??Rubber seals seal the merits of conditions

??Qualified products should meet the following conditions:

??1, the end face of the code identifies the need to conform

??2, smooth surface, no defects, no distortion.

??3, with the skeleton rubber seal seal shape upright, circular end faces, put on the glass surface should be bonded to the glass plate, no flexing phenomenon.

??4, no oil seal outer edge should be correct, end formation, with the deformed hand, let go can be restored to its original shape.

??5, over the entire circumference edge shape, thickness should be consistent, when the same test equipment fittings, cutting edge in supporting the neck should be tight fitting.

??6, the rubber seal with spring, spring should be no rust, no distortion, and can be more firmly stuck in the spring slot. 50 * 72 * 12 rubber seals for example. Seal the floor from a height of 1m so that freedom, if 5 per drop spring fall off no more than one time, you can think with a good spring and the seal.

??7, when the distributor bulk purchase rubber seal, can be done in oil samples taken for testing, measuring its rate of mass change. For example, after the 25th seal with transformer oil at a temperature of (70 ± 5) degrees soak 24h, the quality of the rate of change should be between 3% -5%.