Seals You Use Everyday

Cliff • August 13, 2018

Seals are the great unseen player that keep the mechanisms we use every day working properly.

From making breakfast in the morning to driving your job to tending your garden in the evening, we all interact with seals from sun up to sun down.

The bottom line is, seals help to keep certain things in, and to keep other things out.

Here are the seals most of us use in our everyday lives and the role they play in our kitchens, gardens, automobiles and more.

Seals in Your Kitchen

Ready to pop a pie in the oven? Then you’re about to encounter a seal.

Your oven has a rubber seal around the door to keep the heat in, while allowing you to open and close the door.

Once the door is closed, the seal on the door allows you to keep your food piping hot with an air-tight container, aka a sealing lid.

Seals in Your Garden

There’s nothing like growing fresh veggies in your own backyard. And seals help you make sure your garden thrives all summer long.

Your water spray gun connects to your hose fitting with a rubber seal. This seal helps your hose maintain water pressure and prevent leaking, so you can control the water flow to your garden.

Seals in Your Car

You can thank seals for your car’s ability to keep you dry while driving through a rain storm.

The doors all have a molded rubber seal around them to keep the rain out, while still allowing you to get in and out whenever you need to.

Seals in an Airplane

Seals are a critical component in todays modern aircraft. They can be found in flight controls, landing gear, engine fuel systems and aircraft pressurization, just to name a few.

Seals in flight controls will allow a Boeing aircraft the ability to take off, control all aspects of flight, land and brake without human input.

Seals at a Restaurant

When you go out for lunch, seals play a big role in your dining experience — from the table where you’re seated to how your food is made and processed.

Seals are used in processing and storing food. They’re also used in the mixers that fold dough for the bread on your table.

And if you top off your meal with a local micro-brew, seals are used in making sure your beer is dispensed with a great head and chilled to just the right temperature.

Seals at the Hospital

Without seals, you wouldn’t be able to receive the critical treatment you need during a hospital visit.

Seals are used in medical equipment to ensure fluids are retained, and that contamination is kept out of operating systems.

Seals also help keep electrical components dry and preforming at their peak. A few examples of seals found in medical equipment include:

  • Disposable catheters
  • Prosthetic feet for proper adjustment of foot angle
  • Accumulator in prosthetic knee that provides a more natural gate
  • Saline pumps to help push fluids through the body
  • Respirator pumps to help force air through the lungs
  • Suction pumps for pulling fluids from the body during and post-surgery
  • Drills and saws for insuring retention of fluids and lubricants during an operation
  • Mixer seals used to produce pharmaceuticals

Eclipse has designed many different seals to fit the needs of medical equipment manufacturers. Learn more about how Eclipse seals have revolutionized the medical equipment industry >

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Eclipse deals regularly with challenging sealing applications from all industries. High pressures and speeds create unique sets of conditions where seal design and material properties are pushed to the limit. While reciprocating applications can certainly test seals to the edge of capability, often times rotary applications can present the greatest challenge to seal integrity and wear life. Unlike reciprocating configurations where the seal is acting on a different part of the shaft or bore throughout it’s operating range, rotary seals must operate on the same sealing area continuously. This makes things like heat rejection much more difficult, especially in unlubricated or dry running applications. Extreme localized heating can have negative affect on both seal and hardware life. Rotary applications also pose sealing difficulties due to the simple fact that surface speeds can be much higher than in reciprocating systems. A simple electric motor can operate at very high rpm, while long stroke, high speed reciprocating machinery is a major piece of equipment that is far less common (though Eclipse also has sealing solutions in a number of these situations). A customer approached Eclipse with an application that was beyond the scope and capability of any standard, off-the-shelf rotary seal. This sealing system would require a combination of both wear resistance in high-speed rotary, as well as excellent leakage control and sealability. Two factors that, more often than not, work in opposition to each other. The Customer Issue The customer was developing a test system that required an electric motor shaft passed through the wall of a large vacuum chamber. The testing apparatus needed a sizable motor to meet the speed and torque requirements. Adapting the motor to operate inside the chamber would not be practical due to contamination and motor cooling concerns. Therefore, the motor would have to be placed outside the chamber and a driveshaft would have to go through the chamber wall. Which, of course, would need a seal. Operating Conditions:
 Rotary Shaft Seal
 Shaft Diameter: 2.5”
 RPM: 7,500 RPM - unlubricated
 Pressure: Vacuum internal side / 1 ATM external side Temperature: 40° - 90°F The customer knew any kind of off-the-shelf rotary seal with a rubber element would not last any amount of time in the combination of speed and a dry running condition. They also knew a single lip PTFE seal would likely not meet their leakage requirements. Therefore, they turned Eclipse for a custom sealing solution.