Welcome to Huahao, Jing County, the largest rubber product production base in North China
Today we will explain the performance of gaskets
The company providesSilicone tube, silicone sealing strip, silicone ring, silicone inflatable sealing ring

Types include:

(1) Rubber flat washer: easy to deform, easy to press, but has poor pressure and temperature resistance, only used in places with low pressure and low temperature. Natural rubber has certain acid and alkali resistance, and its usage temperature should not exceed 60 ℃; Chloroprene rubber can also withstand certain acids and alkalis, with a usage temperature of 80 ℃; Nitrile rubber is oil resistant and can be used up to 80 ℃; Fluororubber has excellent corrosion resistance and stronger temperature resistance than ordinary rubber, and can be used in media at 150 ℃.
(2) Rubber O-ring gasket: The cross-sectional shape is perfectly circular, with a certain degree of self tightening effect. The sealing effect is better than that of a flat gasket, and the clamping force is smaller.

(3) Plastic flat washer: The biggest characteristic of plastic is its good corrosion resistance, while most plastics have poor temperature resistance. Polytetrafluoroethylene is a plastic with excellent corrosion resistance and a wide temperature range, which can be used for a long time within -180 ℃ to+200 ℃.

(4) PTFE wrapped gasket: In order to fully utilize the advantages of PTFE and compensate for its poor elasticity, a gasket made of PTFE wrapped rubber or asbestos rubber is used. In this way, it is corrosion-resistant like polytetrafluoroethylene flat washers and has good elasticity, enhancing the sealing effect and reducing the clamping force. The cross-sectional shape is shown in Figure 4-20.

(5) Asbestos rubber gasket: cut from asbestos rubber sheet. Its components are 60-80% asbestos and 10-20% rubber, as well as fillers, vulcanizing agents, etc. It has good heat resistance, cold resistance, chemical stability, and abundant supply at a cheap price. When in use, the clamping force does not need to be very strong. Due to its ability to adhere to metals, a layer of graphite powder is applied to the surface to avoid difficulties during disassembly.

There are four colors of asbestos rubber sheet: gray, used for low voltage (grade XB-200, pressure resistance ≤ 16 kg/cm2, temperature resistance 200 ℃); Red, used for medium voltage (brand XB-350, with a pressure resistance of up to 40 kg/cm2 and a temperature resistance of 350 ℃); Purple red, used for high voltage (brand XB-450, pressure resistance of 100 kg/cm2, temperature resistance of 450 ℃); Green, used for oils, also has good pressure resistance.

(6) Metal flat heating ring: lead, temperature resistance of 100 ℃; Aluminum 430 ℃; Copper 315 ℃; Low carbon steel at 550 ℃; Silver 650 ℃; Nickel at 810 ℃; Monel (nickel copper) alloy at 810 ℃, stainless steel at 870 ℃. Lead has poor pressure resistance, aluminum can withstand 64 kg/cm2, and other materials can withstand high pressure.

(7) Metal anisotropic washer:

Lens gasket: has a self tightening effect and is used for high-pressure valves.

Common gasket performance

When using valves, the original gasket is often replaced according to the specific situation. Common gaskets include: rubber flat gasket, rubber O-ring, plastic flat gasket, PTFE wrapped gasket, asbestos rubber gasket, metal flat gasket, metal irregular gasket, metal foreskin gasket, waveform gasket, winding gasket, etc.