Imported rubber O-ring imported rubber O-ring Common Application: rubber O-ring for installation on a variety of machinery and equipment, at a specified temperature, pressure, and various liquid and gaseous media, in stationary or play sports state seal. In the bathroom, marine, automotive, hardware, electronics, toys, electronics, aerospace equipment, machinery, and a variety of instruments, large-scale application of various types of sealing elements. Rubber O-ring is mainly used for static seals and reciprocating seals. For rotational movement of the seal when limited to low-speed rotary sealing device. Rubber O-ring is usually installed on the outer or inner circle from the seal section is rectangular trench. Rubber O-ring in the oil, acid, wear, erosion and other environmental chemistry still play a good sealing, damping effect. Therefore, the rubber O-ring hydraulic and pneumatic drive system most widely used a seal. Taiwan's imports in the selection of the O-ring when the hardness of how to choose: the hardness of the rubber O-ring choice is more important. If a pump-turbine power station hardness of 70 (Shore) seals, often flaking, even transection, after using 85 ~ 90 (Shore) seal, the desired effect. Low hardness, easy to install, but prone to peeling, installation damage, extrusion or pressure explosion. Hardness too inconvenient to install. Usually a rubber O-ring hardness 40 ~ 90 IRHD, but in general the use of 70 IRHD is more appropriate for the silicone rubber is the exception, the general use of 60 IRHD. Rubber O-ring hardness / diameter / gap relationship diameter tolerances / working pressure between / gap tolerances / pressure (kg / c㎡) hardness SHOREA 35 Kg / C㎡ 70 Kg / C㎡ 105 Kg / 140 Kg C㎡ / C㎡ 175 Kg / C㎡ 210 Kg / C㎡ 350 Kg / C㎡ 1.78 70 0.15 0.10????? 80 0.20 0.15 0.10 0.05 0.03?? 90 0.25 0.20 0.13 0.10 0.08 0.05 0.03 2.62 70 0.18 0.13 0.08?? ?? 80 0.25 0.18 0.13 0.08 0.04 90 0.3 0.25 0.18 0.13 0.10 0.08 0.04 OTP- Taiwan Volta top seal for the purification of Taiwan's imports of finished rubber O-rings:?? uncured rubber O-ring material imported under high temperature and pressure for viscous fluid, and to the vulcanization molding stage, plastic materials quickly fill the cavity, the excess part of (in order to prevent the lack of plastic, fill in the cavity of the plastic material, sure to maintain a certain excess) overflow cure, they formed the excess glue (also known as scrap, flash). Overflow edge, once formed, to make the appearance neat and beautiful, must be removed, this process often called trimming. For trimming the size requirement is accurate, neat appearance. In the actual production. Trimming products are often time-consuming, consuming work, strict requirements for the product.