Being a mechanical engineer, you have to be aware of the control system. So, in this contrast we are here with the “Types of valves” topic. Here you will get each and every detailed information about the different types of valves used in industries.
So, don’t waste your valuable time. Stay tuned till end and its our guarantee that the valves will be in your blood from today!
What is a valve?
Table of Contents
Valve is a very important tool/device used in industry and is used to control, regulate and direct the flow of liquids and gases in pipes by opening, closing or partially opening the passage for the pipeline. They may be operated by a hand wheel or a motor (i.e., an active actuator).
Types of valves
There are so many valves used in different different industries for different different purposes. Here, we will look some of the most important and widely popular valves used now a days.
- Gate valve:
A gate valve is a standard type valve used in any process plant. Here the flow of fluid is controlled by the flow of the line. Gate valves are in an open or fully closed area.
The gate valve is used in almost all liquid fuels such as air, gas, water supply, lube oil, smoke, hydrocarbon, and in close proximity to all systems.
It should provide a good closure. It will not be used as a control or control valve because when we first open the gate valves, the passage opens slowly and Similarly closes slowly.
In order to create vibration and loud noise during launch and detection of disc damage causing disc damage increases the risk of leakage.
That is why It will be in a fully open space or in a fully closed area.
In gate valves, there are different types and those are:
• Solid Wedge Gate
• Flexible Wedge Gate
• Split wedge or Parallel disks Gate
• OS & Y Gate or (Rising Stem) of gate valves
Advantages of gate valves
• Gate valves contain very low impact losses
• They can be used in both circuits
• They provide laminar flow, the pressure loss is minimal
• Gate valves help save energy and reduce total ownership costs
• There will be a decrease in low pressure when fully opened and tightly closed.
Disadvantages of gate valves
• Gate valves cannot be opened and closed immediately
• They cause vibrations
• In systems where the temperature rises abnormally, due to the overflow of the pipe at the end of the valve, leaks in the gate valves.
• Operation, maintenance, and repair of valve valves in residential areas is complex.
Applications of gate valves
• Gate valves should be used in high temperatures and pressures.
• Used for open applications.
- Globe Valve:
The globe valve is used to start-stop and control the liquid in it. Globe capping occurs in an area in the system where we have to control the flow of fluid, and consider leakage and congestion of the system.
Generally, it is more expensive than gate valves. But it offers better leaks and durability than gate valves. Usually global valves are used as a control valve.
It is also used for cooling water systems, and is used to transport petrol, as well as lube oil. Its shape is globular on the underside which is why we call it a globe.
There are three types of Globe valve:
• Z types
• Y species
• Types of angles
Advantages of globe valves
• Globe valves are flexible, full shut-off feature is great.
• Closing time is short.
• The process of sealing the body ring is simple.
• Can be used as stop check valves.
• They contain positive closures
Disadvantages of globe valves
• Decreased pressure is high
• Closing under high pressure, globe valves require high power or actuator with high torque.
Applications of globe valves
Global valves are used primarily for blow purposes. They can be considered as standard purpose flow control valves used in high-performance applications.
- Check valve:
Check valves are used to prevent reversal in the piping system. check valves allow flow to pass only in one direction.
Whenever a back pressure is created in the system, then the check spigot closes and blocks the flow of fluid.
This is also a non-return valve. Check valves are therefore able to check and restrict flow in reversal.
There are three types of Check valves:
• Swipe check
• Piston check
• Raise a check
Advantages of check valves
• Test valves prevent back flow
• They can withstand pressure
• Test valves act as a support system
Disadvantages of check valves
• Can not be used with pulsating systems
• The closure element may crash and cause damage and aging
Applications of check valves
• Test valves are used in various markets and systems as they contain simple design and flexible asset options.
• They help prevent relapses and maintain pressure.
• Test valves can be detected in industries such as refining, petrochemical chemicals, chemicals, etc., local oil production, water, steam, gasoline refining, and viscous liquids.
• Also found in wastewater management and production systems.
- Plug valve:
The plug valve is a quarterly rotary valve. In this case, the disc rotates in a circular motion and uses valves to open or close.
It is called a plug valve because its disc is in the form of a plug and also contains a passage.
It contains an almost empty leak. The plug valve has been used in vacuum services, and as it can be used in high-pressure and high-temperature applications.
There are four types of Plug valves.
• Anointed Plug
• Unp greased Plug
• Eccentric Plug, once
• Extends the plug.
- Ball valve:
The ball valve is a Rotary Turn Quarter Valve. It is in a state of ball. This is a very quick acting type which means we can close it by 0 or 90 degrees.
The ball spigot is lighter and smaller in size and rating as compared to the gate valve.
We control it the way we like with the Plunger handle clockwise or anticlockwise to open or close the valve.
Different types of Ball valves:
• Brass ball
• PVC ball
• Stainless steel ball Valve.
Advantages of ball valves
• They contain an integrated and non-abrasive design that does not require lubrication
• Save on all valves
• The great advantage of ball valves is that they have features of immovable movement that can cause the ball valve seat to slip easily.
• They provide a rewarding service.
• Immediately open and close.
• Ball valves have a multi-way design flexibility.
Disadvantages of ball valves
• Ball valves are not ready to be pushed permanently.
• In residual fluid, particles in the liquid collide with the surface and attach to it. This can cause leaks, abrasions, and other problems.
Applications of ball valves
• Ball valves used to control the flow and pressure and to seal decaying liquid, slurries, common liquids and gases.
• They are used in the oil and natural gas industry, but also find a place in many fields of production, chemical storage, and residential use.
- Butterfly valve:
The butterfly valve is also a quarter turn rotating valve. It also helps control the flow i.e. start-stop.
Its main advantage is that its body is very small so it provides little space in the piping system, for this reason the butterfly valve is used in many places.
It is very compact and light and takes up very little space compared to other valves.
So it is very easy and quick to open it. In this case, the disk moves like a butterfly in a closed space.
Types of butterfly valve:
• Concentric Butterfly
• Eccentric Butterfly
• Wafer Type Butterfly
• Lug Type Butterfly and
• Double Flange Butterfly
Advantages of butterfly valves
• Butterfly valves are very accurate, making them profitable for industrial operation.
• They are very reliable and need very little adjustment.
• They have the ability to draw water.
• Can be installed or removed without removing the plumbing system
Disadvantages of butterfly valves
• Butterfly valves do not have strong shut-off capabilities
• The other part of the disk is always presented in flow, even when fully open. This may result in a change in pressure inside the valve, regardless of the setting.
Applications of butterfly valves
• Butterfly valves can be used in pharmacies, chemicals, and food processing equipment.
• Used for decomposing liquids when temperatures are low and pressure is high.
- Needle valve:
The design of the needle valve is similar to the globe valve. Its main difference is that its disk looks like Needle-pointed.
This is usually used in a tool where the need for precise fluid flow is required.
This is used for a small diameter pipe.
It is widely used in systems where very low pressure can be controlled.
Applications of needle valves
It is used in every industry with a wide range of applications such as: for control or metering of steam, oil, gas, water, air, or other non-viscous liquids is required.
- Pinch valve:
The pinch valve has a simple mechanism and has 1 pinch tube. This pinch tube is made of rubber and in this case, we can open and close the Valve using the pinch mechanism.
Its main advantage is that we can use it in solid particles with a lot of mud/slurry in it.
Types of pinch valve:
• OM Mechanical Pinch Sleeves.
• OV Mechanical Pinch.
• VM Air Operated Pinch.
• VF Air Operated Pinch.
• VT Air Operated Tanker Pinch.
• VMF Air Operated Pinch.
• VMP Air Operated Pinch.
- Pressure relief valve:
Pressure relief valves removes pressure whenever an incident of excessive pressure occurs in the pressure relief system or in the equipment, and the space created by it is eliminated by vacuum valves and protects the plumbing system.
Pressure relief therefore protects the piping system.
Types of pressure relief valves
• Spring-loaded pressure relief
• Balanced Bellows and Balanced Piston valves
• Safety relief
• Pilot operated pressure relief
• Power actuated pressure relief
Conclusion: Types of valve
So, that’s all from this article. Now its time to wrap up this. Hope you all like this information and it might have strengthened your Engineering knowledge.
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What is the function of a butterfly valve?
Which of the following valves is better for on/ off control?
Which of the following valves are used in high duty cycle applications?
Ceramic disc valve
Check valve is also called as
What is the purpose of piston valve?
Regulate fluids carrying suspended solids
Poppet valves are used in piston engines?
What is the other name for the plug valve?
What is the purpose of pinch valve?
Slurry flow regulation
In globe valves, the flow rate control is determined by
List of valve plug
the below mentioned valves which of these are used to control the flow of liquid in a single direction?