Dry Chemical Agents Information

Chemguard has been a supplier of quality fire extinguishing dry chemical agents for almost two decades, providing agents based on monoammonium phosphate, sodium bicarbonate, and potassium bicarbonate. The well-known quality of Chemguard dry chemical agents is the result of many years of product research and development. One of the procedures performed during the manufacturing cycle is the siliconization treatment of the agent. This provides resistance to packing, moisture absorption (caking) and ensures proper flow characteristics. Quality control checks are performed during the manufacturing process to control the dry chemical agent composition, particle size through sieve analysis, bulk density, moisture content and hygroscopicity. The result is an agent that is cost efficient with maximum fire extinguishing performance, versatility and storage stability.

Different types of Chemguard dry chemical agents are necessary to extinguish different types of fires. The different type fire classifications listed on the Chemguard data sheets are based on NFPA Standards.

Classifications are as follows:

  • Class A - Fires in ordinary combustible materials such as wood, cloth, paper, rubber and many plastics.
  • Class B - Fires in flammable liquids, oils, greases, tars, oil based paints, lacquers, etc.  and flammable gases.
  • Class C - Fires involving “live” electrical equipment where the use of a non-conducting fire agent is required.
  • Class D - Fires involving combustible metals and their alloys such as magnesium, sodium, potassium, lithium, titanium, etc.

In order of performance, fire tests on flammable liquids have shown potassium bicarbonate based dry chemical to be more effective than sodium bicarbonate based dry chemical. Similarly, the monoammonium phosphate based dry chemical has been found equal to or better than the sodium bicarbonate based chemical.

“Multi-Purpose” (ABC) monoammonium phosphate based dry chemical agent is yellow in color. This agent is suitable for use on Class A, B or C type fires and of particular value on combination fires.

“Regular or Standard” (BC) dry chemical refers to an agent that is suitable for use on either Class B or C type fires. These agents are sodium bicarbonate based and blue in color.

Purple K (PK) dry chemical agent is based on potassium bicarbonate. Because of its fast extinguishing capability on flammable liquid fires, it is typically used in high hazard risk areas such as refineries, chemical plants or airports. The color of PK agent is purple.

Chemguard dry chemical agents are for use in the hardware it is designed and tested with, from small extinguishers to large fixed installations and mobile units.

For more information, contact fire suppression customer support.