PERFORMANCE

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  Advantages:

  1. It can be installed at the inlet and outlet of the pump or other high-frequency mechanical analysis to reduce or eliminate its vibration, improve the service life and sealing performance of the pipeline. It solves the problems that metal bellows can’t solve, reduces the cost of the enterprise, and improves the production efficiency. In addition, it can be used to absorb deviations between the design and the actual installation. It has the advantages of reliable operation, compact structure and strong compensation ability, resistance to corrosion of various media and long service life.
  2. The structure has outer layer 304 stainless steel corrugated, can withstand the pressure of normal pipeline, lined with PTFE material, and PTFE is a polymer of tetrafluoroethylene. The English abbreviation is PTFE.
  3. The PTFE expansion joints overcomes the shortage of corrosion resistance of the stainless steel metal bellows; it solves the shortcoming that the rubber composite metal bellow is difficult to withstand higher working pressure. In addition to strong corrosion resistance and high pressure, the product has the characteristics of high standardization, good versatility, strong interchangeability, anti-aging, reliable sealing and long service life.

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  Purpose :

  The lining PTFE expansion joints has the advantages of low chemical activity, resistance to various chemicals, weather resistance, corrosion resistance, etc., and is not prone to aging. The lining PTFE expansion joints has strong anti-adhesiveness, low friction coefficient and excellent electrical characteristics.Under the condition of strong corrosive medium, the operating temperature is high, which can meet the working temperature range of -40℃to 200℃. All chemical media can meet this temperature range. Under the condition of strong corrosive medium, the operating temperature is high, which can meet the working temperature range of – 40 ~ 200 C. All chemical medium can meet the temperature range.

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  Principle of axial motion:

  Axial movement is considered to be the elongation or compression of the pipe system on its longitudinal axis, which means that the total length of the expansion joint will extend or compress during the absorption movement. An axial expansion joint designed to absorb large motions can contain one, two or more bellows in one unit, and can also achieve greater motion by pretensioning or by installing multiple expansion joints on the pipe section. . Depending on the nominal diameter and length, the axial expansion joints are able to absorb small lateral and angular deviations as well as mounting tolerances. However, we recommend the use of the main function that should limit the axial expansion joint, otherwise its service life may be adversely affected.

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  Expanding knowledge:

  1. Insulation: not affected by the environment and frequency, the volume resistance can reach 1018 ohm/cm, the dielectric loss is small, breakdown power.
  2. High and low temperature resistance: The influence on temperature is not changed much, and the temperature range is wide. The temperature can be used from -190 to 260℃.
  3. Self-lubricating: It has the smallest friction coefficient in plastic and is an ideal oil-free lubricating material.
  4. Non-stick surface: Known solid materials can not adhere to the surface, it is a solid material with the smallest surface energy.
  5. Resistance to atmospheric aging, radiation resistance and low permeability: long-term exposure to the atmosphere, surface and performance remain unchanged.
  6. Non-combustibility: the oxygen limit index is below 90.

WORKING PRINCIPLE

PRODUCT PARAMETERS

NOTES:

Please sent us letter and drawing for customization if you have special requirements.

PRODUCT ALBUM

INSTALLATION INSTRUCTIONS

1. It should be noted that the metal expansion joint does not absorb torque, so it is not allowed to be twisted when installing stainless steel bellows.
2. 2.In addition to the pre-tension or “cold-tight” deformation required by the design, it is strictly prohibited to use bellows deformation method to adjust the deviation of the installation pipeline, so as to avoid affecting the normal function of the metal bellows, otherwise it will reduce its service life and increase the load of the pipeline, equipment and supporting components.
3. The insulation layer should be made on the outer protective jacket of the metal bellows, not directly on the bellows.
4. During installation, no welding slag is allowed to splash on the surface of bellows, causing other mechanical damage to the bellows.
5. The bracket must meet the design requirements. It is strictly prohibited to test the pressure in the pipeline before the bracket is installed in order to avoid pulling it out.
6. All moving parts of the stainless steel 304L metal bellows shall not be caught or restricted by the external components.