Most Viewed FAQ's

• Does silicone caulk go bad?

  Silicone Sealants typicall have one-year shelf life guarantee. You can always test the caulk before starting a project by running a small bead of caul Read more...

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• What is a good Steam Gasket material?
  Related: Compressed Gasket Sheet

    Phelps recommends three kinds of gasket materials for high temperature steam applications ranging upto 300F Phelps Green Sheets: Thoro Read more...

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• What is the difference between EP, EPR, and EPDM?
  Related: Elastomers

  EPR is an abbreviation for Ethylene-propylene copolymer, while EPDM is an abbreviation for Ethylene-Propylene Terpolymer. From a functional standp Read more...

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• What thickness is best for a gasket?

  In general, Phelps recommends the use of thinner gaskets wherever possible. This increases the performance of the joint by lowering emissions, lowerin Read more...

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• Why is my O-ring leaking?
  Related: O-Rings, Cords, Molded Parts

  If you have the O-Ring seal with you, Does the seal appear damaged, deformed, swollen or physically changed in any way? If YES, then please refere Read more...

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• At What temperature can silicone caulk be applied?

  Phelps Silicone Sealants can be applied in a temperature range of -25°F to 120°F. However, for best application results the caulk itself Read more...

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• Does Open-Cell Foam absorb moisture or water and cause issues?

  The building codes recognizes both open and closed-cell foam as meeting the requirements of a true air-barrier. Since most water vapor is transported Read more...

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• What is the difference between butt and skive cut rings?

  A butt cut joint is typically a straight on a piece of packing when the ends are joined.These cuts or joints are primarily used in rotating applicatio Read more...

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• What gaskets can I use for Steam? What is superheated steam?
  Related: Compressed Gasket Sheet

  Steam can be found in plants in two forms: saturated and superheated. Saturated steam is standard boiler steam and has a definite temperature for each Read more...

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• How to estimate the friction an O-ring will develop?
  Related: O-Rings, Cords, Molded Parts

  The best way to determine running friction is during trial-runs because application factors can change the running friction. Friction, either break-ou Read more...

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• What is the difference between valve packing and pump packing?
  Related: Compression Packing

  In the case of pumps, the packing is generally designed to allow some leakage between the sleeve/shaft and packing to provide lubrication and heat rem Read more...

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• How do I find out the Pitch Circle Diameter (P.C.D.) of my gasket?

  The pitch circle diameter is the diameter that specifies the centre of bolt holes of your gasket. The P.C.D. is measured from the centre of the bore.

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• How do I calculate the cross-sectional (c/s) size and the quantity of Compression Packing rings?
  Related: Compression Packing

  To calculate the required number of packing rings you will need the stuffing box depth divide by the packing C/S and round to the nearest whole number Read more...

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• Why is post-cured silicone important for rubber for high temperature gasket applications?
  Related: Elastomers

  Some silicone rubber compounds utilize curing agents that require a secondary post-cure to finish the curing process. Although most silicones can pass Read more...

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• How high a temperature do Phelps Gasket Sheets support?

  Phelps carries a wide range of products to support various Temperatures, Pressure, and Media. In general Phelps' carries sheets that can go 2400° Read more...

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