Gate Valve vs Globe Valve vs Check Valve

Valves play a critical role in the oil and gas industry, especially in downstream operations where precise control of fluid flow is essential for safety and efficiency. Among the various valve types, gate valves, globe valves, and check valves are some of the most common. Each serves a unique purpose with a design to address specific operational needs. In this article, we compare the design, function, and applications of gate valves vs globe valves and check valves.

What is a Gate Valve?

Gate valves are linear motion devices designed to block or allow fluid flow within a pipeline completely. The defining characteristic of this valve is its “gate-like” disc that rises or lowers to allow or block flow, respectively. Gate valves are popular for providing a straight-through passageway and minimizing pressure drops. This is because they provide negligible resistance when fully opened, allowing for a maximum flow rate and minimal turbulence. They excel in on/off control applications, such as in water supply and wastewater treatment facilities, but not in flow regulation.

 

What is a Globe Valve?

Unlike gate valves, globe valves have a design that enables them to excel at flow regulation and throttling applications. Their squirrel-shaped body causes significant changes in the direction of fluid flow, which creates resistance and allows for better throttling control. Moreover, the valve body houses a movable disc or plug that obstructs or allows fluid flow through the valve. This design ensures a tight seal, making them common in industries like oil & gas, power generation, and chemical processing. Similar to gate valves, the actuation of globe valves can be done manually or by various automatic systems. Also, their excellent sealing capabilities make them suitable for high-pressure and high-temperature environments.

 

What is a Check Valve?

Check valves are non-return valves that allow fluid flow in only one direction. The basic principle of operation involves a movable element—typically a disc, ball, or diaphragm—that blocks reverse flow. It achieves this automatically, preventing backflow, which can lead to system contamination or damage. Check valves are standard in various applications, including water and wastewater management, fire protection systems, and food and beverage industries. In these industries, they protect equipment like pumps and compressors from backflow and potential damage.

 

Features of Gate Valve vs Globe Valve vs Check Valve

When considering the suitability of a gate valve vs. globe valve vs. check valve in an application, it is essential to compare their features across several aspects. The following sections highlight a few of these aspects.

Design and Construction

Gate Valve	Globe Valve	Check Valve
It features a rising or non-rising stem with a wedge or slab-like gate, usually requiring more installation space. It also provides a straight-through passage with an insignificant pressure drop.	The valve disc also translates perpendicular to stop or allow flow. The valve structure creates flow resistance. Thus, there is a significant pressure drop across the valve.	Generally, it exhibits a low-pressure drop when open. However, lift check valves may incur higher losses than swing check designs.

Flow Control of Gate Valve vs Globe Valve vs Check Valve

Gate Valve	Globe Valve	Check Valve
Not ideal for flow metering because the relationship between valve disc position and flow is not linear. Also, there is vibration and turbulence when partially open. They are typically bi-directional valves.	The valve design allows for precise flow metering and isolation in high-pressure, high-temperature applications. Allows for only unidirectional flow.	They serve a different purpose entirely, as they do not allow for control of flow rates. Allows for unidirectional flow like globe valves.

Operating Characteristics of Gate Valve vs Globe Valve vs Check Valve

Gate Valve	Globe Valve	Check Valve
Valve disc travels a significant distance to close and open, so it is ideal for infrequent use.	It requires a few turns to adjust flow settings, which makes it a good option for applications needing fast-acting valves.	Automatic and fast-acting valve, as it responds to changes in fluid pressure.

Maintenance Requirements of Gate Valve vs Globe Valve vs Check Valve

Gate Valve	Globe Valve	Check Valve
Easy to maintain due to the simple design. However, sealing surfaces may wear down quickly if not used as intended (not fully open or closed).	It requires more maintenance because the operation is frequent, leading to faster wear than a gate valve.	They require minimal maintenance, as they are designed for automatic operation. However, regular inspection for wear and tear remains essential, especially in dynamic systems prone to pressure fluctuations.

Cost Considerations

Gate Valve	Globe Valve	Check Valve
Typically, they represent a lower expenditure due to their straightforward design and ease of manufacturing.	It can be more expensive to produce and install, especially as it requires high-quality materials for optimal performance under varying pressure and temperature conditions.	They can vary in cost based on their design and materials. More advanced designs like dual plate check valves may command higher prices, but their efficiency and reliability often justify the trade-off.

Applications of Gate Valve vs Globe Valve vs Check Valve

Gate Valve	Globe Valve	Check Valve
Usually serve in applications needing tight shut-offs, such as waterworks, oil and gas pipelines, and heavy industrial processes.	Suit flow regulating tasks are prevalent in chemical processing, water treatment, and steam regulation. Also, provide a tight shut-off.	Provide backflow prevention in pumping stations, HVAC systems, and residential and commercial plumbing.

Choosing the Right Valve at QRC

At QRC, we offer a wide range of gate, globe, and check valves. Our team of professionals is available to help you decide on the correct valve type and the most cost-effective solution for you. Contact us today to find out more.