There are various types of valves used in different industries, each with its own specific testing requirements. Some common types of valves include gate valves, globe valves, ball valves, butterfly valves, check valves, and pressure relief valves.
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Gate valves are commonly used for on/off applications and require testing for proper sealing and operation. Globe valves are used for regulating flow and require testing for proper throttling and sealing. Ball valves are versatile and require testing for proper sealing and operation. Butterfly valves are used for large flow applications and require testing for proper sealing and operation. Check valves are used to prevent backflow and require testing for proper sealing and operation. Pressure relief valves are used to protect equipment from overpressure and require testing for proper set pressure and operation.
Understanding the specific testing requirements for each type of valve is crucial to ensure their proper functioning. For example, gate valves may require a seat leakage test to check for any leaks when the valve is closed, while pressure relief valves may require a pop test to verify that they open at the correct pressure. By following the appropriate testing procedures, engineers can ensure that valves meet the necessary standards and specifications.
Safety should always be a top priority when conducting valve testing. Valves are often subjected to high pressures and temperatures, which can pose significant risks if proper safety measures are not followed. Before conducting any testing, it is important to assess the potential hazards and implement appropriate safety measures.
Some common safety measures include wearing personal protective equipment (PPE), such as gloves, safety glasses, and protective clothing, to protect against potential injuries. Additionally, ensuring that the testing area is properly ventilated can help prevent exposure to harmful gases or fumes. It is also important to have emergency procedures in place in case of any accidents or incidents during testing.
Before conducting valve testing, it is essential to perform equipment checks and maintenance. This includes inspecting the testing equipment for any damage or defects, ensuring that all connections are secure, and verifying that all necessary components are in working order. Regular maintenance of testing equipment is crucial to ensure accurate and reliable results.
Proper setup and calibration of testing equipment is also important to ensure accurate results. This includes calibrating pressure gauges, flow meters, and other measuring devices to ensure they are reading correctly. It is also important to ensure that the testing equipment is properly connected to the valve being tested and that all connections are tight and secure.
There are several methods available for testing valves, each with its own advantages and disadvantages. The choice of testing method depends on various factors, including the type of valve, the specific testing requirements, and the available resources.
One common method of valve testing is visual inspection. This involves visually examining the valve for any visible defects or damage. Visual inspection can be a quick and cost-effective method, but it may not be sufficient for detecting internal defects or issues that are not visible to the naked eye.
Another method is functional testing, which involves operating the valve to ensure that it functions properly. This can include opening and closing the valve, adjusting the flow rate or pressure, and checking for any leaks or abnormal behavior. Functional testing provides a more comprehensive assessment of the valve’s performance but may require specialized equipment and expertise.
Pressure testing is another commonly used method for valve testing. This involves subjecting the valve to a specified pressure to check for any leaks or failures. Pressure testing can be conducted using water, air, or other suitable fluids. It provides a quantitative measure of the valve’s ability to withstand pressure but may not detect other types of defects, such as internal corrosion or wear.
Other methods of valve testing include leak testing, which involves checking for any leaks in the valve or its components, and actuation testing, which involves testing the valve’s ability to open and close properly. Each method has its own advantages and disadvantages, and the choice of method depends on the specific requirements of the valve being tested.
Pressure testing is a commonly used method for evaluating the performance and integrity of valves. It involves subjecting the valve to a specified pressure to check for any leaks or failures. Accurate results are crucial to ensure that valves meet the necessary standards and specifications.
To ensure accurate results in pressure testing, it is important to follow certain tips and best practices. First, it is important to select the appropriate test pressure based on the valve’s design and intended application. The test pressure should be sufficient to evaluate the valve’s performance but should not exceed its maximum allowable working pressure.
It is also important to ensure that the testing equipment is properly calibrated and maintained. This includes calibrating pressure gauges, flow meters, and other measuring devices to ensure they are reading correctly. Regular maintenance of testing equipment is crucial to ensure accurate and reliable results.
Proper setup and preparation are also important in pressure testing. This includes ensuring that all connections are tight and secure, and that the valve being tested is properly installed and aligned. Any leaks or loose connections can affect the accuracy of the test results.
During the pressure test, it is important to monitor the pressure closely and record any changes or deviations. This can help identify any potential issues or leaks in real-time. It is also important to conduct a thorough visual inspection of the valve and its components before and after the pressure test to check for any visible defects or damage.
Leak testing is an essential part of valve testing, as even small leaks can have significant consequences in terms of safety, reliability, and efficiency. Leak testing involves checking for any leaks in the valve or its components using various techniques.
One common technique for leak testing is visual inspection. This involves visually examining the valve for any visible signs of leaks, such as dripping or wet spots. Visual inspection can be a quick and effective method for detecting leaks, especially in external components or connections.
Another technique is bubble testing, which involves applying a soapy solution to the valve or its components and looking for any bubbles that indicate a leak. This method is particularly useful for detecting small leaks or leaks in hard-to-reach areas.
Pressure decay testing is another commonly used technique for leak testing. This involves pressurizing the valve and monitoring the pressure over a period of time. Any decrease in pressure indicates a leak. Pressure decay testing can be conducted using air or other suitable fluids.
Other techniques for leak testing include helium leak testing, which involves using helium gas to detect leaks, and ultrasonic testing, which uses sound waves to detect leaks. Each technique has its own advantages and disadvantages, and the choice of technique depends on the specific requirements of the valve being tested.
Once a leak is detected, it is important to fix it promptly to ensure the proper functioning of the valve. This may involve tightening loose connections, replacing damaged seals or gaskets, or repairing any defects or damage. It is important to follow the manufacturer’s recommendations and guidelines for repairing leaks to ensure that the valve is restored to its proper working condition.
Valve actuation testing is an important part of valve testing, as it ensures that valves are functioning properly and can open and close as intended. Valve actuation refers to the process of operating the valve to control the flow of fluids through pipes and other passageways.
There are various techniques for testing valve actuation, depending on the type of valve and its intended application. One common technique is manual actuation testing, which involves manually opening and closing the valve using a handwheel or lever. This can help assess the valve’s ability to operate smoothly and without any sticking or binding.
Another technique is motorized actuation testing, which involves using a motor or actuator to open and close the valve. This can help evaluate the valve’s response time, torque requirements, and overall performance under different operating conditions.
For valves that require precise control, such as control valves used in process industries, it may be necessary to conduct performance testing. This involves measuring various parameters, such as flow rate, pressure drop, and response time, to ensure that the valve is meeting the required specifications.
Valve actuation testing is important to ensure that valves are functioning properly and can perform their intended functions. It helps identify any issues or defects that may affect the valve’s performance, such as sticking, binding, or excessive wear. By conducting thorough actuation testing, engineers can ensure that valves meet the necessary standards and specifications.
Calibration and verification are essential in maintaining accurate test results in valve testing. Calibration refers to the process of adjusting and verifying the accuracy of testing equipment, such as pressure gauges, flow meters, and temperature sensors. Verification refers to the process of confirming that the testing equipment is functioning properly and providing accurate results.
Regular calibration of testing equipment is crucial to ensure accurate and reliable test results. Over time, testing equipment may drift or deviate from its original calibration, leading to inaccurate measurements. By calibrating the equipment at regular intervals, engineers can ensure that it is reading correctly and providing accurate results.
Calibration should be performed by qualified personnel using traceable standards and procedures. This ensures that the calibration process is consistent and reliable. It is also important to keep records of all calibration activities, including the date of calibration, the standard used, and the results obtained. This helps maintain a history of calibration activities and provides evidence of compliance with applicable standards and regulations.
In addition to calibration, it is important to verify the performance of testing equipment on an ongoing basis. This can be done through regular checks and inspections to ensure that the equipment is functioning properly and providing accurate results. Any deviations or abnormalities should be investigated and addressed promptly to maintain the integrity of test results.
Regular maintenance of testing equipment is also important in maintaining accurate test results. This includes cleaning, lubricating, and inspecting the equipment for any damage or defects. Any worn or damaged components should be replaced promptly to ensure the proper functioning of the equipment.
Documentation and reporting are essential in valve testing to maintain accurate and detailed records of the testing process. This includes recording all relevant information, such as the date and time of testing, the type of valve tested, the testing method used, and the results obtained.
Accurate documentation is important for several reasons. First, it provides a record of compliance with applicable standards and regulations. This can be useful in demonstrating that valves have been tested and meet the necessary requirements. Second, it provides a reference for future maintenance or troubleshooting activities. By documenting the testing process, engineers can easily refer back to previous test results and identify any trends or patterns.
Best practices for record-keeping in valve testing include using standardized forms or templates to ensure consistency and completeness. This can help ensure that all necessary information is recorded and that nothing is overlooked. It is also important to keep records organized and easily accessible, either in hard copy or electronic format.
In addition to documentation, it is important to report the test results accurately and clearly. This includes summarizing the findings, identifying any issues or defects, and recommending any necessary actions or follow-up activities. The report should be concise but comprehensive, providing all relevant information in a clear and understandable manner.
Valve testing can present various challenges that can affect the accuracy and reliability of test results. It is important to be aware of these challenges and to have strategies in place to overcome them.
One common challenge in valve testing is ensuring representative samples. Valves are often produced in large quantities, and it may not be feasible or practical to test every single valve. Instead, a representative sample is selected for testing. It is important to ensure that the sample accurately represents the population of valves being tested. This can be achieved through proper sampling techniques and statistical analysis.
Another challenge is the complexity of testing procedures and requirements. Valve testing can involve multiple steps and procedures, each with its own specific requirements. It is important to have a clear understanding of the testing procedures and to follow them accurately. This may require specialized training or expertise.
Equipment limitations can also pose challenges in valve testing. Testing equipment may have limitations in terms of pressure range, temperature range, or other factors. It is important to be aware of these limitations and to select the appropriate equipment for the specific testing requirements. If necessary, additional equipment or modifications may be required to overcome these limitations.
Environmental factors can also affect valve testing. Valves are often subjected to extreme conditions, such as high temperatures, corrosive environments, or high vibration levels. It is important to consider these factors and to simulate them as accurately as possible during testing. This may require specialized equipment or test setups.
Finally, time constraints can be a challenge in valve testing. Testing schedules may be tight, and there may be pressure to complete the testing quickly. However, it is important not to rush the testing process and to ensure that all necessary steps and procedures are followed. Cutting corners or skipping steps can compromise the accuracy and reliability of test results.
In conclusion, valve testing is a critical process in ensuring the safety and reliability of valves used in various industries. It involves identifying potential issues, ensuring proper functionality, and maintaining accurate test results. By following best practices and implementing appropriate testing methods, engineers can ensure that valves meet the required standards and perform optimally in their intended applications. Some key best practices for effective valve testing include conducting regular inspections, using calibrated equipment, following standardized testing procedures, and documenting all test results. Additionally, it is important to involve experienced personnel who are knowledgeable about valve testing and can accurately interpret test data. By adhering to these best practices, industries can minimize the risk of valve failure, improve operational efficiency, and enhance overall safety.
INTRODUCTION:
Gate Valves (also known as knife valves or slide valves) are linear motion valves in which a flat closure element slides into the flow stream to provide shut-off. They are one of the most common valves used. Gate valves are advantageous in applications involving slurries, as their “gates” can cut right through the slurry, is pointed out by a Gate Valves Supplier. They are designed to minimize pressure drop across the valve in the fully opened position and stop the flow of fluid completely. The direction of fluid flo w does not change, and the diameter through which the process fluid passes is essentially equal to that of the pipe. Hence, they tend to have minimal pressure drop when opened fully.
Gate valves are designed for fully open or fully closed service. They are installed in pipelines as isolating valves, and should not be used as control or regulating valves.
TYPES OF GATE VALVES:
Gate valves are usually divided into the following types:
The parallel gate valves: These valves use a flat disc gate between two parallel seats, upstream and downstream. Shut-off is obtained by the free-floating seat or disk gate allow the upstream pressure to seal the seat and disk against any unwanted seat leakage. This is why most of the Valve Manufacturers prefer a design of the parallel gate valves that allows the seat to be spring-energized by an elastomer that applies constant pressure to the disk gate seating surface.
• Knife valves are a specific type of parallel gate valve. They have a sharp edge on the bottom of the gate to shear entrained solids or separate slurries.
• The through-conduit gate valves have a rectangular closure element. The closure has a circular opening equal to the full-area flow passageway of the gate valve; as the element is lowered the opening is exposed to the flow. Raising the element shuts off the flow. In this design the seating surface of the gate is in contact with the gate at all times.
Wedge-shaped gate valves: use two inclined seats and a slightly mismatched inclined gate, allowing for tight shut-off.
Disk flexibility is inherent to the split wedge design. This flexibility allows the split wedge to seal more easily and it reduces stickiness between the sealing surfaces in cases where the valve seats are angularly misaligned. The mismatched angle is also designed with some free movement to allow the seating surfaces to match with each other as the actuator forces them closed. It is also best used for handling non-condescending gases and liquids at normal temperatures, particularly corrosive liquids.
• Solid wedges are the most common because of their simplicity and strength. They can be installed in any position, are suitable for almost all fluids, and are practical for turbulent flow.
• Flexible wedge gate valves are commonly used in steam systems. The disk is one piece with a cut around the perimeter to improve the ability to match error or change the angle between the seats. Different sizes, shapes, and depths are available.
APPLICATIONS OF GATE VALVES:
Gate valves are used in many industrial applications including the oil and gas industry, pharmaceuticals, manufacturing, automotive, and marine wherein standardized valves are widely preferred.
• Gate valves are widely used for all types of applications and are suitable for both above ground and underground installation.
• Gate valves most commonly the Valves Made in Europe are designed for fully open or fully closed service and are preferably installed in pipelines as isolating valves, and should not be used as a control or regulating valves.
• Gate valves can be used in demanding environments such as high temperature and high pressure environments. They are often seen in power plants, water treatments, mining, and offshore applications.
FEATURES OF GATE VALVES:
• The body of a gate valve holds all of the operational parts of the valve. It is connected to the system with one of the mounting options below. The mounting option should be selected based on the current system mounting features and the type and size of the media.
• The bonnet of a gate valve contains the moving parts and is attached to the valve body. The bonnet can be removed from the body in order to allow for maintenance and replacing parts.
• The trim of a gate valve contains the functioning pieces of the valve: the stem, the gate, the disc or wedge, and the seat rings.
TO SUMMARIZE:
It is important to consider the size of the valve and system when selecting a gate valve. This is especially true if the valve uses a rising stem. Most of the time gate valves should be installed horizontally with the manual actuator in the top position. This allows for easy access for maintenance and replacing parts.
For industrial applications, the gate valve is one of the most versatile valves with a simple working mechanism. There are many Gate Valve Supplier around the world and we Fevisa, one of the leading valve stockist in UAE, we export different types of valves to various industries.
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In the intricate network of water supply systems, gate valves play a pivotal role in regulating the flow of water. Proper selection and understanding of these valves are crucial for ensuring efficient and reliable water distribution. Here’s a concise guide to grasp the essentials of gate valve selection:
Gate valves control water flow by either fully opening or closing the gate within the valve.
They offer a tight seal when fully closed, preventing water leakage.
Rising stem and non-rising stem are two common types, each with distinct operating mechanisms.
Rising stem valves visually indicate the position of the gate, while non-rising stem valves are more compact.
Gate valves come in various materials like brass, stainless steel, and cast iron, suitable for different applications.
Material selection is crucial to resist corrosion and ensure longevity.
Understanding these key aspects is vital when deciding on the ideal gate valve for water line systems. Whether for municipal water supplies or industrial applications, a well-informed decision ensures optimal performance. Consider a Gate Valve for Water Line that aligns seamlessly with your project’s demands.
In the realm of water system management, the selection of gate valves plays a pivotal role in ensuring efficient flow control. Gate valves are indispensable components that regulate the passage of water, making it crucial to align their types with the specific demands of the system. Here’s a concise overview of the key considerations:
Rising vs. Non-Rising Stem: Choosing between these stems depends on the available space and accessibility for valve installation and maintenance.
Solid Wedge vs. Flexible Wedge: Solid wedges offer robust sealing in clean fluids, while flexible wedges adapt well to non-uniform substances, enhancing performance in varying water compositions.
Metal Seated vs. Resilient Seated: The decision hinges on the application’s temperature, pressure, and the need for a tight seal, with metal-seated valves excelling in high-stress environments.
Bi-Directional vs. Uni-Directional Flow: Consider the desired flow characteristics, ensuring the valve type aligns with the water system’s directional requirements.
Ensuring the optimal gate valve for a water line is essential for long-term reliability and efficiency. Implementing the right valve not only guarantees smooth flow control but also contributes to the overall effectiveness of the water system. When selecting gate valves for your water line, prioritize precision and durability, ensuring a seamless and dependable water management infrastructure.
Selecting the right size for gate valves is crucial to ensure optimal performance in various applications, particularly in water lines. Proper sizing not only enhances efficiency but also extends the lifespan of the gate valve. Here are key considerations for achieving the best results:
Flow Rate: Determine the expected flow rate of the water line, accounting for peak demand and variations. This ensures the gate valve can handle the required volume without compromising performance.
Pipe Diameter Compatibility: Match the gate valve size with the diameter of the connected pipes. A well-matched size prevents turbulence and pressure drops, maintaining a smooth flow within the water line.
Pressure Ratings: Evaluate the pressure requirements of the water system. Select a gate valve with a pressure rating that aligns with or exceeds the maximum operating pressure to avoid potential leaks or valve failure.
Material Selection: Consider the material of the gate valve, ensuring it can withstand the conditions of the water line. Corrosion-resistant materials are essential for longevity, especially in water applications.
Installation Environment: Assess the available space for installation. Optimal sizing takes into account spatial constraints, facilitating a seamless integration into the water line.
Choosing the right gate valve size is fundamental for efficient water flow management, and a well-sized valve significantly contributes to the longevity of the entire system. When it comes to water lines, ensure the gate valve for water line applications is appropriately sized to guarantee reliable performance and longevity.
Choosing the appropriate material for your water line gate valve is crucial for ensuring optimal performance, longevity, and resistance to various environmental factors. The gate valve serves as a vital component in controlling the flow of water, making material selection a key consideration. Here’s a comprehensive guide to help you make an informed decision:
Corrosion Resistance: Opt for materials like stainless steel or brass to enhance resistance against corrosion, preventing deterioration over time.
Durability: Prioritize durable materials such as cast iron or ductile iron for long-lasting performance, reducing the need for frequent replacements.
Pressure Rating: Consider the water pressure requirements of your system and choose materials that can withstand the specific pressure levels without compromising functionality.
Temperature Tolerance: Evaluate the temperature conditions of your water system, selecting materials that can handle both extreme cold and heat to maintain reliable operation.
Cost-effectiveness: Balance material quality with cost considerations to ensure you get the best value for your investment.
When it comes to securing a reliable and efficient water line gate valve, prioritize the longevity and performance of your system by carefully selecting the appropriate materials. A Gate Valve for Water Line should not only meet your immediate needs but also stand the test of time in diverse environmental conditions.
Water systems rely heavily on efficient gate valves to control the flow and pressure within pipelines. Understanding the dynamics of water pressure is crucial when making decisions about gate valve selection. Here’s a concise guide to consider the pressure points in the context of gate valve decision-making:
Operating Pressure Range: Gate valves are designed to operate within specific pressure ranges. Assess the water pressure requirements of your system to ensure the selected gate valve can handle the intended operating conditions.
Material Durability: Different materials offer varying resistance to pressure. Evaluate the material composition of the gate valve in relation to the expected water pressure to guarantee longevity and reliability.
Sealing Mechanism: The effectiveness of a gate valve’s sealing mechanism plays a pivotal role in maintaining Pressure Control. Opt for gate valves with robust sealing systems that can withstand the pressures encountered in your water line.
Pressure Surges: Consider potential pressure surges within the water system. Gate valves with features like anti-shock designs can mitigate the impact of sudden pressure changes.
When choosing a gate valve for a water line, it’s imperative to align the valve’s specifications with the system’s pressure demands. A gate valve that seamlessly integrates with the water pressure parameters ensures optimal performance and longevity in your water distribution network.
In selecting gate valves for water lines, considering environmental factors is crucial to ensure optimal performance and longevity. The external conditions surrounding water systems can significantly influence the choice of gate valves, affecting their efficiency and durability. Here’s a brief overview of key environmental considerations:
Temperature Extremes: Gate valves for water lines must withstand temperature variations. Extreme cold or heat can impact the valve’s materials and operational integrity.
Corrosive Environments: For areas prone to corrosion, such as coastal regions or industrial settings, corrosion-resistant materials like stainless steel or brass are preferred to enhance the gate valve’s lifespan.
Underground Installations: Gate valves installed underground face unique challenges, including soil conditions and moisture levels. Choosing valves with durable coatings and proper sealing mechanisms is essential for longevity and efficient operation.
Water Quality: The quality of water flowing through the line can impact valve materials. In situations with aggressive water composition, selecting gate valves resistant to chemical corrosion is imperative.
Pressure Fluctuations: Gate valves must handle varying water pressures. Understanding the system’s pressure dynamics helps choose valves with appropriate pressure ratings to prevent leaks or malfunctions.
Selecting the right gate valve for water lines involves a meticulous evaluation of these environmental factors to ensure reliability and longevity in diverse conditions. Gate valves designed to withstand the specific challenges posed by external conditions contribute to the overall efficiency and sustainability of water distribution systems.
In the realm of water distribution systems, gate valves play a pivotal role in regulating and controlling the flow of water. The choice of Gate Valve Design significantly influences operational efficiency, ensuring a smooth and reliable water flow within pipelines. When evaluating gate valve designs for water lines, several key factors come into play:
Material Selection: Optimal gate valve performance depends on the material used. Stainless steel and ductile iron are popular choices for their durability and resistance to corrosion.
Design Configuration: Different gate valve designs, such as wedge, knife, and parallel gate valves, offer varied benefits. The right configuration depends on the specific requirements of the water distribution system.
Sealing Mechanism: The effectiveness of the sealing mechanism directly impacts leak prevention. Resilient seated gate valves provide a tight seal, reducing the risk of water wastage.
Size and Pressure Rating: Matching the gate valve size and pressure rating to the system’s needs ensures efficient water flow without compromising structural integrity.
Considering these factors in the selection process contributes to enhancing overall operational efficiency in water distribution systems. When seeking optimal gate valve solutions for water lines, prioritizing the right design is crucial for maintaining a consistent and controlled water flow.
In the realm of fluid control systems, choosing the right gate valve for water lines involves a delicate balance between budget constraints and ensuring optimal quality. A comprehensive cost analysis becomes crucial in this decision-making process, as it directly impacts the overall efficiency and longevity of the water distribution system. Here’s a breakdown of key considerations:
Material Quality: Evaluate the materials used in gate valve construction to ensure durability and resistance to corrosion, factors critical for prolonged service life in water lines.
Operational Efficiency: Assess the valve’s design and functionality to guarantee smooth operations, minimizing the risk of malfunctions or disruptions within the water distribution network.
Installation and Maintenance Costs: Consider upfront installation expenses and ongoing maintenance requirements. While cost-effective options may seem appealing initially, long-term expenses should be factored in for a more accurate financial assessment.
Compliance with Standards: Ensure that the selected gate valve adheres to industry standards and regulations, guaranteeing its suitability for water line applications and minimizing the risk of non-compliance issues.
A gate valve for water lines must strike the right balance between affordability and reliability. By conducting a thorough cost analysis, stakeholders can make informed decisions that prioritize both budget constraints and the high-quality standards essential for a sustainable water distribution system.
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Gate Valve Types: Applications, Benefits, and Choosing the Right One
When you’re putting in valves, especially underground, it is crucial to make sure you choose the right one for your application. Getting the wrong type of valve can result in high replacement costs and a lot of lost time. Gate valves are one of the best options for many above and below-ground applications.
There are a few different gate valve types to choose from. Picking the right one is a matter of knowing what you need in terms of temperature and pressure ratings. Read on to learn about the gate valve types, their applications, and benefits.
You can find gate valves in a wide variety of applications both above and below ground. They are used when you need a free bore and minimum pressure loss. A fully open gate valve has no obstruction in the flow path, so you can use a pipe cleaning pig on it.
Gate valves may be used for all types of fluids, including water and gas. They may be used with potable water, wastewater, and neutral liquids between -20 and 70 degrees Celsius. They can also be used with gases between -20 and 60 degrees Celsius with a maximum of 20 m/s flow velocity.
Because gate valves have no obstruction in the flow path, there is very low pressure loss. These are also multi-turn valves, where you must turn the valve multiple times to take it from open to closed. This slow opening and closing prevents water hammer effects.
Gate valves tend to be bidirectional, meaning they can sit on either side of the gate. This helps provide enough tightness for a good seal and prevents any solids from blocking the valve from sealing completely. They can also be fitted on the end of the line for a solid seal.
There are a few different types of gate valves for you to choose from. The two main types are parallel vs. wedge-shaped valves.
Parallel valves use a flat gate between two parallel seats to provide a tight seal. They may have a sharp edge at the bottom of the gate; this kind is called a knife gate valve.
Wedge-shaped valves have a slightly mismatched inclined gate and two inclined seats. These are best used in moderate pressure-temperature applications to prevent the wedges from getting stuck due to metal expansion.
Gate valves are a popular option for a variety of different applications. Knowing your gate valve types will help you pick the best one for the job.
If you’d like to find the best valves for your jobs, check out the rest of our site at CPV Manufacturing. We have all varieties of valves and fittings for every application you need. Check out our product selection guide to find the perfect tools for the job.
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