Tag Archives: temperature

How Temperature and Pressure Affect Seal Performance

Posted on by

Small components, such as seals, play a major role in keeping industrial systems running smoothly. Whether it is an HVAC unit, a hydraulic system, an automotive engine, or a manufacturing line, seals, including specialty seals designed for demanding applications, prevent leaks, maintain pressure, and protect equipment from contaminants. To prevent breakdowns, minimize downtimes, and extend the life of your machinery, it is important to understand how temperature and pressure affect seal performance.

How Temperature and Pressure Affect Seal Performance

Temperature

One of the biggest factors that influences how well a seal performs is temperature. Regardless of material, whether rubber, silicone, PTFE, nitrile, or fluorocarbon, there is a specific temperature range in which it works best. Working outside this window can cause rapid deterioration.

1. Heat Can Accelerate Material Degradation: High temperatures cause seal materials to weaken over time. Sustained exposure to heat can lead to:

  • Softening – can result in extrusion under pressure
  • Hardening – makes the seal brittle and prone to cracking
  • Loss of elasticity – results in poor sealing performance
  • Chemical breakdown – particularly in oils, fuels, and chemical processing applications

For instance, a nitrile seal is expected to perform excellently at moderate temperatures. But in a high-heat environment like that found in engine components, it can quickly degrade.

2. Cold Temperatures Can Cause Shrinkage and Embrittlement

Low temperatures can make many materials rigid. This can cause:

  • Seal shrinkage, which can lead to gaps
  • Reduced flexibility, reducing the seal’s ability to maintain contact
  • Cracking, especially when there are rapid temperature drops

3. Rapid Temperature Changes Leading to Thermal Shock

Frequent heating and cooling may cause seals to expand and contract repeatedly. This can cause stress on the material, reduce its lifespan, and increase the risk of leaks. Compressors, industrial ovens, and similar systems should therefore use seals that withstand thermal cycling without deformation.

Pressure

You want your seals to maintain a tight, leak-free barrier. Pressure is the determining factor in how well your seals perform. However, while there are specific temperature ranges, they are also designed for specific pressure ranges. Exceeding those limits can mean failure. 

  1. High pressure Can Lead to Extrusion: When seals are exposed to pressure that they are not designed to withstand, the material can be pushed or extruded, resulting in:
    • Material deformation
    • Rapid wear
    • Complete seal blowout
  2. Low Pressure Can Lead to Insufficient Seal Compression: Low pressure can prevent seals from fully compressing, leading to leaks. This is common in pneumatic systems, such as industrial automation, dental drills, air brakes on buses and trains, and tools like nail guns.
  3. Pressure Fluctuations Increase Wear: Pumps, valves, hydraulics, and other equipment that frequently switch between high and low pressure require seals with high resistance and durability.

Combined Effects of Temperature and Pressure Together

Real-world operations usually require simultaneous temperature and pressure. The problem with them working together is that their effects are amplified.

  • High temperature + high pressure: This leads to the acceleration of chemical and mechanical wear
  • Low temperature + high pressure: Low temperature makes seals less flexible and slightly shrinks. This is when the seal can easily crack or split in high temperatures because it cannot deform to relieve stress.
  • Wide temperature fluctuations + pressure changes: This creates complex stress patterns that lead to loss of elasticity, material fatigue, microcracks, and leakage. 

How to Improve Seal Performance in Varying Conditions

Here are some steps you can take to help ensure seals last as long as possible.

  • Choose the appropriate material for both temperature and pressure ranges.
  • Use backup rings for high-pressure applications.
  • Avoid exposing seals to sudden extreme temperature shifts if you can help it.
  • Follow the manufacturer’s instructions and recommendations.
  • Schedule a regular inspection to catch wear and hardening before they become bigger problems.

Ensure Your Machinery Performs at Its Best

Seals may be small, but they have a big role in ensuring that your systems work smoothly. Two of the most critical factors that affect their performance are temperature and pressure. By understanding how they influence material behavior, you can choose the right seal materials for the operating environment.

If you have a machine that operates under demanding temperature and pressure conditions, selecting the right sealing solution is crucial. Whether you are looking for durable elastomers, specialty seals, or an engineered thermoplastic mechanical component designed for extreme environments, we will help you find the perfect match for your application. 

Make sure your machine performs at its best, no matter the condition. Contact us today to get expert guidance.

Top Causes of Home Water Leaks

Posted on by

Water leaks are problematic for several reasons. Part of the problem is that you cannot see most of the pipework in your home so you do not always know that there is a leak or how to go about preventing water leaks. An undetected leak can mean water damage to your home and unwanted growth of mold.
If you want to protect your home from leaks, do regular inspections in areas where leaks are likely to develop. Keeping on top of the problem before it starts can save you a lot of hassle and keep your home free of water damage.
Following are some of the main problems to look for when you go through your home and that, if properly repaired, can be a useful measure in preventing water leaks.

1. Broken Seals

If you are noticing condensation on or near any of your appliances, you may have broken seals. When appliances are installed there are seals put around all the water connectors. Your dishwasher will also have seals on the door. When appliances start to get older the seals may break or wear out and they will need to be replaced.

2. Clogged Lines

Sometimes a clogged drain is only a minor inconvenience but if you end up with a serious clog, it can lead to overflowing or burst pipes. You can have some serious water damage if there are obstructions in handler drain pans or in your gutters. To avoid damage, it is important to keep your gutters and HVAC system clean.

3. Corrosion

Pipes can rust as they age and corrosion can eat away at them. If there is discoloration on your pipes or if they appear to be warping, you should call your plumber to assess the damage. You may need newer pipes if you have an old plumbing system that has started to corrode.

4. Damaged Pipe Joints

Over time, the joints where pipes connect can deteriorate and start to cause leaks. If you hear ticking and banging in the pipes, especially when you run hot water, your pipe joints may be under too much pressure. Again, you will want to have a plumber evaluate the situation before any major damage occurs. This is one of the most common areas where you can go about preventing water leaks.

5. Excess Water Pressure

It may feel nice to have a shower under high water pressure but extreme or uneven pressure can put a strain on your pipes. Most pipes and faucets are meant to withstand a certain amount of pressure and anything over that could cause leaking issues. A professional can measure your pressure for you if you feel it may be a concern.

6. Intruding Tree Roots

Believe it or not, some water leaks can start outside the home. If tree roots intrude on the water lines moisture can seep out into the yard. If you see wet patches or sink holes in your yard or notice a sudden drop in the water pressure you may want to have a plumber check for intrusion, especially if there are trees growing near your home.

7. Loose Water Connectors

If you have a hose or a pipe that supplies your appliances with water come loose, it can cause a leak. Water connectors can become loose due to shifting. It is possible that a washing machine hose could spring a leak due to shaking from the spin cycle. If you notice water running directly from a supply line or there are puddles around the appliance, check for a connector leak.

8. Rapid Temperature Changes

Pipes will expand and contract when there are extreme temperatures. This could cause the pipes to crack, especially if they freeze.
If you have noticed that you have a higher water bill than usual, a change in water flow, a musty smell, or other signs of a leak, Real Seal professionals can help you diagnose and solve the problem. If you notice your plumbing is not performing the way it should and are interested in preventing water leaks, it is important to have it taken care of quickly so that you avoid any excess water damage to your home.