What Is The Difference Between Gate Valve And Globe Valve?

Gate valves and globe valves are two varieties of valves frequently employed in industrial settings. Functionally, these two valve types appear similar as both serve to open or close the medium’s passage. Nevertheless, their structures differ. Subsequently, I will elaborate on the distinctions between these two kinds of valves.

Different in Structure

The difference between a gate valve and a globe valve lies in their structures, which is one of the key distinctions. The gate valve has a relatively simple structure. A significant portion of its internal components is situated on the top of the valve body. It may possess a rising or non-rising stem. When opened, the valve body becomes hollow. This body configuration leads to a low-pressure drop.

In contrast, globe valves have a more intricate structure as their internal parts are housed within the cavity. They feature a rising stem. The primary function of a globe valve is to ensure a reliable shut-off and enable throttling. Globe valves can also modify the flow direction and flow rate, resulting in relatively high-pressure drops.

Different in Function

Another disparity between a gate valve and a globe valve exists in their functions. As previously stated, globe valves possess the ability to alter the flow direction and flow rate. In contrast, the gate valve cannot regulate the flow. Gate valves are specifically engineered for the isolation of media. The design of the gate valve is such that it cannot withstand the pressure of the media when in a semi-open state. Globe valves are more proficient in this regard and are more commonly recognized as control valves.

Different Working Mechanisms

The additional difference between the gate valve and the globe valve pertains to their working mechanisms. Gate valves are designed to offer either full flow or complete shut-off. The disc within the gate valve seats itself between the seats. The movement of the disc occurs at a right angle concerning the flow of the medium. When the valve is in the open position, the cavity is nearly vacant and the flow space is equivalent to that of the cavity. A small additional space is reserved for the stem and the seats.

Conversely, the movement of the globe valve disc is parallel to the flow of the media. The disc only shifts slightly from the seat, thereby enabling a full flow. The globe valve has been engineered in a manner that ensures a tight shut-off and allows for throttling.

Here is a distinct explanation regarding the differences:

Globe valves are typically employed for flow regulation purposes, whereas gate valves are commonly utilized for on-off control.

In the open position, gate valves exhibit a low-pressure drop across them and offer minimal resistance to the flow of the medium. In contrast, globe valves impose significant resistance on the fluid flow and have relatively high-pressure drops.

Gate valves possess a simple design, while globe valves feature a more complex one.

Gate valves are unidirectional, but globe valves are multi-directional.

Gate valves result in little fluid being trapped in the line, yet globe valves trap a larger quantity of fluid due to their flow direction.

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