How to choose a pump for import under negative pressure conditions
Thread Content
The medium is water, with an inlet pressure of -0.088 MPa(G), a head of 40 meters, a temperature of 60°C, and a flow rate of 1.5 kg per hour. Under such operating conditions, what type of pump should be chosen to meet the design requirements? Thank you!
Increase the inlet pressure by using a water seal!
Could you be more specific? Is it feasible for me to use a metering pump?
Learn about filter pump – it can extract liquids from a negative pressure environment
Thanks for the reminder! I asked the manufacturer of the filtrate pump, but it’s not possible to achieve such a low flow rate.
Under similar operating conditions, with a flow rate of 300 kg and a head of 30 m, a centrifugal pump has been selected for trial use
Such high a temperature, such low a flow rate – are you sure about these conditions?
Under basically the same operating conditions, a magnetic pump is being used, and it’s performing well so far
1. Get in touch with Jiangsu Wuxin Pump Industry; they have a magnetic pump that is resistant to negative pressure, and it performs very well. 2. Ordinary pumps can also be used; some adjustments need to be made in the pipeline design.
Is the traffic that low? A plunger metering pump, I guess! With self-priming. Increase the liquid level entering the pump to eliminate some of the negative pressure
Positive displacement pumps are recommended, such as diaphragm, piston, gear, etc