How to suppress cast iron radiator
Recently, the topic of winter heating equipment maintenance has become a hot topic, especially the pressure testing method of cast iron radiators. The pressure test is a key step to ensure the safe operation of the heating system. This article will introduce the operation process, precautions and common problems in detail to help users complete the pressure test correctly.
1. The purpose and timing of stress testing
Pressure testing is mainly used to test the tightness and pressure-bearing capacity of cast iron radiators and piping systems. It is usually performed under the following conditions:
| scene | Recommended suppression time |
|---|---|
| New heating system | Test immediately after installation is complete |
| Pre-heating season | September-October every year |
| After system repair | Within 24 hours after repair |
2. Operation steps of pressure test
The following is the detailed operation process:
| steps | Operation content | Things to note |
|---|---|---|
| 1. Preparation | Close the heating water inlet valve and drain the system water. | Make sure the pressure gauge is reset to zero |
| 2. Connect the device | Connect the pressure pump to the exhaust valve of the heating system | Check the interface tightness |
| 3. Pressure test | Slowly pressurize to 1.5 times the working pressure (usually 0.8-1.2MPa) | Maintain pressure for 15 minutes |
| 4. Result judgment | Observe whether the pressure gauge drops ≤0.05MPa | Check that there are no leaks in each interface |
3. Common problems and solutions
Based on the recent discussion among netizens, the following high-frequency issues have been sorted out:
| question | Cause analysis | solution |
|---|---|---|
| Rapid pressure drop | The valve is not closed tightly/the radiator has holes | Check for leaks with soapy water and repair them |
| No change in pressure gauge | Pressure pump failure or improper connection | Replace device or reseal interface |
| local water seepage | Gasket aging | Replace rubber gasket |
4. Safety precautions
1.pressure control: It is strictly prohibited to exceed the maximum test pressure marked on the radiator (usually 2.5MPa)
2.personnel safety: Avoid being close to the interface during testing
3.Equipment selection: It is recommended to use a professional manual pressure pump. The pressure of electric equipment needs to be carefully controlled.
4.Legacy system: It is recommended to conduct a comprehensive inspection of radiators that have been used for more than 15 years.
5. Expert advice
According to the latest technical guidelines from the heating sector:
- Recommended for new residential buildingsdouble suppression method(Once after installation, once after decoration is completed)
- The water temperature for pressure testing should be maintained between 5-30℃
- The system holding time can be extended to 30 minutes to improve detection accuracy
Through standardized pressure testing, water leakage accidents during the heating season can be effectively prevented. If there are difficulties during operation, it is recommended to contact professional HVAC personnel to ensure safe heating in winter.
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