About vacuum in production

Why we are not writing (-mmhg )in bpr(batch production record) for vacuum ?when vacuum guage and pressure transmitter showing us minus reading .

As because Vacuum is always considered as negative pressure.


You are right sir but GDP telling us write which is you seen where gauge showing us minus reading so that.

Sir dry injection

Filling area m hm kon sa vacuum use krte h
Mns which types of vacuum are used for filling dry injectable product