Because of these issues, gate valves are better suited for applications where they are either fully open or fully closed. For throttling purposes, other types of valves, such as globe valves or ball valves, are typically more appropriate.

Renowned for their durability and reliability, gate valves are indispensable in water and wastewater management, oil and gas, and fire protection systems, where precise flow isolation is paramount.

JOHN gate valves have been an important part of Australian infrastructure for over 100 years. These valves commonly feature in industrial piping where flow isolation is essential in comparison to flow regulation. When a gate valve is fully open, flow is free without any resistance, allowing for minimal pressure drop.

Gate valves are not typically used to regulate flow in intermediate positions because partially opening or closing the gate can cause uneven wear, leading to leaks and reduced lifespan. Additionally, in partially open positions, the gate can vibrate due to the fluid flow, which may cause damage over time. The design of a gate valve makes it ideal for applications where a full open or closed position is needed, ensuring reliable operation and minimal resistance when fully open.

Gate valves are generally not recommended for throttling. Although they can be used to control flow by partially opening or closing the gate, this practice can cause several problems:

Our commitment to industry to supply quality gate valves, we have made these technical sheets available. If you need further information or can’t find the sheet you need, please make a technical enquiry.

By following these maintenance steps, you can extend the life of your gate valve and ensure it continues to function effectively in your system. Regular maintenance also helps prevent unexpected failures, which can lead to costly repairs or downtime.

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To close the valve, the handwheel or actuator is turned in the opposite direction, causing the gate to lower back into the path of the fluid. As the gate descends, it gradually restricts and eventually stops the flow when it is fully seated at the bottom of the valve. This creates a tight seal, preventing any fluid from passing through.

A gate valve uses a flat or wedge-shaped gate that moves up and down to open or close the valve. When fully open, the gate is lifted entirely out of the flow path, allowing fluid to pass through with minimal resistance. However, gate valves are generally slower to operate because the gate needs to move up or down multiple turns to fully open or close, making them less ideal for quick shutoff situations. They are also more prone to wear and leakage if used to regulate flow, as they are best suited for applications where the valve is either fully open or fully closed.

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Solenoid valve

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Gate valves, integral components in industrial fluid control, play a crucial role in regulating the flow of liquids and gases in various systems. Characterised by their simplistic yet effective design, these valves operate by inserting a gate or wedge into the path of the flowing medium, allowing for a clear and unobstructed passageway when fully open and a secure seal when closed.

What is a valve

While gate valves provide minimal flow resistance and a tight seal, they are not suitable for applications requiring frequent operation or flow regulation, as the design of the gate can lead to wear and tear over time.

Throttling with a gate valve in high-pressure systems can lead to cavitation, where vapor bubbles form and collapse within the fluid. Cavitation can cause significant damage to the valve and the piping system.

6. Stainless SteelProvides excellent resistance to corrosion and is used for applications handling corrosive fluids, chemicals, or high temperatures.

Furthermore, our design process incorporates extensive testing and refinement phases, ensuring every gate valve performs reliably under diverse and challenging operational conditions. This meticulous attention to detail guarantees that our valves deliver optimal functionality, safety, and longevity, reducing the need for frequent maintenance and replacements.

Butterfly valve

3. Poor Flow ControlGate valves are designed primarily for on/off control, so they don’t provide precise flow regulation. The design of the gate doesn’t allow for smooth, incremental adjustments, which can make it difficult to achieve a specific flow rate.

At the core of our range lies a commitment to excellence in design and engineering, a hallmark of our dedication to quality and innovation. Our valves are the product of meticulous design processes integrating advanced engineering principles with practical industry insights.

The engineering prowess behind our range and is evident in their precise fluid control capabilities. We employ quality materials and cutting-edge fabrication techniques to create valves that offer robustness, longevity, and adaptability across various mediums – from water and gas to oil and chemicals. Each component of our gate valves is optimised for efficiency and durability, from the resilient seals to the robust body construction.

Gate valves are primarily used for on/off control, where the valve needs to be either fully open or fully closed rather than regulating the flow. They are commonly found in systems where isolation is required, such as in water supply systems or pipelines, to allow for maintenance, repairs, or to shut off the flow in emergencies. Due to their ability to withstand significant pressure drops when fully closed, gate valves are often used in high-pressure environments, including the oil and gas industry, where they control the flow of crude oil, natural gas, and other fluids.

Check valve

Partially opening a gate valve can create turbulence and vibration within the valve. This vibration can cause further damage to the gate and other internal components, reducing the valve’s lifespan.

This binary functionality makes them ideal for applications where flow must be completely halted or allowed freely rather than for fine flow control or throttling. Gate valves come in various types, including cast steel, forged steel, cast iron, and bronze, each tailored to specific industrial needs and conditions.

9. Chrome Molybdenum SteelOften used in high-temperature environments like power plants or petrochemical industries due to its strength and heat resistance.

On the other hand, a ball valve uses a spherical ball with a hole through the center. The valve opens and closes by rotating the ball 90 degrees. When the hole aligns with the pipe, the valve is open, and fluid flows through. When the ball is rotated so the hole is perpendicular to the pipe, the valve is closed, and the flow is stopped. Ball valves are known for their quick operation, durability, and tight seal, even after long periods of disuse. They are also easier to operate and are suitable for both on/off control and throttling, although they are typically better for the former. However, they are generally more expensive than gate valves and can be bulkier.

A gate valve works by using a flat or wedge-shaped disk, known as a gate, to control the flow of fluid through a pipe. When the valve is opened, turning a handwheel or actuator lifts the gate vertically out of the fluid’s path, allowing it to flow freely through the valve with minimal resistance. In this fully open position, the fluid experiences maximum flow.

A gate valve and a ball valve are both used to control the flow of fluids, but they operate differently and are suited to different applications.

When a gate valve is partially open, the fluid flow can cause the gate and the seating surfaces to wear unevenly. This uneven wear can damage the sealing surfaces, leading to leakage when the valve is fully closed.

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These advantages make gate valves a popular choice for many industrial and residential applications, particularly where a reliable shutoff and minimal flow resistance are required.

In summary, the main differences lie in their operating mechanisms, speed of operation, and suitability for specific applications. Gate valves are better for applications requiring infrequent operation and minimal flow resistance, while ball valves are preferred for quick shutoff, ease of use, and a reliable seal.

Maintaining a gate valve is essential to ensure its longevity and reliable performance. Proper maintenance involves regular inspection, cleaning, and, if necessary, repairing or replacing parts. Here’s a guide to maintaining a gate valve:

Globe valve

8. PVC (Polyvinyl Chloride)Used for light-duty and lower-pressure applications, especially in water and chemical handling.

Gate valves can be made from a variety of materials, depending on the application and the type of fluid they control. Common materials for gate valves include:

A gate valve is a type of valve used to control the flow of liquids or gases through a pipe. It operates by lifting a gate, which is a flat or wedge-shaped disk, out of the path of the fluid. When the gate is fully raised, the valve is completely open, allowing for unimpeded flow. Conversely, when the gate is fully lowered, the valve is closed, stopping the flow entirely.

Our team of industry experts and engineers are here to help you find the right valve for your project. Our engineers are expereinced with working with external teams to design or modify gate valves to suit your needs.