Ideal for demanding bellows applications

Advanced engineering and design capabilities allow MS Bellows to manufacture edge welded bellows for a variety of critical reliability applications.

Using the latest manufacturing techniques and stringent process control, zero defect quality is maintained at a competitive price.

Several diaphragm contour designs are available, each with different functional properties.

The most popular are shown below.

Variations of each contour are available to complement your specific design application.

Our engineering staff will gladly provide you with recommendations and assistance.

Edge-Welded Bellows Contact Us To Get Started
Typical Applications Typical Applications

Typical Applications

  • Volume Compensators
  • Pressure Transducers
  • Shaft Couplers
  • Aneroid Assemblies
  • Mechanical Seals
  • Pipe Expansion Joints
  • Reservoir & Accumulators
  • Vacuum Feedthroughs
  • Pump/Compressor Components

Advantages

  • Long Stroking Capability Per Unit Length of Bellows
  • Short Compressed Length
  • Long Fatigue Life Under Rigorous Operating Conditions
  • High Volumetric Displacement Efficiencies for Tight Space Package Envelopes
  • Excellent Operating Capacities in High Pressure and High Temperature Environments
  • All-Welded Construction
  • Excellent In-Service Corrosion Resistance
  • Leak Tight to Helium Mass Spectrometer Requirements
  • Large Sizes Available
  • Materials and diaphragm profiles are available for a wide variety of applications

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End-Fitting Attachments​ End-fittings can be machined or formed in a variety of configurations.
End-Fitting Attachments​ End-Fitting Attachments​ End-Fitting Attachments​

Diaphragm Contours & Spring Properties

Nested Ripple Design Nested Ripple Design

The nested ripple profile provides long stroking capability with linearity of stroke vs. pressure, plus very good resistance to pressure. This is the most commonly used design.

Flat Plate Design Contact Us For Details

The flat plate design offers the best linearity of force output vs. pressure due to the more constant effective area. Stroking capability is fair and spring rate low.

  • Process
    Individual diaphragms are formed Individual diaphragms are formed
    Inner diameter welded to form a convolution Inner diameter welded to form a convolution
    Convolutions are welded at O.D.s to make a bellow Convolutions are welded at O.D.s to make a bellows
    End-fittings are welded to the bellows to produce a complete bellows assembly. End-fittings are welded to the bellows to produce a complete bellows assembly.
  • Standard Sizes
    Outer Diameter (in.)
    Inner Diameter (in.)
    Effective Area (sq. in.)
    Material Thickness (in.)
    Spring Rate Per Convl’n (lbs./in./con.)
    Convl’n Pitch (in./con.)
    Max Stroke, Compression (in./con.)
    Max Stroke Extension (in./con.)
    .315.135.040.002340.021.014.005
    .388.128.052.002180.026.020.007
    .504.218.102.003400.032.023.008
    .568.282.142.003375.033.024.008
    .608.228.137.0025225.043.036.012
    .750.250.196.0025150.038.030.009
    .840.340.273.003187.040.031.010
    .893.499.380.004600.036.024.008
    .950.670.515.0025280.027.019.006
    1.010.716.591.00351060.031.021.007
    1.122.746.688.0025210.032.024.008
    1.125.535.542.0051100.053.038.013
    1.158.752.724.005960.040.025.008
    1.250.757.791.003180.033.024.008
    1.325.931.999.004855.033.021.007
    1.348.536.697.004192.060.038.013
    1.379.777.913.004522.042.030.010
    1.430.825.998.004391.056.045.015
    1.4671.2621.462.0025455.023.015.005
    1.5001.0001.227.0062053.032.015.005
    1.5261.1541.410.003415.030.021.007
    1.6251.1251.485.005962.045.030.010
    1.6441.2441.638.004840.040.028.009
    1.8171.2461.813.003280.032.023.008
    1.9371.4002.187.004450.050.038.013
    2.0061.6962.691.004780.034.022.007
    2.1001.4002.405.004275.050.038.013
    2.4191.7023.334.004225.049.037.012
    3.0002.0004.908.006312.076.058.019
    3.4782.8767.942.0051350.057.042.014
    3.6562.8408.286.005825.060.045.015
    3.9003.1009.619.005630.080.065.021
    Properties such as spring rate can be adjusted to meet your specific requirement. This is partial listing of available die-sets for welded bellows. Please contact our staff for additional size requirements. Welded bellows up to 10.00 inches in outer diameter can be fabricated.
  • Design Equatons
    Edge-Welded Bellows Configuration

    K — Bellows Axial Spring Rate. The Ratio of Force to Stroke. (Lbs./In.)
    K/C — Spring Rate per Convolution.
    Ae — Bellows Effective Area. Equivalent Piston Area That Produces Axial Thrust. (Sq. In.)
    A/K — Bellows Pressure Sensitivity. The Amount of Stroke Per Pressure Change. (In./Psi)
    P — Convolution Pitch (In.)
    Nc — Number of Convolutions
    Lf — Free Length of Bellows. (In.)
    y — Bellows Stroke or Deflection. (In.)
    ΔP — Pressure Differential Across Bellows. (Psi)
    ΔV — Fluid Volume Displacement. (Cu. In.)

Consult Our Engineering Staff Regarding Your Specific Application Requirement

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