Gnee steel group is a supply chain integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing. Founded in 2008, with 5 million RMB registered capital, Gnee has made impressive progress and development in steel market with Gnee People more than 15 years hard fighting. At present, the total investment amount reaches 30 million RMB, workshop area more than 35000㎡, with over 200 employees. Gnee is becoming the most professional international steel supply chain company in China central plains with explicit strategic framework, integrated governance structure, firm management foundation, abundant fund and human power.
Why Choose Us?
Our products
GNEE Group specializing in the manufacture and distribution of high quality valves and fittings for a wide range of industrial applications including water supply, sewage systems, oil and gas, and marine treatment.
Sales market
GNEE valves have been exported to more than 150 countries around the world, and every year more than 50 customers visit the GNEE Group and order more than 30,000 pieces of valves.
Our team
Established in 2008 with a registered capital of RMB 5 million, GNEE Group At present, the company has a total investment of 30 million yuan, a plant area of more than 35,000 square meters and more than 200 employees.
Customer service
GNEE Group always puts product quality and customer needs first, and strives to provide better services to each of our customers. We follow the latest standards and focus on management, technology and process innovation. With a mature sales service system, GNEE Group insists on providing one-stop service to every customer.
Size: 1/2"~20"; DN15~DN1500
Normal pressure: Class 150LB~2500LB; PN16~PN420
Design standard: API 599,API 6D,ASME B16.34; BS 5353
Specification: DN50-DN300
Applicable Medium: Water,Oil,Gas
Warranty: 1year
Size: 1/2 "-24 "
Connection: RF/RTJ Flange, Butt Welded
Pressure Rating: Class 150LB~ 900LB
Size: 3"12"/DN80-DN300
Working Pressure: Class125/PN10/PN16/PN25
Flanged Standard: ANSI B16.1,ANSI B16.42,EN1092-2,GB/T17241.6
Working Temperature: -20°C- 120°C
Stainless Steel Flange Plug Valve
Size: 1/2"~20"; DN15~DN500
Normal pressure: Class 150LB~900LB; PN16~PN160
Design standard: API 599,API 6D,ASME B16.34; BS 5353
High Pressure Lubricated Plug Valve
Size Ranges: NPS 1/2"~42"
Inspect and Test: API 598
Flanged Dimension: ANSI / ASME B16.5, EN 1092
Material: stainless steel 201,304,316
Size: 1/4"-4"
Usage: Petroleum, chemical industry, electric power, coal mine, construction
Size Range: DN50(2") ~DN350 (14")
Face to Face: API 6D, ASME B 16.10,EN 558,DIN3202
Temperature Range: -29°~ 350°C
Design: API 6D, API599
Pressures Range: ANSI 150 ~ANSI 900 ,PN10~PN150
Size Range: DN50(2") ~DN350 (14")
A4 way plug valve is a type of valve that has four ports and a single plug that rotates to control the flow of fluid through the valve. The plug is typically cylindrical or spherical and has a bore that allows fluid to flow through it when it is aligned with the ports. The plug can be rotated to align the bore with any of the four ports, allowing fluid to flow from one port to another or to be blocked entirely.
4 way plug valves are commonly used in plumbing and industrial applications to control the flow of liquids or gases. They are also used in some automotive applications, such as fuel injection systems.
Benefits of Four Way Plug Valve
Allows for minimal flow restriction
Plug valves feature a full port design. This means that the opening through the valve is the same size as the pipeline.
As a result, they allow for maximum flow capacity and minimal flow restriction. It makes them ideal for applications where a low-pressure drop is critical.
Additionally, the full port design of plug valves can also help to reduce the risk of fluid turbulence and erosion within the valve. This prevents wear and damage to the valve, improving longevity.
Prevents leakages and spillages
Leaks and spills can not only be costly but also hazardous. Luckily, you can use plug valves to stop the issue.
When you close a plug, it forms a tight seal with the valve body. With a tight shut-off, plug valves can completely stop the flow of fluid through a pipeline. This can help prevent leakage in pipelines.
Durable
Designed to be long-lasting, plug valves can withstand high pressures and temperatures. Since they have a simple and robust design, it reduces the number of moving parts and potential failure points.
Plug valves are also resistant to wear and corrosion. This makes them ideal for use in harsh industrial environments.
Ease of maintenance and operation
Plug valves have a simple design. With fewer moving parts compared to other valves, they are easy to maintain and repair. You can easily disassemble them to inspect and fix any issues.
The simple design of plug valves also makes them easier to operate. This can be especially important in applications where you need to operate the valve manually. As a result, it can reduce the risk of operator error or misalignment.
Offers great versatility
Plug valves are versatile in terms of the fluids they can handle. They can control the flow of a variety of fluids, including gases, liquids, and slurries. You can also use them with fluids that may be corrosive or abrasive since they're available in different materials for construction
Regarding pressure capabilities, plug valves can also be designed to operate in a wide range of conditions. They can handle pressures up to several thousand pounds per square inch (psi), depending on the specific valve design and materials used.
Since they can also operate at a wide range of temperatures, they are ideal for use in high-temperature or cryogenic applications.
Types of Four Way Plug Valve
These valves use lubricants or sealants to ease their operation over a wide range of operating pressure. The lubrication film which is used between plug and body provides a seal and that requires periodic lubricant injection. The sealant must be like that it does not get washed away with the fluid as the fluid can get contaminated and it should be able to withstand line temperature. These lubricants in plug valves are mostly plastic sealants. The use of effective sealant with properties such as proper elasticity, resistance to chemicals, and its ability to form an impervious seal around each body part is essential. The lubricating film also protects the metal surfaces between the plug and body from corrosion.
Lubricated plug valves are manufactured in sizes ranging from DN 15 to DN 900. They are used in applications with pressures over 2500 psi.
These plug valves are usually used for lower pressure lines. These valves contain an elastomeric body liner or sleeve installed in the body cavity. The plug that is tapered and polished acts like a wedge and tends to press the sleeve against the body. Thus the sleeve reduces the friction between the plug and the body.
This type of plug valve design uses a half plug. This design helps in applications requiring a higher seating force with minimal friction from open to closed position. Improved shut off capabilities is the main feature of the the torque seated valves. Eccentric plug valves find application in a wide range of flow control and isolation services. Some of the typical applications of eccentric plug valves are clean and dirty water, sewage, sludge and slurries, air, and other services.
Expanding plug valves are complex in design. They use multiple components allowing the plug valve to expand mechanically and give it a true double block and bleed function in one valve. This types of plug valves uses a mechanism that rotates between the open and closed position and protects both seals from the flow path. The body and seals does not contact each other during rotation which avoids wear or abrasion to the seals. For applications not requiring double isolation, expanding plug valves are often used to prevent product contamination.
1.Plug valves are commonly used in low-pressure-low-temperature services, although some high-pressure-high-temperature designs also exists.
2.Plug valves are high-capacity valves that can be used for directional flow control, even in moderate vacuum systems.
3.Plug valves can efficiently handle gas and liquid fuel.
4.Plug valves can safely handle extreme temperature flow, such as boiler feed water, condensate, and other such elements.
5.Plug valves can be used to regulate the flow of liquids containing suspended solids, for example, slurries.
Components of Four Way Plug Valve
The plug valve body
A valve body consists of all the internal components of the valve. It connects to the pipes through an end connection.
The plug valve stem
Plug valves have a stem that connects the disc (or disk) to the actuator. This helps in transferring the movement of the actuator to the plug disc, so the plug disc can be opened or closed.
The plug valve disc
Out of all the valves, the plug valve, ball valve, and globe valve share some similarities. The plug disc, also known as a tapered disc, acts as a plug. Globe valves and plug valves have major differences in how their discs are designed. Globe valves have cylindrical discs, while plug valves are solid metal with tapered ends.
How to Maintain Four Way Plug Valve
Lubrication: Adequate lubrication is crucial for plug valves. Regularly check and ensure proper lubrication of valve components, including the shaft, bearings, and sealing surfaces. Lubricants help reduce friction, prevent corrosion, and ensure smooth valve operation.
Troubleshooting Common Plug Valve Issues
Here are some common plug valve challenges:
Leakage
If you experience leakage from the valve body or packing area, it may be due to worn-out seals or improper installation. Inspect the seals and consider replacing them if needed. Ensure proper tightening and alignment of components during reassembly.
Sticking or binding
A plug valve that is difficult to operate and feels stiff may suffer from sticking or binding. This issue can arise due to excessive debris, build-up, or incorrect lubrication. Clean the valve thoroughly to remove any obstruction and reapply lubricant as necessary.
Erosion and corrosion
Over time, plug valves may expose themselves to erosive fluids or corrosive environments, leading to degradation of the valve material. Regularly inspect the valve's exterior and internal surfaces for signs of erosion and corrosion. If detected, consult with experts for appropriate material selections or implement protective coatings.
Pressure Testing Method for Plug Valve
When the plug valve undergoes a strength test, the medium is introduced from one end, and the other remaining access is closed. Turn the plug to various positions for testing. If there's no leakage at the valve body, it is considered qualified.
For the sealing performance test, the pressure inside the chamber and on the channel should be kept equal. Turn the plug to the closing position. Check from the other end. Then rotate the plug for 180 degrees and repeat the above steps. For a three-way or four-way plug valve, the pressure inside the cavity should be kept equal to the pressure on the end of the channel. Turn the plug to the closing position. Pressure is introduced from the right angle end. And check simultaneously from other ends.
Operation of a Plug Valve
The operation of a plug valve is based on a relatively simple design. The control element, which is a cone-shaped disc or wedge, moves perpendicular to the fluid flow. When the disc is fully rotated through 90°, maximum flow is allowed, and when rotated, the fluid flow is shut off. This opening and closing mechanism is achieved by means of a stem that connects to the plug and is operated by a handwheel, lever or motorized actuator, depending on the specific application.
The pipeline where the installation is to be carried out shall be empty, clean, and pressure-free prior to commencement of installation. The following steps are to be carried out during the installation of a plug valve.
1.Check both inlet and outlet side clean and obstruction-free for correct installation of the valve.
2.Carefully unpack the valve and dismantle the actuating mechanism for ease of installation. It can be put back in place once the installation is complete.
3.Put the valve in place and align it properly, so the faces of the connection meet parallel to each other and are on the same axis without stressing the pipeline.
4.Do not overstress the valve by excessively tightening the flange bolts or coupling. Instead, optimum tightening should be carried out to prevent any leakage from the connections during operation.
5.After installation, make the line operational and check for the proper function of the valve and any leakage in the connection. Tight accordingly.
Tip: 1. When this valve is installed in a horizontal line, the preferred installation uses the plug rotating 90° upward to open. Utilizing this orientation can lessen the effect of solids in fluid preventing plug operation.
2.In low pressure/low flow systems with solids present, install a valve with the flow against the plug face. (Especially in the case of eccentric plug valve) for extended life.
3.When installed in high-pressure systems, it is recommended to have the plug seat on the outlet side of the valve. They may be installed vertically; however, whenever possible horizontal orientation is preferred.
4.When installed in a vertical line where solids exist, the seat is ideally positioned up, preventing solid build-up in the valve body.
Our Factory
Group has 5 subsidiary corporations, located in Anyang, Tianjin, Hongkong and Singapore countries and districts. Headquarters is in hometown of oracle in Henan province, location of world cultural heritage "Yin Ruin", Anyang city, one of eight ancient capitals of China.
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