Color - red
H-Pur is a hydrolysis resistant thermoplastic polyurethane elastomer (TPU). This material is the further development and modernising of material Pur, but it perfectly works in hot water (natural and sea, temp. up to +90°С) based, flame retardant hydraulic fluids (HFA, HFB), biologically degradable fluids (bio-oils), mineral oils (water content – more than 0.2%), etc.
H-Pur is highly resistant to ozone, weather impact and temperatures. This material is very recommended for usage in tropical regions. Swelling in mineral oils is low. H-Pur has the same high resistance to radiation exposure as the Pur. The gas permeability of H-Pur is much lower than of the Pur.
Due to its’ hydrolysis resistance, H-Pur can be used in water hydraulics and mining, tunneling, production of presses. H-Pur is especially recommended for usage in natural and sea water, for HFA and HFB liquids and biologically degradable fluids for hydraulic systems (vegetable oil and synthetic esters) and nutritional components.
In comparison with Pur, H-Pur has about the same mechanical properties and wear resistance. Breaking strain is very low (20% at 70°С/70h). The temperature rate: from -20°С up to +115°С.
The main difference between H-Pur and Pur, is a very high hydrolysis and chemical resistance of H-Pur, which is very unusual for polyurethanes.
Good resistance – Hydraulic fluids based on mineral oil
H-Pur is mainly used in those cases where among with the high resistance to mineral oils, hydrolysis and chemical resistance are required.
Operating practice of different seals shows that H-Pur has better wear resistance than the rubber elastomers (standard molding to a press-form) more than 8-15 times.
H-Pur has high hardness, so it has been used successfully for the seals, which are operated in a highly worn pairings at high pressure and must have a high resistance to extrusion.
There is a Certificate confirming H-Pur to be intended as a sealing material for the use in food processing machinery is in full compliance with FDA regulations.
Wipers
Piston seals
Rod seals
O-Rings
Rotor seals