Pressure Regulator Valve also named pressure reducing valve. It is through changing the throttling area, so that the velocity and the kinetic energy of the fluid change, resulting in a different pressure loss, so as to achieve the goal of pressure reduction. And depending on the energy control and regulation system of the medium itself, after reducing the pressure, the pressure fluctuation is balanced with the spring force, and after reducing the pressure, the pressure is kept constant in a certain error range.
Basic Performance Of Pressure Regulator Valve
(1) Adjustable Range
It refers to the pressure relief valve output pressure P2 adjustable range, in this range to achieve the required precision. The range of regulating pressure is mainly related to the stiffness of regulating spring.
(2) Pressure Characteristics
It refers to the characteristics of output pressure fluctuation caused by input pressure fluctuation when flow rate G is constant. The smaller the fluctuation of the output pressure, the better the performance of the pressure reducing valve. The output pressure must be lower than the input pressure-the setting value does not change with the input pressure basically.
(3) Flow Characteristics
It refers to the input pressure-timing, the output pressure with the output flow g changes in the persistence. When the flow rate G changes, the smaller the change of the output pressure, the better. Generally, the lower the output pressure is, the less it fluctuates with the output flow.
Selection Principle Of Pressure Regulator Valve
1. The fluctuation of inlet pressure of pressure reducing valve should be controlled at 80% ~ 105% of the given value of inlet pressure, if it exceeds this range, the performance of pressure reducing valve will be affected.
2. Usually, after reducing, the pressure PC should be less than 0.5 times of the pressure before reducing, that is, PC<0.5 P1. Each gear spring of the relief valve is only suitable for a certain range of outlet pressure, beyond which the spring should be replaced.
3. In the medium working temperature is relatively high occasions, the general choice of pilot piston-type pressure reducing valve or pilot bellows pressure reducing valve.
4. Medium for air or water (liquid) occasions, generally suitable for the direct action of the film-type Pressure Relief Valve or pilot film-type pressure relief valve.
5. Medium for the steam occasions, the appropriate choice of pilot Piston or pilot bellows pressure relief valve.
6. For ease of operation, adjustment and maintenance, pressure relief valves should generally be installed in the horizontal pipeline.
Selection Of Pressure Regulator Valve
1. According to the requirements to choose the type of pressure relief valve and pressure precision, and then according to the maximum output flow required to choose its size. When determining the air source pressure of the valve, the maximum output pressure shall be greater than 0.1 MPA. Pressure Reducing Valve
2. Generally installed in the water after the air filter, oil mist or regulator before, and do not pay attention to its inlet and outlet, valve should be used to relax the knob, to avoid the diaphragm damage and affect the valve performance.
Post time: Jul-28-2021