Seal Case Considerations for Optimal Seal Performance
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. The case performs two functions. First, it provides stability, allowing the outside diameter (seal O.D.) to press fit snugly into […]
Seal Engineering Advice on Pressure, Load, and Media
Seals have an incredible impact on equipment performance. When used correctly, they 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 common mistakes […]
Overview of PTFE Fillers Used in Rotary Seals, Wear Rings, Piston Rings and Related 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 […]
Colonial Seal Explains the Difference Between Metal OD and Rubber-Covered Seals
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 Explained
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 […]
How Costly is Your Machine’s Downtime?
Whether you are shutting your machinery down to perform scheduled maintenance or to repair a failed internal component, the most important factor to consider is how to minimize the equipment’s downtime. Colonial Seal Company realizes how costly repairs to your machinery are when you consider maintenance costs as well as lost production time and is […]
Rotary Seal Lip Design & Geometry
Probably the most critical design feature of any seal design is the contact point or interface between the sealing lip and application shaft or housing if it’s an external seal. Typically, the sealing lips are made of an elastomeric material such as NBR, Viton, PTFE, etc. Apart from the elastomeric lip material, a critical design […]
