Rotating shaft seals can be found in virtually every facet of daily lives—household appliances, cars and trucks and across industries. Though often treated as a commodity product, their failure can result in costly downtime and lost productivity. Despite their use in countless applications, many still have basic questions about how to use them. Here are some frequently asked questions.
Kalrez Spectrum 7275 is a perfluoroelastomer that provides long life sealing in an array of aggressive chemical environments that typically make sealing difficult: ethylene oxide, acrylic monomers, silanes and chlorosilanes, and strong oxidizers such as nitric acid, chlorine and chlorine dioxide.
It has demonstrated improved chemical and compression set resistance
Attention: When installing GORE Gasket Tape Series 1000 in joints with multiple (2 or more) gaskets compressed with a single set of bolts or clamps, see the installation supplement “Installation on Joints with Multiple Gaskets,” for additional mandatory instructions.
Select the gasket width that provides enough material to align the gasket tape flush with the inner and outer diameter. Ensure full coverage of the glass surface. Excess material may exceed the outer diameter.
Most applications require a base layer of 6 mm (1/4") tape, which can accommodate deviation up to 1.5 mm (1/16") without shimming. Applications with deviation up to 2.3 mm (0.090") can utilize 9 mm (3/8") tape without shimming.
To effectively seal flanges with deviations beyond the maximum for the base layer, a shimming process is recommended. Use of 3 mm (1/8") GORE® Series 1000 shim tape as a shim layer will accommodate an additional 1.5 mm ( 1/16") of flange deviation. Ensure the shim layer has the same width as the base layer.
To achieve a reliable seal, adequate gasket stress must be applied during installation.
Typical minimum stress to seal values for GORE Gasket Tape Series 1000 are:
Perform an engineering calculation to determine the torque value for your specific application.
Industry guidance is available, for example in ASME PCC-1 Guidelines for Pressure Boundary Bolted Flange Joint Assembly, and EN 1591-1 Flanges and their Joints - Design Rules for Gasketed Circular Flange Connections - Part 1: Calculation.
However, ASME PCC-1 does not include glass-lined steel specialties. Therefore, it is advised to contact the equipment manufacturer for an adequate torque recommendation.
Vulcanized o-rings are manufactured by cutting a specific length of cord stock and joining the ends through a vulcanization process. The way those ends are cut, bevel cut or butt cut, directly affects joint strength, sealing continuity, and long-term performance. Understanding how each cut type behaves under compression and motion helps engineers and technicians select the most reliable option for their sealing application.
In the early 1980s, the Free State goldfields of South Africa were at the height of their productivity, with deep-level mining operations requiring robust, high-capacity equipment to manage water and ensure continuous ore extraction.
At the time, Ray’s Pumps and Service, a Welkom-based company formed 26 years earlier and employing 50 skilled
The optimum function of rotary shaft seals depends on many factors. One of them is the "wettability" of the sealing lip. This parameter plays a particularly important role with synthetic lubricants such as polyglycol. If wetting is too low, not only does wear on the sealing lip increase, but the contact with the rotating shaft can also damage the shaft itself. The engineers at Freudenberg Sealing Technologies (FST) and Freudenberg Technology
Liquefied natural gas (LNG) systems operate under some of the most extreme conditions in industrial engineering. At temperatures approaching -320°F, conventional sealing technologies quickly reach their limits.
Materials behave very differently at cryogenic temperatures. Elastomers lose elasticity, metals contract,
Today’s tech landscape is rapidly evolving, especially in the automotive and communications sectors. Driven by the increased adoption of 5G and 6G as well as advances in data processing, data speeds, and internet connectivity, all sorts of applications from medical devices to EV car batteries are getting faster, more efficient, and more connected.
To keep up with the demand and shifting requirements, manufacturers are now commonly developing
