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Everything You Need To Know About Manual Valves
Jan 29, 2021

What are Manual Valves?

Manual valves are fixed devices that are installed to begin/control/end the flow of liquids and are usually installed in industrial areas across the world. These valves require human intervention to be controlled thus the word manual. Normally, the operator of the valve is placed in the middle position to control the flow of liquid. There are many different types of valves and a wide range of applications to apply them to thus it is important to understand more about the different type of valves before making a business decision.

Different Types of Manual Valves

Ball Vales
A ball valve is controlled by a quarter turning the shut off valve and the flow of liquid is controlled by a rotary ball that has a hole through the middle and between two seats. A wrench handle is used to control the flow and a 90-degree turn would in turn open/close the valve. By looking at the direction of the wrench handle, one would easily be able to visually tell if the value is open or closed as the flow is open if the angle of the handle is parallel to the flow direction.

Gate Valves
Gate valves work by moving a barrier that is blocking the flow of liquid to allow the liquid to pass through. This works similar to how a dam would allow water out of the water catchment. Gate valves take a longer time to open and close as compared to other valves as the valve must turn more times to go from open to close position and vice versa. There are 3 types of gate valves: Plain wedge, split wedge, and flexible wedge.

Check Valves
The normal case use for check valves are they are installed in pipelines to prevent any backflow from happening. In this usage, if any backflow occurs, the valve will close and thus preventing any damage occurring to the entire pump system. These valves are also used to minimize water hammering.

Globe Valves
Many plants utilize globe valves as they have an advantage over gate valves and that is, they can be used to regulate pressure flow and start/stop the flow. They are called globe valves due to how they look on the outside. All globe valves have a stem within the valve to regulate the flow inside and the stem is connected to a disc. The advantages of globe valves are that they are good at controlling the flow as well as have complete stop flow abilities.

Butterfly Valves
Butterfly valves work in a 90-degree quarter turn circular motion to control the valve. They are used to start/stop/control the flow and the advantage of butterfly valves are that due to their simple and light construction, they are relatively easy and quick to open if compared to other valves. They have a lower pressure drop as compared to globe valves but might not be suitable for liquids at high temperatures due to the materials inside the butterfly valve.

Summary

Now that you understand more and about the different manual valves, Supermec provides a wide range of manual valves for your industrial needs.

You can view our range of manual valves here.

Supermec Private Limited, established since 1977, has been delivering more than 40 years of extensive international experience in the Asia Pacific & Middle East regions. We offer complete integrated Engineering, Procurement, Construction and Maintenance (EPCM) services to the Oil & Gas (Onshore & Offshore), Petrochemical, Petroleum & Pharmaceutical industries.

Contact us at a time of your convenience at sales@supermec.com or +65 68619522 to find out more about how we can assist you with any manual valves matters.


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