Urethane O-Ring (Polyurethane – PU, AU, EU) Material Description
The millable Polyurethane (PU) rubbers are distinguished into two types; the first is polyester urethane (AU) and the other is polyether urethane (EU). AU type urethanes have outstanding oil, fuel and solvent resistance but can be attacked by hydrolysis. EU type urethanes are not attacked by hydrolysis and still offer a fuel and oil resistance comparable to low ACN (18 to 22% ACN) Nitriles or HNBRs.
Any type polyurethane has excellent wear resistance, high tensile strength and high elasticity in comparison with any other elastomers. Global O-Ring and Seal offers urethane o-rings in 70 and 90 durometer. We can also offer any type thermoplastic urethane (TPU).
Urethane o-rings are typically transparent (clear) in color, and have an unlimited shelf life.
Cure System: Peroxide-Cured
Standard polyurethane compounds are peroxide-cured.
Urethane O-Ring Temperature Range:
Standard Low Temp: -40°C (-40°F)
Standard High Temp: 80°C (176°F)
SPEC SHEET: Urethane 70 Durometer
SPEC SHEET: Urethane 90 Durometer
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使用氨基甲酸乙酯O型圈的首选环境
Performs Well In:
- 脂肪烃
- 矿物油和油脂
- 硅油和油脂
- 臭氧
- 最高温度为50ºC(122ºF)欧盟标准的水
Doesn't Perform Well In:
- 酮类
- 酒类
- 酯类
- 醚类
- 热水和蒸汽
- 碱,胺
- 酸类
- 乙二醇