The demand diaphragm rubber must be fitted by a trained technician, according to the instruction of Interspiro's service manual. Although a simple task, safety depends on the technician's understanding of the breathing valve function and assiduity in checking that the diaphragm is whole, functional and assembled correctly.
The demand diaphragm mechanism amalgamates both the demand and exhalation parts, so that the breathing system is fully balanced and Work of Breathing (WOB) remains low.
Material is EPDM rubber: expected service life => 5 years.
For the DIVATOR, typical breathing rates induce WOB less than 1 joule/litre/second; as here illustrated. This unprecedented performance depends on correct assembly and adjustment.