EMKA (UK) Ltd Patricia House Bodmin Road Coventry CV2 5DG West Midlands, England

Transcription

1 EMKA (UK) Ltd Patricia House Bodmin Road Coventry CV DG West Midlands, England Tel: +(0) 7 0 Fax: +(0) 7 87 Info@emka.co.uk

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44 Web: Phone.: + (0) Fax: + (0) EMKA Profiles Ltd Units.0- Fort Ind Park Birmingham B 7AR EMKA Profiles Ltd Manufacturing & Delivery Programme Sponge profiles Spliced profiles Adhesive backed foam Push fit glazing gaskets Claytonrite glazing profiles with locking insert Pr EMKA Profiles Limited Global provider of sealing solutions.

45 Web: Phone.: + (0) Fax: + (0) EMKA Profiles Ltd Units.0- Fort Ind Park Birmingham B 7AR EMKA Profiles Ltd Manufacturing & Delivery Programme Manufacturing tolerances According to DIN ISO 0 Tolerances of custom length based upon DIN ISO 0 - Compression recommended for bubble sealing profiles The compression of our sealing edge protection bubble profile should have a maximum of 0% as otherwise the compression and recovery can be adversely affected. It is recommended the profile should be compressed between 0-0%. Should the profile have two cavities then this value should be applied to each cavity. See diagram below: The compression set of sponge rubber profile. An essential for the application of sealing is the enduring deformation. The most common characteristic is the compression set (DVR) ASTM D9.To determine this value, a cylindrical test body is compressed by -% and then stored for a predetermined time at a specific temperature. Thirty minutes after release, the height is measured at room temperature again, and from the result, the enduring deformation can be identified. A DVR of 0 would indicate that the test body has reached its original height (unlikely in reality), a DVR of 00% shows that the test body has no recovery and would remain completely deformed. Why is the compression set an important factor when choosing a suitable seal? A flange gasket is compressed to a specified thickness and exerts a pressure on the surface of the flange. After a while this pressure reduces because the rubber deforms and takes a set If the DVR is too high, the elasticity performance and the sealing effect decrease and the seal may cease to function. Pr EMKA Profiles Limited Global provider of sealing solutions.

46 Web: Phone.: + (0) Fax: + (0) EMKA Profiles Ltd Units.0- Fort Ind Park Birmingham B 7AR EMKA Profiles Steel and Wire Carriers By using either steel or wire carrier, the edge protection sections will grip well, without the use of adhesives or tapes. However, the use of a steel carrier will have a higher clamping effect than a wire carrier and is advised where there is high vibration applications. The disadvantage of a profile with an unbroken steel carrier is a restricted bending radius. This can be solved by breaking the connecting sprags. However, an uneven surface may develop if this is done. In most technical applications the aesthetics will be irrelevant. Steel / Wire carrier The choice of either a steel or wire carrier largely depends on the application situation, and the desired appearance. (where aesthetics are important, the hungry horse effect can (Where aesthetics are important, the hungry horse effect can be disguised) Formed Wire carrier Single bar carrier Double bar carrier Pr EMKA Profiles Limited Global provider of sealing solutions.

47 EMKA Profiles Ltd Unit 0, Fort Industrial Park Fort Parkway, Castle Bromwich Birmingham B 7AR, West Midlands Tel: +(0) Fax: +(0) TOLERANCES ISO 0-99 EXTRUSIONS Nominal Dimension Class E Class E Class E Above (mm) Up to (mm) +/- (mm) +/- (mm) +/- (mm) TOLERANCES ISO 0-99 CUT LENGTHS Nominal length Class L Class L Class L Above (mm) Up to (mm) +/- (mm) +/- (mm) +/- (mm) % 0.% 0.0% Pr EMKA Profiles Limited Global provider of sealing solutions.

48 Web: Phone.: + (0) Fax: + (0) Pr Comparative chart of material features EMKA Profiles Ltd Units.0- Fort Ind Park Birmingham B 7AR EMKA Profiles Limited Global provider of sealing solutions. Headings Natural rubber SBR Neoprene Nitrile EPDM Silicone Viton Chemical name SAE 00 & ASTM D-000 Designation ASTM D-8 Designation Minimum temperature Maximum temperature Usual shelf life Advantages Styrene butadiene Polyisoprene Polychloroprene Acrylonitrilebutadiene Ethylenepropylenedieneterpolymer Polysiloxane AA AA, BA BC, BE BF, BG, BK BA, CA FC, FE, GE HK NR SBR CR NBR EPDM VMQ FKM -C (-7F) 0C (F) to years -C (-7F) 70C (8F) to years ) Outstanding ) Very good elasticity flexibility at low ) Good flexibility temperatures at low temperatures -0C (-0F) 00C (F) to 0 years ) Good resistance to flame ) Very good resistance to weather, ozone, and natural ageing ) Very good resistance to alkalis and acids -0C (-0F) 00C (F) to 0 years ) Very good resistance to oils and fuel ) Superior resistance to petroleum-based hydraulic fluids ) Wide range of operating temperatures ) Very good resistance to alkalis and acids -C (-7F) 0C (7F) to 0 years ) Excellent heat, ozone and sunlight resistance ) Very good flexibility at low temperatures ) Good resistance to alkalis, acids and solvents ) Superior resistance to water and steam -C (-8F) C (7F) Up to 0 years ) Flexible at extreme temperatures ) Low compression set ) Excellent ultraviolet, weather and ozone resistance ) Inert, odourless, tasteless and nontoxic Fluorinated hydrocarbon -0C (-0F) C (7F) Up to 0 years ) Excellent resistance to a wide variety of oils, fuel, solvents and acids at high temperatures )Very good impermeability to gases and steam ) Very good weather, ozone and sunlight resistance Restrictions ) Poor heat, ozone and sunlight resistance ) Very little resistance to oils, fuel and to hydrocarbon solvents ) Poor heat, ozone and sunlight resistance ) Very little resistance to oils, fuel and to hydrocarbon solvents ) Poor to low resistance to aromatic solvents ) Limited capacities at low temperatures ) Low resistance to ozone, sunlight and natural ageing ) Poor resistance to polar solvents ) Poor resistance to oils, fuels and to hydrocarbon solvents ) Poor abrasion and tear resistance ) Poor resistance to solvents, alkalis and acids ) Will be severely attacked by some solvents such as esters, ethers and acetates Legend: E= Excellent, VG = Very good, G = Good, F= Fair, P = Poor Tensile strength E F - G VG VG F - G VG VG Ultimate elongation VG - E G G G G VG - E F - G Compression set G G F - G G G VG - E VG - E Heat resistance F F - G F - G G VG - E E E Resistance to flame P P G P P F - G VG - E Resilience E F - G VG F - G G G F Abrasion resistance E VG - E VG - E VG - E VG - E P - F F - G Water resistance E VG - E G VG - E E VG - E G Acids F - G F - G G G G F G Alcohol G G VG F - G F - G G F - G Animal & vegetable oils F F G VG G G E Oils & Fuels P P F - G G - E P P - F E Hydrocaarbon solvents P P G E P P - F E Oxygenic solvents G G P - F P VG F P

49 EMKA Profiles Ltd Units.0- Fort Ind Park Birmingham B 7AR Phone.: + (0) Fax: + (0) info@emka-profiles.co.uk Web: profiles.co.uk Pr - Comparative vulcanisate properties of NR and other SR's Rubber AU SBS TM PYMQ EAM EPDM (X)IIR's FKM CSM ECO CR ACM NBR BR SBR IR NR Properties Tensile strength Tensile strength with reinforcing fillers Maximum elongation Abrasion resistance with reinforcing fillers Tear resistance Rebound Low temperature flexibility Heat resistance Oxidative resistance UV Resistance Weather and ozone resistance Oil resistance Motor fuel resistance Acid resistance Alkali resistance Flame resistance Electrical resistivity Gas permeation Compression set - 0C + 0C + 00C Legend: = excellent, = insufficient EMKA Profiles Limited Global provider of sealing solutions.