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Sizing O-rings and grooves used to involve a lot of calculator work because it required precise tolerances and surface finishes. It still does, but software such as Total InPHorm replaces the calculator with several easy-to-use programs that assist selecting O-rings and seals, specifying thermal conductors, and sizing support geometry. Typing nominal geometry for an O-ring into Total inPHorm brings up information such as this. To design a Chomerics product, users first choose one of two product classes. Each selection presents different image cues as explanations for where the components work best. After selecting a hydraulic rather than pneumatic application
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Products & Services
Butterfly Valves
Butterfly valves control flow through a circular disc or vane by turning the valve's pivot axis at right angles to the direction of flow in the pipe. They are normally used as throttling valves to control flow.
Back-up Rings
Back-up rings or anti-extrusion rings are washer-like devices used to prevent seals from extruding through gaps while under pressure. Seals are installed in the downstream side of the gland.
Piston Rings
Piston rings are used for sealing cylinders.  They can work at higher temperatures than elastomeric, fabric, or polymer seals.
AC Motors
AC motors include single, multiphase, universal, induction, synchronous, and gear motors. They also include servomotors.  
Hydraulic Fittings
Hydraulic fittings are parts used to connect hoses, pipes, and tubes in hydraulic lines and systems.
Product Announcements
Hi-Tech Seals, Inc. - O-Rings
The U.S. Air Force first regulated O-ring sizing under the system AS-568. A properly designed O-ring groove allows the O-ring to be squeezed diametrically out-of-round even before the application of... (read more)
Allied Metrics Seals & Fasteners, Inc. - Hydraulic Cylinder, Rod and Piston Seals
Manufacturer and distributor of hydraulic seals, pneumatic seals, o-rings, oil seals & gaskets for all industries worldwide. Your One Stop Source for Sealing Solutions Hydraulic cylinder... (read more)
Allied Metrics Seals & Fasteners, Inc. - Custom O-rings
Allied Metrics Seals & Fasteners, Inc. manufactures custom o-rings to match your specifications. (read more)
Daemar Inc. - Molded O-Rings
The O-ring is a simple and versatile seal that can be used in thousands of applications. O-rings are manufactured in a wide variety of compounds to suit your every need. (read more)
Daemar Inc. - Need components for crucial fluid power systems?
Supplying the pace of industry. With an extensive inventory of O-Rings, molded & quad-rings in a variety of compunds & a comprehensive selection of Shaft Seals, Oil Seals, Bearing... (read more)
 
Topics of Interest

Test reports provide a wealth of information for specifying seal materials. Dan Ewing Testing material hardness, fluid compatibility, compression set, and other factors helps predict how O-rings will...

Stamped retaining rings have a tapered radial width that decreases symmetrically from the center section to the free ends. Tapered construction permits the rings to remain circular when they are...

New design tools make arbitrary rules of thumb obsolete. O-ring Div. Simrit Div. of Freudenberg-NOK • Conventional seal-designs rules are obsolete. • Simrit has developed a design tool...

3.1 Alternative Elastomer and Plastic Seals For sealing rotary shafts in a pressurized system a lip seal has limitations, as discussed in section 3.2.9 above. Some of these limitations will apply to...

Widespread availability of valve-sizing software has made customers' purchasing of modulating control valves deceptively easy. However, the sizing calculations are not the whole story when specifying...