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Tilting Disc Check vs Swing Check Valve

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Tilting Disc Check vs Swing Check Valve

Tilting Disc Check vs Swing Check Valve

priya

(Chemical)

(OP)

10 Aug 07 05:12

Can anybody explain me the main disadvantage of tilting Disc Check valve over a swing Check valve?

RE: Tilting Disc Check vs Swing Check Valve

JimCasey

(Mechanical)

10 Aug 07 16:29

tilting disc check valves are a lot smaller and lighter so for a given pipe size they don't cost as much.  Since the tilting disc is partially balanced, the cracking pressure is less-Particularly for vertical upward flow.  Neither will work well for vertical downward flow, and neither will be happy if they are not installed right-side up.   

RE: Tilting Disc Check vs Swing Check Valve

stanier

(Mechanical)

12 Aug 07 19:01

What you aim for is a valve with a low mass and short travel so that is is closed before the returning pressure wave will slam it shut. The tilt check by its geometry is better than a swing check valve. the latter has been described as "agricultural at best".

Refer Fluid Transients in Pipeline Systems ARD Thorley. Also check out the Delft Laboratory site. Delft have tested check valves for dynamic performance. Als see

The characteristics of the tilt check valve are such that the potential for waterhammer are reduced. Not as much as you would see with an annulus type non slam check valve.What you aim for is a valve with a low mass and short travel so that is is closed before the returning pressure wave will slam it shut. The tilt check by its geometry is better than a swing check valve. the latter has been described as "agricultural at best".Refer Fluid Transients in Pipeline Systems ARD Thorley. Also check out the Delft Laboratory site. Delft have tested check valves for dynamic performance. Als see www.pipingdesign.com where there are papers on surge.

Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng
www.waterhammer.bigblog.com.au

RE: Tilting Disc Check vs Swing Check Valve

caihui

(Mechanical)

13 Aug 07 04:49

I think the tilting disc check valve's life is longer then the common swing check valve. As the damage from disc is smaller then the common swing check valve.

RE: Tilting Disc Check vs Swing Check Valve

JimCasey

(Mechanical)

13 Aug 07 08:57

Seconding what stanier said, as I recall the tilting disc is airfoiled so it goes to fully open position and stays there.  A swing disc valve continually bounces around and ultimately the pin wears which mat make it hang open, leak due to misalignemnt, or the pin may even fail.  If the disc goes downstream it inevitably finds something expensive to jam.  

RE: Tilting Disc Check vs Swing Check Valve

terje61

(Mechanical)

13 Aug 07 10:58

I support the replies from both JimCasey and Stanier and the descibtion that swing checks are "agricultural at best".

During the NEL valve workshop in Aberdeen (October ) there was an interesting paper about Maintenance, Inspection and Testing of Non-Return Valves. This paper was presented following a near accident on a British platform where 12 out of 12 swing check valves in a production line failed.

However, Priya, correct valve selection should always be based on the application. For standard non-return applications a tilting disc or dual plate check valve will do. For more critical applications (e.g. to protect expensive rotating equipment or potential risk of waterhammer) an axial or non-slam check valve type is recommended.

    

RE: Tilting Disc Check vs Swing Check Valve

grandnobi

(Mechanical)

17 Aug 07 14:02

What I hate most about tilting disc check valves is the restricted accessibility for maintentance.

The body of a swing check valve typically is equipped with a separate flanged cover plate. This allows you to access the flapper for maintenance or to remove the flapper for line testing and flushing while the valve remains in installed condition.

Tilting disc valves, however, typically have a split body. You have to remove the entire valve body for maintenance. It is even worse where tilting disc checks valves are equipped with butt welding ends. In this case the pipping manifold has to be spread apart for maintenance. Sometimes this requires the provision of additional break flanges.

RE: Tilting Disc Check vs Swing Check Valve

stanier

(Mechanical)

18 Aug 07 00:16

Of course if you used an annulus type non slam valve such as Noreva or Mokveld you wouldnt need to be continually taking your check valves apart for maintenance.

The prime cost of a piece of mechanical equipment may only be 12% of its whole of life cost if it is a high maintenence item. Great if you want job security in maintenance but if you are the owner and want reduced life cycle costs and plant availability avoid the swing check and the dual plate type valves.

There are two types of damage by surge. The first is obvious and something breaks. The second is the damage from repetitive events that cause fatigue failure of seals, glands, discs, seats, shafts and gaskets. When one piece of equipment finally succombs to this type of failure you are then reliant on the standby which is in a parlous state itself having been subjected to the same fatigue history.

Design the system for whole of life not the maintenance crew's career path and longevity!

Grandnobi,Of course if you used an annulus type non slam valve such as Noreva or Mokveld you wouldnt need to be continually taking your check valves apart for maintenance.The prime cost of a piece of mechanical equipment may only be 12% of its whole of life cost if it is a high maintenence item. Great if you want job security in maintenance but if you are the owner and want reduced life cycle costs and plant availability avoid the swing check and the dual plate type valves.There are two types of damage by surge. The first is obvious and something breaks. The second is the damage from repetitive events that cause fatigue failure of seals, glands, discs, seats, shafts and gaskets. When one piece of equipment finally succombs to this type of failure you are then reliant on the standby which is in a parlous state itself having been subjected to the same fatigue history.Design the system for whole of life not the maintenance crew's career path and longevity!

Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng
www.waterhammer.bigblog.com.au

RE: Tilting Disc Check vs Swing Check Valve

CWFCNuclear

(Nuclear)

15 Nov 07 17:49

If your velocity is not high enough to hold the disc fully open both the swing check and tilting disc valve will experinece bushing/hinge pin wear.  Once difference between tilting disc and swing check is that the TD is very intolerant to any wear and will result in seat leakage.  Swing checks with moderate hinge/bushing wear may still seat tightly at high DP.  

If your velocity is below 10-12 fps water, expect disc oscillation for a swing or TD valve.  These are ballpark numbers and differ based on the specific desings.

RE: Tilting Disc Check vs Swing Check Valve

stanier

(Mechanical)

15 Nov 07 18:59

Great insight of what industry already knows. Given the nuclear industry's routine documentation of failures is there a Report you can reference?

CWFCNuclear,Great insight of what industry already knows. Given the nuclear industry's routine documentation of failures is there a Report you can reference?

Explore more:
Inexpensive 3-Way TC Ball Valve that is Easily Cleaned

If you are looking for more details, kindly visit LEFLOW.

Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng
www.waterhammer.bigblog.com.au

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News

-01-31 By ren

Tilting Disc Check Valve, We live in a time when we&#;re constantly inundated with information. With so many different sources of news and information, it can be hard to determine what&#;s true and what&#;s not. One area where this is particularly troublesome is technology. You may hear about a new product or service and want to know if it&#;s worth your time or money.

But how do you know if the information you&#;re looking at is reliable? One way to check the validity of an article or video is by using a tool called a tilting disc check valve. Simply put, this is a machine that uses ultrasound to verify the accuracy of information. If you want to find out more about tilting disc check valves, read on for details about how they work and what you can use them for.

What is a Tilting Disc Check Valve?

A tilting disc check valve is a heavy-duty device used to prevent the backflow of water or wastewater through a pipe system. When the valve is in the open position, incoming water flow can pass freely into the vessel; when the valve is closed, incoming water flow is blocked by the tilting disc. This prevents sewage from flowing backward into the pipeline and into your home or office plumbing system. 

There are several types of tilting disc check valves available on the market today. The most common type uses a rotating disk that sits inside a cylindrical body. As water flows into the body, the disk rotates and blocks the path of sewage. Other types use pressure instead of rotation to block water flow; these valves are typically used in pipelines that transport hazardous materials. 

The key features to look for when purchasing a tilting disc check valve include:

&#; Durable construction: The valves should be sturdy enough to handle high levels of water pressure and continuous use.

&#; Size and configuration: The valve should be small enough to fit inside an existing pipe system but large enough to accommodate a rotating disk. 

&#; Capacity: The valve should have sufficient capacity to accommodate large volumes of wastewater without backflow.

How Does a Tilting Disc Check Valve Work?

A tilting disc check valve, also known as a changeover valve or detachable ballcock, is a valve used in water and gas networks to prevent the backflow of water or gas. When the pressure differential between the two liquids becomes too great, the tilting disc opens allowing the liquid to flow through while preventing any air from entering. 

The tilting disc check valve was first patented in by Edward Hinchcliffe. The basic construction of a tilting disc check valve is a metal disk that sits on an inclined plane and has two openings that coincide with each other when the disk is in its neutral position.

The disk is mounted on a movable shaft and can be rotated so that one opening points downwards while the other points upwards. When pressure builds up in one liquid inside the tank, it causes the metal disk to rotate until it reaches its upper position where the two openings no longer coincide.

This allows air to enter and causes the disk to rotate back down to its lower position, preventing liquid from flowing back through the open pipe.

Uses for a Tilting Disc Check Valve

A tilting disc check valve is a valuable tool for water distribution systems. It&#;s used to prevent the backflow of water and protect equipment and downstream users from potential flooding. In this article, we&#;ll explain what a tilting disc check valve is, how it works, and some of the uses you might find for one in your installation.

When Should I Replace My Tilting Disc Check Valve?

If you have a tilting disc check valve, it is important to replace the valve every 10 years or when it starts making noise. Replacing the valve will help keep your boiler running smoothly and protect against potential water leaks. The process for replacing a tilting disc check valve is relatively simple and can be done by yourself. Here are some tips on how to do it:

1. Remove the old valve by unscrewing the retaining screws. Be sure to wear gloves and avoid getting water on the hot parts of the boiler.

2. Clean all of the debris off of the new valve before installation by using a hose or pipe cleaner. Make sure that the edges of the new valve are clean and free from any nicks or scratches.

3. Install the new valve by screwing it into place with the retaining screws. Again, be sure to wear gloves and avoid getting water on the hot parts of the boiler.

What Are the Benefits of Having a Tilting Disc Check Valve in My Home?

A tilting disc check valve is a great way to prevent water from flooding your home in the event of a pipe break. By installing this type of valve, you can avoid extensive damage to your property and belongings. Additionally, these valves can help safeguard against potential health risks associated with floodwaters. Here are some of the benefits of having a tilting disc check valve in your home:

Prevent Flooding: A tilting disc check valve can help prevent water from flooding your home in the event of a pipe break. This prevents extensive damage to property and belongings, as well as potential health risks associated with floodwaters.

Prevent Damage: A tilting disc check valve also helps protect against potential damage to pipes and other components in your home. By preventing water from entering the system, this device safeguards against costly repairs later on.

High-Quality Protection: Tilting disc check valves are made out of high-quality materials that provide long-term protection for your property. These valves are also easy to install, so you can get started quickly.

How to Install a Tilting Disc Check Valve

If you have a tilting disc check valve, there are a few simple steps you need to take to install it. First, find the location on your water line where the valve will be installed. Next, mark the location on the pipe using a marker. Then use a pipe cutter to cut the pipe at the marked location. Finally, use a wrench to tighten the check valve onto the pipe.

Where can I buy a tilting disc check valve?

If you are in the market for a tilting disc check valve, there are a few places to look. Many hardware stores carry them, but you can also find them online or through specialty retailers. Here is a list of some of the more popular places to buy a tilting disc check valve:

Hardware stores:

-Home Depot

-Lowes

-Walmart

Online retailers:

-Amazon

&#; eBay

&#; Zappos

Conclusion

If you are experiencing problems with your tilting disc check valve, it is important to understand the basics of what is going on and how to fix it. By following these simple steps, you will be able to get your machine back up and running as quickly as possible.

Want more information on tilting check valve? Feel free to contact us.