Core Tip: The bearing has a dust cover and a sealing ring. The two properties are different. One is dustproof and the other is sealed. Dust prevention prevents dust from entering the inside of the motor; the seal not only does not allow external dust to enter, but also internal grease does not easily flow out.
Unclean grease on the outside is also not easy to flow in. In practice, there are differences between the two, not too big. Bearings generally have inner and outer oil caps that have already played this role and are only required under certain conditions. The dustproof is indicated by Z, and the seal is indicated by S (the felt seal is indicated by FS; the rubber seal is indicated by LS). In the two explanations, the bearing manufacturer with the dust cover (including the seal) has grease added inside, and the grease-free cover must be greased.
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Label: difference between bearing with dust cover and bearing with sealing ring
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What does angle valve do?
An angle valve has an inlet and an outlet port which are perpendicular to each other. It is sorted as the manual valves and it is usually used to prevent or control the flow of a liquid in a pipe and this is the reason for it is sometimes called simply as stop valve.
What type of valve is an angle valve?
Also called compression valves, angle stop valves are the emergency shutoff valves located under each water-using appliance and fixture in your home.
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