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A high temperature resistant material for valve sealing

A technology of valve sealing and high temperature resistance, applied in the field of high temperature resistant materials, can solve the problems of loss of sealing performance, easy to accelerate aging, etc., and achieve the effect of improving corrosion resistance and flexibility

Active Publication Date: 2019-01-18
SUZHOU KEDI FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a control component in a fluid delivery system, valves require high sealing performance. The use of non-metallic sealing materials commonly used at present is greatly affected by the external temperature, and it is easy to accelerate aging or even lose sealing performance in high temperature environments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Get the following materials according to mass percentage:

[0015] 70% polybenzimidazole, 4% pitch carbon fiber, 5% glass fiber, 3% aluminum-chromium alloy nanofiber, 2% graphite, 0.6% sulfur, and 15.4% mineral powder.

[0016] The mineral powder is a mixture of titanium peroxide and zinc oxide with a weight ratio of 1:1, and the mineral powder is 80 mesh.

[0017] The above materials are subjected to reliability test after mixing, burning and finalizing. The operating temperature is -137°C--330°C.

Embodiment 2

[0019] Get the following materials according to mass percentage:

[0020] Polybenzimidazole 72%, pitch carbon fiber 4.8%, glass fiber 6.4%, aluminum chromium alloy nanofiber 4%, graphite 2.8%, sulfur 0.8%, mineral powder 9.2%.

[0021] The mineral powder is a mixture of titanium peroxide and zinc oxide with a weight ratio of 2:5, and the mineral powder is 70 mesh.

[0022] The above materials are subjected to reliability test after mixing, burning and finalizing. The operating temperature is -105°C--560°C.

Embodiment 3

[0024] Get the following materials according to mass percentage:

[0025] 75% polybenzimidazole, 6% pitch carbon fiber, 7% glass fiber, 5% aluminum chromium alloy nanofiber, 4% graphite, 0.8% sulfur, 2.2% mineral powder.

[0026] The mineral powder is a mixture of titanium peroxide and zinc oxide with a weight ratio of 2:1, and the mineral powder is 80 mesh.

[0027] The above materials are subjected to reliability test after mixing, burning and finalizing. The operating temperature is -126°C--410°C.

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PUM

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Abstract

The invention discloses a high temperature resistant material for sealing a valve. The material is prepared from ingredients in percentage by weight: 70-75% of polybenzimidazole, 4-6% of asphalt carbon fiber, 5-7% of glass fiber, 3-5% of aluminum-chromium alloy nanometer fiber, 2-4% of graphite, 0.6-0.8% of sulfur and the balance of mineral powder. Preferably, the material is prepared from all the ingredients in percentage by weight: 72% of polybenzimidazole, 4.8% of asphalt carbon fiber, 6.4% of glass fiber, 4% of aluminum-chromium alloy nanometer fiber, 2.8% of graphite, 0.8% of sulfur and 9.2% of mineral powder; the mineral powder is not larger than 80 meshes; the mineral powder is a mixture of titanium peroxide and zinc oxide, and preferably, the mass ratio of titanium peroxide to zinc oxide is 2:5. According to the high temperature resistant material for sealing the valve, various other materials are added into the high temperature resistant polybenzimidazole, and the added materials further improve corrosion resistance and flexibility of the material on the base of guaranteeing high temperature resistance of the polybenzimidazole. The material is more suitable for sealing the valve.

Description

technical field [0001] The invention relates to a high temperature resistant material, more precisely, a high temperature resistant material used for valve sealing. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. [0003] As a control component in a fluid delivery system, valves require high sealing performance. The use of commonly used non-metallic sealing materials is greatly affected by the external temperature, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08K13/04C08K7/06C08K7/14C08K3/04C08K3/06C08K3/22
CPCC08K3/04C08K3/06C08K3/22C08K7/06C08K7/14C08K13/04C08K2003/2237C08K2003/2296C08K2201/011C08L2201/08C08L79/04
Inventor 田洪卫
Owner SUZHOU KEDI FLUID CONTROL EQUIP