How To Reduce Seal Clearance For Stationary Parts?

How To Reduce Seal Clearance For Stationary Parts

This article focuses on shaft sealing and ways to reduce seal clearance for stationary parts. By using a sealing cone, the clearance between the sealing surface and the shaft can be reduced by approximately 75%. Additionally, this technique can increase the life of your seals by up to 300% if done correctly.

Seal Clearance Reduction

Stationary parts can present a clearance issue when being manufactured. By understanding how to reduce seal clearance and creating the correct tolerances, manufacturers can ensure clean and efficient parts production.

Understanding Seal Clearance:

Stationary parts sealing is a term used in manufacturing that refers to the distance between the surface of a part and the sealant or coating that prevents contamination from entering the part. The correct amount of clearance ensures that contaminants do not get trapped between the part and sealant, which would lead to defects in the finished product.

There are three primary factors that affect seal clearance: Part Shape, Part Location, and Sealant/Coating. Part shape affects how close the part is to other parts on the assembly line; part location describes where on the assembly line the part will be placed, and sealant/coating affects how much space there is between the part and sealant/coating.

The part shape is one of the most important factors affecting seal clearance because it dictates how close each part will be to other parts on the assembly line. If a part has a large surface area, it will require more space around it to allow for proper sealing. Conversely, if a part has a small surface area, less space will be required around it to ensure adequate sealing. 

Part location is also an important factor affecting seal clearance because it dictates where on an assembly line a particular part will be placed. Parts located closer to each other on an assembly line require less

Why do we need to reduce seal clearance?

Sealing the clearance between stationary parts and the floor can prevent dirt, dust, and other debris from entering your machine and causing problems. This is especially important for machines that use a lot of oil or gas, as it can cause engine failure or other safety hazards. There are a few simple steps you can take to reduce seal clearance on your machine: 

1. Clean your part surfaces thoroughly before sealing them. This will help to eliminate any build-up of debris that could block the seals.

2. Use a proper sealant. There are many different types of sealants available on the market, and each has its own advantages and disadvantages. Make sure you choose one that is designed specifically for use with stationary parts.

3. Follow the manufacturer’s instructions for using the sealant. Failure to do so may result in premature wear of the seals or even damage to the parts themselves.

Approaches to Reducing Seal Clearance

A seal clearance is the distance between the leading edge of a moving part and the sealing surface. A higher seal clearance allows for greater fluid flow and low-pressure losses. Stationary parts, such as pumps and valves, often have a high sealing requirement due to their relative motionlessness. There are many approaches that can be used to reduce seal clearance on stationary parts. 

In some cases, it may be necessary to make modifications to the part itself in order to achieve the desired seal clearance. For example, certain types of pumps may require a larger sealing area than other types of pumps in order to maintain proper performance. In this case, it may be necessary to enlarge or modify the pump component in order to achieve the desired clearance. 

In other cases, it may be necessary to alter the surrounding environment in order to reduce seal clearance. For example, if a pump is operating within an enclosed chamber, it may be necessary to reduce the air gap between the pump and its enclosure in order to improve sealing performance. 

There are also numerous methods that can be used in conjunction with engineering design in order to achieve desired seal clearances without requiring modification of the part itself. For example, using flow visualization techniques (such as CFD) can help identify areas where excessive flows are occurring which can lead to reduced seal clearances.

Different methods used for a stationary application

There are a variety of methods that can be used to reduce seal clearance for stationary parts. Some of the more common methods include using shrink-fit rings, use of interference fittings, and the use of snap-fit components. The choice of method will depend on the specific application and the type of seal that is being used. 

One common method for reducing seal clearance is to use shrink-fit rings. These rings are made from a material that shrinks when heated, which in turn reduces the amount of space between the parts. This type of ring is often used for sealing two parts that are not in contact with each other. 

Another method that can be used to reduce seal clearance is to use interference fittings. These fittings are designed to create a tight fit between two pieces without requiring any special tools or techniques. This type of fitting is often used when two pieces need to be sealed together but do not have direct contact with each other. 

Finally, snap-fit components can also be used to reduce seal clearance. These components are made from a material that snaps into place when it is heated. This allows for a more secure seal between two parts than would be possible with interference fittings or shrink-fit rings alone


Stationary parts can be a major headache for manufacturers. The problem is that they are difficult to manufacture and fit perfectly without causing seal clearance issues. In this article, we will discuss some of the techniques you can use to reduce seal clearance on stationary parts while still meeting manufacturing standards. Hopefully, by the end of this article, you will have learned how to reduce seal clearance on your own products and save yourself time and money in the long run.

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BSV Staff

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