Vedant System And Services manufactures Stored / Generated Pressure Fire Extinguisher. Vedant System And Services offers various types of access control system, Closed circuit Television, Intruder Alarm system, Audio/Video communication systems, Perimeter detection system etc. Stored / Generated Pressure Fire Extinguisher is used to extinguish or control small fires, often in emergency situations. There are two main types of fire extinguishers: Stored pressure and generated pressure. In stored pressure units, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used, different propellants are used. With dry chemical extinguishers, nitrogen is typically used; water and foam are pressurized with air.