What is a gasket？

Gasket is a mechanical seal between two objects, and is usually used to prevent pressure, corrosion, and natural expansion and contraction of pipelines from leakage between the two objects. Since the machined surface cannot be perfect, the irregularities can be filled with gaskets. Gaskets are usually made of sheet materials, such as paper backing, rubber, silicone rubber, metal, cork, felt, neoprene, nitrile rubber, glass fiber or plastic polymers (such as polytetrafluoroethylene). Gaskets for certain applications may contain asbestos.

A washer is a hole (usually in the middle) of a thin plate (usually round), usually a load thread fastener for distribution. Other uses are as spacers, springs (Belleville gaskets, wave gaskets), wear pads, pre-display devices, lock devices. Rubber gaskets are also used in faucets (valves) to cut off the flow of liquid or gas. Rubber or silicon gaskets can also be used to reduce fan vibration. Usually the outer diameter of the gasket is about twice the inner diameter.

What are the types of gaskets?

Gaskets can be divided into non-metallic gaskets, metal gaskets, and metal-non-metal composite gaskets according to their materials and structural characteristics. Each type can be subdivided into several types.

Non-metallic gasket:

Rubber gasket

Non-asbestos fiber rubber gasket

Flexible graphite metal composite gasket

PTFE gasket

PTFE coated gasket

Other types of non-metallic gaskets

Metal-nonmetal composite gasket

Wave gasket

Metal spiral wound gasket

Metal toothed composite gasket

Metal coated gasket

Metal corrugated composite gasket

Other types of metal composite gaskets

Folding metal gasket

Metal flat gasket

Metal corrugated gasket

Metal toothed gasket

Metal ring gasket

Metal lens gasket

Metal O-ring gasket

Material classification

The washer is a part between the connecting piece and the nut, generally a flat metal ring.

Non-metallic gasket non-metallic gasket A gasket made of asbestos, rubber, synthetic resin, polytetrafluoroethylene and other non-metallic gaskets. a Non-metallic jacket gasket non-metallic jacket gasket Non-metallic jacket gasket covered with a layer of synthetic resin.

Semimetallic gaskets semimetallic gaskets are gaskets made of metal and non-metallic materials, such as spiral wound gaskets and metal-coated gaskets. a Spiral wound gasket is a spiral wound gasket made of a V-shaped or W-shaped section of a metal band clamped with a non-metallic tape. ) Inner ring A metal ring set on the inner ring of a spiral wound gasket. 2) Outer ring The outer ring is a metal ring set on the outer ring of a spiral wound gasket. b Metal clad

Metallic gasket is a gasket made of metal such as steel, aluminum, copper, nickel, or Monel.

Spiral wound gasket refers to a gasket wound with a metal belt (usually a v-shaped steel belt) and a non-metallic belt in a ring shape. The metal belt and the non-metallic belt are alternately wound. In the flange sealing structure of the electric power industry, according to the specific location, a steel ring can be added to the inner or outer layer of the gasket to locate or strengthen.