Data / Specification Sheet • Camprofile Gaskets...pitch and a maximum groove depth of 0.5mm....
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Camprofile gaskets consist of a metal core, generally of stainless steel, with concentric grooves on either side. A sealing layer is usually applied on both sides, and depending on the duty the material for this layer can be graphite, PTFE (Teflon), Mica, Novus Therm or soft alloys like aluminium or silver. The sealing material layers protect the flange surfaces from damage as well as providing an excellent seal. Seating stress The following seating stress ranges offer reliable and effective performance. Seating Stress (20 o C) Layer Material Minimum Optimum Maximum (N/mm 2 ) (N/mm 2 ) (N/mm 2 ) Graphite 20 90 400 PTFE 20 90 400 Non Asbestos 40 125 400 Silver 125 240 450 The above values are based on parallel root form gaskets. The values have slight variations for convex root form gasket. As the company’s products are used for a multiplicity of purposes and as the company has no control over the method of their applications or use, the company excludes all conditions or warranties, expressed or implied by statute or otherwise, as to their products and/or their fitness for any particular purpose. Any technical co-operation between the company and the customer is given for customers assistance only, and without liability on the part of the company. Data / Specification Sheet • Camprofile Gaskets Properties Camprofile gaskets have a wide seating stress range which makes them: • Highly suitable for varying temperatures and pressures • Less sensitive to assembly faults (inaccurate bolt tensioning) • Suitable for both light and heavy designed flanges • Temperature resistant up to approx 1000 o C dependent on layer material • Resistant to media pressures up to 250 bar • When assembled the remaining thickness of the sealing material is extremely low (0.1 - 0.2mm) thus reducing leaks, fail rates and environmental pollution • Will not damage flange surface and is easily removed • Camprofile cores are re-usable after cleaning, inspection, profile tracing and relayering with new sealing material. This is of particular interest in the case of costly heat exchanger gaskets when using Monel and other exotic materials • Reduces maintenance costs and leakage. Flange Surface The recommended flange surface finish for camprofiles with sealing layers is from 3.2 to 6.3um Ra (125-250 RMS), also referred to as a smooth finish, however stock finish is acceptable. Core Thickness Core thickness depends on the assembly circumstances. When a camprofile is replacing an existing gasket, the use of a 4mm thick core (M21L and M41L) should not be problematic. Only in exceptional situations using a thicker gasket might cause unnecessary stress on existing pipe runs, especially in rigid systems. Piping System Core Thickness Thickness after assembly (mm) Core + Layers (mm) Existing 3 (recommended) Approx 3.1 - 3.4 New 4 Approx 4.1 - 4.4 Styles M21LM and M41LM are available in 4mm thickness only due to their construction. Tel : +27 (0) 11 915 0016/25/30 Fax : +27 (0) 11 915 0940 www.novussealing.co.za [email protected]
Transcript of Data / Specification Sheet • Camprofile Gaskets...pitch and a maximum groove depth of 0.5mm....
Camprofile gaskets consist of a metal core,generally of stainless steel, with concentricgrooves on either side. A sealing layer is usuallyapplied on both sides, and depending on theduty the material for this layer can be graphite,PTFE (Teflon), Mica, Novus Therm or soft alloyslike aluminium or silver. The sealing materiallayers protect the flange surfaces from damageas well as providing an excellent seal.
Seating stressThe following seating stress ranges offer reliable and effective performance.
Seating Stress (20oC)
Layer Material Minimum Optimum Maximum (N/mm2) (N/mm2) (N/mm2)
Graphite 20 90 400
PTFE 20 90 400
Non Asbestos 40 125 400
Silver 125 240 450
The above values are based on parallel root form gaskets. The values have slight variations for convex root form gasket.
As the company’s products are usedfor a multiplicity of purposes and asthe company has no control overthe method of their applications oruse, the company excludes allconditions or warranties, expressedor implied by statute or otherwise,as to their products and/or theirfitness for any particular purpose.Any technical co-operation betweenthe company and the customer isgiven for customers assistance only,and without liability on the part ofthe company.
Data / Specification Sheet • Camprofile Gaskets
PropertiesCamprofile gaskets have a wide seatingstress range which makes them:
• Highly suitable for varyingtemperatures and pressures
• Less sensitive to assembly faults(inaccurate bolt tensioning)
• Suitable for both light and heavydesigned flanges
• Temperature resistant up to approx1000oC dependent on layer material
• Resistant to media pressures up to250 bar
• When assembled the remainingthickness of the sealing material isextremely low (0.1 - 0.2mm) thusreducing leaks, fail rates andenvironmental pollution
• Will not damage flange surface and is easily removed
• Camprofile cores are re-usable aftercleaning, inspection, profile tracingand relayering with new sealingmaterial. This is of particular interestin the case of costly heat exchangergaskets when using Monel and otherexotic materials
• Reduces maintenance costs andleakage.
TDS 15. Rev 2
Flange SurfaceThe recommended flange surface finish for camprofileswith sealing layers is from 3.2 to 6.3um Ra (125-250RMS), also referred to as a smooth finish, however stockfinish is acceptable.
Core ThicknessCore thickness depends on the assembly circumstances.When a camprofile is replacing an existing gasket, theuse of a 4mm thick core (M21L and M41L) should notbe problematic. Only in exceptional situations using athicker gasket might cause unnecessary stress onexisting pipe runs, especially in rigid systems.
Piping System Core Thickness Thickness after assembly(mm) Core + Layers (mm)
Existing 3 (recommended) Approx 3.1 - 3.4New 4 Approx 4.1 - 4.4
Styles M21LM and M41LM are available in 4mm thickness only due to their construction.
Tel. +44 (0)1274 851273 Fax. +44 (0)1274 300303 www.flexitallic.eu Email. [email protected] : +27 (0) 11 915 0016/25/30 Fax : +27 (0) 11 915 0940 www.novussealing.co.za [email protected]
As the company’s products are used for a multiplicity of purposes and as the company has nocontrol over the method of their applications or use, the company excludes all conditions orwarranties, expressed or implied by statute or otherwise, as to their products and/or their fitnessfor any particular purpose. Any technical co- operation between the company and the customeris given for customers assistance only, and without liability on the part of the company.
Data / Specif ication Sheet • Camprof ile Gaskets
Parallel root coresAdvantages of parallel root cores:
• Uniform spread of stress at the cams
• Uniform spread of stress across the flangesurfaces
Convex root coresAdvantages of convex root cores:
• Highly suitable for underbolted flanges
• Effective seal at low seating stress
• The gasket design ensures a high seatingstress area (centre) and a lower seatingstress area (gaskets outside)
Gasket prof ilesAll profiles feature as standard a 1mm cam pitch and a maximum groove depth of 0.5mm.Alternative profiles are available on request e.g. 1.5mm cam pitch and a maximum groovedepth of 0.75mm (DIN profile).
Gasket shapesCamprofile gaskets can be made in a varietyof shapes and with pass- bars for heatexchanger applications. Accurate drawingsare required for non- standard and shapedcamprofiles.
Core material select ionThe core material is generally fabricated inidentical material to the piping system toprevent corrosion problems.
316 stainless steel camprofiles are generallyused with carbon steel pipe systems toprevent gasket corrosion.
Layer material select ionThe following table may be used todetermine the appropriate sealing layermaterial. Novus recommend the use ofgraphite layers for most applications. In cases where graphite may contaminatethe media or if not chemically resistant, analternative layer material should be chosen.
Material Temp ( oC) Max. Op Gas ApplicationMin Max Pressure (Bar) Tightness
Graphite - 200 450 250 Good Aggressive
PTFE - 200 260 100 Good Aggressive
Non- - 100 250 100 Good Gas & LiquidsAsbestos
Silver - 200 750 250 Good Aggressive
M1 8 L - Parallel root corewith integral centering ring
M2 0 L - Parallel root core without centering ring for male/ female, tongue &groove and groovedflanges.
M2 1 LM - Parallel rootcore with floatingcentering ring attachedoutside the sealing ring
M3 8 L - Convex root corewith integral centering ring
M4 0 L - Convex root corefor male/ female, tongue &groove and groovedflanges.
M4 1 LM - Convex rootcore with floatingcentering ring, attachedoutside the sealing ring
Tel. +4 4 ( 0 ) 1 2 7 4 8 5 1 2 7 3 Fax . +4 4 ( 0 ) 1 2 7 4 3 0 0 3 0 3 www.f lex itallic.eu Email. enquiries@f lex itallic.euTel : +27 (0) 11 915 0016/25/30 Fax : +27 (0) 11 915 0940 www.novussealing.co.za [email protected]
