At LUCKY6S, you can rely on that we will make the best globe valves for your fluid flow needs.
Top-quality globe valves are manufactured and customized by LUCKY6S Valve. These valves are a type of linear mechanism that is used to start, regulate, and halt the flow of fluid. The globe disk can either totally stop the flow or completely stop it. During the opening and closing of globe valves, they will travel perpendicular to the seat.
As the valve shuts, this motion will generate an annular gap between the seat ring and the disk, which will gradually close. This feature enables globe valves to have the high throttling capacity required to control flow. Because the seat ring and the disk make good contact, there is less likelihood of leakage. They can form a tighter seal between them because of the angle they’re at.
You can trust LUCKY6S to provide the best globe valves for your fluid flow requirements.
A globe valve is a linear motion valve that is used to initiate, halt, and control the flow of media. While most valves are named by their disc shape, a globe valve is named after its spherical body.
A globe valve’s body is made up of two sections that are connected by an internal baffle. A movable disc is attached to an aperture in the valve body, which serves as the seat for closing the globe valve.
Many current globe valves don’t have spherical bodies anymore. Globe valves, on the other hand, were evaluated since they have a comparable internal mechanism to a regular globe valve.
For isolation and throttling, a standard globe valve can be utilized. Straight-through valves, such as gate valves, ball valves, and plug valves, provide a somewhat bigger pressure drop than this type of valve. This means that a globe valve is best for applications where pressure drop isn’t a major concern.
When the disc moves in the opposite direction of the flow, the valve achieves a positive shut-off. The process flow pattern through this valve includes many direction changes. As a result, there is more resistance to flow, resulting in a high-pressure drop.
For applications involving high-pressure steam, a globe valve is ideal. Cooling water systems, feedwater, fuel oil systems, chemical feed, boiler drains and vents, turbine drains and seals, and other applications can all benefit from it.
Before selecting a globe valve for your project, it’s critical to go over the basics. This aids the whole system’s smooth and safe operation, as well as the globe valve’s long-term performance. Furthermore, it saves you money by avoiding the costs of dealing with problems that arise as a result of purchasing the incorrect valve.
Before making your ultimate decision, consider the following key factors:
When choosing a globe valve, this is one of the most crucial elements to consider. There are two main valve standards on the market: ASME (USA) and EN (Europe) (Europe). One of these standards is employed depending on the location of the plant or facility. This information is frequently included in an application’s technical specifications.
The pressure class is indicated by the numbers # (lbs.) and “ (inches) in ASME specifications. Meanwhile, under EN standards, the pressure class is expressed in PN, whereas the size is expressed in DN. Unfortunately, many valves on the market do not comply with this requirement.
Even if the valve is marked with PN 100 and DN 400, this does not always imply that it complies with EN standards. Many valves today have mixed specifications, so it’s always a good idea to double-check and confirm with the valve manufacturer.
In most cases, a globe valve is put in a pipeline that already has the size specified. If this is the case, it’ll be simple because the globe valve’s size will be similar to the pipeline’s size. However, there are a few other considerations to consider when selecting the appropriate valve size:
The maximum flow rate
The maximum pressure decrease that can be tolerated
It’s also worth noting that several valve types, such as globe valves and ball valves, come in both full bore and reduced bore versions. Make sure to check if there is a need for maximum permissible pressure drop when selecting a valve.
For example, if a globe valve is used in a steam system that creates steam for a turbine, pressure drop requirements are crucial for the turbine’s optimal operation. As a result, a full bore globe valve is strongly suggested. A reduced bore valve, on the other hand, is desirable if a valve is used to drain water at the pipeline’s end. Because the pressure drop is not a controlling factor, this is the case.
The major elements of your globe valve are made of different materials depending on the qualities of the process media. The material compatibility and resistance of materials with the process media, such as gas, steam, fluid, and so on, must be checked by the engineer who specifies the valve.
Also, keep in mind the operating conditions, as they have a role in the valve’s material selection. While stainless steel is a long-lasting material, it is not suitable for use in a saline environment. Aluminum bronze, on the other hand, is a better choice.
The globe valve’s trim (disc/stem/seat) materials should be compatible with the globe valve’s body materials. The materials chosen are further influenced by the process media, system conditions, maximum permitted leakage, and other factors.
Flanged, welded (BW or SW), and screwed end connectors are the most common for industrial valves (i.e., NPT). In most cases, the end connection is determined by the overall piping system’s design and construction. Factors such as safety, maintenance, and emissions are also taken into account.
The following are some of the most frequent end connections seen in various industries:
• Flanged water and wastewater treatment plants
• Welded steam power plants
• Welded gas systems
• Flanged refineries
In most cases, the pressure class of a valve is already provided by the pipe system’s pressure class. If this isn’t the case, the pressure class is determined by combining the major body materials, pressure, and temperature.
To establish the right pressure class for your globe valve, you must first define the piping system’s design temperature and pressure. Make sure you’re not determining the pressure class based on the system’s operating conditions. When a system’s “worst case scenario” occurs, your globe valve may not be able to endure it.
You must also decide how you want to operate your globe valve when making your selection. Here are some options for actuating your globe valve:
• Pneumatic actuator
• Electric actuator
• Manual (hand wheel/lever)
While globe valves are primarily used to control flow, they are available in a variety of materials, actuation, design, and other characteristics. This is why deciding which type is best for your application can be difficult. To assist you, the following are the various types of globe valves that will give you a clear idea of which type of globe valve will give you the best results:
In cryogenic applications, a stainless steel globe valve is frequently used. It is, however, well-suited for high-pressure and high-temperature services. Stainless steel is a tough material that is resistant to corrosion, abrasion, and certain chemicals. This allows the globe valve to operate at full capacity and helps to extend the valve’s service life.
A stainless steel globe valve is used for corrosive substances, heavy liquids, slurries, oil, gas, and other heavy fluids due to its durability. It is commonly found in the oil and gas industries, as well as water and wastewater treatment facilities, as well as the chemical and petrochemical industries.
A forged steel globe valve is a globe valve that is made from forging steel. The first step in this process involves the use of thermal energy to solidify steel pieces. The next step is to use mechanical pressures to shape steel into the desired globe valve configuration. This method increases the strength of a forged steel globe valve.
Aside from its durability, a forged steel globe valve can withstand temperatures ranging from -196°C to 700°C, making it suitable for high-pressure and high-temperature applications. Nuclear power plants, coal-fired power plants, petrochemical systems, pharmaceuticals, general utility services, and hydrocarbon processing are examples.
Cast steel globe valves are created through the casting process. This method of manufacturing involves melting steel and molding it into the desired shape. This method is ideal when customizing a globe valve to meet specific requirements. This means that a cast steel globe valve can be made in a variety of shapes and with a variety of parts.
Because the globe valve is cast in steel, it has increased strength, wear resistance, and a longer lifespan. A cast steel globe valve is used in power generation plants, water and wastewater treatment plants, chemical and petrochemical facilities, and other industries that deal with harsh working conditions because of these characteristics.
A bronze globe valve is a type of globe valve that has high durability and malleability. This means that the valve will not crack easily, which is a common issue with several materials. A bronze globe valve is also inexpensive and has a high corrosion resistance.
As a result, in applications involving high pressure, high temperature, and corrosive materials, a bronze globe valve is frequently used to control flow direction and provide a positive shut-off.
A bronze globe valve can be found in both commercial and industrial settings. HVAC (Heating, Ventilation, and Air Conditioning), compressed air, cold and hot water, gas systems, and other utility services all use it.
A brass globe valve is made of a zinc and copper alloy, which gives the valve greater versatility. Brass, like bronze, is a malleable metal that is easy to cast or forge. It has excellent corrosion resistance; however, it does not work well when exposed to high levels of chlorine.
A bronze globe valve is typically less expensive than a brass globe valve. It does, however, perform better in natural gas lines and other harsh applications. Because of its high melting point, it is suitable for high-pressure and high-temperature applications.
The ductile iron globe valve is made of ductile iron, which is an iron alloy containing a specific graphite. This makes the globe valve extremely ductile, preventing it from easily breaking. It can withstand temperatures of up to 730 degrees Celsius (1350F).
The corrosion resistance, yield strength, and tensile strength of a ductile iron globe valve are all excellent. Because of these characteristics, this type of globe valve is well-suited for harsh working conditions. It is more expensive than a cast iron globe valve, but it has a more solid structure. It can withstand high pressures and temperatures and will not rust easily.
A ductile iron globe valve is commonly used in oil refineries, steam power plants, water and wastewater treatment plants, and other high-pressure industrial applications.
A cast iron globe valve is made of cast iron, which is an iron, carbon, and silicone alloy. It has excellent temperature tolerance, with some cast iron valves capable of regulating media flows at temperatures exceeding 1150 degrees Celsius (2100F).
A cast iron globe valve is so strong that it usually survives even after being subjected to frequent vibrations. It does not, however, have high ductility. It is commonly used in low-pressure industrial applications because it is less expensive than a ductile iron globe valve.
The most common type of globe valve is a tee pattern / z-type. It has a simple design in which the valve seat is contained by the z barrier inside the body. The seat’s horizontal design allows the disc and stem to move perpendicular to the pipe axis.
The seat is easily accessed via the bonnet, which is linked to a large orifice above the valve body. The stem, like a gate valve, passes through the bonnet.
This design simplifies installation, repair, and maintenance. A z-type globe valve is commonly used in applications that require throttling but do not have a high pressure drop.
A y-pattern or wye globe valve has a stem and seat that are angled at about 45 degrees to the pipeline axis. It has the lowest flow resistance. This design is frequently used in high-pressure and severe applications where pressure drop is critical.
An angle globe valve directs the process flow by 90 degrees without the need for an elbow or additional pipe weld. As a result, the disc can open adjacent to the process flow. Because it can handle slugging effects, this design is also used in fluctuating flow conditions.
A hydraulic actuator is used to operate a hydraulic globe valve. A hydraulic actuator generates mechanical energy by converting fluid pressure. In many cases, a hydraulic actuator is outfitted with fail-safe features that allow it to open or close the globe valve in the event of an emergency. Hydraulic pressure can be obtained from the system’s hydraulic pressure pump.
Through the use of a pneumatic actuator, a pneumatic globe valve can be operated semi-automatically or automatically. The globe valve is operated by a pneumatic actuator, which uses compressed air. It is quick-acting, making it ideal for throttling services. A pneumatic actuator is completely safe to use because it is powered by air.
Because it is less expensive, produces less noise, and promotes smooth operation, an electric actuator is an excellent choice for actuating globe valves.
To operate, an electric globe valve employs an electric actuator, which converts electrical energy into mechanical energy. It gives the operator the option of controlling the valve manually, semi-automatically, or automatically. A limit switch may be included in some cases to stop the motor when it is fully open or fully closed.
A handwheel or crank is used to operate a manual globe valve. It enables the operator to precisely position the valve as needed. The handwheel is linked to a hammer or a stem, which allows the valve to be hammered open or closed as needed.
The stem of a manual globe valve twists the disc to close the globe valve. When compared to an automated valve, this mechanism is a little slower and less smooth. It does, however, promote simple and precise control of the globe valve.
A high-temperature globe valve is specifically designed to withstand service conditions that include high temperature, low temperature, corrosion, abrasion, and, in some cases, high viscosity and vacuum. This type of globe valve is made of stainless steel, carbon steel, duplex, super duplex, Inconel, and Monel to withstand such harsh conditions.
A high-temperature globe valve is ideal for handling liquids, liquid-solid mixtures, gas, powder, slurry, and other viscous fluids. Polymers and plastics, fine chemicals, petrochemicals, cryogenic applications, and nuclear power plants all make extensive use of it.
Stainless steel, carbon steel, or alloy steel are the most common materials used to make high-pressure globe valves. It can withstand pressures ranging from Class #150 to #2500. It is also capable of operating at temperatures of at least 425 degrees. A high-pressure globe valve is useful in the production of steam, oil, water, and electricity.
High-pressure globe valves are commonly used for shut-off and throttling services in the oil and gas industries, power generation, petrochemical plants, hydrocarbon processing, refining, and other industrial applications with harsh working conditions.
A cryogenic globe valve is designed specifically for applications involving extremely low temperatures. It is also used in environments with high pressure and corrosive media.
To ensure a positive shut-off, a cryogenic globe valve has a self-aligning disc and an integral seat. This also contributes to the globe valve’s longevity. It also has an extended bonnet, which reduces thermal conduction between the process media and the valve packing.
A cryogenic globe valve is made of stainless steel, carbon steel, copper alloy, and other durable materials to withstand harsh working conditions and ensure the valve works optimally for a long time. Cryogenic globe valves are commonly found in steel plants, petrochemical plants, air separation facilities, and other oil and gas applications.
A steam globe valve is widely used in a variety of industries because it provides precise control and throttling. Steam is a critical medium for heating chemical and industrial processes. It’s also used to generate heat, regulate pressure and temperature, provide mechanical energy, and remove impurities.
When steam is transferred from the boiler to the application point, it heats either directly by coming into contact with the substance to be heated or indirectly by using a heat exchanger. A globe valve is critical in regulating the flow of steam from the boiler to the application point. It is used to regulate the amount of water vapor and the pressure level of steam.
Chemical plants, refineries, and food processing plants are all common places to find steam applications.
A rising stem gate valve, also known as an outer stem and yoke (OS & Y) valve, has a stem that rises when the valve is opened and descends when the valve is closed. Because the smooth portion of its stem is exposed to the media flow, it will rise over the handwheel. This means that when the valve is open, both the stem and the disc are removed from the flow channel.
The stem of a non-rising stem gate valve does not travel upward from the valve bonnet, regardless of the valve’s position. When the stem rotates, the valve disc, which is threaded inside, travels along the stem like a nut. The stem threads are exposed to the flow medium in this configuration. As a result, it’s commonly employed in applications with limited areas.
This valve, also known as an inside screw valve, is suited for process media that does not cause the stem material to corrode, erode, or wear & tear.
The gate valve with a butt-weld end connection is known as a butt-weld gate valve. This connection style is constructed such that each end of the gate valve is slanted to fit the pipe’s bevel and thickness. The two ends are then “butted” to the pipe and soldered together. Steel gate valves frequently use a butt-weld connection.
The improved strength of a butt-weld gate valve makes it suited for high-pressure and high-temperature applications.
The gate valve with flanged end connections is known as a flanged end gate valve. This is one of the simplest connections to install and/or remove in a pipeline. As a result, it is the most frequent connection found on industrial valves.
To secure the gate valve to the pipe flanges, a flanged end connection is connected with numerous bolts. When compared to other connection types, this design allows the gate valve to be tightened with less torque. Flanged end connections can be utilized in other valves besides gate valves, such as ball valves.
The most common bonnet connection in globe valves is a bolted bonnet. The body and bonnet flanges are joined with nuts and studs, and a gasket (made of compatible materials) is attached between the flange faces to aid in seating. To achieve positive sealing, the nuts or studs are tightened to desired torques in a design determined by the manufacturer.
A welded bonnet globe valve has a body and bonnet that are welded together without the use of bolts. It is typically used when no disassembly is required. A welded bonnet globe valve is smaller, stronger, and lighter than a bolted bonnet globe valve.
Among the various types of bonnet connections, a screwed bonnet globe valve has the most basic design. A screwed bonnet provides a strong and pressure-tight seal despite its simple design. It is frequently used when the budget is the most important consideration.
In high-pressure and high-temperature applications, a globe valve with a pressure seal bonnet is commonly used. The bonnet is pulled up and seals against the gasket in a pressure seal design.
This mechanism creates a seal between the body’s inner diameter (ID) and the pressure seal gasket. This means that as the force in the gasket increases, the pressure in the body cavity rises, reducing the possibility of leakage.
A globe valve with a ball disc is most commonly found in low-temperature and low-pressure applications. It is intended to initiate and terminate media flow, but it also has excellent throttling capabilities.
When compared to other disc types, a globe valve with a needle disc provides better throttling services. To meet varying flow requirements, various long and tapered needle discs are available.
A single-seated globe valve has a straightforward design and few interior components. It is simple to access and maintain as a result of these factors. It has one seat and one disc and is less than half the size of a double-seated globe valve.
The pressure of the process flow pushes against the disc or plug in this configuration, necessitating more actuator force to control the movement of the globe valve.
A single-seated globe valve provides excellent shut-off while producing less vibration. Because it is more commonly used than a double-seated, it comes in a variety of trim designs and can handle a broader range of flow features.
A double-seated globe valve is made up of two seats and two plugs that operate within the valve body. It has more interior parts, making it heavier and larger in size than a single-seated model. Because it is an older design, it is more common in older systems. It is rarely used in modern applications because single-seated chairs are more common.
A double-seated globe valve reduces the actuator force required to operate the globe valve by using opposing pressures from the plugs. This increases the valve’s flow capacity. However, a positive shut-off is not guaranteed due to these opposing pressures.
The two-way globe valve is made up of two ports or opening – an inlet port and outlet port. It’s utilized in a variety of applications that require basic on/off functionality. When an emergency happens, it may rapidly stop media flow to a specified location, making it a crucial component in numerous safety systems.
In flow systems with varying flow, temperature, and pressure, a two-way globe valve can be used. It’s also employed in a variety of hot and cold applications. The stem and plug can be adjusted to ensure that the complete system works properly. The system’s effectiveness also helps to avoid equipment damage and increases the globe valve’s service life.
A two-way globe valve is utilized in a range of industries, including oil and gas, power production, water distribution, wastewater treatment, and chemical and petrochemical industries, since it improves system efficiency.
The structure of a three-way globe valve is similar to that of a two-way globe valve with the addition of a third port. A, B, and AB are the port designations. A three-way globe valve is typically used to divert media flow or combine fluids that are carried through to one outlet port from two inlet ports.
A three-way globe valve has one inlet from the providing side of the pipe and two exits heading to the return side of the pipe when used as a diverting valve. A diverting valve is generally more expensive than a mixing valve.
A three-way globe valve has two intake ports from the providing side of the pipe and one exit port to the returning pipe when used as a mixing valve. This enables for the mixing of the media flow before it is delivered through an outlet.
In process sectors that deal with oils, chemicals, and water, a three-way globe valve is commonly utilized.
The end connections of a butt weld globe valve are beveled to match the thickness of the pipeline wall. Backing rings or sleeves are sometimes used to align the valve bore and pipeline. These rings are also used to keep weld spatters out of the pipeline.
Butt weld end connections are most commonly found on steel globe valves with diameters of 50 mm and larger. They are frequently used in applications involving high pressure and high temperature.
A threaded globe valve connects to pipelines with screws. Female threads are found on valves with threaded or screwed ends, whether parallel or tapered. There are several occasions, though, where a male thread is utilized instead.
In smaller globe valves made of bronze, a threaded end is usually used. Depending on the application and system requirements, it is sometimes utilized in steel and iron valves.
When the ends of the pipes it is utilized in are flat or simple, a socket weld globe valve is chosen. Steel globe valves with a diameter of 50 mm or less have a socket weld end. It’s employed in high-pressure, high-temperature applications that don’t require dismantling on a frequent basis.
In industrial valves, flanges are one of the most common end connectors. The globe valve may be readily fitted and withdrawn from the pipeline since it has a flanged end.
A gasket is put between the flanges to ensure a tight seal. Depending on the nature of the application and the materials used in the pipelines, this gasket might be metallic, non-metallic, or a combination of both. Globe valves with diameters of 15 mm and up have flanged ends.
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