Before the pump, how far can the flowmeter be installed?
As for the distance, if it is a gear type, it can be a zero distance and has no requirement for the installation posture.
Under normal circumstances, electromagnetic flowmeter is not allowed to install in front of the pump, because the front of the pump will produce a certain negative pressure, electromagnetic flowmeter is not negative pressure. Try to install the electromagnetic flowmeter behind the pump. The distance depends on how large your pipe is. In theory, the flowmeter has a certain requirement for the straight section before and after, at least 10 times as long as the straight pipe in front of the flowmeter. The straight pipe behind the flowmeter is 5 times as big as the caliber of the flowmeter. The distance between straight pipes is as far as possible. If the vortex flowmeter, it can be installed in front of the pump, but also to ensure that the straight section of the front and rear.
Look, what kind of flowmeter do you have?. If it's volumetric type. It is not recommended to be installed in front of the pump. The main reason is that:1) the inlet section of the pump will form negative pressure, which will lead to cavitation;2) the volumetric efficiency of the pump varies with the inlet and outlet pressure differential, and the front flow meter readings do not agree with the actual outflow;
