New dry powder extinguishers are usually valid for five years, and refilled dry powder extinguishers are usually valid for one year, up to two years.
Dry powder fire extinguishers placed for a long time will cause the dry powder agglomerates in the fire extinguishers, resulting in unable to spray completely or unable to spray, etc., so after the expiration of the dry powder fire extinguishers must be sent to the fire extinguishers have the qualification of fire extinguishers aeration powder replacement treatment.
If the dry powder extinguisher is used for a long time, the pressure in the fire extinguisher will drop, so the fire extinguisher cannot be sprayed. Therefore, if the pressure of the fire extinguisher is insufficient, the fire extinguisher should be sent to a qualified maintenance fire extinguisher enterprise for aeration treatment.
Once the expiration date of this dry powder extinguisher is reached, the product must be replaced. Otherwise, it will not only fail to put out the fire, but also increase our property losses.
