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Color – grey

SH-Pur is a hydrolysis resistant thermoplastic polyurethane elastomer (TPU). This material is the further development and modernising of 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., etc. SH-Pur is modified by introduction of special combinations of grease lubricants, therefore the seals made out of this material, can ensure much easier sliding with extremely low coefficient of friction and insignificant heat.

SH-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. SH-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

SH-Pur is used as alternative to material «Domestic» (NBR+fabric) in the combined sealing «shevron» systems, consisting of several elements. Besides, material SH-Pur - with the lowered coefficient of friction, ensures easier movement and total absence of effect «stick-sleep» that is important for smooth operation of the gear, without microstoppings and jumps.

SH-Pur can be used as a material for seals of different profiles, for example, in water plunger pumps as a «shevron systems» and in reducers-machines, as a rotor seal of shaft for high speeds of rotation.

Mainly used

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

SH-Pur Material Data Sheet

Properties Value Unit Standard
Hardness 95+/-3 Sh A DIN 53505
Hardness 48+/-3 Sh D DIN 53505
Density 1,22 g/cm3 DIN 53479 or DIN EN ISO 1183-1
Compression set 70°C / 70 h, 10 % deformation 22 % DIN 53517 or DIN ISO 815-1
Compression set 100°C / 24 h, 20 % deformation 28 % DIN 53517 or DIN ISO 815-1
100 % modulus ≥16 N/mm2 DIN 53504
Tensile strength ≥46 N/mm2 DIN 53504
Elongation at break ≥400 % DIN 53504
Tear strength 110 N/mm DIN 53515 or DIN ISO 34-1
Abrasion 20 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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