Manual installation failed：
-Use tools without sharp edges
-Ensure that the O-Ring is not twisted, use installation aids to assist correct positioning
-Use installation aids wherever possible
-Do not over stretch O-Rings
-Do not stretch O-Rings made out of cord at the joint
Automatic installation failed:Automatic O-Ring installation requires good preparation. Thesurfaces of the O.Rings are frequently treated by several metho ds. For example: adding talcum powder, spraying Teflon or parylene on the surface.This offers a number ofbenefts during installation by
-Reducing the installation forces
-Non-stick effects, easy removal
The handling and installation of dimensionally unstablecomponents requires a great deal of experience. Reliableautomated installation thus demands special handling and packingofthe O-Rings. Please ask our specialists for further details.
Installation that requires crossing threads and splines:Installation Over Threads, Spines, Etc.
Should the O-Ring have to be stretched over threads, splines,keyways etc., then an assembly mandrel is essential. This mandrelcan either be manufactured in a soft metal or a plastic materialobviously without burrs or sharp edges.
Installation suggestions:Before starting installation, check the following points.
Lead-in chamfers made according to drawing?
Bores deburred and edges rounded?
Machining residues, e.g. chips, dirt and foreign particles, removed?
Screw thread tips covered?
Seals and components greased or oiled? Ensure media compatibility withthe elastomer material.
Do not use lubricants with solid additives, e.g. molybdenum disulphide or zinc sulphide.
Solution
1、Cleanliness
Foreign particles such as dust, dirt, metal chips, grit in the groovemay cause leakage and can damage the O-ring. Cleaning materialmust also be a medium which is compatible with the elastomer
2、Stretch
The inside diameter expansion to reach the groove duringassembly should not exceed 50%, For very small diameters, it isnecessary to cxcced this limit, If so, suficient time should beallowed for the O-ing to return to its normal diameter beforeclosing the groove assembly.
3、Lubrication
For static and dynamic applications lubrication is important forease of assembly, The greatest beneft in using a lubricant isobtained during the initial installation of the O-ring. Grease usedto ease assembly must be compatible. Do not use a lubricantcomposed of the same material as the O-ring. For example,silicone grease can be effectively used on EPDM seals, but notrecommended for VMQ seals. Common lubricants for O-rings are:
1)Hydrocarbon-based materials: Such as petrolatum, betterknown as petroleum jelly-Vaseline®, But it is also availablein liguid form.
2)Silicone-based greases: Such as Dow Coming DC-55, ageneral-purpose grease. Silicone-based greases have a wideworking temperature range and are compatible with severalkinds of rubber materials.
3)Barium-based greases: For high temperature applications andapplications requiring chemical compatibility.
4)Other formulations: Such as Celvacene®, Celvacene containsno silicone and is specifically engineered for use in highvacuum pump applications.
As a professional design and manufacturing company specializing in precision rubber products with 15 years of industry experience, DOIT has established a benchmark in niche segments by leveraging its outstanding technical capabilities: The global market share of its automotive O-ring seals reaches 40%, while its Micro Pump Seal (a core component for micro-pump-valve systems) leads the industry in both dimensional precision and service life - outperforming competitors in ensuring leak-free performance for miniature fluid control devices. Meanwhile, the company is equipped with a clean medical shop dedicated to producing high-performance medical silicone seal that meet stringent medical grade standards, and also offers complementary precision sealing solutions such as Precision O-ring Seal and Mini Valve Seal for medical devices. These products, when combined with critical components such as check valve, form a complete sealing system that further ensures the reliability and safety of medical devices.
DOIT is committed to providing customers with timely and professional technical service support, addressing their specific needs with customized solutions. We look forward to hearing from you.