O Ring Guide
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The comprehensive guide toOђ ring sealing systems, including > ● Oђ ring selection > ● General & high performance materials > ● Housing design & tolerances > ● Kits, cords & accessories > High Performance Sealing Technology size="-1">

EXAMPLE: PTFE spiral back-up ring touse with a 49.4mm ID x 4.1mm DS Oђ ring on a 50mm diameter shaft. Housing width 7.1mm, depth 3.5mm. Subsequent orders When re-ordering from James Walker, please state the Re-Order Part Number (eg, OB-03400X) shown on our documentation that acknowledges yourprevious order. Our computerised re-ordersystem will ensure swift service. Back-up rings Chart 50, metric sizes When ordering Chart 50 back-up rings tomatch our suggested metric shaft and cylinder sizes, please use: > The following information and exampleswill enable you to order the correct ֑O ring and...

Fluolion > (PTFE) Fluolion > ή is the registered trademark ofJames Walker products manufactured from polytetrafluoroethylene. PTFE is anextremely inert material, unaffected byvirtually every known chemical including most acids, alkalis and solvents. These exceptional properties make PTFE the ideal material for Oђ ring back-up rings.The flow characteristics of PTFE understress are usually a disadvantage in Oђ rings. Fluoroelastomers (FPM, FKM Fluoroelastomers operate efficiently under severe chemical conditions and at higher temperatures where many other sealmaterials cannot survive....

Explosive decompression damage isstructural failure in the forms of blistering, internal cracking and splits caused when the gas pressure, to which the seal is exposed, is rapidly reduced from high to low. Inorder to overcome many of the problems associated with high pressure gas systems, we have conductedintensive materials developmentprogrammes over the last 20 years. Much of this work was carried out in collaboration with equipment manufacturers, major oil and gasoperators, and research bodies.We offer five standard grades of EDresistant elastomer, all of which have been extensively...

FEP encapsulated Oђ rings have a core ofelastomer that is completely covered with aseamless sheath of FEP fluoropolymer.The elastomeric core is normally eitherfluorocarbon or silicone.An encapsulated Oђ ring is generally usedwhen: Although FEP encapsulated Oђ rings are most suited to static duties, they may beused with slow, short movements on rotaryapplications such as valve stem sealing. Their advantages are manifold, including: > ● Excellent chemical resistance to a widerange of media please consult our Technical Services Team for furtheradvice. > ֢׏ Astandard elastomer Oђ ring...

Pressure restrictions Oђ rings are generally suitable for pressures up to 100bar. Where higher pressures are involved, we recommend the use of back-up rings, as described onpage 10.For stuffing box applications werecommend piston-type grooves, although triangular grooves are generallyacceptable for pressures below 100bar(see Figures 7 and 8). > How Oђ rings work 72 and Chart 17000 . The amount ofallowable deformation varies according to the application, as follows: Rubber has a very high bulk modulus and istherefore virtually incompressible. This means that an Oђ ring must be deformed onthe...

These three boxedkits represent excellent value for money in terms of quantity, quality and convenience.Each kit has beencarefully assembled for maintenance engineers andequipmentrefurbishers who need a good selection of rings constantly available to suit many industrial applications.The boxes are designed to withstandindustrial maintenance activities, and have partitions to hold all items separately and securely. From the kitlayouts, users can readily see whenthey are running low on a particular size of ring or cord. Oђ ring sealing kit metric sizes Box containing nitrile (NBR) elastomer...

Compression packingsGaskets & jointingsHydraulic sealing products > BP4179 305/10mML-011653 Registered Office: Lion House, Oriental Road, Woking, Surrey GU22 8AP, UK. Reg. No. 2432592 Englandҩ James Walker 2005 size="-1">