The Realflow jobtype is to offload a Realflow simulation from Realflow to a single machine on the renderfarm. Since simulations typically need information from the previous frame(s), it it advised to render it on a single machine.
We are not specifically familiar with the realflow geometry simulation details from within maya. However, for your work, you may want to consider running Maya BatchRender jobtype and or enabling any simulation caches. If the simulation can be run first and cached to disk, then it typically makes it easier to render across multiple machines.
As a last resort, one can render the entire animation on a single machine over the entire frame range with Maya BatchRender (though Qube or outside of Qube).