A gasket is made of paper, rubber or copper, placed between the two planes to strengthen the sealing material, to prevent fluid leakage between the sealing elements of the cover.

Gaskets are mechanical seals between two objects. They are usually used to prevent pressure and corrosion between two objects, and naturally expand and shrink in the pipeline. Because machined surfaces can not be perfect, the use of gaskets can fill the irregularity. Gaskets are usually made of sheet material, such as pads, rubber, silicone rubber, metal, cork, felt, chloroprene rubber, NBR, glass fiber or plastic polymers (such as polytetrafluoroethylene). Asbestos may contain asbestos for specific applied gaskets.

A gasket is a leak (usually in the middle) of a thin plate (usually in the middle), usually used for the distribution of load thread fasteners. Other uses are spacers, springs (Baer vill gaskets, wave gaskets), wear resistant pads, pre display devices, locking devices. Rubber gaskets are also used in faucets (valves) to cut off flowing liquids or gases. Rubber or silicon gaskets can also be used to reduce fan vibration. Usually the outer diameter of the gasket is about two times the diameter of the inner diameter.

Gaskets can be classified into non-metallic gaskets, metal gaskets and metal nonmetallic gaskets according to their material and structural characteristics, and they can be subdivided into several types.
Nonmetal gasket
Rubber gasket
Asbestos free fiber rubber gasket
Flexible graphite metal composite gasket
PTFE gasket
Polytetrafluoroethylene coated gasket
Other types of nonmetallic gaskets

Metal nonmetal composite gasket
Waveform gasket
Metal winding gasket
Metal toothed composite gasket
Metal wave tooth composite gasket
Other types of metal composite gaskets

Metal gasket:
Metal flat gasket
Corrugated metal gasket
Metal toothed gasket
Metal ring gasket
Metal lens gasket
Metal O ring pad

The metal annular gasket can be divided into
Octagonal ring pad
Oval ring pad
RX and BX self tight seal ring pad

The gasket washer pad between the connector and nut is usually a flat metal ring.
Non metallic gaskets non-metallic gasket are made of gaskets made of asbestos, rubber, synthetic resin, polytetrafluoroethylene, etc.
A non-metallic gasket non-metallic jacket gasket is coated with a non-metallic gasket, such as synthetic resin.
Semi metal gaskets semimetallic gasket gaskets made of metal and non-metallic materials, such as wound gaskets and metal gaskets. A spiral wound gasket spiral wound gasket consists of gaskets made of spiral belt wrapped by metal belt of V or W section.
1) inner ring inner ring is installed in the inner ring of the winding gasket metal ring.
2) outer ring outer ring is mounted on the metal ring of the outer ring of the wound gasket. B metal coating
Metal gaskets metallic gasket are gaskets made of steel, aluminum, copper, nickel or Monel alloy.
Winding gasket is a gasket with metal band (generally V type steel strip) and non-metallic belt twisted into ring. It is intertwined alternately with non-metallic belt. Because of its good elasticity, it is widely used in the flange seal structure of petrochemical, chemical, electric and other industries. The inner layer or outer layer of the gasket can be added to the steel ring according to the specific position. Position or strengthen.