Type：VVN10HNFAPUMU VVN12HNFAPUMU Features： Heresite coated Body，cones and rods； 316 Stainless rods； Aluminum body； The opening's up to the Air flow, and there're 48 calibrated points; 150~750pa pressure independent； Precision: less than ±5% of command； Turn down ratio: > 16:1； Responding: less than 1 second； Pressure independent, inside pressure maintenance period ＜ 1 sec； No need for spool； Electric valve； Vertical or horizontal installation.

low-leakageshut-offvalvesareappliedinnearlyno-leakageventilationsystemsforriskenvironmentswhichrequireanemergencyisolationorbiologicalpurification.Usuallyusedinbiosafetylaboratories,animalrooms,cleanrooms,etc.

Suitableforexhaustequipmentthatgenerallyneedstobeclosedorsupplyandexhaustductsinrooms.Whenshuttingdown,theflowwillbereducedtoachievetheminimumenergysavingeffect.Generallyusedwhentheroomexhaustvalveisclosed,thefumehoodisnotinuse,ortheentirelaboratoryisnotinuse.