FAQs

Gasket Thickness - Is thicker better?

Whenever possible, we recommend the use of the thinnest gasket possible, taking into account the gasket thickness that the system was designed to. Thinner gaskets seal tighter, which lowers emissions and product loss, increase blowout resistance, and typically cost less. Flange irregularities on older equipment can be difficult to seal for thin material, therefore a thicker material is often required.

Gasket Reuse - How many times can I reuse a gasket?

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Gasket Used in Grooves or Recesses - What concerns do I need to consider for tongue and groove flanges?

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Flange Surface Finish - What surface finish should my flanges have?

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Gasket Stacking - Can I stack gaskets to fill a large gap between flanges?

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Expansion Joints - How many joints should my piping system have?

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Expansion Joints - Why did my expansion joint fail?

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Expansion Joint Liners - What is the purpose of the internal liner in my metal expansion joint?

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Expansion Joint Limit Rods – Why are limit rods installed on my expansion joint?

Limit rods absorb pressure thrusts in the system by limiting axial compression and expansion which in turn prevents over-compression or over-expansion.

Fabric Expansion Joint Deflectors – Why does my fabric expansion joint have an internal particulate deflector?

Some applications (mostly vertical ducting with vertical flow up) require an internal particulate deflector which is used to reduce airborne particulate from falling into the cavity of the expansion joint.

Universal Expansion Joints – Where should universal expansion joints be used?

Universal expansion joints allow for lateral motion and are typically used in “Z-bend” or “L-bend” piping arrangements.

Expansion Joints – When should I use a rubber or metal expansion joint?

Generally speaking, metal expansion joints are far more popular than rubber joints, perhaps by 4:1, due to their resistance to temperatures and pressures. However, many applications can handle a rubber expansion joint, which can save users significant money. Where the application parameters warrant, rubber expansion joints perform better on:

  • Lateral movements
  • Spring rates
  • Acoustical impedance
  • Abrasion / Erosion Resistance
  • Fatigue / Life Cycle
  • Installation and Maintenance
Mechanical Seals – Why did my mechanical seal fail?

Mechanical seals, when engineered for the system and installed correctly, will provide reliable operation for a very long time. Eventually they do wear out, but our experience indicates most seal failure is due to another issue in the system, such as:

  • Vibration
  • Contaminated lubricant
  • Improper installation techniques
  • Bearing wear
  • Misalignment
  • Incorrect seal selection
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