A check valve is a widely used valve in different sectors and installments ranging from domestic usage to industrial usage. In this article, we are putting a light on detailed information about the usage, advantages, and mechanism of different types of industrialcheck valves. First of all, let's have an introduction to check valves.
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What Is A Check Valve?
A check valve is an automatic shut-off valve, designed to allow the flow of fluids and gases in a single direction.
The check valves operate under pressure and flow; the closure mechanism opens allowing the gases or fluids to flow freely.
Fluids or gas enter the valve at the inlet and exit through the outlet. Until the pressure drops, or the pump is shut down the flow continues without any interruption.
It is one of the few self-automated valves that don’t require assistance to open and close, unlike other valves. If the plant facility loses air, electricity, or labor assistance it won't affect the work continuity of the valve.
PVC check valves are widely used by various industries. Check valves are ideal for water pumps.
Mechanism Of Check Valve
The industrial check valve gets activated by the flowing material. The check valve will get opened automatically by the pressure of the material passing in the right direction and if the flow gets reversed, then the valve closes automatically.
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While getting opened the internal disc in the valve allows the flow to pass forward. The disc begins closing the valve as forward flow gets decreased or is reversed.
Parts Of Check Valve
- Cover
- Body
- Flange
- Hinge Pin
- Seat
- Disk
- Hinge Arm
Types Of Check Valve
- PVC Check Valve
- Dual Plate Check Valve
- Swing Check Valve
- Wafer Type Check Valve
- Ball Check Valve
- Lift Check Valve
- Stainless Steel Valve
- Feed Check Valve
- Reflux Valve
- Brass Check Valve
- Cast Iron Check Valve
- Stainless Steel Check Valve
- Cast Steel Check Valves
Application Of Check Valve
The application and usage of check valves range from domestic to industrial purposes. Check valves can be used in the following sectors and systems,
- Pumping Systems
- Pipeline Networks
- To Control Fluids
- To Control Gaseous Flow
- Pharmaceutical Factories
- Aircraft Hydraulic Systems
- Irrigation Systems
- Fuel Pump
- Water Supply Check Valves
- Heating Boilers
Advantages Of Using Check Valves
It doesn’t matter what type of check valve is getting installed. The answers to your question about why do we need a check valve to get installed are below,
- Low-Pressure Change
- Quick Opening
- Works Automatically
- Prevents Back Flow
- Do Not Require Power To Operate
- Maintains Pressure
- Low Maintenance Costs
- Serve As a Backup System
- Ideal For High And Low Pressure
- Reliable And Long Service Life
- Used For Both Horizontal And Vertical Flow
- Protect Pumps And Compressors From Damage Caused By Back Flow
- Reduce Downtime And Loss Of Production
- Prevent Water Hammer
- Reduce Sudden Valve Failure
Materials Used For Different Types Of Check Valve
Different types of check valves are required for different setups and usage. Following that, whether it is PVC Check Valve, Dual Plate Check Valve, Swing Check Valve, Wafer Type Check Valve, Ball Check Valve, or Lift Check Valve all these industrial check valves are available in different dimensions and materials. The price of check valves is quoted as per the materials used and the dimensions of a check valve.
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cranekiran
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Dear members,
My question is meant only for Butterfly valves only,Thanks in anticipation.
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TD2K
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What do you mean by drill standards with respect to butterfly valves?
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cranekiran
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Thanks for your response TD2K,
What I meant was:-
Now for eg:- AWWA Standard is a valve standard and ANSI is a flange standard i.e you can have a butterfly valve with MULTIPLE drill(for flange connection) standards at a same time i.e ANSI,JIS5K,JIS10K but the valve is based on AWWA.My confusion here is who decides the final arrangement,the end user or the manufacturer?
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TD2K
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I'm still not clear what you mean by multiple drill standards. Does that mean you want some valves with ANSI 150 flanges, others with ANSI 300, others with JIS5K?
I don't have a copy of AWWA valve standards so this is purely my opinion. But, if the vendor is set up to supply you with different flange sets (ANSI,JIS5K,JIS10K), I doubt there would be any problems.
I'd pose the question directly to them.
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Mechanical
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KR
You can always ask your vendor to provide thr flanged valves drillrd to the specific flange standard you are using.It is not a problem for the valve manufacturer when the valve design conditions and flange ratings are matching.
navnit
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awwa has a standard for the flanges - geenrally slip-on. i guess the gentlemen is referring to the bcd and the # of bolts on the flange. im assuming that the service is for water - mostly this is the application for awwa valve/flange specs. details of the diffrent dimension of the flanges (for diffeerwrn rating and facing)per API, ASME, MSS and AWWA can be found in Tube Turns catalog.
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