Fire extinguisher: 1.Longer shelf time. 2.Near 100% emptying. 3. ... be used in all angles. 4.Less noise when spraying. Fire Extinguisher BOV's Specifications: Name Bag on valve Other name ... Aerosol valve bag, Valve in bag Structure 1"Valve, Mounting Cup, Outer gasket, Inner gasket, Stem, Spring, Housing, Bag-on-valve ... when spraying CET ISO 9001:2000 Bag-on-valve for fire extinguisher