How to inflate dry powder fire extinguisher
Dry powder fire extinguishers are one of the common fire-fighting equipment. Regular inspection and filling are key steps to ensure their normal use. This article will introduce the charging method of dry powder fire extinguisher in detail, and attach relevant data for reference.
1. Preparations before charging the dry powder fire extinguisher
Before inflating, you need to make the following preparations:
| steps | Operation content |
|---|---|
| 1 | Check whether the appearance of the fire extinguisher is intact and free of rust or damage |
| 2 | Confirm whether the pressure gauge pointer is in the green area (normal range) |
| 3 | Check the expiry date and production date on the fire extinguisher label |
| 4 | Prepare inflation equipment (such as nitrogen bottles, pressure regulators, etc.) |
2. Inflating steps of dry powder fire extinguisher
The following are the steps for charging a dry powder fire extinguisher:
| steps | Operation content |
|---|---|
| 1 | Place the fire extinguisher on a stable surface with the valve facing upwards |
| 2 | Use a special tool to unscrew the fire extinguisher's inflation valve |
| 3 | Connect a nitrogen bottle or gas filling device and slowly inject gas |
| 4 | Observe the pressure gauge to ensure that the pressure reaches the standard value (usually 1.2-1.5MPa) |
| 5 | Close the inflation valve and check for leaks |
| 6 | Attach an inflation date label to record inflation information |
3. Precautions for charging dry powder fire extinguishers
Please pay attention to the following matters during the inflation process:
| Things to note | Description |
|---|---|
| 1 | Use dry nitrogen when inflating, avoid using air or oxygen |
| 2 | The inflation pressure must not exceed the maximum pressure value marked on the fire extinguisher |
| 3 | A leak test is required after inflation to ensure tightness |
| 4 | Inflating operations should be completed by professionals and avoid operating by yourself |
4. Inspection after inflating the dry powder fire extinguisher
After the inflation is completed, the following inspections need to be carried out:
| Check items | Standard |
|---|---|
| pressure gauge reading | The pointer is in the green area |
| Valve tightness | No gas leakage |
| Appearance integrity | No damage or rust |
| Label information | The inflation date is clearly visible |
5. Charging cycle of dry powder fire extinguisher
According to national standards, the charging cycle of dry powder fire extinguishers is as follows:
| Fire extinguisher type | Inflation cycle |
|---|---|
| Ordinary dry powder fire extinguisher | Every 5 years or when there is insufficient pressure |
| Vehicle mounted dry powder fire extinguisher | Every 3 years or when there is insufficient pressure |
| Industrial dry powder fire extinguisher | Every 2 years or when there is insufficient pressure |
6. Frequently Asked Questions
The following are frequently asked questions about charging dry powder fire extinguishers:
| question | Answer |
|---|---|
| 1. Can dry powder fire extinguishers be self-inflated? | It is not recommended to inflate by yourself, it should be done by professionals |
| 2. What should I do if the pressure gauge still shows insufficient after inflation? | Check the valve for leaks or contact a professional for repair |
| 3. How much does it cost to refill a dry powder fire extinguisher? | The cost varies by region and fire extinguisher model, usually between 50-200 yuan |
Through the above steps and precautions, you can ensure the normal use and safety of dry powder fire extinguishers. Regular inspection and charging are key to ensuring the effectiveness of your fire extinguisher.
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