Structural analysis of NORGREN filter pressure reducing valve

Structural analysis of NORGREN filter pressure reducing valve

A pressure reducing valve is a type of valve that adjusts the flow rate of the medium by controlling the opening of the opening and closing components inside the valve body, reducing the pressure of the medium. At the same time, the opening of the opening and closing components is adjusted by the pressure behind the valve to maintain the pressure within a certain range. Cooling water is sprayed into the valve body or behind the valve to lower the temperature of the medium. This type of valve is called a pressure reducing and temperature reducing valve.

It refers to the characteristic of output pressure fluctuations caused by input pressure fluctuations when the flow rate g is constant. The smaller the output pressure fluctuation, the better the characteristics of the pressure reducing valve. The output pressure must be lower than the input pressure - a constant value in order to remain largely unchanged with changes in input pressure.

The pressure reducing valve relies on the local resistance of the flow channel inside the valve to reduce water pressure. The range of water pressure reduction is automatically adjusted by the inlet and outlet water pressure difference on both sides of the diaphragm or piston connected to the valve disc. The principle of fixed ratio pressure reduction is to use the water pressure ratio control of the floating piston in the valve body, and the pressure reduction ratio at the inlet and outlet ends is inversely proportional to the area ratio of the piston on the inlet and outlet sides. This pressure reducing valve works smoothly without vibration; There is no spring inside the valve body, so there is no concern of spring corrosion or metal fatigue failure; Good sealing performance without leakage, thus reducing both dynamic pressure (when water flows) and static pressure (when flow rate is 0); Especially when reducing pressure without affecting water flow.

(3) Flow characteristics: It refers to the persistence of input pressure timing and output pressure changing with the variation of output flow g. When the flow rate g changes, the smaller the change in output pressure, the better. The lower the output pressure, the smaller the fluctuation with the change of output flow rate.

A pressure reducing valve is a valve that adjusts the inlet pressure to a desired outlet pressure, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance. By changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses and achieving the purpose of pressure reduction. Then, relying on the adjustment of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve remains constant within a certain error range.

R72G-2AK-RFG Norcrown

602112128 Norcrown ball valve

602112138 Norcrown ball valve

B72G-2AK-QD1-RMN

PRA/802063/M/350

TQA/8100/00

QM/192080/00

QM/192080/N2/00

6313MR1000-02400-01

VP2316BE461MB200

TRA/802125/M/330

8021950 Norcrown

B72G-2AS-000014 Norcrown

Structural analysis of NORGREN filter pressure reducing valve