Common failures of pressure regulating fire hydrant landing valves mainly include the following:
1. Failure of pressure regulation
It may be that the internal pressure regulating device is damaged, such as spring aging or deformation, and it cannot provide normal pressure regulation.
For example, in actual applications, it may happen that no matter how it is adjusted, the water outlet pressure is always too high or too low.
2. Leakage problem
The valve stem is not tightly sealed, causing water to leak from the valve stem.
There are cracks or sand holes in the valve body itself, causing water leakage.
For example, water can be clearly seen seeping out around the fire hydrant, and even water accumulation.
3. Valve core stuck
Impurities in the water enter the valve, causing the valve core to move obstructed.
The wear or corrosion of the valve core prevents it from moving smoothly.
This may manifest as an inability to open or close the valve normally, affecting the use of the fire hydrant.
4. Inflexible operation
Due to long-term disuse or lack of maintenance, the rotating parts are rusted or stuck by foreign objects.
For example, when the fire hydrant needs to be opened in an emergency, the valve is difficult to turn.
5. Appearance damage
Due to external impact or harsh environment, the appearance of the fire hydrant landing valve may be deformed or damaged.
These faults may affect the normal use of the pressure regulating fire hydrant landing valve, thereby adversely affecting firefighting work. Therefore, regular inspection and maintenance are very necessary.