and positioned alongside the pipe, while the opening of the seat is closed off using a disk or plug. The design of globe valves enables them to manage flow in both directions.
What makes isolation gate valves different?
There are various categories of valves that can be classified as globe valves. These include isolation valves, control valves, and others. As previously mentioned, the term "globe" refers to the round shape of the valve body.
The main function of a globe valve is to control, initiate, and regulate the flow of liquids and gases in pipes. Typically, it consists of a movable disk-like component and a stationary ring seat within a cylindrical body. The seat of the globe valve is positioned centrally and alongside the pipe, while the opening of the seat is closed off by a disk or plug. The design of globe valves enables them to manage flow in both directions.
What is the most common application of a globe valve?
Globe valves are commonly found in basic water faucets. By turning the handwheel, the disc either lowers or lifts. When the disc is fully lowered, the water supply is completely shut off. Conversely, when the disc is in its highest position, the water flow is at its maximum rate. In more extensive industrial settings, an electrical actuator may be used to seal a globe valve instead of a manual handle.
Typically, a globe valve contains a baffle. This baffle alters the direction of the liquid and guides it through. As a result, the fluid cannot flow as freely, leading to a drop in pressure within the valve. Globe valves are not suitable for slurries or thicker liquids that could potentially obstruct the baffle.
What industry or company uses globe valves?
Where appropriate, globe valves can be used in many process industries. However, their application determines the valve’s internal construction. For instance, a globe control valve would be trimmed with internal components designed to control the process fluid.
Globe valves are widely used in the plant piping industry and can be operated manually or automatically. Unlike gate valves, globe valves will help regulate pressure flows and complete the flow of liquids or their complete shutoff.
Forged Steel A105N 2” 600LB RF Flange Globe Valve:
Globe valve, also known as cut-off valve, belongs to the mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve flap, in order to force the sealing surface does not leak. When the medium enters the valve from below the valve flap, the resistance to be overcome by the operating force is the friction of the valve stem and packing and the thrust generated by the pressure of the medium, the force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be large, or else the stem will occur the top of the bending of the valve stem failure. According to the connection method is divided into three kinds: flange connection, silk buckle connection, welding connection. From the emergence of self-sealing valves, globe valves, the medium flow direction is changed from the valve flap above into the valve cavity, then under the action of medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also more tight. China's valve "three to" had stipulated that the flow direction of the globe valve, always use the top-down. Shut-off valve open, the opening height of the valve flap, for the nominal diameter of 25% ~ 30%. Flow has reached its maximum, that the valve has reached the full open position. So the full open position of the globe valve, should be determined by the valve's stroke.
Globe Valve Main features:
(1)The structure of globe valve is simpler than gate valve, and it is more convenient to manufacture and maintain.
(2) The sealing surface is not easy to wear and abrasion, good sealing, opening and closing of the valve flap and the valve body sealing surface of the valve body without relative sliding, so the wear and abrasion are not serious, good sealing performance, long service life.
(3)When opening and closing, the flap stroke is small, so the height of the globe valve is smaller than the gate valve, but the length of the structure is longer than the gate valve.
(4) opening and closing torque, opening and closing more laborious, opening and closing time is longer.
(5) Fluid resistance, because the valve body media channel is more zigzag, fluid resistance, power consumption.
(6) media flow direction nominal pressure PN ≤ 16MPa, generally used downstream, the media from the valve under the direction of upward flow; nominal pressure PN ≥ 20MPa, generally used countercurrent, the media from the valve on the direction of downstream flow. To increase the sealing energy. When used, the cut-off valve medium can only flow in one direction, can not change the flow direction.
(7) full open valve flap is often subject to erosion.
Globe Valve Usage:
Suitable for flammable and explosive, permeable and radioactive media, as well as industrial pipelines with strict requirements for sealing.
Applications:
Globe valves are used in: chemical industry, petrochemical, petroleum, papermaking, mining, electric power, liquefied gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment supporting, electronic industry, urban construction and other fields.
Introducing the Cast Steel CF8 DN80 PN16 RF Flange Globe Valve, a professional-grade product designed to meet your industrial needs. This valve boasts a range of features that ensure optimal performance and reliability.
Nominal Diameter: DN80
Bore: Full Bore
Nominal Pressure: PN16
Material: CF8
Operation: Handwheel
Design Standard: API602/API 623
Test/Inspection: API598
End Connection: RF Flange
Flange standard: ASME/ANSI B16.5
Top Flange: ISO5210 /ISO5211
Choose the Cast Steel CF8 DN80 PN16 RF Flange Globe Valve for a professional-grade solution that offers exceptional performance, reliability, and ease of use.
What Is a Globe Valve?
A globe valve, unlike a ball valve, is a type of valve that is used to control the flow in a pipeline. It consists of a movable plug or disc and a stationary ring seat in a generally round body.
Globe valves get their name from their round body shape, which is divided into two halves by an internal barrier. This barrier has an opening that creates a seat where a movable plug can be screwed in to close the valve. The plug is also known as a disc. In globe valves, the plug is connected to a stem that is operated by a screw mechanism using a handwheel in manual valves. Typically, automated globe valves have smooth stems instead of threaded ones and are opened and closed by an actuator assembly.
How Do Globe Valves Work?
Globe valves belong to the category of shut-off valves and are often mistaken for ball valves, although they possess distinct characteristics. Their purpose is to regulate the flow of water within a pipeline. These valves comprise a movable plug or disc-like component and a fixed ring seat, usually enclosed within a spherical body, hence the name "globe." The plug is linked to a stem that is controlled by a screw-like mechanism. In contrast, automatic globe valves employ sleek stems instead of threaded ones, alongside an actuator assembly.
Internal parts of a typical globe valve
The valve's body is the primary structure that holds the pressure and is easily recognizable as it constitutes the majority of the valve. It encompasses all the internal components of the valve that will interact with the substance being regulated. The bonnet is linked to the body and ensures that the fluid, gas, or slurry being controlled remains contained.
Globe valves are commonly two-port valves, although there are also three port valves available, mostly in a straight-flow setup. Ports serve as openings in the valve body for fluid to enter or exit. The two ports can be positioned directly across from each other, anywhere on the body, or at an angle, like 90°, which are known as angle globe valves. Globe valves are primarily used for fluids that are corrosive or have high viscosity and tend to solidify at room temperature. This is because straight valves are designed in a way that the outlet pipe aligns with the inlet pipe, allowing the fluid to remain in place in horizontal piping. On the other hand, angle valves direct the outlet pipe downwards, enabling the fluid to drain off. Consequently, this prevents the valve components from getting clogged or corroded over time.A globe valve may also feature a "Y" shaped body. This design enables a straight construction at the bottom, unlike other valves that typically have a pot-like structure for the bottom seat. Consequently, the fluid can flow smoothly through the valve, reducing the chances of clogging or corrosion over time.
Bonnet: where frequent inspection or maintenance is required, as it allows for easy disassembly. Bolted bonnet, on the other hand, provides a more secure and robust closure, making it suitable for high-pressure or high-temperature applications. The bonnet, regardless of its type, ensures that the valve body remains tightly sealed, preventing any leakage.
Plug or disc: The valve's closure component, known as plugs, are connected to the stem and can be moved up or down to regulate the flow. Plugs come in two types: balanced and unbalanced. Unbalanced plugs are solid and are suitable for smaller valves or when there is low pressure difference across the valve. They offer a simpler design with only one potential leakage point at the seat, and are usually more cost-effective. However, their size is limited, as larger unbalanced plugs require impractical amounts of force to seal and control the flow. On the other hand, balanced plugs have holes drilled through them. This design allows for easier shut off since the plug doesn't have to overcome static forces. However, it also creates a second potential leakage path between the plug and the cage, and generally comes at a higher cost.
Stem: The stem acts as a link between the actuator and the inside of the valve, transmitting the force needed for operation. Stems can either be smooth for valves controlled by an actuator or threaded for manual valves. Smooth stems are surrounded by packing material to prevent any material from leaking out of the valve. This packing material is subject to wear and will need to be replaced during maintenance. Smooth stems have threaded ends to allow for connection to the plug and actuator. The stem must be able to withstand significant compression force when the valve is closed and have high tensile strength when the valve is opened. Additionally, the stem must be straight or have very little deviation in order to ensure proper valve closure. This minimal deviation also reduces wear on the packing material contained in the bonnet, which is responsible for preventing leakage. To prevent foreign objects from entering the packing material and causing accelerated wear, the stem may be equipped with a protective cover over the packing nut.
Cage: The enclosure is a component of the valve that encircles the stopper and is situated inside the valve's body. Generally, the enclosure plays a significant role in regulating the flow within the valve. When the stopper is shifted, more of the apertures in the enclosure become exposed, resulting in an increase in flow, and vice versa. The design and arrangement of these apertures can greatly impact the flow of substances under specific temperature and pressure conditions. Additionally, enclosures are employed to direct the stopper towards the valve seat, ensuring a proper seal, thereby replacing the guidance provided by the bonnet.
Seat: The seating ring ensures a steady, consistent, and interchangeable sealing surface. Seats are commonly screwed or tightened, which presses the cage onto the edge of the seat and securely attaches it to the valve body. Alternatively, seats can be threaded and screwed into a designated area of the body, but this can make it challenging or even impossible to remove the seat ring for maintenance purposes. Seat rings are usually angled at the sealing surface to facilitate guidance when closing the valve.
Inexpensive globe valves or shut-off valves commonly found in plumbing systems typically employ a rubber washer positioned beneath the disc to create a tight seal when closed, ensuring no leakage occurs.
What is the purpose of a globe valve, and what is it used for?
There are various categories of valves that can be classified as globe valves. These include isolation valves, control valves, and others. As previously mentioned, the term "globe" refers to the round shape of the valve body.
The main function of a globe valve is to control, start, and regulate the flow of liquids and gases in pipes. Typically, it consists of a movable disk-like component and a stationary ring seat within a cylindrical body. The seat of the globe valve is located at the center and positioned alongside the pipe, while the opening of the seat is closed off using a disk or plug. The design of globe valves enables them to manage flow in both directions.
What makes isolation gate valves different?
There are various categories of valves that can be classified as globe valves. These include isolation valves, control valves, and others. As previously mentioned, the term "globe" refers to the round shape of the valve body.
The main function of a globe valve is to control, initiate, and regulate the flow of liquids and gases in pipes. Typically, it consists of a movable disk-like component and a stationary ring seat within a cylindrical body. The seat of the globe valve is positioned centrally and alongside the pipe, while the opening of the seat is closed off by a disk or plug. The design of globe valves enables them to manage flow in both directions.
What is the most common application of a globe valve?
Globe valves are commonly found in basic water faucets. By turning the handwheel, the disc either lowers or lifts. When the disc is fully lowered, the water supply is completely shut off. Conversely, when the disc is in its highest position, the water flow is at its maximum rate. In more extensive industrial settings, an electrical actuator may be used to seal a globe valve instead of a manual handle.
Typically, a globe valve contains a baffle. This baffle alters the direction of the liquid and guides it through. As a result, the fluid cannot flow as freely, leading to a drop in pressure within the valve. Globe valves are not suitable for slurries or thicker liquids that could potentially obstruct the baffle.
What industry or company uses globe valves?
Where appropriate, globe valves can be used in many process industries. However, their application determines the valve’s internal construction. For instance, a globe control valve would be trimmed with internal components designed to control the process fluid.
Globe valves are widely used in the plant piping industry and can be operated manually or automatically. Unlike gate valves, globe valves will help regulate pressure flows and complete the flow of liquids or their complete shutoff.
Forged Steel A105N 2” 600LB RF Flange Globe Valve:
Globe valve, also known as cut-off valve, belongs to the mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve flap, in order to force the sealing surface does not leak. When the medium enters the valve from below the valve flap, the resistance to be overcome by the operating force is the friction of the valve stem and packing and the thrust generated by the pressure of the medium, the force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be large, or else the stem will occur the top of the bending of the valve stem failure. According to the connection method is divided into three kinds: flange connection, silk buckle connection, welding connection. From the emergence of self-sealing valves, globe valves, the medium flow direction is changed from the valve flap above into the valve cavity, then under the action of medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also more tight. China's valve "three to" had stipulated that the flow direction of the globe valve, always use the top-down. Shut-off valve open, the opening height of the valve flap, for the nominal diameter of 25% ~ 30%. Flow has reached its maximum, that the valve has reached the full open position. So the full open position of the globe valve, should be determined by the valve's stroke.
Globe Valve Main features:
(1)The structure of globe valve is simpler than gate valve, and it is more convenient to manufacture and maintain.
(2) The sealing surface is not easy to wear and abrasion, good sealing, opening and closing of the valve flap and the valve body sealing surface of the valve body without relative sliding, so the wear and abrasion are not serious, good sealing performance, long service life.
(3)When opening and closing, the flap stroke is small, so the height of the globe valve is smaller than the gate valve, but the length of the structure is longer than the gate valve.
(4) opening and closing torque, opening and closing more laborious, opening and closing time is longer.
(5) Fluid resistance, because the valve body media channel is more zigzag, fluid resistance, power consumption.
(6) media flow direction nominal pressure PN ≤ 16MPa, generally used downstream, the media from the valve under the direction of upward flow; nominal pressure PN ≥ 20MPa, generally used countercurrent, the media from the valve on the direction of downstream flow. To increase the sealing energy. When used, the cut-off valve medium can only flow in one direction, can not change the flow direction.
(7) full open valve flap is often subject to erosion.
Globe Valve Usage:
Suitable for flammable and explosive, permeable and radioactive media, as well as industrial pipelines with strict requirements for sealing.
Applications:
Globe valves are used in: chemical industry, petrochemical, petroleum, papermaking, mining, electric power, liquefied gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment supporting, electronic industry, urban construction and other fields.
