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Seal Material Compounds
H-PU: Thermoplastic Polyurethane
Higher performance polyurethane
Extremely good abrasion and extrusion resistant seal material
Easy fitting due to high elasticity properties
Excellent Hydrolysis resistance
Hardness : 95 Shore A
Temperature Range : -30c to 110c
Application : Standard hydraulic applications up to 400 bar
Colour : Red
Resistant to:
mineral oils, mineral fats (certain additives can have a destroying influence), hydraulic fluids on mineral oil basis, silicone oils and silicone greases, biologically degradable hydraulic fluids, aliphatic hydrocarbons (e.g. propane, butane, gasoline), inflammable hydraulic fluids from the HFA and HFB group, sea water and hot water up to +90°C, diluted acids and caustic solutions.
Not resistant to:
concentrated, aromatic hydrocarbons (e.g. benzene, toluol), ketones and glycols, brake fluids on glycol base, hydrocarbons (e.g. dichloromethane, trichlorethylene), hot steam over +100°C, amines, alkalis.
Download: HPU datasheet
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Seal material particularly resistant to abrasion and extrusion. Very flexible. Excellent resistance to hydrolysis in the most usual hydraulic fluids and "oil in water" emulsions.
Hardness: 55 +/- 3 shore D
Temperature Range: -20/ +115 °C
Application: Standard hydraulic conditions: up to 550 bar
Colour : Yellow
Download: PU55D datasheet
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NBR: Nitrile Butadiene Rubber
Abrasion resistant seal material.
High elasticity means easy installation.
Material is supplied with hard coating for easy machining
Hardness : 85 Shore A
Temperature Range : -35c to 100c
Application : Standard hydraulic and pneumatic applications up to 250 bar
Colour : Black
Resistant to:
liquids of low flammability HFA, HFB, HFC, with at least 40% water, water (special mixtures to +100°C), aliphatic hydrocarbons such as propane, butane, gasoline, mineral oils and fats, Diesel fuels as well as fuel oil, rapeseel oils, polyalkylene glycol, many synthetic esters (environmental compatible hydrocarbons), many diluted acids, bases, salt solutions, at low temperature.
Not resistant to:
Ozone influence, aging and weather, brake fluids on glycol base (ATE blue, DOT 4, Pentosin), aromatic hydrocarbons such as benzene, hydrocarbons such as trichlorethylene, liquids of low flammability HFD, polar solvents such as ketone, acetone, acetic acid ethylen ester.
Download: NBR datasheet
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H-NBR: Hydrogenated Acrylnitrile Butadiene Rubber
Abrasion resistant seal material.
High elasticity means easy installation.
Material is supplied with hard coating for easy machining
Hardness : 85 Shore A
Temperature Range : -20c to 150c
Application : Standard hydraulic and pneumatic applications up to 250 bar
Colour : Green
Resistant to:
crude oils that contain hydrogen sulphide and amines, alloyed oils as well as radiator liquids and corrosion-preventing substances.
Download: H-NBR datasheet
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Viton: Fluorine Rubber (FPM)
Abrasion resistant to heat and chemicals.
High elasticity means easy installation.
Material is supplied with hard coating for easy machining
Hardness : 85 Shore A
Temperature Range : -20c to 200c
Application : Standard hydraulic and pneumatic applications up to 250 bar
Colour : Brown
Resistant to:
Silicone oils and fats, synthetic aircraft engine oils, mineral oil and mineral fats, very good resistance to ozone, aging and weather, solvents such as trichloroethylene and by, acids and bases (at low temperatures).
Not resistant to:
aromatic mineral oils
Download: Viton datasheet
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EPDM: Ethylene Propylene Diene Rubber
Highly resistant to weathering, ozone and ageing.
Not resistant to mineral oils.
High elasticity means easy installation .
Material is supplied with hard coating for easy machining
Hardness : 85 Shore A
Temperature Range: -40c tp 150c
Application : Hot Water, Steam, Caustics and Diluted Acids
Peroxide cured suitable for brake fluid
Colour : Black
Resistant to:
Silicone oils and fats, ozone, aging, influences of the weather, brake fluids on glycol base up to +150°C, hot water and hot water steam, hydraulic fluids and phosphoric acid ester basis (Hfdr).
Not resistant to:
Petroleum products
Download: EPDM datasheet
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Silicon: Methyl Vinil Silicon Rubber (MVQ)
Highly resistant to weathering, ozone and aging.
High electrical insulation properties.
High elasticity means easy installation.
Material is supplied with hard coating for easy machining
Hardness : 85 Shore A
Temperature Range: -60c tp 220c
Application : Standard hydraulic and pneumatic applications up to 250 bar
Colour : Blue
Resistant to:
Water up to approx. +100°C, brake fluids on glycol base, diluted hydrochloric acids, hydraulic fluids of low flammability (HFD and HFD-S), high-molecular chlorinated aromatic hydrocarbons, animal and vegetable oils and fats, to ozone , aging and weather influences, to engine and transmission oils of aliphatic kind.
Not resistant to:
Silicone oils and silicone greases, fuels, water vapour over +120°C, acids and alkalis, aromatic hydrocarbons, low-molecular chlorinated hydrocarbons.
Download: Silicon datasheet
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TFV: PTFE Virgin
Excellent chemical resistance.
Low frictional properties.
Can be used in contact with food
Temperature Range : -200c tp 260c
Application : Back up rings, glide rings, wear bands and seals
Colour : White
Resistant to:
hydraulic fluids, aggressive media such as alkalis, almost all acids and caustic solutions, not inflammable, also resistant to influences of the weather and aging. It does not show any sticking characteristics.
Download: TFV datasheet
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TMB: PTFE + Glass, Bronze, MoS@
Excellent chemical resistance.
Low frictional properties.
Extremely good extrusion resistance
Temperature Range : -200c tp 260c
Application : Glide rings, wear bands and seals
Colour : Grey
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POM: Polyoxymethelene
(Acetal)
High pressure and extrusion strength.
Low moisture absorption.
Excellent machining properties
Temperature Range : -40c to 100c
Application : Wear bands, back up rings and bushes
Colour : White
Resistant to:
Water, alcohols, aliphatic and aromatic hydrocarbons, mineral oils and fats, fuels, weak acids and caustic solutions, vegetable and animal fats and oils.
Not resistant to:
strong acids and caustic solutions
Download: POM datasheet
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PA: Polyamide
(Nylon)
High pressure and extrusion strength.
Low moisture absorption than most PA€™s.
Special grade for seal manufacturing
Temperature Range : -40c to 100c
Application : Wear bands, back up rings and bushes
Colour : Black
Resistant to:
Alcohols, aliphatic and aromatic hydrocarbons, mineral oils and fat, fuels, weak caustic solutions, vegetable and animal fats and oils, ester, ketones.
Not resistant to:
strong acids and caustic solutions
Download: PA datasheet
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Other special materials available on request:
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