Diaphragm Design Manual - Simrit

Formula 5 – Height Calculation for Deep Draw DiaphragmsDeep Draw HeightFlangeRadius 1.56 ConvWidth Half Stroke Flange Thickness 2.SF Formula 6 – Half Stroke for Deep Draw DiaphragmsDeep Draw HalfStrokeFlangeRadius 1.56 ConvWidth Height Flange Thickness 2.SF Cylinder DiameterSafety Factor (SF)Table 9 – Calculation Safety Factors.25 / .99 1.00 / 2.50 2.51 / 4.00 4.01 and Up0.06 0.10 0.12 0.14Double Tapered Deep Draw Style - Figure 7:As a way of reducing the Circumferential Compression a rolling convolution normally goesthrough during its stroke cycle, a standard deep draw diaphragm can be augmented with a secondtaper. By adding this second taper, the main sidewall angle is greatly reduced thereby reducing thecircumferential compression increasing the life of the diaphragm.Please also review the discussions on Circumferential Compression and The Effective Area ofDiaphragms in the Selected Design Topics section for additional information.Due to the wide variety of options,please contact Simrit for dimensionaldetails on double taper diaphragmsFigure 7 – A Typical Double Taper DiaphragmAlternate Diaphragm ConstructionsAll formed diaphragm styles can be made with or without: Fabric Added Sealing Features Gasketing Inserts, and CladdingEach of these options are further detailed in the next section, Selected Design Topics.© Copyright FNGP 200924