Global Valve Vs Gate Valves
Globe Valves :
The Globe valves are a member
of the linear motion valve family which are designed for many industrial
applications, including the oil and gas industry. These valves are similar to
the gate valves and a use linear motion for the throttle flow. Its functions
include start and stop of media as well as regulate the flow it within the
pipe. Owing to their design i.e. made with a spherical body and a disc they
provide a tighter seal with maximum leakage stopping.
The Global Valve Supplier often prefer these valves
as they are perfectly suitable for applications where the main concerns are
safety and leaks. A superior advantage of a globe valve is that it does not
leak as much as other valves. The vertical disc movement within the globe valve
is specifically designed to give these valves a good throttling ability thus
allowing them to regulate flow within a pipeline. These valves can also
function as control valves hence commonly used for highly viscous media,
corrosive media and systems of higher-pressure and higher-temperature.
Gate Valves :
The Gate valves are designed to
have the gate faces that are parallel/wedge shaped disc with a rising/a
non-rising stem in most of the cases. The basic operation is that the gate disc
moves upwards to open the valve thus providing little pressure drops since
there is no obstruction in the way of media flow. Also it closes by moving the
disc downwards to meet with the seats. Known to have lower pressure drops these
valves are offer little resistance to fluid flow, especially in the fully open
position. Above all the gate valves can be set in any directional flow which is
why they are strongly suggested by the Gate Valves Supplier to customer of varied
industries.
Their Structural Design
:
• Globe valve parts are located
inside the cavity itself. Since its main purpose is to throttle and provide
positive shut-off, this structural design allows that obstructions that aid the
valve in this purpose. The globe has a rising stem which permits the changes in
flow direction and the rate that contributes to a high-pressure drop
phenomenon.
• Gate valve construction is
much simpler since most of its internal components are present on the top part
of the valve body. They might have a rising or a non-rising stem. The body
becomes hollow when it is turned on thus there is a little pressure drop.
Their Functions :
• The globe valve is primarily
more of a control valve.
• The gate valve is designed for the media isolation not for the flow control.
Their Applications
• The globe valve is unidirectional and best used in applications where massive
changes in pressure are not an issue.
• The gate valve is a multidirectional valve specifically suitable for
applications where low-pressure drops are of utmost importance.
Their Working :
• The globe valve disc, on the
other hand, moves parallel to the media flow. During a full flow the disc only
has to move a little away from the seat.
• The gate valve working mechanism is that the is disc locked in between the
seats making its movement at a right angle in relation to the media flow
ensuring that it provides either fuller flow or zero flow.
Conclusion :
One of the prime advantages of
the valves is that they all look the same but their functioning is quite
different which is true in the case of globe valves and gate valves. We Fevisa,
one of the leading Valve Stockist in UAE ensure that these
facts are part of our valve designs. Our Valves
Made in USA have a superior functional capability and we
have international standards like WRAS approved Valves, UL FM approved Valves etc.
Thanks to the research and development of our team
of experts. We have the perfect solutions to get your ex-stock valves requirements
fulfilled.
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