Generally, which pumps require to be able to be started from a DCS?

It is ideal to be able to start everything from the DCS, but the conditions under which starting from the DCS is allowed need to be carefully defined. Additionally, it is necessary to check whether the outlet valves of the pumps are fully open and in a ready state, as well as to ensure that the motors designed and purchased can handle the high currents generated during startup

Generally, both centrifugal pumps and positive displacement pumps are switched on-site. I haven’t encountered a situation where it’s necessary to start the pump from the DCS yet

That’s indeed the case, so I want to see what special types of pumps have a DCS-driven start in addition to an on-site start

Variable-frequency pumps can actually be controlled remotely, without the need to open outlet valves.

In terms of automation, basically all products on the pipeline need to be under automated control; if even one link is not automated, it will cause problems for the automation system. Generally, when I design an automatic control scheme, I basically include automatic control; after all, there are also operation panels on site that allow for manual switching.

Pumps can all be equipped with DCS remote control, provided that the process requires it; this can be achieved by installing remote control instruments, check valves, cooling systems, and other such facilities

Things like backup pumps that start and stop based on liquid level, those used for intermittent production, and those that tend to break down – it depends on the needs

Generally, the auxiliary oil pump of a compressor is equipped with an auto-start function

All the pumps at the site were originally started via DCS; even when someone was on site, they would use a walkie-talkie to instruct the control room to start them

When using DCS or other systems to achieve remote start/stop, the key factor is not whether such a system is capable of doing so, but rather other considerations. First, there are the startup conditions of the pump itself; the inlet and outlet valves need to be controlled remotely. For larger pumps, it is necessary to manually rotate the pump before starting it. In some processes, it is also required to open the return valve. All these aspects need to be addressed in accordance with the process requirements, and they cannot be resolved simply by operating a start/stop control switch. Second is the problem that arises as a result: there are so many supporting facilities that need to be controlled, and all of them require investment. It is necessary to consider the cost-effectiveness of implementing them. In short, there is no issue with self-control itself; let’s focus first on matters outside the system