Pressure Effects on Seal Performance
Standard shaft seals or rotary shaft seals are typically found in a low-speed or low-pressure environment. As the speed of the shaft increases, the maximum allowable pressure decreases, and as pressure increases or speed increases, the design of the seal needs to change to ensure the life of the seal. This article will discuss the […]
Seal Case Design: Key Considerations
In most shaft seals, the elastomeric portion is chemically bonded to a stamped metal case. Non-elastomeric members such as PTFE, which is more difficult to bond, may be mechanically clamped in place inside the case. For seal case design this performs two functions. First, it provides stability, allowing the outside diameter (seal O.D.) to press […]
Seal Engineering Advice on Pressure, Load, and Media
Seal engineering has an incredible impact on equipment performance. When used correctly, it can extend cylinder life, prevent leaks, improve actuator positioning accuracy, minimize friction, and prolong energy.There are several factors that engineers should consider after seal creation to ensure productive performance. Although selecting and testing seals may seem daunting, reasonable experience helps engineers avoid […]
PTFE Fillers in Sealing Products
PTFE (Polytetrafluoroethylene) has become a commonly used material in sealing applications where other materials do not meet temperature, chemical compatibility, friction, or wear requirements. Many customers are unaware that “fillers” may be added to PTFE in order to enhance certain characteristics not found in virgin PTFE. Virgin PTFE possesses “creep” behavior that reduces effectiveness in […]
Mechanical Seals Line Card
Seal Guide Poster
Metal O.D. & Rubber-Covered Seals Compared
Over the years, customers have asked us what’s the difference between a rubber O.D. and a metalO.D. and if there are any special considerations when replacing a metal-cased seal with a rubber-covered one? The following article explains the differences between metal O.D. & rubber O.D. seals. To contact us, or receive more information on this […]
Gaskets and FDA Compliance
Frequently asked to provide gaskets complying with Food and Drug Administration (FDA) regulations, gasket manufacturers are often left to face this broad and complex area that often extends far beyond consumable, digested products. This information will help explain many of the requirements for FDA compliant gaskets and why they exist. What does it mean to […]
Elastomer Durometer: Choosing the Right Hardness for Seals
When fielding questions about seal design and utilization the customer is often asked if they know the hardness of the rubber or lip material. It is important to know the hardness of the rubber material, as the hardness does have an impact on seal performance. Hardness is defined as resistance to indentation. The degree of measurement of […]
