PU polyurethane sealing ring Polyurethane mechanical properties are very good, wear resistance to high pressure performance is far better than rubber, aging resistance, ozone resistance oil resistance is very good, PU polyurethane sealing ring disadvantage high temperature easy hydrolysis, generally used for high pressure wear resistance sealing link PU polyurethane sealing ring is widely used in the hydraulic industry, the general use temperature range before -45℃/+90℃
Tianzhan rubber seals have good wear resistance and elastic tensile strength, but they are easy to age in air, soften in heat, alkali resistant but not resistant to strong acid, easy to expand and dissolve in mineral oil or gasoline, and excellent shock absorption performance. Rubber seals are widely used in shock absorber materials, in addition to commonly used in food and beverage, direct contact seals and non-hydraulic system seals, generally used in the temperature range between -20℃/+100℃.