The Doldr series branch pressure reducing valve for inlet water is a valve device, which is mainly used to control the water pressure in the branch pipe to maintain the stability of the water supply system and prevent the water pressure from being too high to cause damage to the pipeline and equipment.
The main function of the branch pressure reducing valve for inlet water is to reduce pressure and distribute the water supply. In high-rise buildings, due to the high floor height and large water supply pressure, the use of branch pressure reducing valves can make the water supply pressure distribution more balanced, avoid overpressure at some water supply points, and optimize the water supply partition of high-rise buildings. In the fire protection system, the branch pressure reducing valve can be used instead of the zonal frequency modulation variable speed water pump to protect all faucets and other water appliances.
In addition, the branch pressure reducing valve for imported water also has the characteristics of energy saving and environmental protection. By adjusting the water pressure in the branch pipe, water resources can be effectively saved and energy waste can be reduced. At the same time, the rational use of branch pressure reducing valves can reduce the wear and tear of pipelines and equipment, prolong service life, and reduce maintenance costs.
The branch pressure reducing valve for inlet water is mainly composed of a valve, a diaphragm or piston, a spring, and an adjusting bolt. Its working principle is as follows: when the water enters the valve, a certain pressure is formed at the inlet of the valve, which causes the diaphragm or piston to deform, thereby driving the spring to produce compression or tension action. When the compression or tension action of the spring reaches a certain value, the opening of the valve is adjusted by adjusting the bolt, thus changing the flow and pressure of the water.
The parameters of the branch pressure reducing valve for inlet water mainly include:
DN: DN15 DN50 (1 2"~2"）。
Nominal pressure: 10mpa~2.5mpa。
Applicable temperature: -0 t 80.
Applicable medium: water, gas, oil.
The branch pressure reducing valve for imported water is mainly used in various building water supply systems, fire protection systems, air conditioning systems, heating systems, etc., with the functions of pressure reduction and water supply distribution. In high-rise buildings, branch pressure reducing valves can make the water supply pressure distribution more evenly and avoid overpressure at some water points. In addition, in the fire water supply system, the branch pressure reducing valve can be used instead of the zone pump to protect all faucets and other water appliances.
The installation and precautions of the branch pressure reducing valve for inlet water are as follows:
The installation of the pressure reducing valve should be carried out after the pressure test and flushing of the water supply pipe network are qualified, and the pressure test and flushing records of the pipeline should be checked.
Before the installation of the pressure reducing valve, it should be checked that its specifications and models should be consistent with the design, the external control pipeline and the connecting parts of the guide valve should not be loose, the appearance should be free of mechanical damage, and the foreign matter in the pressure reducing valve should be removed.
The direction of the water flow of the pressure reducing valve should be consistent with the flow of the water supply network.
Filters should be installed on the inlet side, and control valves should be installed in front and behind them.
Adjustable pressure reducing valves should be installed horizontally with the bonnet facing upwards.
Proportional pressure reducing valves should be installed verticallyWhen installed horizontally, the orifice of the single breathing port pressure reducing valve should be downward, and the orifice of the double breathing port pressure reducing valve should be in a horizontal position.
When installing a pressure reducing valve without its own pressure gauge, the pressure gauge should be installed adjacent to the front and rear of it.
In order to prevent overpressure behind the valve, a pressure reducing valve should be installed not less than 4m away from the valve outlet.
If a pressure reducing valve needs to be installed in a hot water system, a check valve should be installed between the pressure reducing valve and the expansion tank.
The installation position of the pressure reducing valve should be easy to operate and maintain, generally installed on the horizontal pipeline, and the direction of the arrow should be consistent with the direction of fluid flow when installed upright.
A shut-off valve should be set before and after the pressure reducing valve to facilitate maintenance and replacement.
During use, the appearance and function of the pressure reducing valve should be checked regularly to ensure that it is working properly.
When deactivated or repaired, the shut-off valve before and after the pressure reducing valve should be closed to prevent damage to the pressure reducing valve caused by water hammer or other abnormal conditions.
In practice, it is necessary to select the appropriate branch pressure reducing valve according to the specific water supply system and equipment requirements. For example, the right model, size, and material need to be selected to ensure that the branch regulator can meet the pressure, flow, and temperature requirements of the system. At the same time, it is necessary to regularly check and maintain the branch pressure reducing valve during use to ensure its normal operation and prolong its service life.