PERFORMANCE

• 
  

  Product features:

  1Large axial displacement compensation and long service life.
  2 Excellent material and stable operation.
  3 Compensate the axial thermal deformation of the absorption pipeline.
  4 Metal bellows expansion and contraction, easy to install and disassemble the valve pipe.
  5 Absorb equipment vibration to reduce the impact of equipment vibration on the pipeline.

• 
  

  Application:

  321 stainless steel features Ti element added to 304 steel to prevent grain boundary corrosion, suitable for use at 430℃ -900℃. 321 bellows expansion joints are widely used in high-temperature pipelines, high-temperature chemical pipelines, high-temperature pipelines of granular media, etc.

• 
  

  Principle of axial movement of 321 bellows expansion joint:

  The axial movement of the 321 bellows expansion joint 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 321 bellows expansion joint is capable of absorbing small lateral and angular deviations as well as mounting tolerances.

• 
  

  Structure:

  Bellows: in order to have a longer service life, all the products are made of 304 stainless steel and 304L, and all kinds of spectrometers are supported.
  Connection flange : the flange is made of stainless steel 304, 304L material
  Limit lug: all limit lugs are made of larger and thicker size
  Limit nut: all nuts adopts 321 material

WORKING PRINCIPLE

PRODUCT PARAMETERS

NOTES:

1. Flange is available with DIN Standard,ANSI Standard,JIS Standard,and BS Standard.
2. 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.