Needs for my application are as follows. 2-way,It must also be able to flow roughly 2.3 Liters a minute. latchable,Must be able to complete 40+ cycles per second Temperatures up to 200*F,Pressures of 3000 psi.for high speed valves. Back when I worked for a Different valve company, we sold a lot of hydraulically operated valves to NASA. The controlling valve on them was made by Moog. We got into some valves where NASA wanted frequencies like you are asking.....friction melted the packing. OTOH, Clippard makes high-cycle life solenoid valves that will cycle pretty quickly. They're small, but you could parallel a few for more capacity.

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