Before whacking the bolt on the puller, once you have it tight then try a light tap on the side of the handle you are tryin' to remove... BTW, rather than a big hammer, which might damage your valve assembly, use a small one first... I am confident that this handle is going to come right off without any hammers...

BTW, do you have an assortment of washers to go back in the valve??? You can usually find a small package with about 10-12 in it for cheap...

B~