Rising Stem Gate Valve vs Non-Rising Stem Gate Valve: What Sets Them Apart?

Understanding the difference between Rising Stem gate valves and Non-Rising Stem gate valves is crucial when choosing the right gate valve. While their basic functions are similar, differences in design and operation make each more suitable for specific application scenarios. 

This article will delve into the key differences between these two types of gate valves to help you make a more informed choice, whether it's in industrial piping or other critical applications.

The Rising Stem Gate Valve utilizes a stem with a lifting mechanism. When the valve opens or closes, the stem rises or falls with the action of the valve plate.

API600 OS&Y Cast Steel Gate Valve

Key Features of the Rising Stem Gate Valve

Stem visualization: This shows how the stem rises or falls. You can see if the valve is open or closed. This is helpful for operators.

Good sealing performance: The rising stem gate valve seals well. It is good for high pressure and high temperature uses. The sealing structure between the valve plate and the valve seat ensures that there is virtually no leakage when closed.

Smooth opening and closing: The valve plate moves in a straight line. This makes the opening and closing of a rising stem gate valve smooth. It does not create large shocks.

Simple structure: The rising stem gate valve has a simpler design than other valves. This makes maintenance and repair easier.

Wide range of application: This type of valve is used in many pipelines for different fluids, like water, oil, and gas. It is especially useful in situations that need full opening or closing.

Stem Rise: A key feature of the rising stem gate valve is that the stem moves up or down with the valve. This allows you to see the valve's status while it is being opened or closed.

Good for High Flow: Rising stem gate valves work well in high flow piping systems. They are great for steady flow control.

The Rising Stem Gate Valve has really performed reliably in some industrial applications, especially in large piping systems. For example, in some water treatment projects, 

the use of this gate valve ensures precise and stable flow control. Its lifting stem lets the operator see if the valve is open or closed. This is important for both on-site work and remote monitoring.

Especially for applications requiring high pressure and good sealing performance, the rising stem gate valve provides an ideal solution. While its on/off operation is smooth, 

these valves may need more care during installation and maintenance. This is especially true in tough environments or with larger pipe sizes.

And, it is critical to regularly inspect the stem and sealing surface of the rising stem gate valve. If resistance or leakage occurs during operation, the valve may need to be adjusted or parts replaced.

The Non-Rising Stem Gate Valve is a common type of gate valve. It is different from the Rising Stem Gate Valve. In this valve, the stem does not rise when opening or closing. Instead, it is fixed to the valve body and only rotates or moves in a straight line.

People often use this valve in tight spaces. It is also used where the valve stem should not be exposed. Additionally, this valve suits applications where users fix its position.

BS5163 Resilient Seated Non-Rising Stem 

Key Features of the Non-Rising Stem Gate Valves

Stem Fixed: The stem of a non-rising stem gate valve does not rise or fall during the opening and closing of the valve. The stem is usually fixed inside the valve. It controls the gate's opening and closing by rotating or moving back and forth.

Space saving: The valve stem stays down, making it great for places with limited installation space. Especially in underground, inside walls or in areas with dense equipment, non-rising stem gate valves can save a lot of space.

Suitable for deeply buried pipelines: Non-rising stem gate valves are great for underground installations. They do not require the valve stem to be exposed.

Pollution prevention: The valve stem is not exposed. This helps keep outside contaminants from entering the valve and improves sealing.

Easy maintenance: Although it has a fixed stem, the overall structure is simple and easy to operate and maintain. For long-term use of the equipment, maintenance is more convenient.

Good sealing: Non-rising stem gate valves have strong sealing performance. They are great for fully opening and closing fluids. The valve plate is in close contact with the valve seat during closing to prevent leakage.

Scope of application: It is commonly used in industrial pipelines. This is especially true for cases where the valve does not need to open or close often, or stays closed for a long time.

High stability: This type of gate valve is very durable. It works well in places that need long-lasting use and rare operation

The Non-Rising Stem Gate Valve is often used in tight spaces or where stable operation is needed for a long time. 

For example, in underground piping systems or small areas, these valves save space. They also prevent the hassle of rising stems. In these cases, the stem-retained design is great for places where the valve needs protection from the weather. It also helps prevent stem wear and pollution .Maintaining and adjusting the non-rising stem gate valve is easy. 

However, it is important to check it regularly. The sealing part can age and wear out over time, so it needs inspection and replacement. This is especially important when used in high temperature and high pressure environments.

Below is a comparison table of the two different types of valves:

Which type of valve is better suited to your application

If you need to choose between a rising stem gate valve and a non-rising stem gate valve, it depends on your project. If you have plenty of space and need to check the valve often, a rising stem gate valve is a good choice. Its rising stem lets you see if the valve is open or closed easily.

On the other hand, if space is tight, like in underground piping or crowded areas, a non-rising stem gate valve is better. It has a simpler design with a fixed stem, which saves space and works well for long-term use.

In general, a rising stem gate valve is best for large spaces and frequent use. A non-rising stem gate valve is better for small spaces and less frequent use. Your final choice should match your specific needs.

If you have any other questions, please feel free to contact our valve experts, BAFAW is a professional industrial valves manufacturer with a wealth of product experience. 24 hours online for you to solve the problem!