Tanggong Valve Group is a leading valve manufacturer with over 30 years of experience. We specialize in gate valves, globe valves, check valves, ball valves, butterfly valves, forged steel valves, high-temperature valves, and more. Our products are designed and manufactured according to international standards including API, ASTM, ANSI, JIS, and CE.
With advanced production facilities, a modern R&D center, and a highly skilled workforce, we ensure the highest quality in all our products. We hold multiple certifications, including ISO9001, ISO14001, and CE, ensuring quality and reliability. Our valves serve a wide range of industries such as oil & gas, chemical, power generation, and construction, and are trusted by customers in over 20 countries.
A resilient seated gate valve consists of a wedge coated with a resilient material, such as rubber or elastomer, which compresses against the valve body to form a seal. This design allows the valve to accommodate minor imperfections in the sealing surfaces, ensuring a reliable and leak-proof closure. The primary purpose of these valves is to provide on/off control in pipelines, making them ideal for applications where a full, unobstructed flow is necessary when the valve is open.
Resilient seated gate valves are engineered to provide reliable, leak-proof sealing in fluid control systems. Their design incorporates a flexible, elastomeric seat that ensures a tight seal, effectively preventing leaks and maintaining system integrity.
The core mechanism of a resilient seated gate valve involves a wedge-shaped gate that moves vertically within the valve body to control fluid flow. This wedge is fully encapsulated with a resilient material, such as EPDM rubber, which compresses against the valve body when the valve is closed, creating a tight seal. This design allows the valve to accommodate minor imperfections in the sealing surfaces, ensuring a reliable and leak-proof closure.
The primary components of a resilient seated gate valve include:
Body: The main structure of the valve, typically made from ductile iron or cast iron, designed to withstand the pressure of the media flowing through the valve.
Bonnet: Attached to the body, the bonnet houses the stem and provides access to the internal parts of the valve for maintenance and repair.
Wedge (Gate): The moving part of the valve that controls the flow of media. In a resilient seated gate valve, the wedge is fully encapsulated with a resilient material, such as rubber, which forms a tight seal against the valve body when closed.
Stem: Connects the wedge to the actuator (e.g., handwheel or motor). It transmits the motion from the actuator to the wedge, allowing the valve to open or close.
Resilient Seat: The flexible material, usually rubber, that is bonded to the wedge or the valve body. It creates a tight seal when the valve is closed, preventing any leakage.
The resilient seat plays a crucial role in ensuring a leak-proof closure. When the valve is closed, the resilient material compresses against the valve body, forming a tight seal that prevents any fluid from passing through. The elasticity of the resilient material allows it to conform to any irregularities in the sealing surfaces, ensuring a bubble-tight shut-off.
Resilient seated gate valves are integral components in fluid control systems, offering several advantages that enhance their performance and suitability for various applications.
These valves are designed to provide a tight seal across a wide range of pressures, ensuring reliable operation even in fluctuating conditions. The flexible elastomeric seat adapts to minor imperfections, maintaining a leak-proof closure.
The straightforward construction of resilient seated gate valves facilitates easy disassembly and installation. The gate can be easily replaced without dismantling the entire valve, saving maintenance time and resources.
Primarily made from ductile cast iron, these valves are more economical than those crafted from cast steel or stainless steel. This cost advantage is particularly beneficial for projects requiring bulk procurement without compromising quality.
The elastomeric materials used in the sealing surfaces offer excellent resistance to corrosion and chemical damage, making these valves suitable for handling various media without degradation.
Resilient seated gate valves are versatile components widely used across various sectors due to their reliable sealing and durability.
In municipal water supply systems, resilient seated gate valves are essential for controlling the flow of potable water. Their robust construction and effective sealing capabilities ensure the safe and efficient distribution of water to communities.
These valves play a critical role in fire protection infrastructure, providing reliable isolation and control within fire suppression systems. Their corrosion-resistant materials and tight sealing properties are vital for maintaining system integrity and readiness.
Resilient seated gate valves are utilized in various industrial applications, including chemical processing and HVAC systems. Their ability to handle different fluids and gases, combined with their durability, makes them suitable for controlling flow in complex industrial pipelines.
In sewage and drainage systems, these valves are used to manage the flow of wastewater and stormwater. Their design allows for effective isolation and control, ensuring the proper functioning of municipal sewage and drainage infrastructure.
Selecting the appropriate resilient seated gate valve is crucial for ensuring optimal performance and longevity in your fluid control systems. Consider the following factors during the selection process:
Pressure Rating: Ensure the valve’s pressure rating meets or exceeds the maximum operating pressure of your system to prevent potential leaks or valve failure.
Temperature Range: Select a valve that can withstand the operating temperatures of your application. Resilient seated gate valves are typically suitable for temperatures up to 80°C (180°F).
Fluid Type: Consider the nature of the fluid—whether it’s water, wastewater, chemicals, or gases—to ensure compatibility with the valve’s materials and sealing properties.
Valve Body and Bonnet: Common materials include ductile iron and cast iron. Ductile iron offers higher tensile strength and impact resistance, making it suitable for demanding applications. Cast iron is more cost-effective but may be less durable under certain conditions.
Coatings: Fusion-bonded epoxy coatings enhance corrosion resistance, extending the valve’s service life, especially in aggressive environments.
Resilient Seat Material: The choice of elastomer (e.g., EPDM, NBR) affects the valve’s chemical compatibility, temperature tolerance, and sealing effectiveness.
Industry Standards: Ensure the valve complies with relevant standards such as AWWA C509 for water supply service, which specifies requirements for resilient-seated gate valves.
Certifications: Look for valves certified by recognized organizations like NSF/ANSI 61, indicating compliance with health effects requirements for materials in contact with drinking water.
Quality Assurance: Verify that the manufacturer adheres to quality management systems, such as ISO 9001, to ensure consistent product quality.
Stem Design: Decide between rising stem (OS&Y) and non-rising stem (NRS) designs based on installation space and visual indication of valve position. Rising stems are suitable for above-ground installations, while non-rising stems are ideal for underground applications.
Wedge Design: A fixed wedge nut design reduces the number of movable parts, minimizing the risk of corrosion and enhancing sealing performance.
End Connections: Choose between flanged, mechanical joint, or other end connections based on your piping system requirements.
Resilient seated gate valves are generally designed for applications with moderate temperature ranges. The elastomeric materials used for sealing typically have temperature limitations, often up to 80°C. Exceeding these temperatures can lead to degradation of the sealing material, resulting in leakage. For high-temperature applications, metal-seated gate valves or other valve types with appropriate sealing materials are recommended.
Resilient seated gate valves are primarily designed for clean, non-abrasive fluids. The elastomeric sealing materials may not withstand the wear and tear from abrasive particles, leading to potential damage and leakage. For handling abrasive media, valves with metal seats or specialized designs, such as knife gate valves, are more suitable due to their enhanced durability against abrasive conditions.
Resilient seated gate valves offer numerous advantages, including cost-effectiveness, superior sealing performance, and ease of maintenance. Their robust construction and reliable sealing capabilities make them ideal for applications such as water distribution networks, fire protection systems, industrial pipelines, and municipal sewage and drainage systems. To ensure optimal performance and longevity, it’s essential to consider factors like pressure rating, temperature range, fluid type, material selection, and adherence to industry standards when choosing the right valve for your needs. For a comprehensive selection of resilient seated gate valves tailored to various applications, explore our product catalog or contact us directly for personalized assistance and quotes.
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