I’m looking for a proportional valve that can be connected in front of the pump, so that the pump can draw in two liquids in proportion. Thank you very much
Thread Content
I’m asking the experts in the group: is there a type of proportional valve that can be connected to the front end of a pump, allowing for the proportional mixing of two liquids? For example, there are two bottles, A and B. Bottle A contains water, while bottle B contains pure alcohol. Sometimes one wants to draw out a solution in a ratio of A:B of 70:30 ； Sometimes I want to draw out the solution in a ratio of A:B, 45:55; whenever I need to draw out a solution at a different ratio, I just need to adjust the ratio valve. For use in the laboratory, it’s better to have a smaller volume; the error in the proportion of solvent extracted needs to be kept within 1%, as the amount of liquid extracted each time is only a few hundred milliliters to a few thousand milliliters. Thank you very much
If 1% accuracy is required, dual-pump metering pumps may not provide sufficient precision; in that case, a Venturi dosing unit can be used. You can learn more about the HAIZHUO system. However, the dosage is usually fixed, and changing the ratio requires replacing the ratio head
This goal can be achieved using two experimental micro metering pumps.
https://bbs.hcbbs.com/forum.php?mod=redirect&goto=findpost&ptid=2858146&pid=22894042 When using a metering pump to deliver organic solvents, 1. If the accuracy required for the volume of the solution delivered is in milliliters, the tubing used must be relatively thin; and when the tubing is thin, it takes longer for the pump to deliver a certain volume of solvent. 2. If the organic solvents in the pipeline evaporate, is the air in the pipeline also considered as volume? ； I wonder what the accuracy of that fuel pump at the gas station is? However, when the amount increases from a few liters to dozens of liters, an error of a few milliliters can be ignored
When using a metering pump to deliver organic solvents, 1. if the accuracy of the volume of the solution delivered is in milliliters, the tubing used must be relatively thin; and when the tubing is thin, it takes longer for the pump to deliver a certain volume of solvent. 2. If the organic solvents in the pipeline evaporate, is the air in the pipeline also considered as volume? ； I wonder what the accuracy of that fuel pump at the gas station is? However, when the amount increases from a few liters to dozens of liters, an error of a few milliliters can be ignored
When using a metering pump to deliver organic solvents, 1. if the accuracy of the volume of the solution delivered is in milliliters, the tubing used must be relatively thin; and when the tubing is thin, it takes longer for the pump to deliver a certain volume of solvent. 2. If the organic solvents in the pipeline evaporate, is the air in the pipeline also considered as volume? ； I wonder what the accuracy of that fuel pump at the gas station is? However, when the amount increases from a few liters to dozens of liters, an error of a few milliliters can be ignored
Applications of micro metering pumps: Used for metering and transporting fluids with viscosities ranging from (1 to 100000 centipoise/0.001~100 Pa·s) that can tolerate mild corrosion. Advantages of micro metering pumps: pulse-free output, continuous operation, high precision, good repeatability, and high accuracy for precise metering of industrial fluids – it ensures a stable and repeatable flow rate under various conditions of temperature, viscosity, and pressure. The measurement accuracy is as high as 0.3%. Stable flow rate, no pulsation in output. BPB series: General chemical industry use. Material of the micro metering pump: General purpose; manufactured from 400 stainless steel. Flow rate of the micro metering pump: Displacement (milliliters per revolution): 0.066|0.16|0.297|0.584|1.168|1.752|2.92. Viscosity range of the micro metering pump: 1---100000 CPS. Rotation speed range of the micro metering pump: 10~180 revolutions per minute. Flow rate range: up to 0.2 ~526 milliliters per minute. Maximum inlet pressure of the micro metering pump: 500 PSI. Maximum outlet pressure: 1500 PSI. Pressure drop: 20 to 1500 PSI (depending on viscosity). Maximum operating temperature: 150 degrees. Sealing types for the micro metering pump: Mechanical seal, lip seal. Optional feature: Explosion-proof motor
If I am in the laboratory and need to prepare a mixed solvent by combining 700 ml of methanol with 300 ml of dichloromethane, and I use this micropump to take samples, will the entire sampling process take dozens of minutes? We are looking for a sampling pump that can operate at a fast speed, roughly on par with the speed at which we can pour the solvent by hand, and that also has high precision. Do you have any models you would recommend? Thank you very much!
If I am in the laboratory and need to prepare a mixed solvent by combining 700 ml of methanol with 300 ml of dichloromethane, and I use this micropump to take samples, will the entire sampling process take dozens of minutes? We are looking for a sampling pump that can operate at a fast speed, roughly on par with the speed at which we can pour the solvent by hand, and that also has high precision. Do you have any models you would recommend? Thank you very much!
If I am in the laboratory and need to prepare a mixed solvent by combining 700 ml of methanol with 300 ml of dichloromethane, and I use this micropump to take samples, will the entire sampling process take dozens of minutes? We are looking for a sampling pump that can operate at a fast speed, roughly on par with the speed at which we can pour the solvent by hand, and that also has high precision. Do you have any models you would recommend? Thank you very much!
If I am in the laboratory and need to prepare a mixed solvent by combining 700 ml of methanol with 300 ml of dichloromethane, and I use this micropump to take samples, will the entire sampling process take dozens of minutes? We are looking for a sampling pump that can operate at a fast speed, roughly on par with the speed at which we can pour the solvent by hand, and that also has high precision. Do you have any models you would recommend? Thank you very much!