Seal is divided into dynamic seal and static seal, static seal is divided into: gasket seal, rubber seal, and touch seal three categories.Dynamic seal can be divided into two types: rotary seal and reciprocating seal.The sealing methods are divided into two categories: static sealing and dynamic sealing between relative contact surfaces.
1. Static seal: According to the operating pressure, the static seal can be divided into medium and low pressure static seal and high pressure static seal.Medium and low pressure static seal commonly used raw materials are soft, gasket wider gasket seal, high pressure static seal with data more hard, touch the width of the metal gasket is very narrow.
2. Dynamic seal: press the seal and its relative movement of zero is not touch, can be divided into touch type seal and non-touch type seal.
Generally speaking, the seal sealing good touch, but by conflict, wear constraints, suitable for the occasion of lower sealing line.In the touch seal by the seal touch azimuth can be divided into circumference (radial) seal and end face seal.End seal is also called mechanical seal.Non - touch seal, because the sealing surface is not straight touch, small starting power, long life.