Edge-Welded Bellows
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 compliment your specific design application.
Our engineering staff will gladly provide you with recommendations and assistance.
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
End-Fitting Attachments
End-fittings can be machined or formed in a variety of configurations.
Diaphragm Contours & Spring Properties
Nested Ripple Design
Flat Plate 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.
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.
.315 | .135 | .040 | .002 | 340 | .021 | .014 | .005 |
.388 | .128 | .052 | .002 | 180 | .026 | .020 | .007 |
.504 | .218 | .102 | .003 | 400 | .032 | .023 | .008 |
.568 | .282 | .142 | .003 | 375 | .033 | .024 | .008 |
.608 | .228 | .137 | .0025 | 225 | .043 | .036 | .012 |
.750 | .250 | .196 | .0025 | 150 | .038 | .030 | .009 |
.840 | .340 | .273 | .003 | 187 | .040 | .031 | .010 |
.893 | .499 | .380 | .004 | 600 | .036 | .024 | .008 |
.950 | .670 | .515 | .0025 | 280 | .027 | .019 | .006 |
1.010 | .716 | .591 | .0035 | 1060 | .031 | .021 | .007 |
1.122 | .746 | .688 | .0025 | 210 | .032 | .024 | .008 |
1.125 | .535 | .542 | .005 | 1100 | .053 | .038 | .013 |
1.158 | .752 | .724 | .005 | 960 | .040 | .025 | .008 |
1.250 | .757 | .791 | .003 | 180 | .033 | .024 | .008 |
1.325 | .931 | .999 | .004 | 855 | .033 | .021 | .007 |
1.348 | .536 | .697 | .004 | 192 | .060 | .038 | .013 |
1.379 | .777 | .913 | .004 | 522 | .042 | .030 | .010 |
1.430 | .825 | .998 | .004 | 391 | .056 | .045 | .015 |
1.467 | 1.262 | 1.462 | .0025 | 455 | .023 | .015 | .005 |
1.500 | 1.000 | 1.227 | .006 | 2053 | .032 | .015 | .005 |
1.526 | 1.154 | 1.410 | .003 | 415 | .030 | .021 | .007 |
1.625 | 1.125 | 1.485 | .005 | 962 | .045 | .030 | .010 |
1.644 | 1.244 | 1.638 | .004 | 840 | .040 | .028 | .009 |
1.817 | 1.246 | 1.813 | .003 | 280 | .032 | .023 | .008 |
1.937 | 1.400 | 2.187 | .004 | 450 | .050 | .038 | .013 |
2.006 | 1.696 | 2.691 | .004 | 780 | .034 | .022 | .007 |
2.100 | 1.400 | 2.405 | .004 | 275 | .050 | .038 | .013 |
2.419 | 1.702 | 3.334 | .004 | 225 | .049 | .037 | .012 |
3.000 | 2.000 | 4.908 | .006 | 312 | .076 | .058 | .019 |
3.478 | 2.876 | 7.942 | .005 | 1350 | .057 | .042 | .014 |
3.656 | 2.840 | 8.286 | .005 | 825 | .060 | .045 | .015 |
3.900 | 3.100 | 9.619 | .005 | 630 | .080 | .065 | .021 |
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.)