I have a few questions regarding metering pumps-----------Urgent, waiting for answers.

The outlet pipelines of the metering pumps can share one pipeline. A damper is generally installed at the outlet of diaphragm metering pumps with high flow rates, while it may not be necessary for those with low flow rates. Dampers are generally supplied as complete pump sets, and their calculation requires the assistance of a pump manufacturer. The damper is installed in front of the valve on the pump outlet pipe. Metering pumps generally have a connecting line at the inlet and outlet.

Thank you very much for your answer. Then, can the Union line be placed in front of the inlet valve and behind the outlet valve?

Also, is an import/export connection line necessary?

This post was last edited by ylb913 on 2016-10-22 at 16:19. Can the outlet pipelines of metering pumps share the same pipeline? ——This is true for both the main and backup units; of course, the outlet pipe for those that are used more frequently needs to be thick enough. Is it necessary to install a damper on a diaphragm metering pump? ——I’ve only seen them in other factories; we don’t have any such pumps here. Are the dampers provided by the manufacturer as part of a complete set? ——It’s just a small fitting; you can buy it on your own, or it’s definitely no problem to have the pump manufacturer include it when delivering the pump. Where exactly is it to be installed? ——There isn’t much difference in installing it behind the outlet valve of the shallow-flow outlet valve. The outlet valve needs to be opened before starting the plunger pump. Additionally, the damper may also require repair or replacement. If there is a valve at its inlet, then it doesn’t matter; but if there is no valve at the inlet, it should still be installed in front of the valve. Are bypass valves needed at the inlet and outlet of the metering pump? ——It is still more convenient to use the pipeline for purging when starting up or shutting down the equipment ； Or sometimes, the pump needs to be pumped in reverse when necessary. The location across the line is the same as that of a centrifugal pump, usually outside the inlet and outlet valves of the pump.

Can the outlet pipelines of metering pumps share the same pipeline? They can be shared, meaning that the two pumps can use the same outlet pipe, allowing one to be in use while the other serves as a backup. Is it necessary to install a damper on diaphragm metering pumps? Should dampers be added? Are they provided as part of the complete set by the manufacturer? The damper manufacturers provide complete sets; where exactly should they be installed? Installed between the pump outlet and the common pipeline – are bypass valves required at the inlet and outlet of the metering pump? It should be added; metering pumps are generally plunger pumps. If the outlet pipe is narrowed, the excess flow will have to return through the inlet pipeline, otherwise it will damage the metering pump

Can the outlet pipelines of metering pumps share the same pipeline? If there is a backup pump, it can be used. Is it necessary to install a damper on a diaphragm metering pump? Should dampers be added? Are they provided as part of the complete set by the manufacturer? It can be purchased separately, and pump manufacturers can also supply it. Where exactly should it be installed? Installed at the pump outlet: Are bypass valves required at the inlet and outlet of the metering pump? It should be added, reflux

The damper has an average performance; I remember it being quite expensive； If you want to save money, get a small buffer tank; it’s also possible to use a small pipe with an outlet pipe that gets thicker first and then thinner again ；

Can the outlet pipelines of metering pumps share the same pipeline? Reply: Yes, many pumps come with several nozzles available in the same province. Is it necessary to install a damper on diaphragm metering pumps? Reply: It’s not necessary; generally it can be omitted. If it is export equipment and operates under negative pressure, then it must be added, as measuring in such a case would be meaningless. Are the dampers provided by the manufacturer as part of a complete set? Reply: Generally, it can be supplied as a complete set. Where exactly will it be installed? Reply: It is installed on the outlet pipeline; for specific details, refer to the metering pump installation drawings. Are bypass valves needed at the inlet and outlet of the metering pump? Reply: It depends on what role the secondary circuit is supposed to play; an outlet plus a return line is quite common.