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TECHNICAL CATALOGUE-ENGLISH - 324 Pages

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Catalogue excerpts

All information contained in our catalogue is released only for general usage and not valid for special applications. Given parameters such as maximum pressure, temperature, sliding speed, surface contact pressure and media are determined in laboratory conditions. In case the operating parameters are requested at maximum level, these values may not be achieved. Design-based system failures arising from our customers do not relate to Kastaº Kauçuk A.ª.. In no event will Kastaº Kauçuk A.ª. be liable for any loss, damage, claim or expense directly or indirectly due to such defects. For the best recommendation...

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Hydraulic and Pneumat i c S e a l s TECHNICAL CATALOGUE

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INTRODUCTION 3 SEAL PROGRAMME 5 TECHNICAL INFORMATION Elastomers 12 Thermoplastics 13 Thermoplastic Elastomers 13 Material Characteristics 13 Storage of Sealing Elements 14 General Installation Information 14 Units, Quantities and General Tolerances 15 HYDRAULIC SEALING ELEMENTS Working Principle of Sealing Elements 18 Choosing Sealing Elements 18 Surface Roughness 20 System Tolerances and Designs 22 Permissble Sealing Gap 24 General Installation Information 25 Sample Designs 28 HYDRAULIC PISTON-ROD SEALING ELEMENTS Product Programme 33 K21- Piston - Rod Seal 34 K36- Piston - Rod Seal 48 K95-...

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DRAWING APPLICATION MATERIAL CODE TEMPERATURE (max) oC SLIDING SPEED (max) - m/sec PAGE KASTAS CODE PRODUCT NAME SEAL PROGRAMME 5 PRESSURE (max) bar KO O-Ring Rod NBR NB7001 63 -30/+105 0.5 Piston KX X-Ring Rod NBR NB7001 50 -30/+105 0.5 Piston K01 Rod Rod NBR NB9001 400 -30/+105 0.5 Packing FABRIC NBR NB8008 POM PM9903 K03 Piston Piston FABRIC NBR NB8008 400 -30/+105 0.5 Packing POM PM9903 K04 Rod Rod NBR NB9001 400 -30/+105 0.5 Packing FABRIC NBR NB8008 POM PM9903 K05 Wiper Rod PU PU9501 -30/+100 1.0 K06 Wiper Rod NBR NB9001 -30/+105 1.0 PU PU9201 -30/+100 1.0 K07 Metal Case Rod NBR NB9001 -30/+105...

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SEAL PROGRAMME 8 K55 Pneumatic Piston NBR NB7001 12 -30/+105 1.0 Piston ALUMINUM AL9901 Seal K56 Pneumatic Rod NBR NB8001 16 -30/+105 1.0 Rod Seal TPE TP5501 K57 Pneumatic Piston NBR NB7001 12 -30/+105 1.0 Piston Seal ALUMINUM AL9901 K58 Pneumatic Piston PU PU9201 12 -30/+80 1.0 Piston POM PM9901 Seal ALUMINUM AL9901 MAGNET MK9901 NBR NB7001 K59 Pneumatic Piston NBR NB8001 12 -30/+105 1.0 Piston PU PU8001 16 -30/+80 1.0 Seal K62 Pneumatic Piston NBR NB7001 12 -30/+105 1.0 Piston Seal K63 Pneumatic Piston NBR NB7001 12 -30/+105 1.0 Piston Seal K68 Rod Rod POM PM9902 -30/+125 1.0 Guide Ring K69...

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SEAL PROGRAMME 9 K95 Piston Piston NBR NB9001 150 -30/+105 0.5 Rod Seal Rod K96 Rod Seal Rod NBR NB9001 150 -30/+105 0.5 K150 Chevron Rod FABRIC NBR NB8503 250 -30/+80 2.0 Ring K151 High Rod FABRIC NBR NB8503 250 -30/+80 2.0 Pressure POM PM9901 Chevron PTFE PT6002 Seal K152/ Low Rod FABRIC NBR NB8503 80 -30/+80 2.0 K153 Pressure POM PM9901 Chevron Seal K701 Spring Rod PTFE PT6002 350 -150/+250 15.0 Loaded V-SPRING CN9902 Rod Seal K702 Rod Seal Rod NBR NB7001 300 -30/+105 5.0 for Rotating PTFE PT6003 Peripheral Application K703 Wiper Rod NBR NB7001 -30/+105 5.0 PTFE PT6003 K751 Spring Piston PTFE...

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TECHNICAL INFORMATION

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It is been recommended for the most part of the sealing elements applications and it has a very common use. Nitrile (NBR) is a Butadiene-Acrylo Nitrile (ACN) polymer. At Kastaº the percentage of Acrylo nitrile in the nitrile compound varies between 30% and 50%. The variation in the percentage of ACN changes the volume, gas permeability, elasticity and compression set of the compound used in mineral oils, grease and fuel. Nitrile is very durable against aliphatic hydrocarbons (i.e. propane, butane, petroleum, etc), mineral oils (lubricants, H, HL, HLP type of hydraulic oils), greases, HFA, HFB,...

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13 THERMOPLASTICS This material is known as Teflon, the trademark of DUPONT Company. PTFE material does have the lowest coefficient of friction. Due to the low friction coefficient and high wear resistance, it performs well on poorly lubricating conditions as well as high sliding speeds. PTFE can be used in temperatures between -200¢ªC to +260¢ªC. It has very good resistance to all chemicals except alkaline metals, high pressure-temperature chlorotriflour and basic flourines. Hardness and elasticity make the material to be used widely in hydraulic applications. Depending onto the application;...

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UNIT, QUANTITY AND GENERAL TOLERANCES QUANTITY UNITS OFFICIAL UNITS ALSO USED Angular momentum N . m . s Torque Nm Revoluti ons per minute 2 . x . rad / s Modulus of elastici ty Pa N / mm2, bar Enthalp y J Kj Specific enth alpy J / kg kJ / kg Entropy J / K kJ / K Specific entro py J / kg . K kJ / kg . K Geometrical moment of inertia m4 cm4 Force N kN, MN Gas consta nt J / kg . K kJ / kg . K Calorific v alue J / kg, J / m3 kJ / kg, kJ / m3 Momentum N . s Mass moment o f inertia kg . m g . m, t . m2 Moment N . m Unit conductan ce W / m . K4 Volume spe cific m3 / kg Coefficient of hea t transfer...

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HYDRAULIC SEALING ELEMENTS

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Hydraulic cylinders are being used in mechanical applications where reciprocating forces and movements are needed. Sealing element is one of the most important parts of the cylinders. The sealing elements are being installed into the respective groove with a preload. Figure 1 shows the sealing element in free state, preload after the assembly of the seal and the free space needed in the housing. The sealing element is able to work in low pressures due to this preload. Figure 2 shows the pressurized media filling into the groove and sealing element is expanded with this pressure. Sealing elements...

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19 The minimum and maximum operating temperature of the sealing elements do change with the media they are being used in. Sealing elements can be used in mineral oils (DIN 51524), non flammable hydraulic oils (VDMA 24317 or DIN 24320), atmosphere, water and different type of media (See section; Chemical Resistance of Rubber Materials). Table 1 shows the most common media used with the sealing elements. The viscosity of the media is one of the reasons of wear in the sealing elements. Pressure and temperature change the viscosity of the media. The viscosity of the media increases with the pressure....

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