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Flat diaphragms

EFFBE flat, short stroke diaphragm, polyester reinforcement, polyamide reinforcement, aramid, cellulose, cotton

These diaphragms are used for very short stroke and are obtained by cutting flat materials: diaphragm cloth and/or elastomer sheets.

The following basic rules must be observed to avoid excessive stress and the formation of folds in the diaphragm:
  • The outside and centre distances of the diaphragm fixing holes must be increased by the correction coefficient K = 0.02 DG in relation to the dimensions of the appliance.
  • The diaphragm must be re-tensioned during assembly so that the fixing holes and the outside of the diaphragm match the dimensions of the device.
  • The flat diaphragm must also be able to reach the extreme working positions required without straining.
As a result, in relation to the internal diameter of the device, the maximum flat diaphragm stroke is low: up to 6% for regulation and up to 10% for other applications. Within these operating ranges, subsidence remains free of radial folds.
Design of EFFBE flat diaphragms

EXAMPLES OF FLAT DIAPHRAGMS

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