Setting of the red line on the outlet pressure gauge of the centrifugal pump
Thread Content
To standardize the position of the red line on pressure gauges, the red line on the pressure gauge for containers should be set according to the pressure setting of the safety valve. But how is the position of the red line on the pressure gauge at the pump outlet determined? Follow Yang Cheng’s shutdown point? Is the pump performance curve based on the medium designed for the pump or water? Could the experts help clarify this?
This indicator serves as a tool to assist inspectors in quickly and accurately assessing the operating condition of the equipment; during the operation of the unit, the allowable range of deviation for the outlet pressure of the centrifugal pump is set by this indicator. For example, when the pressure of the pump falls below a certain value, cavitation occurs in the centrifugal pump; this value serves as the lower limit marker ； When the pump pressure exceeds a certain value, the flow rate at the pump outlet is too low. So of course, it should be based on the actual operating medium.
It’s fine for leadership to push for standardization. The problem is that you don’t understand the purpose of setting this line. 1. Set according to the normal production process values ； 2. The “cut-off point” is both the rated pressure of the pump and can also be regarded as the head ； 3. The pump is yours; if you don’t know what the medium inside is, it’s advisable to consult your technical staff, as they will definitely know. As for the medium being water, it should of course be called a “water pump,” since the medium used is necessarily water. Otherwise, it could be an oil pump, an acid pump, or other liquid pumps. Mock language, for reference only.
I know the pump medium. How should it be set according to the production process values? By how much should it be higher than normal pressure?
In the case of a centrifugal pump, the so-called \"cut-off point\" represents the maximum head (pressure); can you increase its pressure any further? I don’t understand. If this is not the pressure during normal operation, unless your pump is operating under a severely overloaded condition. Note: The topic is based on the pressure before the valve of the water pump as a reference point. However, the system pressure downstream of the valve also uses this reference point as the normal operating parameter.