How to regulate pressure with a pressure reducing valve

We often see pressure reducing valves in the water supply system, but many people do not know the detailed usage. So how can pressure reducing valves regulate pressure?
1, How can a pressure reducing valve regulate pressure
Before actual operation, close the lower valve first, and then open the black cover above the pressure reducing valve. 1. If you want the pressure to increase, simply rotate the valve clockwise. 2. To reduce the pressure at the outlet, rotate the valve counterclockwise, adjust the pressure value of the valve, and finally open the valve below.
2, What should be noted when using a pressure reducing valve
In order to ensure that the pressure reducing valve can play an appropriate role in the water supply system, we also need to follow the corresponding regulations and guidelines when using it. The following are some precautions when using it.
1. Before use, check if the pressure reducing valve is installed in front of the alarm valve group inlet. If the pressure reducing valve is equipped with more than two alarm valve groups, a backup pressure reducing valve should also be installed. In addition, it is necessary to pay attention to whether there is a pressure test drainage valve installed behind the pressure reducing valve to ensure its normal operation.
2. If there are impurities in the water during use, the valve core and needle of the pressure reducing valve are easily blocked, causing the valve to malfunction. To avoid this situation, it is necessary to equip the pressure reducing valve with a high-quality filtering device, which can remove impurities from the water.
3. Pressure reducing valve is a type of energy dissipation device, which consumes a lot of energy. In order to ensure sufficient water supply in case of fire, there are corresponding regulations for the pressure at the outlet of the water pressure valve. It is necessary to ensure that the outlet dynamic pressure cannot be lower than 6.5% of the set negative value.