Back pressure valve issue
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Two backpressure valves are installed in series at the outlet of a standard electric diaphragm metering pump. Is this necessary? A back pressure valve will do, won’t it? Also, if it is designed this way, then how should the back pressure valve be adjusted? For example, I need to adjust the pressure in front of the outlet backpressure valve to eight kilograms.
The purpose of setting a backpressure valve is to ensure sufficient pressure at the pump outlet? Can you take a picture of the scene? This makes it easier to understand!
If it’s not a highly specialized design, it’s best to first understand the principles of the manufacturing process. Designers generally do not make such basic mistakes. The design takes into account both the actual needs on site and the cost of materials for the equipment. For example, for valves with a short service life, to facilitate replacement, the first valve is usually set to an open position; it is then closed when a valve needs to be replaced, which ensures that there is no need to unload the material during the replacement process. For reference.
Is the outlet pressure very low? Such a setup might consist of a backpressure valve and a safety valve; they operate on the same principle but serve different purposes
What type of valve is a back pressure valve? I’ve never seen one.
Are the set pressures of the two backpressure valves the same? Will the two be put into use at the same time?
Used in series; of course, they are put into use at the same time
Backpressure valve pressure adjustment issue: Install a pressure gauge in front of the backpressure valve; while the pump is running, adjust the knob of the backpressure valve to increase the pressure – 8 kilograms as indicated by the pressure gauge is sufficient. Backpressure valve series connection issue: I haven’t encountered this situation before; usually, one is sufficient
This still needs to be understood from the designer’s perspective, to determine whether considerations have been given to potential damage to the back pressure valve caused by the properties of the medium, or to achieving a better pressure control effect； Where is the low-pressure head of the outlet connected to? It’s best to understand the system thoroughly before making a judgment.