Burkert 6011 is ok and good for our application, and there are more different solenoids you can choose from.
Don't want to limit your choice to burkert 6011 only.
There are more, virtually all the major industrial solenoid valve producers have the solenoid valves that fall in the same category as burkert 6011.
As I mentioned in another thread, SMC, Parker/Honeywell/Paul, Mac, Numatics/ASCO, clippard, humprey/konagei, and more brands, do have solenoid valves that are in the same category as burkert 6011.
And there are low flow, low power consumption type miniature solenoids exist as well, clippard mouse solenoid is one of them.