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Tetrafluoroethylene composite punched teeth steel sealing gasket and method for making same

A technology of sealing gasket and tetrafluoro gasket, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of low operating pressure, low operating temperature and low strength of tetrafluoro gasket, and achieve good sealing effect. Effect

Inactive Publication Date: 2005-03-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing PTFE gasket has a low working pressure, the highest is 5.0MPa. When the diameter of the sealing gasket is large, the working pressure is lower than 2.0MPa, and the working temperature is low. The commonly used working temperature is lower than 150°C, with cold flow phenomenon and creep Larger, if there are pressure fluctuations and temperature fluctuations, it is easy to cause leakage, and the strength is not high

Method used

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  • Tetrafluoroethylene composite punched teeth steel sealing gasket and method for making same

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Embodiment

[0017] Fluorine chemical pipelines, with a working pressure of 8.0Mpa and a temperature of -196°C, originally used imported PTFE gaskets, but domestic pure PTFE gaskets were used, and the working pressure was not enough; instead, PTFE compound punched steel gaskets were used, and the service conditions were met. .

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Abstract

This invention discloses a tetrafluoro complex sealed shim and its facture. In the shim is the tooth-rushing steel disk upward and downward alternatively. The colophony around is suppressed and sintered under the high temperature from 370 deg. C to 430 deg. C. This invention is suitable for all kinds of pressure container and pipe flange airproof, especially the industries such as the FI chemistry, medical chemistry, biological pharmacy, and petroleum chemistry under the mid-pressure 2.0MPa~10.0MPa, the temperature of minus 196 deg. C~250 deg. C, and has good effect of airproof.

Description

Technical field [0001] The invention relates to a tetrafluoro compound punching steel sealing gasket and a manufacturing method thereof. Background technique [0002] The existing PTFE gasket has a low working pressure, the highest is 5.0MPa. When the diameter of the sealing gasket is large, the working pressure is lower than 2.0MPa, and the working temperature is low. The commonly used working temperature is lower than 150°C, with cold flow phenomenon and creep Larger, if there are pressure fluctuations and temperature fluctuations, it is easy to cause leakage, and the strength is not high. Contents of the invention [0003] The object of the present invention is to provide a PTFE composite punching steel sealing gasket and its manufacturing method, which is to increase the service temperature of the PTFE gasket, expand the working pressure range, reduce the PTFE cold flow, and improve the strength and springback of the gasket. [0004] The technical scheme that the pres...

Claims

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Application Information

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IPC IPC(8): F16J15/12
Inventor 邵君平汪希萱
Owner ZHEJIANG UNIV
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