For any sector that relies on hydraulic systems in their operations, gas plug valves are an essential component for the smooth and efficient running of the systems. Usually available in cylindrical or conical shapes, plug valves are quarter-turn manual motion valves used for stopping or starting the flow of fluid. They offer on-off, diverting, as well as basic moderate throttling services.
For any sector that relies on hydraulic systems in their operations, gas plug valves are an essential component for the smooth and efficient running of the systems. Usually available in cylindrical or conical shapes, plug valves are quarter-turn manual motion valves used for stopping or starting the flow of fluid. They offer on-off, diverting, as well as basic moderate throttling services.
Read on for an overview on plug valves, along with their types and applications.
A plug valve is based on a plug with a hollow passage in the valve body. The quarter-turn motion creates an alignment between the pipe and the hole, leading to an open state. When turned to a 90-degree angle from the open position, the valve sits across the pipe leading to a closed state.
See the animated video below that explains how a plug valve works.
Plug valves are available in a variety of different styles and port openings through the plug.
Plug valves are an excellent option for many commercial and light industrial applications, including directional flow control, handling of gas or liquid fuels, regulating fluids with suspended solids, such as slurries, or handling low-pressure, low-temperature services. Due to their smooth design, inline maintenance capabilities, leak-tight service, minimal resistance to flow, and multi-port design options, gas plug valves find application across a multitude of sectors and systems.
Highly suitable for dirty upstream applications, the cast iron lubricated plug valves can handle abrasive or corrosive materials and do not get clogged. These plugs require frequent resealing for maintaining optimum effectiveness.
Used in settings that prioritize low-maintenance applications, non-lubricated plug valves include elastomer sleeved, lift-type, and fully lined plug valves.
These valves comprise multiple components and a complex rotation motion that helps in avoiding wear or abrasions to the seals. They are a good fit for preventing product contamination in applications that do not require double isolation.
Ideal for applications that need a higher seating force and minimal friction from open to closed position, eccentric plug valveeccentric plug valves find a place in a wide range of isolation or flow control systems. This includes sewage, sludge and slurries, air, and other services.
Besides being compact and using up less space, gas plug valves offer the following advantages:
A few disadvantages of plug valves are:
Learn more about plug valves by reading our next article: Plug Valves vs. Ball Valves: What are the Differences?
Whether it is gases, liquids, non-abrasive slurries, fuel gas piping systems, chemical industries, fly ash applications, or vacuum to high pressure applications, plug valves play a key role in an extensive range of applications and industries.
At Norgas, our team of experienced professionals has a deep understanding of the HVAC, propane, industrial, and combustion markets. We can help you find the best gas plug valves among reputable brands such as Milliken Hattersley plug valves or flow regulation solutions for your specific project or application.
Contact us at 888-427- for more information on our gas plug valves or if you have questions about our other products such as our gas regulators and gas flow meters.
We&#;ve previously discussed how to select specific valves for improving production time and MTBF and thought it would be a good time to review one of the most simple and economical valves available: the plug valve.
Plug Valve Basics
A plug valve is shaped like a cylinder or cone and can be rotated inside the valve body to control flow of fluids. Plug valves have one or more hollow passageways often placed horizontally to allow ease of flow through the valve when open. The most common type of plug valve is the 2 port model with an open and closed position. The two ports are usually located on opposite sides of the valve with one passageway leading from inbound to outbound and the stem and handle located on the top. A plug valve also uses a quarter turn valve, which is useful where quick and frequent operation is essential. The valve ends can be flanged, hub type, or butt weld.
Plug Valve Types and Their Uses
Although there are many types of plug valves, there are four general categories, each with their own benefits.
1. Lubricated Plug Valve
As the name suggests, a lubricated valve uses a lubricant usually made up of a base oil and viscosity improver (like amorphous or fumed silica) that is injected under pressure between the plug face and body seat to reduce friction and seal ports. Valve manufacturers generally recommend lubricant suitable for the process fluid, and the valves often must be resealed after only a few cycles, and in some cases, after every cycle. Considered a high maintenance plug valve, they are often used in applications that have infrequent operations. Lubricated plug valves perform well in processes that utilize fluids which carry mildly abrasive particles such as dirty upstream applications, gas pipeline systems that need bypass valves, and as blow-down valves on valve stations and kicker valves.
2. Non-Lubricated Plug Valve
This plug valve utilizes a tapered or cone-shape that acts as a wedge and presses a polymeric sleeve against the body cavity. The use of the sleeve reduces friction between the plug mechanism and body. Non-lubricated plug valves are often used instead of lubricated ones in applications where maintenance needs to be kept to a minimum, such special services in sulphur, hydrogen fluoride, or where liquids could be trapped or solidify and potentially jam the valve. However, non-lubricated plug valves are limited by temperature and chemical compatibility of the non-metallic materials they are made of.
The three main types of non-lubricated plug valves are:
3. Eccentric Plug Valve
The design of this plug valve uses a half plug that is advantageous for applications needing a higher seating force with minimal friction from open to closed position. The torque seated valves also feature improved shut off capabilities. Eccentric plug valves are used for a wide range of flow control and isolation applications including clean and dirty water, sewage, sludge and slurries, air, and other services.
4. Expanding Plug Valve
This complex plug valve uses multiple components that allow the valve to mechanically expand and give it a true double block and bleed function in one valve. The plug valve uses a mechanism that rotates between the open and closed position and protects both seals from the flow path. During rotation there is no contact between body and seals, and slips expand onto the body seat when the valve is closed to avoid causing any wear or abrasion to the seals. They are often used to prevent product contamination in applications that do not require a double isolation.
In conclusion, plug valves have a number of useful applications, and new technology and designs are sure to give them an even wider variety of applications within many processes. And if you need more information on different types of valves, check out this piece on check valves or the rest of the site.
Sources:
Read on for an overview on plug valves, along with their types and applications.
A plug valve is based on a plug with a hollow passage in the valve body. The quarter-turn motion creates an alignment between the pipe and the hole, leading to an open state. When turned to a 90-degree angle from the open position, the valve sits across the pipe leading to a closed state.
See the animated video below that explains how a plug valve works.
Plug valves are available in a variety of different styles and port openings through the plug.
Plug valves are an excellent option for many commercial and light industrial applications, including directional flow control, handling of gas or liquid fuels, regulating fluids with suspended solids, such as slurries, or handling low-pressure, low-temperature services. Due to their smooth design, inline maintenance capabilities, leak-tight service, minimal resistance to flow, and multi-port design options, gas plug valves find application across a multitude of sectors and systems.
Highly suitable for dirty upstream applications, the cast iron lubricated plug valves can handle abrasive or corrosive materials and do not get clogged. These plugs require frequent resealing for maintaining optimum effectiveness.
Used in settings that prioritize low-maintenance applications, non-lubricated plug valves include elastomer sleeved, lift-type, and fully lined plug valves.
These valves comprise multiple components and a complex rotation motion that helps in avoiding wear or abrasions to the seals. They are a good fit for preventing product contamination in applications that do not require double isolation.
Ideal for applications that need a higher seating force and minimal friction from open to closed position, eccentric plug valves find a place in a wide range of isolation or flow control systems. This includes sewage, sludge and slurries, air, and other services.
Besides being compact and using up less space, gas plug valves offer the following advantages:
A few disadvantages of plug valves are:
Learn more about plug valves by reading our next article: Plug Valves vs. Ball Valves: What are the Differences?
Whether it is gases, liquids, non-abrasive slurries, fuel gas piping systems, chemical industries, fly ash applications, or vacuum to high pressure applications, plug valves play a key role in an extensive range of applications and industries.
At Norgas, our team of experienced professionals has a deep understanding of the HVAC, propane, industrial, and combustion markets. We can help you find the best gas plug valves among reputable brands such as Milliken Hattersley plug valves or flow regulation solutions for your specific project or application.
Contact us at 888-427- for more information on our gas plug valves or if you have questions about our other products such as our gas regulators and gas flow meters.
If you want to learn more, please visit our website pharmaceutical valve.
We&#;ve previously discussed how to select specific valves for improving production time and MTBF and thought it would be a good time to review one of the most simple and economical valves available: the plug valve.
Plug Valve Basics
A plug valve is shaped like a cylinder or cone and can be rotated inside the valve body to control flow of fluids. Plug valves have one or more hollow passageways often placed horizontally to allow ease of flow through the valve when open. The most common type of plug valve is the 2 port model with an open and closed position. The two ports are usually located on opposite sides of the valve with one passageway leading from inbound to outbound and the stem and handle located on the top. A plug valve also uses a quarter turn valve, which is useful where quick and frequent operation is essential. The valve ends can be flanged, hub type, or butt weld.
Plug Valve Types and Their Uses
Although there are many types of plug valves, there are four general categories, each with their own benefits.
1. Lubricated Plug Valve
As the name suggests, a lubricated valve uses a lubricant usually made up of a base oil and viscosity improver (like amorphous or fumed silica) that is injected under pressure between the plug face and body seat to reduce friction and seal ports. Valve manufacturers generally recommend lubricant suitable for the process fluid, and the valves often must be resealed after only a few cycles, and in some cases, after every cycle. Considered a high maintenance plug valve, they are often used in applications that have infrequent operations. Lubricated plug valves perform well in processes that utilize fluids which carry mildly abrasive particles such as dirty upstream applications, gas pipeline systems that need bypass valves, and as blow-down valves on valve stations and kicker valves.
2. Non-Lubricated Plug Valve
This plug valve utilizes a tapered or cone-shape that acts as a wedge and presses a polymeric sleeve against the body cavity. The use of the sleeve reduces friction between the plug mechanism and body. Non-lubricated plug valves are often used instead of lubricated ones in applications where maintenance needs to be kept to a minimum, such special services in sulphur, hydrogen fluoride, or where liquids could be trapped or solidify and potentially jam the valve. However, non-lubricated plug valves are limited by temperature and chemical compatibility of the non-metallic materials they are made of.
The three main types of non-lubricated plug valves are:
3. Eccentric Plug Valve
The design of this plug valve uses a half plug that is advantageous for applications needing a higher seating force with minimal friction from open to closed position. The torque seated valves also feature improved shut off capabilities. Eccentric plug valves are used for a wide range of flow control and isolation applications including clean and dirty water, sewage, sludge and slurries, air, and other services.
4. Expanding Plug Valve
This complex plug valve uses multiple components that allow the valve to mechanically expand and give it a true double block and bleed function in one valve. The plug valve uses a mechanism that rotates between the open and closed position and protects both seals from the flow path. During rotation there is no contact between body and seals, and slips expand onto the body seat when the valve is closed to avoid causing any wear or abrasion to the seals. They are often used to prevent product contamination in applications that do not require a double isolation.
In conclusion, plug valves have a number of useful applications, and new technology and designs are sure to give them an even wider variety of applications within many processes. And if you need more information on different types of valves, check out this piece on check valves or the rest of the site.
Sources:
For more information, please visit pharmaceutical valves.