How to set the pressure gauge for a screw pump?
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I would like to ask the experts: where is the most suitable location to install the pressure gauge on a screw pump? And what are the best ways to clean a clogged pressure gauge tubing? The medium transported is crude oil.
The pressure gauge is definitely installed at the outlet; generally, the pressure gauge at the outlet of pumps used for transporting crude oil comes with an isolation sleeve to prevent the oil from solidifying and blocking the pipelines
Reply to 2# lyyrong: Hello, what is the principle behind the isolation package you mentioned? What is the internal structure like? Thanks
It must be installed at the outlet; a diaphragm pressure gauge will suffice.
A diaphragm pressure gauge is a type of pressure gauge that uses a diaphragm to separate the medium being measured from the sensitive elements. When the pressure P of the medium acts on the diaphragm, it causes the diaphragm to deform, thereby compressing the sealing fluid in the pressure gauge’s measuring system and creating a pressure of P-△P. When the stiffness of the diaphragm is low enough, △P is also small, and the pressure generated by the pressure measuring system of the pressure gauge is close to the pressure of the medium being measured.
Thank you, sir; what you said has been extremely beneficial to me.
Xiaolong... The mass transfer fluid inside the diaphragm pressure gauge is “silicone oil””
Our company’s triple-screw pumps are also equipped with pressure gauges at the inlet. Can anyone tell me what their function is?
Three-screw pumps also have requirements regarding the inlet pressure of the pump, especially due to the influence of vacuum levels; therefore, a pressure gauge is installed at the pump’s inlet to measure that inlet pressure. The outlet pressure is generally measured at the outlet of the pump, downstream of the check valve.
Under normal circumstances, pressure gauges should be installed at both the inlet and outlet of the pump. However, the import pressure should not be too high; based on our experience, it generally should not exceed 0.2 MPa. The method to prevent short-circuiting and blockage of pressure gauges is, as mentioned above, to install an isolation tank filled with silicone oil. The method to prevent freezing is to wrap an electric heating tape around the isolation tank.