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Precautions for installation and use of positive displacement flow meter (2)

by:Sincerity Group     2023-01-15
Abstract: Precautions for installation and use of positive displacement flowmeters (2) Information is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 2. Operation method of the flowmeter 2.1 Corresponding configuration The flowmeter must be installed with valve 1 before the meter, valve 2 behind the meter (flow regulating valve) and control switch valve 3 (also installed behind the flowmeter), as shown in the figure. The front valve 1 and the back valve 2 can be general mechanical gate valves or ball valves. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the installation and use precautions of positive displacement flowmeters (2) The details of the article. 2. Operation method of the flowmeter 2.1 Corresponding configuration The flowmeter must be installed with valve 1 before the meter, valve 2 behind the meter (flow regulating valve) and control switch valve 3 (also installed behind the flowmeter), as shown in the figure. The front valve 1 and the back valve 2 can be general mechanical gate valves or ball valves, etc., and the control switch valve 3 can also be a solenoid valve or other valve. (A check valve should be installed after the pump.) 2.2 Start running (all valves are closed at this time) First open the oil pump - slowly open the front valve 1 of the meter (to ensure that the flow meter enters the oil) - open the control switch valve 3 ——Finally open the meter after valve 2 is the flow control valve (the flow can be adjusted to the required flow value at this time). At this point, the flowmeter starts to operate normally. 2.3 Stop running is just the opposite of starting running, that is, first close the control switch valve 3 - close the front valve 1 of the meter - and finally close the oil pump. At this time, it is not necessary to close the regulating flow valve 2, so as to ensure that when the flowmeter starts to run in the next cycle, the flow rate still guarantees the original constant flow rate. Warning: When running for the first time, you must run 50L at a low speed (<60L/min), and then accelerate to the normal speed, otherwise the flowmeter will be easily damaged. 3. Common fault causes and troubleshooting methods of positive displacement flowmeters Fault phenomenon Causes Measures Remarks The rotor does not rotate 1. There are sundries in the pipeline 2. The measured liquid contains a lot of sundries. Damaged filter. Impurities get into the watch and the gears get stuck. Disassemble and wash instruments and pipes, repair filters. Sealed coupling leaking Seal packing worn or lack of seal oil. Tighten the gland or replace the packing and add sealing oil. The pointer rotates erratically, or stops and goes. Pointer, washer……Wait until there is looseness or the rotating parts are not flexible. Re-tighten to eliminate inflexibility. The small flow error is too negative. The oval gear collides with the wall of the metering box, the bearing is worn, or the wall of the metering box is deformed. Replace the bearing, repair the wall of the metering box and the gear at the changing tooth to make the rotation flexible and ensure the required clearance. Verify after repair. Excessive change in error. Fluid has large pulsation or contains gas. Reduce pulsation or install a gas separator The error is too large, but the difference between the maximum and minimum errors does not exceed 1% The service life is exceeded, or the clearance changes after maintenance. Re-calibration and adjustment The maximum and minimum error corresponding to the 0.2-level flowmeter does not exceed 0.4%. The above is the entire content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for installation and use of volumetric flow meter (2)'
mass flow meter is an inevitable and critical part of being a manufacturer, and it's more complicated than just manufacturing products and serving customers.
To learn more about mass flow meter, give us a call at Beijing Sincerity Automatic Equipment Co., Ltd or visit us online by going to Sincerity Flow Meter.
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