genom tryckskillnad styrbar reglerbar konstantstroemventil foer reglering och konstanthaollande av ventilering av enskild laegenhet i gemensamma kanalsystem och foer reglering och konstanthaollande avfloeden av gasformiga medier genom mediets tryckskillnad i allmaenhet

摘要

The valve adjustment mechanism comprises a cylinder-piston combination or a bellows unit. The cylinder space (43) is connected with the high pressure side, and to the low pressure side via apertures, and the relationship between the area of the two apertures is adjustable. One of the apertures is formed as a seat ring, in the centre of which a valve plate with a conical surface is fitted. (Provisional Basic advised Week D06)