Suitable for any environment: Resilient Seated Gate Valve SABS 664

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Suitable for Any Environment: Resilient Seated Gate Valve SABS 664.

If you need a valve that can handle diverse conditions in different industries, such as water supply, wastewater treatment, mining, and chemical processing, consider the resilient seated gate valve SABS 664. This valve is designed to provide reliable and cost-effective performance in a wide range of applications, thanks to its robust construction, flexible sealing, and easy maintenance. In this article, we will explain what makes the SABS 664 valve suitable for any environment and how it compares to other gate valves.

What Is Resilient Seating?

Before we dive into the details of the SABS 664 valve, let's clarify what we mean by "resilient seating." This term refers to a type of sealing mechanism used in gate valves, which involves an elastomeric material (usually rubber or EPDM) that covers the gate and conforms to the inner surface of the valve body when the gate closes. This creates a tight seal that prevents any leakage through the valve and reduces the torque required to operate the gate. The resilient seating also provides some resistance to abrasion and corrosion, as well as thermal or chemical shocks, which can affect the durability and performance of the valve.

What Are the Features of SABS 664 Valve?

The SABS (South African Bureau of Standards) 664 valve is a standard-compliant gate valve that meets the requirements of the SANS (South African National Standards) 664 specification. This specification defines the design, materials, testing, and marking of resilient seated gate valves for use in water supply and wastewater systems, as well as other industrial applications. The SABS 664 valve has several features that make it a reliable and versatile choice for different environments:

- Body: The valve body is made of ductile iron or cast steel, which is resistant to corrosion and abrasion, and can withstand high pressures and temperatures. The body has a flanged connection, which allows for easy installation and removal of the valve from the pipeline. The flanges can be drilled to various standards, such as the SANS 1123, ANSI B16.5, or BS EN 1092-2.

- Gate: The gate is also made of ductile iron or cast steel, and has a wedge shape that allows for full bore flow when open. The gate has a resilient sealing that can be either vulcanized or encapsulated, depending on the size and pressure rating of the valve. The sealing material is usually EPDM, which has good resistance to water, chemicals, and UV radiation.

- Stem: The stem is made of stainless steel or carbon steel, which is durable and easy to operate. The stem has a non-rising design, which means that it does not extend above the valve body and avoids any interference with other components.

- Bonnet: The bonnet is a part that covers the operating mechanism of the valve, such as the handwheel or gearbox. The bonnet is made of ductile iron or cast steel, and has a gasket that seals the interface between the bonnet and the body. The bonnet can be removed for maintenance or repair of the valve.

- Operating mechanism: The valve can be operated manually, by turning the handwheel or using a gear operator, or automated, by using an actuator or a hydraulic system. The operating mechanism provides a smooth and precise control of the gate position, which can be fully open, fully closed, or somewhere in between.

How Does SABS 664 Valve Compare to Other Gate Valves?

There are several types of gate valves available on the market, each with its own advantages and limitations. The most common types are the rising stem gate valve, the non-rising stem gate valve, and the knife gate valve. The SABS 664 valve belongs to the non-rising stem gate valve category, which means that it does not move up or down when the gate opens or closes. Rather, the stem rotates within the bonnet, which is fixed to the body. This design makes the valve more compact and easier to install in tight spaces, such as underground or inside a pump station. It also reduces the risk of stem damage or corrosion due to external conditions.

Compared to the knife gate valve, which has a sharp-edged gate that can cut through solids or fibrous material, the SABS 664 valve has a smooth and rounded gate that is less prone to clogging or jamming. However, the knife gate valve may be more suitable for some applications that require frequent cleaning or scraping of the gate, such as slurry handling or wastewater treatment.

Compared to the rising stem gate valve, which requires more clearance above the valve to accommodate the rising stem, the SABS 664 valve can operate in a narrower space and with less headroom. However, the rising stem gate valve may be more suitable for some applications that require visual indication of the valve position or remote control of the gate.

Conclusion.

In conclusion, if you need a gate valve that can handle any environment, consider the SABS 664 valve, which combines the features of robust construction, flexible sealing, and easy maintenance. This valve is designed to meet the standards of different industries and applications, and can be customized to meet your specific needs and preferences. Contact your local valve supplier or manufacturer to learn more about the SABS 664 valve and how it can benefit your operation.

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