Import O-ring

O-ring assembly deformation import compression pressure level and pressure on 1 / O-rings of different sizes by the O-ring initial deformation degree and O-ring material hardness different decision. 2 / tension and compression are two forms of O-ring in the groove installation. In the radial seal, O-ring mounted in the inner groove (as "Cylindrical seal"), O-ring must be stretched, and the groove is larger than the outer diameter of the inner diameter stretch. In the state of installation, the maximum elongation of the O-ring should be 3% (inner diameter> 50mm), or 5%. 3 / when the outer O-ring fitted in a groove (a "seal within circle"), O-ring is compressed in the circumferential direction of the circumference. In state after installation, the maximum circumference of the amount of compression is 1%. If more than the amount of tension or compression will cause an excessive increase or decrease the cross-sectional size of the O-ring, which affects the working life of the O-ring. O-ring occurs in the axial deformation under pressure, O-ring will produce radial peristalsis, so pay attention to the direction of pressure on the O-ring. 4 / When the pressure from the inside, the outer diameter of the O-ring should be in contact with the outer diameter of the trench (by less than 1% of its perimeter). 5 / If the pressure from the outside, the inner diameter of the O-ring should be in contact with the inner diameter of the trench, the maximum allowable tensile 3%.