Could you share how your factory operates the pumps?
Thread Content
1. How do you operate a plunger pump with variable frequency? How large should the outlet setting be when the pump just starts running? Apply pressure? 2. Is the outlet valve of the standby pump in a tandem primary/standby pump system always open? As I recall, most companies are. 3. Continuing with the second question, if the pump is started on-site, do you follow the normal procedure for starting a pump: close the outlet valve – start the pump – open the valve? ； Should I just start it directly?
1. Plunger pumps require pressure to be built up; the bypass circuit is used to increase the pressure. 2. Generally, for pumps that are not critical on-site, they are started according to the normal starting procedures. However, for some critical, larger pumps, the outlet valves are kept open; otherwise, in the event of a problem, manual intervention would be too slow. However, some of the key pump outlet valves can now be set as electric valves, allowing for a rapid response in case of any problems.
Plunger pumps belong to positive displacement pumps, and the circulation circuit must be turned on first. The standby pump should be an electric remote valve, usually kept closed.
As mentioned above regarding piston pumps, let me talk about the primary and standby pumps (centrifugal pumps, magnetic drive pumps). The outlet of the standby pump is fully closed while its inlet is fully open. To start the standby pump, first turn it by hand; generally, there is no need to fill the pump (since the inlet is already open). After starting the standby pump, open its outlet. Then close the main pump outlet and stop the pump.
I don’t think it’s necessary to add an outlet valve; it’s never closed, so what’s the point of having one that can be opened?
The operation of the outlet valve should be determined based on the conditions on site, whether control is to be done remotely or locally, the type of pump, the number of pipelines at the pump outlet, and so on. Personally, I think the pump outlet should be closed to prevent accidental operations and to ensure proper *habits, etc. :)