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Tips for best o ring maintenance

If o rings are not maintained, leaks can occur, and water and other fluids can enter the appliance or application, and even product in the mix!  If this happens, damage can occur to internal parts and mechanisms, causing deployment failings, potential false readings,...

What you need to know about O Ring Lubricants

Silicone grease and lubricants aren’t just a nice to have for o rings, but they can quite often be a must-have.  However, with so many greases and lubricants to choose from, it can often be a minefield choosing the best ones and the right ones for your o ring and...

O Ring Replacement

Replacing an O Ring in pressure washer wands is probably one of the most common replacements you'll find when working with seals.  Unfortunately, O Rings don't last forever, and over time they do deteriorate, and you will require an O Ring replacement.  It's important...

Reasons behind seal failure and a look into seal replacement

Unfortunately, there are occasions where O-rings, in particular, fail.  The failure of these seals is not simply due to one factor, but various factors that can occur across a range of applications – hence why locating the exact cause of such problems is just that, a...

Gaskets and seals for Aerospace

Gaskets and seals used for aerospace applications and equipment must be of premium quality and to a substantially high standard.  They are used across a range of applications such as radars, antennas, lighting, access panels, electrical conductivity, pressure sealing,...

Finding the best sealing materials for Food Grade Applications

You will find rubber seals across various industries, providing an important element and operating as a vital fixing across a wide range of different applications and equipment.  However, these FDA gaskets must follow strict, set guidelines, in terms of their material...

The Evolution of Gasket Solutions

When we talk about gaskets and the history of a gasket, we must start at the very beginning.  What is a gasket?  Ultimately, a gasket is a manufactured seal that is used to fill the gap/space between two or more surfaces.  Gaskets are typically manufactured by cutting...

How to preserve your gasket

Gaskets and seals don’t last forever. However, they are designed, or they should be, last for a considerable period.  In this sense, it is vital to look at ways to preserve your gaskets in order to avoid any application downtime.  Downtime that involves additional...

Important Design Features of Rubber Sealings

When it comes to designing the perfect rubber sealing, there are a few design features to bear in mind to help achieve the optimum solution.  In this post, we explore these rubber sealing features further and provide information on the benefits and best uses for these...

Optimal Squeeze for an O Ring to be effective

A doughnut-shaped seal that is primarily used to stop liquids and air from escaping or getting into specific spaces is the function and role of an O Ring.  Also known as a mechanical gasket, O rings are designed to fit between a groove and a compression during the...

Difference Between Ring Type Joint and Raised Face

Difference Between Ring Type Joint and Raised FaceIntroduction 

If you are new to the industry, you might not know the difference between Ring Type Joint and Raised Face. The difference is actually pretty simple and refers to the type of flange that you need to use when making your join.   

In this post, we will compare RTJ and RF so that you understand the differences more completely. Both types of joins are useful, but each has their own advantages and disadvantages. This post should give you more clarity and help you to identify what projects the different flanges are best suited for.   

 

Differences: Ring Type Joint vs Raised Face

Raised Face 

This is the type most commonly found in processing plants. When you see it, you will be able to recognise it straight away. In this model, the surfaces to attach the gasket to are raised. The bolting circle will always be lower than the gasket surfaces.  

The advantages are : 

  • You can use a wider range of gaskets – from spiral wound types to flat ring sheet types.  
  • As the surface is raised, it is more easily accessible. Replacing a worn gasket is thus a lot easier.  
  • This design enables more pressure to be concentrated onto a smaller gasket area. This, in turn, helps the joint handle pressure containment better.   
  • It is also useful when you need better separation between the two flanges being joined.  

  

Ring-Type Joint  

These are more commonly used in applications where either high pressure or high temperature is an issue. These are Class 600 or more flanges or where temperatures typically exceed 427° Centigrade.  

These flanges can be identified because they have grooves that are cut into their service. A metallic gasket is fitted into these grooves and then compressed to create a solid seal. The gasket is somewhat mangled in the process but fits into space perfectly.  

The advantages are:  

  • Metal to metal seals is made possible. These are a lot stronger and will withstand high heat, pressure and corrosion caused by chemicals.  
  • The grooves allow for a tighter fit and can be useful in situations where space is an issue.   
  • Depending on the type of gasket used, the faces may be in direct contact with one another.  
  • The gasket is not going to compress any more once it has been tightened. This makes it more resistant to movement and vibration.  
  • You have a reduced range of options when it comes to the type of gaskets that you can use. However, if you choose the right type for the job, the seal is highly reliable and strong. 

Conclusion 

As you can see, there are advantages to both types of flanges. You need to use the best design option for your project. It just pays to remember that you should always use the right connections for the best join possible.  

Using an RF connection on an RTJ is a recipe for disaster. It may hold initially, but something is bound to go wrong further down the line with this kind of tinkering.   

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