TRELLEBORG SEALING SOLUTIONS. Quad-Ring YOUR PARTNER FOR SEALING TECHNOLOGY

Transcription

1 TRELLEBORG SEALING SOLUTIONS Quad-Ring YOUR PARTNER FOR SEALING TECHNOLOGY

2 Your Partner for Sealing Technology Trelleborg Sealing Solutions is a major international developer, manufacturer and supplier of seals, bearings and molded components in polymers. We are uniquely placed to offer dedicated design and development from our market-leading product and material portfolio: a one-stop-shop providing the best in elastomer, silicone, thermoplastic, PTFE and composite technologies for applications in aerospace, industrial and automotive industries. With 50 years of experience, Trelleborg Sealing Solutions engineers support customers with design, prototyping, production, test and installation using state-of-the-art design tools. An international network of over 70 facilities worldwide includes over 20 manufacturing sites, strategically-positioned research and development centers, including materials and development laboratories and locations specializing in design and applications. proprietary compounds and a range of unique products. Trelleborg Sealing Solutions fulfills challenging service requirements, supplying standard parts in volume or a single custom-manufactured component, through our integrated logistical support, which effectively delivers over 40,000 sealing products to customers worldwide. Facilities are certified to ISO 9001:2008 and ISO/TS 16949:2009. Trelleborg Sealing Solutions is backed by the experience and resources of Trelleborg Group, one of the world s foremost experts in polymer technology. ISO 9001:2008 ISO/TS 16949:2009 Developing and formulating materials in-house, we utilize the resource of our material database, including over 2,000 The information in this brochure is intended to be for general reference purposes only and is not intended to be a specific recommendation for any individual application. The application limits for pressure, temperature, speed and media given are maximum values determined in laboratory conditions. In application, due to the interaction of operating parameters, maximum values may not be achieved. It is vital therefore, that customers satisfy themselves as to the suitability of product and material for each of their individual applications. Any reliance on information is therefore at the user s own risk. In no event will Trelleborg Sealing Solutions be liable for any loss, damage, claim or expense directly or indirectly arising or resulting from the use of any information provided in this brochure. While every effort is made to ensure the accuracy of information contained herewith, Trelleborg Sealing Solutions cannot warrant the accuracy or completeness of information. To obtain the best recommendation for a specific application, please contact your local Trelleborg Sealing Solutions marketing company. This edition supersedes all previous brochures. This brochure or any part of it may not be reproduced without permission. All trademarks are the property of Trelleborg Group. The turquoise color is a registered trademark of Trelleborg Group. 2015, Trelleborg Group. All rights reserved.

3 Contents Description... 2 Applications... 3 Materials... 4 Characteristics and inspection of elastomers... 4 Design Instructions... 6 Installation Instructions Installation Recommendations Quad-Ring Seal dimensions in dependence on the American O-Ring standard AS Installation Recommendation Quad-Ring Seal with Back-up Ring for Radial-Dynamic Application (Reciprocating) - "Extentral Sealing" Installation Recommendation Quad-Ring Seal with Back-up Ring for Radial-Dynamic Application (Reciprocating) - "Internal Sealing" Installation Recommendation Quad-Ring Seal and Back-up Ring (Uncut) for Rotary Application - "Internal Sealing" General quality criteria Guidelines for the storage of polymer products based on ISO Conversion Tables

4 Description Original Quad-Ring Seals are four lipped seals with a specially developed sealing profile. A wide range of elastomer materials for both standard and special applications allows practically all liquid and gaseous media to be sealed. Quad-Ring Seals are vulcanized as a continuous ring. They are characterized by their annular form with a four lipped profile. Their dimensions are specified with the inside diameter d 1 and the cross-section W (Figure 1). Method of Operation Quad-Ring Seals are self energizing double-acting sealing elements. The forces acting in radial or axial direction due to the installation give Quad-Ring Seal its initial leaktightness (initial squeeze). These forces are superimposed by the system pressure. An overall sealing force is created which increases with increasing system pressure (Figure 2). Under pressure, the seal behaves in a similar way to a fluid with high viscosity and the pressure is transmitted uniformly to all sides. d1 W W Figure 1 Quad-Ring Seal dimensioning Quad-Ring Seals are supplied in dependence on the American O-Ring Standard AS 568. Advantages In contrast to the O-Ring, Quad-Ring Seal has the following advantages: Avoids twisting in the groove. Due to its special profile, the seal does not tend to roll in the groove during reciprocating movement. Low friction. Very good sealing efficiency. Due to an improved pressure profile over Quad-Ring Seal cross-section, a high sealing effect is achieved. A lubricant reservoir formed between the sealing lips improves start up. Unlike an O-Ring, the mould line flash lies in the trough, between and away from the critical sealing lips. Pressure Figure 2 Quad-Ring Seal squeeze with and without system pressure 2

5 Applications Fields of Application Quad-Ring Seals can be used for a wide range of different applications. Quad-Ring Seal is used predominantly for dynamic sealing functions. It's use is always limited by the pressure to be sealed and the velocity. Dynamic applications For sealing of reciprocating pistons, rods, plungers, etc. For sealing oscillating, rotating or spiral movements on shafts, spindles, rotary transmission leadthroughs, etc. Static applications As a radial-static seal, e.g. for bushings, covers, pipes, etc. As an axial-static seal, e.g. for flanges, plates, caps, etc. As an energizer element for elastomer energized hydraulic seals where there is a risk of the O-Ring twisting. Quad-Ring Seal for rotary application In applications with small cyclic periods of activity, Quad-Ring Seal can also be used for sealing rotating shafts. The following points according to the rotary seal principle should be observed: The rotary seal principle is based on the fact that an elongated elastomer ring contracts when heated (Joule effect). With the normal design criteria the seal ring inside diameter d 1 will be slightly smaller than the shaft diameter, and the heat generated by friction would cause the ring to contract even more. This results in a higher pressure on the rotating shaft so that a lubricating film is prevented from forming under the seal and even higher friction occurs. The result would be increased wear and a premature failure of the seal. Using the rotary seal principle, this is prevented by the seal ring being selected so that its inside diameter is approximately 2 to 5% larger than the shaft diameter to be sealed. The installation in the groove means that the seal ring is compressed radially and is pressed against the shaft by the groove diameter. The seal ring is thus slightly corrugated in the groove, a fact which helps to improve the lubrication. The rotary seal principle can be neglected at peripheral speeds of less than 0.5 m/s. When using the Quad-Ring Seal as a rotary seal, the use of a suitable surface coating is recommended. Please note the information given in our brochure "Friction-free Running" or contact your local Trelleborg Sealing Solutions company for further details. Technical Data Quad-Ring Seals can be used for a wide range of applications. The choice of a suitable material is determined by the temperature, pressure and media. In order to assess the suitability of Quad-Ring Seal as a sealing element for a given application, the interaction of all the operating parameters have to be taken into consideration. Working pressure, dynamic application: Reciprocating up to 5 MPa ( 50 bar) without Back-up Ring up to 30 MPa (300 bar) with Back-up Ring Rotating up to 15 MPa (150 bar) with Back-up Ring Working pressure, static application: up to 5 MPa ( 50 bar) without Back-up Ring up to 40 MPa (400 bar) with Back-up Ring Please note the permissible extrusion gaps, see Table IV. Speed: Reciprocating: up to 0.5 m/s Rotating: briefly up to 2.0 m/s Operating temperature range: depending on material and media resistance, for: General applications, NBR: -30 C to C General applications, FKM: -18 C to C When assessing the application criteria, the transient peak and continuous operating temperature and the cyclic duration factor must be taken into consideration. For rotating applications, the increases in temperature due to frictional heat must be taken into account. Media: With the large range of materials, each with different properties, which are now available, it is possible to seal against practically all liquids, gases and chemicals. Please note when selecting the most suitable material the information given in the broschure Materials - Chemical Compatibility Guide. 3

6 Materials The available standard elastomer materials are shown in Table I. If no particular specifications are given for the material, NBR (Nitrile Butadiene Elastomer) in 70 Shore A will be supplied. Table I Standard materials for Quad-Ring Seals Material-Type NBR Acrylonitrile-Butadien Rubber FKM Fluorocarbon Rubber Material code N7004 V7002 Hardness Shore A (±5) Color Black Black Operating temperature -30 C to +100 C -18 C to +200 C range ( C) Description Standard material for hydraulics and pneumatics. Mineral oil-based hydraulic fluids, animal and vegetable oils and fats, aliphatic hydrocarbons, silicone oils and greases, water up to +80 C Mineral oils and greases, flame retardant liquids, aliphatic, aromatic and chlorinated hydrocarbons, petrol, 99 octane petrol, diesel fuels, silicone oils and greases Further special materials on request. Due to the different conditions in the field, e.g. different media, the given material properties and operating temperature ranges could be affected and changed. Tests should be done for each application. Characteristics and inspection of elastomers Hardness One of the most often named properties regarding Polymer materials is hardness. Even so the values can be quite misleading. Hardness is the resistance of a body against penetration of an even harder body - of a standard shape defined pressure. There are two procedures for hardness tests regarding test samples and finished parts made out of elastomer material: 1. Shore A/D in accordance with ISO 868 / ISO 7619 / ASTM D 2240 Measurement for test samples 2. Durometer IRHD (International Rubber Hardness Degree) in accordance with ISO 48 / ASTM 1414 and 1415 Measurement of test samples and finished parts The hardness scale has a range of 0 (softest) to 100 (hardest). The measured values depend on the elastic qualities of the elastomers, especially on the tensile strength. The test should be carried out at temperatures of 23 ±2 C not earlier than 16 hours after the last vulcanisation process (manufacturing stage). If other temperatures are being used this should be mentioned in the test report. Tests should only be carried out with samples which have not been previously stressed mechanically. Hardness tests in accordance with Shore A/D The hardness test device Shore A (indentor with pyramid base) is a sensible application in the hardness range 10 to 90. Samples with a larger hardness should be tested with the device Shore D (indentor with spike). Test specimen: Diameter min. 30 mm Thickness min. 6 mm Upper and lower sides smoth and flat When thin material is being tested it can be layered providing minimal sample thickness is achieved by a maximum of 3 layers. All layers must be at minimum 2 mm thick. The measurement is done at three different places at a definded distance and time. Shore A Shore D mm mm mm Figure 3 Indentor according to Shore A / D 4

7 Hardness test according to IRHD The test of the Durometer in accordance with IRHD is used with test samples as well as with finished goods. The thickness of the test material has to be adjusted in accordance with the range of hardness. In accordance with to ISO 48 there are two hardness ranges. Soft: 10 to 35 IRHD Sample thickness 10 to 15 mm / procedure "L" Normal: over 35 IRHD Sample thickness 8 to 10 mm / procedure "N" Sample thickness 1.5 to 2.5 mm / procedure "M" The hardness determined with finished parts or samples usally vary in hardness determined from specimen samples, especially those with a curved surface. O-Ring, NBR 75 Shore A Hardness Vertically carried pole 61 Soft, ISO 48 L / CL Normal, ISO 48 N / CN Normal, ISO 48 M / CM Thickness of test-buttons [mm] Shore A, DIN IRDH, ISO 48 CN IRDH, DIN ISO 48 CM mm Figure 5 Range of hardness depending on sample thickness and test method 5 mm 2.5 mm A A A Figure 4 Indentor according to IRHD h1 h2 h3 Influencing parameters on the hardness test for polymer materials Various sample thicknesses and geometries as well as various tests can show different hardness values even though the same materials have been used. 1 concave 2 plain h1 < h2 < h3 3 convex Figure 6 Range of hardness depending on surface geo metry for the equivalent material cha racteristics With equivalent material characteristics of the elastomer sample B, the indentor penetrates the deepest at the surface 3 (convex) and therefore establishes the softest area. The measurement of hardness of small Quad-Ring seals is difficult. The only way that the hardness can accurately be measured is to cut a slice from the Quad-Ring and measure the hardness of this. However, if this is not possible, the 5

8 hardness of the small Quad-Ring can be measured at the radius or sealing lip as agreed between the customer and Trelleborg Sealing Solutions. This hardness measurement though should only be used to compare the hardness values of different production lots and not to define the real hardness of the individual seal. initial squeeze Design Instructions Choice of Quad-Ring Seal size The chosen cross section W should be in an appropriate ratio to the inside diameter d 1. For static applications, Quad-Ring Seals with smaller cross sections may be used. Elongation - Compression With a radial sealing configuration, Quad-Ring Seal in an internal groove - "external sealing" - should be stretched over the root of the groove. The maximum elongation in the installed state is 6 % for Quad-Ring Seals with an inner diameter >50 mm and 8% for Quad-Ring Seals with an inner diameter <50 mm. With external grooves - "internal sealing" applications - Quad-Ring Seal is installed in compressed state. The maximum compression in the installed state is 3 %. Information regarding elongation and compression are for guidance only. Exceeding these values will result in an unallowable increase or decrease in Quad-Ring Seal cross section. Consequently this can affect the service life of the seal. As a rule of thumb: a 1% increase in the inside diameter corresponds to a reduction in the cord diameter of approx. 0.5 %. Initial Squeeze An initial sqeeze of Quad-Ring Seal in the groove is essential to ensure its function as a primary or secondary sealing element (Figure 7). It serves to: Achieve the initial sealing capability Bridge production-dependent tolerances Assure defined frictional forces Compensate for compression set Compensate for wear. Depending on the application, the following values apply for the initial squeeze: Sealing force with and without system pressure Dynamic applications: 6 to 18 % Static applications: 8 to 25 % pressure = 0 pressure > 0 Figure 7 Sealing force with and without system pressure 6

9 Methods of Installation of Quad-Ring Seals Quad-Ring Seals can be used in components in a wide variety of ways. At the design stage, the subsequent installation situation should be taken into consideration. To avoid damage during installation it is not recommended to assemble the Quad-Ring Seal over edges or bores. Where long sliding movements are involved, the seal seat should be recessed, if possible, or the sealing elements arranged so they only have to travel short distances during installation. Radial Installation (static and dynamic) Internal sealing Quad-Ring Seal size should be selected so that the inside diameter d 1 has the smallest possible deviation from the diameter to be sealed d 5 (Figure 8). External sealing Quad-Ring Seal size should be selected so that the inside diameter d 1 is equal to or smaller than the groove root diameter d 3. Axial-static Installation During axial-static installation, the direction of the pressure should be taken into consideration when choosing Quad-Ring Seal size (Figure 9). With internal pressure, Quad-Ring Seal outside diameter should be chosen approx. 1 to 2 % larger than the groove outside diameter. With external pressure, Quad-Ring Seal is chosen approx. 1 to 3 % smaller than the groove inside diameter. d 5 d 1 d 3 W W Figure 8 Radial installation, static and dynamic d 8 d 8 d 7 d 7 pressure inside pressure from outside Figure 9 Axial installation, static 7

10 Groove Design Rectangular Groove Quad-Ring Seals are installed in rectangular grooves. The groove widths specified in our recommendations already take into account a limited swelling of the seals. The maximum permissible gap (Table IV) must be taken into consideration. free of burrs r1 Surfaces Under pressure, elastomers adapt to irregular surfaces. For gas or liquid-tight joints, however, certain minimum demands must be made on the surface quality of the surfaces to be sealed. Fundamentally grooves, scratches, pit marks, concentric or spiral machining scores, etc. are not permissible. Higher demands must be placed on the surface quality of dynamic mating surfaces than on static sealing surfaces. At present, no uniform definitions exist for describing the mating surfaces. In practice, the specification of the R a value is not sufficient to permit an assessment of the surface quality. Our recommendations therefore contain amongst others various terms and definitions in accordance with DIN 4768 and DIN EN ISO Figure 10 Groove Design Table II Suface Finish Type of Load Surface R t μm R z μm R a μm Radial-dynamic Mating surface * (bore, rod, shaft) groove flanks, groove diameter Radial-static Axial-static Mating surface groove flanks, groove diameter * spiral free grinding. For pulsating pressures Mating surface groove flanks, groove diameter The above is for guidance only and covers the majority of sealing applications. However Trelleborg Sealing Solutions should be consulted in areas of particular concern. 8

11 Lead-in Chamfers Bearing in mind the subsequent installation requirements during the design of Quad-Ring Seal can help to eliminate possible sources of damage and seal failure from the outset. Since Quad-Ring Seals are always fitted oversize, lead-in chamfers and rounded edges must be provided (Figure 11 and Figure 12). rounded, polished The lengths of the Lead-in Chamfers are specified in Table III. The permissible surface roughness of the Lead-in Chamfer is defined as follows: R z < 6.3 μm R a < 0.8 μm Table III Lead-in chamfers Lead-in chamfers length Z min Quad-Ring Seal cross section W up to up to up to up to up to above 7.00 Figure 12 Lead-in chamfer for rods, shafts Sealing Gaps The tolerances and permissible gap dimensions S given in the installation Table IV, must be maintained. If the extrusion gap is too large, there is a risk of seal extrusion which can result in the destruction of the Quad-Ring Seal. The permissible gap S between the parts to be sealed depends on the system pressure, the cross section and the shore hardness of the Quad-Ring Seal. Z Pressure rounded polished Radial clearance S Z Figure 13 Radial clearance "S" Figure 11 Lead-in chamfer for bores, tubes 9

12 Installation of Quad-Ring Seals with Back-up Rings Another possible method of protecting Quad-Ring Seal from extrusion into the gap is the additional installation of Back-up Rings. The installation of Back-up Rings is generally recommended when at least one of the following conditions exists: High pressures - above approx. 5 MPa (50 bar) Large tolerances or gaps between the parts to be sealed High temperatures or temperature fluctuations during expansion of the parts under pressure High degree of contaminants in the system. Where the pressure acts from only one side, it is sufficient to install a Back-up Ring on the side away from the pressure. Where the pressure acts from both sides, two Back-up Rings - one on each side of Quad-Ring Seal - are necessary. A complete summary of our Back-up Ring product range can be found in the catalogue "O-Rings and Back-up Rings". The following tables show Quad-Ring - Back-up Ring combinations: "External" sealing installation, Table VI. "Internal" sealing installation, Table VII. Rotary sealing installation, Table VIII. The selection series contains two Back-up Ring types: Split, spiral-type design, preferred for both external and internal sealing applications (bore and shaft) One-piece design, preferably for internal sealing applications (shaft) under radially-dynamic loads. The usage of other Back-up Ring types than given is also possible. The standard material for the Back-up Ring is virgin PTFE. Special materials, e.g. for injection moulded Back-up Rings, on request. Installation Instructions General recommendations 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 with the elastomer material. TSS recommends to use the fluid to be sealed. Do not use lubricants with solid additives, e.g. molybdenum disulphide or zinc sulphide. Manual installation Use tools without sharp edges! Ensure that the Quad-Ring Seal is not twisted, use installation aids to assist correct positioning Use installation aids wherever possible Do not over stretch Quad-Ring Seals Installation over threads, splines etc. Should the Quad-Ring Seal have to be stretched over threads, splines, keyways etc., then an assembly mandrel is essential. This mandrel can either be manufactured in a soft metal or a plastic material obviously without burrs or sharp edges. Automatic installation Automatic seal installation requires good preparation. The surfaces of the Quad-Ring Seals are frequently treated by several methods (see brochure "Friction-free Running"). This offers a number of benefits during installation by Reducing the installation forces Non-stick effects, easy removal The handling and installation of dimensionally unstable components requires a great deal of experience. Reliable automated installation thus demands special handling of seals. Please ask our specialists for further details. 10

13 Installation Recommendations b 1 r 1 r 1 S t 1 W t 1 S b 4 t W b 3 b 2 h Figure 14 Installation drawing Table IV Installation Dimensions Cord Diameter W Groove Dimensions Radius 3) Groove Depth * 1) Groove Width ** Dynamic Static b 1, b b b r 1 t t/h ) 2) ) 2) ) 2) ) 2) ) 2) ) 2) ) 2) ) 2) Explanation for *, **, see page 12 1) Also O-Ring grooves can be generally used. Friction may be higher at dynamic application. Back-up Rings must be adatped. 2) When using Back-up Rings the groove is to be increased by the Back-up Ring thickness. 3) If a Back-up Ring is used the recommended radius should always be r1 = 0.25 ±0.2 mm. Radial Gap S max. 11

14 General Notes * The values quoted for groove depth are average values and apply under medium load conditions in hydraulic applications. For eccentric piston positions or bending of the rod and in vacuum and low-pressure applications, the groove depth should be reduced and/or the initial squeeze increased. ** If a greater swelling of the seal material is anticipated, the groove width can be increased by up to approx. 20%. The installation dimensions (Table IV, Table VI, Table VII and Table VIII) apply to Quad-Ring Seals of NBR. Basically all moulds for Quad- Ring Seal production are laid out for shrinkage behaviour of NBR materials. Therefore the inside diameter and cross section of Quad-Ring Seals out of elastomers with a higher shrinkage, such as VMQ or FKM, may differ slightly. FKM Quad-Ring Seals generally will have slightly smaller dimensions than the corresponding NBR sizes. Owing to this in particular cases the groove depth must be adapted or rather reduced depending on the application and the nominal sizes of the seal. As a guide value for the higher shrinkage of FKM materials a difference of approximately 0.5 % may be assumed. Exact values depend on the material and may deviate from this. 12

15 Quad-Ring Seal dimensions in dependence on the American O-Ring standard AS 568 d 1 W W Figure 15 Quad-Ring Seal Table V TSS Part Numbers / Dimensions TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR

16 TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR

17 TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR

18 TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR

19 TSS Part No. Inside-Ø Cord Diameter d 1 ± W ± QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR QRAR Further sizes on request The specified tolerances for d 1 and W apply only to Quad-Ring Seals made from the material Nitrile Butadiene Elastomer NBR with a hardness of 70 Shore A. With other elastomer qualities and hardnesses, slight deviations from the values in the tables are possible due to the different shrinkage behaviour. Ordering Example Quad-Ring Seal No (in dependence on AS 568) dimensions: Insider diameter d 1 = mm Cord diameter W = 3.53 mm Material: NBR 70 (Nitrile Butadiene Elastomer, 70 Shore A) TSS Article No. QRAR N7004 TSS Series No. Quality Index (Standard) Compound No. (Standard) Quad-Ring Seal dimensions and TSS Part No., see Table V. Material No., see Table I. Installation dimensions, see Table IV. Orders detailing size and material are also possible. 17

20 Installation Recommendation Quad-Ring Seal with Back-up Ring for Radial-Dynamic Application (Reciprocating) - "External Sealing"- p p p p p r 1 d 4 d 3 b 1 b 2 b 3 Figure 16 Installation drawing The following data regarding Back-up Rings and groove widths b 2 and b 3 are exemplary. The use and the suitability of a Back-up Ring type as well as the design of the appropriate groove widths b 2 and b 3 should be verified and adapted regarding the application. For further information please refer to the O-Ring catalogue, chapter "Back-up Rings". Table VI TSS Part Numbers / Installation Dimensions Bore Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 4 H8 TSS Part No. dimensions TSS Part No. d 3 h9 b b b r 1 QRAR x1.78 BP QRAR x1.78 BP QRAR x1.78 BP QRAR4012A 8.20x1.78 BP QRAR x1.78 BP QRAR4111A 10.20x2.62 BP QRAR x2.62 BP QRAR x2.62 BP QRAR4114A 14.70x2.62 BP QRAR4115A 16.20x2.62 BP QRAR4210A 18.20x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D

21 Bore Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 4 H8 TSS Part No. dimensions TSS Part No. d 3 h9 b b b r QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x5.33 BP QRAR4326A 39.20x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K

22 Bore Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 4 H8 TSS Part No. dimensions TSS Part No. d 3 h9 b b b r QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K ) If a Back-up Ring is used the recommended radius should always be r1 = 0.25 ±0.2 mm. Further sizes on request! Materials for QUAD-Ring Seals, see Table I. 20

23 Installation Recommendation Quad-Ring Seal with Back-up Ring for Radial-Dynamic Application (Reciprocating) - "Internal Sealing" r 1 p p p p p d 5 d 6 b 1 b 2 b 3 Figure 17 Installation drawing The following data regarding Back-up Rings and groove widths b 2 and b 3 are exemplary. The use and the suitability of a Back-up Ring type as well as the design of the appropriate groove widths b 2 and b 3 should be verified and adapted regarding the application. For further information please refer to the O-Ring catalogue, chapter "Back-up Rings". Table VII TSS Part Numbers / Installation Dimensions Rod Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 5 f7 TSS Part No. dimensions TSS Part No. d 6 H9 b b b r 1 QRAR x1.78 BP QRAR x1.78 BP QRAR x1.78 BP QRAR4012A 8.20x1.78 BP QRAR4111A 10.20x2.62 BP QRAR x2.62 BP QRAR x2.62 BP QRAR4114A 14.70x2.62 BP QRAR4115A 16.20x2.62 BP QRAR4210A 18.20x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D QRAR x3.53 BP32D

24 Rod Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 5 f7 TSS Part No. dimensions TSS Part No. d 6 H9 b b b r QRAR x5.33 BP QRAR x5.33 BP QRAR4328A 45.20x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x5.33 BP QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR4439A x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K

25 Rod Quad-Ring Seal Back-up Ring, Spiral Groove-Ø Groove Width Radius 1) d 5 f7 TSS Part No. dimensions TSS Part No. d 6 H9 b b b r QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K QRAR x6.99 BP64K ) If a Back-up Ring is used the recommended radius should always be r1 = 0.25 ±0.2 mm. Further sizes on request! Materials for QUAD-Ring Seals, see Table I. 23

26 Installation Recommendation Quad-Ring Seal and Back-up Ring (Uncut) for Rotary Application - "Internal Sealing" - r 1 p p p p p d 5 d 6 b 1 b 2 b 3 Figure 18 Installation drawing The following data regarding Back-up Rings and groove widths b 2 and b 3 are exemplary. The use and the suitability of a Back-up Ring type as well as the design of the appropriate groove widths b 2 and b 3 should be verified and adapted regarding the application. For further information please refer to the O-Ring catalogue, chapter "Back-up Rings". Table VIII TSS Part Numbers / Installation Dimensions Rod Quad-Ring Seal Back-up Ring, Uncut Groove-Ø Groove Width Radius 1) d 5 f7 TSS Part No. dimensions TSS Part No. d 6 H8 b b b r 1 QRAR x1.78 BU16J QRAR x1.78 BU16J QRAR4012A 8.20x1.78 BU16J QRAR4111A 10.20x2.62 BU24J QRAR x2.62 BU24J QRAR x2.62 BU24J QRAR x2.62 BU24J QRAR x2.62 BU24J QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x3.53 BU33N QRAR x5.33 BU49R QRAR x5.33 BU49R

27 Rod Quad-Ring Seal Back-up Ring, Uncut Groove-Ø Groove Width Radius 1) d 5 f7 TSS Part No. dimensions TSS Part No. d 6 H8 b b b r QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R , QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x5.33 BU49R QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T QRAR x6.99 BU66T ) If a Back-up Ring is used the recommended radius should always be r 1 = 0,25 ±0,2 mm. Further sizes on request! Materials for Quad-Ring Seals, see Table I. Different procedures for the friction reduction of the elastomer surface are available when using Quad-Ring in a rotary application. Please refer to our brochure "Friction-free Running" or contact our specialists. 25

28 General Quality criteria The cost-effective use of seals and bearings is highly influenced by the quality criteria applied in production. Seals and bearings from Trelleborg Sealing Solutions are continuously monitored according to strict quality standards from material acquisition through to delivery. Certification of our production plants in accordance with international standards QS 9000 / ISO 9000 meets the specific requirements for quality control and management of purchasing, production and marketing functions. Our quality policy is consistently controlled by strict procedures and guidelines which are implemented within all strategic areas of the company. All testing of materials and products is performed in accordance with accepted test standards and specifications, e.g. random sample testing in accordance with ISO : AQL 1,0 general inspection level II, normal inspection. Inspection specifications correspond to standards applicable to individual product groups. Our sealing materials are produced free of chlorofluor inated hydrocarbons and carcinogenic elements. The tenth digit of our part number defines the quality characteristics of the part. A hyphen indicates compliance with standard quality criteria outlined in this catalogue. Customer-specific requirements are indicated by a different symbol in this position. Customers who require special quality criteria should contact their local Trelleborg Sealing Solutions sales office for assistance. We have experience in meeting all Customer quality requirements. Guidelines for the storage of polymer products based on ISO 2230 Many polymer products and components are stored for long periods of time before being put into service, so it is important they are stored in conditions that minimize unwanted changes in properties. Such changes may result from degradation, in which case they may include excessive hardening, softening, cracking, crazing and other surface effects. Other changes may be caused by deformation, contamination or mechanical damage. Packaging Unless otherwise specified in the appropriate product specification, rubber products should be enclosed in individual sealed envelopes. The packaging should be carried out in an atmosphere in which the relative humidity is less than 70%, or if polyurethanes are being packed, less than 65 %. Where there is serious risk of ingress of moisture (e.g. rubber-metal-bonded parts), aluminum foil/paper/polyethylene laminate or other similar means of protection should be used to ensure protection from ingress of moisture. Temperature The storage temperature should be below 25 C and the products should be stored away from direct sources of heat such as boilers, radiators and direct sunlight. If the storage temperature is below 15 C, care should be exercised during handling of stored products, as they may have stiffened and have become susceptible to distortion if not handled carefully. Humidity The relative humidity should be such that, given in the variations of temperature in storage, condensation does not occur. In all cases, the relative humidity of the atmosphere in storage should be less than 70%, or if polyurethanes are being stored, less than 65%. Light Rubber should be protected from light sources, in particular direct sunlight or intense light having a high ultra-violet content. It is advisable that any windows of storage rooms be covered with a red or orange coating or screen. Radiation Precautions should be taken to protect stored products from all sources of ionizing radiation likely to cause damage to the products. Ozone Ozone has a particularly harmful effect on rubber. Storage rooms should not contain any equipment that is capable of generating ozone, such as mercury vapor lamps or highvoltage electrical equipment giving rise to electric sparks or electrical discharges. Combustion gases and organic vapors should also be excluded, as they may give rise to ozone via photo-chemical processes. When equipment such as a fork-lift truck is used to handle large rubber products, care needs to be taken to ensure this equipment is not a source of pollution that may affect the rubber. Combustion gases should be considered separately. While they are responsible for generating ground-level ozone, they may also contain unburned fuel which, by condensing on rubber products, can cause additional deterioration. Deformation Rubber should be stored free from tension, compressive stresses or other causes of deformation. Where products are packaged in a strain-free condition, they should be stored in their original packaging. In case of doubt, the manufacturer's advice should be sought. It is advisable that rings of large internal diameter are formed into three equal loops so as to avoid creasing or twisting. It is not possible to achieve this condition by forming just two loops. Contact with liquids and semi-liquid materials Rubber should not be allowed to come into contact with liquid or semi-liquid materials (for example, petrol, greases, acids, disinfectants, cleaning fluids) or their vapors at any time during storage, unless these materials are by design an integral part of the product or the manufacturer's packaging. When rubber products are received coated with their operational media, they should be stored in this condition.. 26

29 Contact with metals Certain metals and their alloys (in particular, copper and manganese) are known to have harmful effects on some rubbers. Rubber should not be stored in contact with such metals except when bonded to them. They should be protected by wrapping in, or by separation with, a suitable material, e.g. paper or polyethylene. Contact with dusting powder Dusting powders should only be used for the packaging of rubber items in order to prevent adhesion. In such cases, the minimum quantity of powder to prevent adhesion should be used. Any powder used should be free from any constituent that would have a harmful effect on the rubber or the subsequent application of the rubber. Contact between different products Contact between products made from rubbers of different compositions should be avoided. This includes products of the same type but differing in color. Rubber-to-metal bonded products The metal part of rubber-to-metal bonded products should not come into contact with the rubber of other products. Preservative used on the metal should be of a type that it will not adversely affect the rubber or the bond to such an extent that it does not comply with the product specification. Storage life This is the maximum period of time that a rubber product, appropriately packaged, may be stored. After this time the product is regarded as unserviceable for the purposes for which it was originally manufactured. The storage life of a rubber product is influenced by its shape and size as well as its composition. Thick products usually undergo slower changes through degradation than thinner ones. Initial storage period This is the maximum period, starting from the time of manufacture, for which a rubber product, appropriately packaged, may be stored under specified conditions before a sample needs to be inspected or re-tested. Extension storage period This is the period for which a rubber product, appropriately packaged, may be stored after the initial storage period, before further inspection and re-testing is necessary. Table IX Initial and extension storage periods for unassembled components Material group Initial storage period Extension storage period AU, EU, NR, SBR 5 years 2 years ACM, AEM, CR, ECO, HNBR, IIR, NBR 7 years 3 years CSM, EPDM, FKM, FMQ, FVMQ 10 years 5 years FFKM e.g. Isolast 20 years 5 years Zurcon 10 years 5 years PTFE unlimited Note 1: If the storage temperature is over or under 25 C this will influence the storage time. Storage at 10 C higher will reduce the storage time by about 50%. Storage at 10 C lower will increase the storage time by around 100 %. Note 2: In application areas such as aerospace the storage periods can differ from this specification. These specific storage conditions have to be agreed between the supplier and the buyer. Assembly These are products or components containing more than one element, one or more of which is made of rubber. Generally it is not recommended to store elastomeric products in an assembled condition. If it is necessary to do so, the units should be checked more often. The inspection interval depends on the design and geometry of the components. Inspection before extension storage Before any items are to be stored for an extension period, representative samples of each type should be selected for inspection at the end of the appropriate initial storage period. Inspection should be in accordance with the relevant product specification. Visual inspection Inspect each of the items for the following: 1. Permanent distortions, such as creases or flats. 2. Mechanical damage, such as cuts, tears, abraded areas or delaminated plies. 3. Surface cracking when viewed under a microscope at x10 magnification. 4. Changes in surface condition, such as hardening, softening or tackiness. Assessment at the end of the initial period If, following the visual inspection procedure the items are not satisfactory, they should not be stored for an extended period. If the items are satisfactory and are stored for an extended period a record should be kept of the date initial storage began as well as the date the extended storage period began. Items stored for an extended period should be inspected and tested at, or before, the expiry of the extension storage period before they are put into service or stored for a further extended period. 27

30 Conversion Tables SI - Basic Units Measures Units Symbol Length Metre m Mass Kilogram kg Time Second s Electric current Ampere A Temperature Kelvin K Luminous intensity Candela cd Amount of substance Mol mol Length Torque inch foot yard mm metre 1 inch = foot = yard = mm = metre = ,000 inchounce inchpound footpound kgmetre Newtonmetre 1 inch-ounce = x x inch-pound = x foot-pound = kg-metre = 1, Newton-metre = Area inch 2 foot 2 yard 2 mm 2 m 2 1 inch 2 = x foot 2 = , yard 2 = 1, , mm 2 = x x m 2 = 1, Volume inch 3 US quart imp. gallon foot 3 US gallon liter 1 inch3 = US quart = imp. gallon = foot 3 = 1, US gallon = liter = Temperature K (Kelvin) C F K = C ( F ) 5/9 C = K ( F - 32) 5/9 F = K 9/ C 9/ Density ounce/inch 3 pound/ foot 3 g/cm 3 1 ounce/inch 3 = pound/foot 3 = g/cm 3 = Force Newton (N) kilopond (kp) pound force 1 Newton (N) = kilopond (kp) = pound force = Velocity (Speed) foot/s foot/ min mile/ hour metre/s km/ hour 1 foot/s = ft/min = mile/hour = metre/s = km/h = Mass Pressure ounce pound kg 1 ounce = pound = kg = inch Hg psi atmosphere torr mm Hg bar MPa kg/cm 2 1 inch Hg = psi = atmosphere = torr = mm Hg = bar = MPa = kg/cm 2 =

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32 Trelleborg is a world leader in engineered polymer solutions that seal, damp and protect critical applications in demanding environments. Its innovative engineered solutions accelerate performance for customers in a sustainable way. The Trelleborg Group has local presence in over 40 countries around the world. facebook.com/trelleborgsealingsolutions twitter.com/trelleborgseals youtube.com/trelleborgseals flickr.com/trelleborgsealingsolutions 2015 Trelleborg Group. At time of publication the information contained in this literature is believed to be correct and accurate. 99GBQRCATAE0515