Does Seal Design Affects Equipment Performance?

When it comes to efficiently operating industrial equipment, every part matters. Even the small components can make a significant difference. For example, seals play a vital role in preventing leaks, maintaining pressure, and protecting machinery from contaminants. Some may think that their effectiveness depends solely on the material they are made from. Although material selection is important, design is also a key consideration. This is especially true when choosing specialty seals for equipment that operates under specific conditions. So, does seal design affect equipment performance?

The answer is yes. The seal design determines how well it performs under different operating conditions. The right design is crucial for maintaining equipment reliability, minimizing downtime, and extending machinery service life. But how exactly does seal design influence equipment performance?

Does Seal Design Affect Performance?

Prevents Leaks and Maintains Pressure

One of the primary functions of a seal is to prevent fluids or gases from escaping between connected components. When a seal is well-designed, it creates a secure barrier that maintains the pressure that is needed for the equipment to operate correctly.

The wrong seal design may not provide enough contact with the sealing surfaces, which can result in fluid or gas leaks. In hydraulic and pneumatic systems, even minor leaks can affect operating pressure. This can reduce the equipment’s efficiency and performance.

The right design ensures the seal stays firmly in place and maintains contact with nearby surfaces, even with changes in pressure and moving equipment parts during operation.

Reduces Friction and Wear

Seals often operate in environments where components move against one another. The design can influence how much friction is generated during operation.

When there is too much friction, it can increase heat buildup, accelerate wear, and place additional stress on moving parts. This can cause premature seal failure and damage to surrounding components.

Seals that are well-designed take into account factors such as:

  • Contact pressure
  • Surface finish
  • Lubrication
  • Movement

These considerations help minimize unnecessary friction while maintaining an effective seal.

Handles Temperature and Pressure Changes

Industrial equipment frequently operates under varying temperatures and pressure conditions. These changes can cause sealing materials to expand, contract, or lose their ability to maintain proper contact with surrounding surfaces.

Seal design must account for these operating conditions. For example, a seal used in high-pressure equipment may require a design that helps prevent it from deforming or being forced into surrounding clearances.

Similarly, equipment exposed to temperature fluctuations requires a design that allows thermal expansion and contraction without compromising sealing ability.

Choosing a seal design best suited to the equipment’s operating environment helps reduce the risk of leaks and unexpected failures.

Protects Equipment from Contamination

The function of seals goes beyond containing fluids and gases. They also help prevent dust, dirt, moisture, and other contaminants from entering sensitive equipment.

Contamination can damage internal components, interfere with moving parts, and accelerate wear. Effective seals help protect critical components from external particles, especially in applications involving bearings, rotating shafts, and hydraulic systems.

Seal design should be chosen based on the type of contaminants present and the system’s operating environment. Sometimes, applications require additional sealing features to better protect against moisture, dust, or other environmental conditions.

Extends Equipment Service Life

Poorly designed seals or incorrectly chosen seals can contribute to:

  • Frequent maintenance
  • Unexpected equipment shutdowns
  • Costly repairs

Leaks or contamination can result from failed seals, and this may affect other machinery components.

To reduce these risks, seals should have a suitable design that addresses the specific requirements of an application.

It is important to consider the following while selecting seals:

  • Operating speed
  • Pressure
  • Temperature
  • Chemical exposure
  • Movement

The right sealing solution that matches these requirements can help improve equipment reliability and reduce the frequency of component replacement.

Material is not the only thing to be considered when choosing a sealing solution. Seal design matters as much. A seal that works well in one application will not necessarily work well in another. In some cases, specialty seals may be needed to meet specific equipment requirements. The complete operating environment should be considered when choosing a sealing solution. If you are looking for a sealing solution, contact us today so we can help you identify designs that meet your equipment’s requirements. 

Benefits of Silicone Gaskets

Why You Should Choose a Silicone Gasket

Gaskets are an integral part of any application, especially in automotive engines where they play a crucial role in keeping the engine temperatures in check. This is why choosing a gasket material deserves special attention. Choose the wrong one, and you could see a significant drop in production.
Depending on what your application requires, silicone could be just the material you need.

Silicone Versatility

If you are considering silicone for your application, you will have a wide variety of choices in properties that will make it a perfect fit:

  • Silicone sheets and rolls come in a variety of thicknesses, from 0.10” thick to .500” thick.
  • Silicone can have a hardness anywhere from 10 Shore A to 80 Shore A.
  • Molding compounds can be pigmented to match the color chips or Pantone color designations.
  • Closed cell silicone sponge and foam come in sheets and rolls, from .032” thick to .500” thick. Its densities range from ultra soft to extra firm.
  • Silicone rubber has the broadest range of firmness and densities.
  • Fluorosilicone is resistant to fuel, oil, and chemicals.

Compression Set Resistance

Compression set, which occurs when a rubber cannot return to its original thickness after experiencing prolonged compressive stress, is an important factor to consider when choosing a gasket material. If compression set is one of your main concerns, silicone will be one of your best choices: two of the top-ranked compression-resistant materials are silicone and silicone sponge.

Flame Retardant

If silicone is compounded, its ability to resist flames is impressive. It can achieve UL94V0, UL94V1, and UL94HF1 flammability standards. For this reason, silicone is relied on for analytical instrumentation, telecommunications equipment, and controls found in Mass Transit systems. Even if silicone burns (which is only possible under extreme temperatures), its byproducts are non-toxic, and its residual ash can even provide electrical insulation.

FDA Regulations

Silicone can be compounded with FDA-approved ingredients to gain properties like high tear strength and flexing by using platinum-based catalysts. This makes silicone great for healthcare, instrumentation, food processing, and medical diagnostic equipment.

Electrical Conductivity

By blending silicone with nickel-graphite or silver-plated aluminum particles, silicone can be used as an electrically conductive gasket providing EMI shielding for use in electronic communication equipment. This form of silicone comes in a sheet or a custom-molded gasket.

Electrostatic Discharge (ESD)

In applications where ESD is a problem, silicone can be blended with a semi-conductive carbon to gain ESD properties.

Extreme Temperature Resistance

Unlike other organic elastomers like EPDM and neoprene, silicone rubber can retain its thickness even after exposure to a wide range of temperatures. This range goes as low as -60°C to as high as +250°C. In fact:

 

  • It can be used at 150°C continuously without experiencing any change in its properties.
  • Certain compounds can even withstand up to 200°C for 10,000 hours or more.
  • Certain forms of silicone can withstand 350°C for short periods.
  • Most forms of organic rubber become embrittled at -20° to -30°C.
  • Some kinds of silicone products can retain elasticity at -100°C and lower.

Silicone Sponge and Silicone Foam

Silicone sponge (also called closed cell silicone sponge) is made from a thin sheet of uncured silicone gum. Closed cell means that the cells are not interconnecting, preventing water from wicking through the sponge. It also has strong mechanical properties.
Silicone foam is an open cell, lightweight material. Higher density open cell variants are suitable for water sealing, while lower densities will allow moisture to pass through.

Other Properties

 

  • Due to its closed cell structure, silicone is great at water sealing with relatively low compressive forces. UL 50 and UL 50E are available.
  • Silicone is excellent at resisting UV and ozone because it has an inorganic backbone. This extends the performance of the gasket in the long-term.
  • Silicone sponge is much tougher than silicone foam.
  • All of silicone’s properties make it a great choice for outdoor environments with extreme conditions, such as the Arctic tundra and the desert.

No matter what gasket material you choose, make sure that you understand the major causes of gasket failure, and how to prevent them.

Consult the Industry Leader

If you are ready to make a purchase for your seal, consult the industry experts at Real Seal today. Real Seal has been an industry leader since the 1970s, and continues to innovate with its own chemist and technical staff. No matter what type of seal or mechanical component you are looking for, Real Seal will have the answer you need.