Selection of steam pressure and steam pressure reducing valve (three)

2023 02/10

The boiler operates at the design pressure, and the steam is conveyed and distributed at the most economical pressure and flow rate. The heat exchange pressure of steam needs to be referenced according to the working pressure of the heat exchanger and the back pressure of the condensate water system.

Set a pressure reducing and stabilizing valve in front of the equipment, and a safety valve behind the pressure reducing valve. The upper deviation of the set pressure of the pressure reducing valve should be lower than the set pressure of the safety valve, and the take-off pressure set by the safety valve should be lower than that of the heat exchanger. The highest safety pressure of the device to ensure the stability and reliability of the steam system.

For heat exchangers with temperature control, the design steam pressure of the heat exchanger is different from the steam pressure in front of the control valve. On the one hand, the control valve itself has a pressure drop. On the other hand, the actual pressure in the heat exchanger will change with The adjustment of the control valve and the change of the heat output rate of the heat exchanger vary.

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