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Color – dark red

XH-Pur is a hydrolysis resistant hard grade thermoplastic polyurethane elastomer (TPU). This material is the further development and modernising of popular material H-Pur, it still perfectly works in hot water (natural and sea) based, flame retardant hydraulic fluids (HFA, HFB), biologically degradable fluids (bio-oils), mineral oils, but has much bigger hardness, therefore it can be used in heavier conditions.

High hardness of a material promotes its excellent stability to extrusion

XH-Pur is highly resistant to ozone, weather impact and temperatures. As well as H-Pur, this material is very recommended for usage in tropical regions. Swelling in mineral oils is low. XH-Pur has the same high resistance to radiation exposure and gas permeability as H-Pur. 

Resistance

Good resistance Average resistance Low resistance
Hydraulic fluids based on mineral oil Fire-resistant fluids of type HFC (water glycol mixture) Aromatic hydrocarbons
Biologically degradable hydraulic fluids Some additives for power can have destructive effect (e.g. fungicides) Chlorinated hydrocarbons (dichloromethane, trichloromethane)
Fire-resistant pressure fluids HFA and HFB Ethanol Ketones and glycols
Mineral oils and grease (certain additives can have destructive effects) Non-ethanol fuels (except premium blend petrol and unleaded fuels) Break fluids, based on glycol
Silicone oils and grease Hot steam exceeding +100°С
Aliphatic hydrocarbons (e.g. propane, butane) Concentrated acids and basis
Hot water and sea water up to +90°С
Diluted acids and basis

Application

XH-Pur is used as alternative to material PTFE in the combined sealing systems, consisting of two elements - a sliding ring (PTFE) and elastic O-Ring (NBR). The sliding ring out of XH-Pur, unlike PTFE, can be installed easily and quickly without application of special instruments and techniques.

XH-Pur with heightened hardness has excellent extrusion stability and can be used as a material for the seals fixed in strongly worn out gears and at very high pressure

Mainly used

  • Wipers
  • Piston seals
  • Rod seals
  • O-Rings
  • Rotor seals

XH-Pur Material Data Sheet

Properties Value Unit Standard
Hardness 57+/-2 Sh D DIN 53505
Density 1,2 g/cm3 DIN 53479 or DIN EN ISO 1183-1
Compression set 70°C / 70 h, 20 % deformation 25 % DIN 53517 or DIN ISO 815-1
Compression set 100°C / 24 h, 20 % deformation 30 % DIN 53517 or DIN ISO 815-1
100 % modulus 23 N/mm2 DIN 53504
Tensile strength ≥45 N/mm2 DIN 53504
Elongation at break ≥300 % DIN 53504
Tear strength ≥100 N/mm DIN 53515 or DIN ISO 34-1
Abrasion 18 mm3 DIN 53516
Min. service temperature -20 °C  
Max. service temperature +110 °C

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

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