R ≦ 0.3

油缸内表面应作0.4~3.2 μ mRmax (0.1~0.8 μ mRa)的研磨或抛光

D-8 piston seals used only for special pistons, choose the size in inches.

Properties
• Material: TPU, (D-8): TPU + PA
• Specific gravity (ASTM D792): 1.20
• hardness (ASTM D2240): 95
• Tensile strength (ASTM D412): 317
• 100% modulus (ASTM D412): 110
• 300% modulus (ASTM D412): 170
• 70 小时 / 70ºC under compression deformation rate (ASTM D395B): 34
• 70 小时 / 100ºC under compression deformation rate (ASTM D395B): 56

Working conditions
• Maximum operating pressure: 40 Mpa
• Operating speed: 0.03 ~ 0.5 m / sec
• Operating Temperature: -20ºC ~ 100ºC

Oil resistance
• Test oil: wear hydraulic oil 46 #
• Test temperature (ºC): 100
• Test Time (hours): 100
• change in hardness (Shore A): -1
• Tensile Strength Change (%): -4
• Volume change (%): +0.08