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o-rings continuous molding technology

continuous molding technologyHistorically, technology to produce large diameter molded O-Rings has been limited by press and molding capabilities. One of Gallagher’s premier vendors, Parker Hannifin, has created a proprietary continuous molding technology which ensures the strength and reliability of large diameter FKM, HNBR, NBR and EPDM O-Ring seals. Parker’s solution eliminates the sealing performance problems sometimes found with common spliced rings and serpentine molding methods.

continuous molding technologySpliced O-Rings are a good solution for many non-critical applications. Potentially, they may be the weakest at their glued or vulcanized joints. Its physical properties, which differ to some degree from the rest of the ring, can affect a seal’s reliability. A twisted or fatigued splice, for example, can open, creating failure, leakage and contamination issues.

Parker’s homogenous molding technology is recommended for use in any large diameter O-Ring groove where spliced or serpentine molded rings may present reliability issues. It has applications in virtually every market, including: aerospace, chemical processing, energy, oil and gas (EOG), industrial, semiconductor processing, and many others.

Applications Features & Advantages
· Large chambers, vessels, lids, doors, and containers where spliced o-rings or serpentine rings present reliability issues

· Vacuum, high pressure and specialty semi-dynamic applications

· Anywhere the strength and integrity of homogenous molded rings are critical for reliable seal performance

 ·Consistent properties throughout the diameter of the ring

·Easier, more reliable installation versus serpentine molded o-rings

·Reduced potential contamination of leakage through spliced joints

·Material choices include basic FKM, HNBR, NBR, and EPDM materials*
Availability
Inside Diameter (ID) Sizes and Tolerances ID’s start at > 35.000” ± .220”**
Cross-Section Sizes & Tolerances

(Existing Tooling Available)

 .103” ± .006”

.139” ± .008”

.210” ± .010”

.275” ± .012”

.375” ± .012”

Custom cross-section sizes are also available with a  tooling cost
Materials FKM, HNBR, NBR, and EPDM.  Contact Gallagher for other material options
*For additional information, consult the Gallagher Engineering Department or a Parker Applications Engineer

** ID tolerance increases ± .010 for every additional 1” of diameter