Application And Use Standard Of Rubber Gasket
Sep 01, 2022
Sheet-shaped rubber products that seal between two stationary surfaces of metal flanges or other connecting parts are collectively referred to as rubber gaskets. It can be manufactured by molding method, and can also be processed by vulcanized film. It can be widely used in all kinds of mechanical equipment, playing the role of lining, sealing, buffering and so on.
Rubber gaskets have the properties of oil resistance, acid and alkali resistance, cold and heat resistance, aging resistance, etc., and can be directly cut into various shapes of sealing gaskets, which are widely used in medicine, electronics, chemical industry, antistatic, flame retardant, food and other industries.
1. In terms of form, commonly used rubber washers include: rubber flat washers, rubber O-rings, plastic flat washers, teflon-coated washers, asbestos rubber washers, metal flat washers, metal special-shaped washers, metal sheath washers, corrugated washers Washers, wound washers, etc.
Rubber flat washers:
It is easy to deform, and it is easy to press, but the pressure and temperature resistance are poor, and it is only used in places where the pressure is low and the temperature is not high. Natural rubber has a certain acid and alkali resistance, and the operating temperature should not exceed 60 °C; neoprene rubber is also resistant to some acids and alkalis, and the operating temperature is 80 °C; nitrile rubber is oil-resistant and can be used up to 80 °C; Fluorine rubber has good corrosion resistance and is resistant to The temperature performance is also stronger than that of general rubber, and it can be used in a medium of 150 °C.
Rubber sealing gasket:
The cross-sectional shape is a perfect circle, which has a certain self-tightening effect. The sealing effect is better than that of a flat washer, and the pressing force is smaller.
2. In terms of material, the main products of rubber pads are: silicone pads, nitrile rubber pads, fluororubber pads, and other rubber pads. Rubber gaskets have the properties of oil resistance, acid and alkali resistance, cold and heat resistance, aging resistance, etc., and can be directly cut into various shapes of sealing gaskets, which are widely used in medicine, electronics, chemical industry, antistatic, flame retardant, food and other industries.
Silicone Rubber:
It has outstanding high and low temperature resistance, maintains good flexibility in the temperature range of -70°C to +260°C, is resistant to ozone and weathering, and is suitable for sealing gaskets in thermal machinery. It is non-toxic and can be used to make thermal insulation, insulation products and medical rubber products. At the same time, it has excellent properties such as waterproof, flame retardant, high temperature resistance, electrical conductivity, wear resistance, oil resistance, etc. It is widely used in machinery, electronics, plumbing and other industries.
Nitrile rubber:
NBR (Nitrile-Butadiene Rubber) is a polymer formed by emulsion copolymerization of butadiene and acrylonitrile. It is famous for its excellent oil resistance, as well as good wear resistance, aging resistance and air tightness. Therefore, it is widely used in the rubber industry.
fluororubber:
It has high temperature resistance, can be used in the environment of -20℃-+200℃, and is resistant to strong oxidants, oil, acid and alkali. Usually used in high temperature, high vacuum and high pressure environment, but also suitable for oil environment, widely used in petroleum, chemical, aviation, aerospace and other departments.
Other:
Neoprene, natural rubber, EPDM, acrylate and other specialty rubbers. It has the characteristics of oil, acid, alkali, wear resistance, high and low temperature resistance.
Standard for use of rubber gasket:
To give full play to the characteristics of various gaskets, the following factors should be fully considered when using rubber gaskets:
1. It has good elasticity and recovery, can adapt to pressure changes and temperature fluctuations, has appropriate flexibility, and can fit well with the contact surface;
2. Does not pollute the process medium;
3. No hardening at low temperature, small shrinkage;
4. Good processing performance, easy installation and pressing;
5. No adhesive sealing surface, easy to disassemble.
