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Posted for Scot Stambaugh <sstambaugh@qualcomm.com>:
Possibly a cleaner solution would be to use a flow restricter fitting in parallel with a check valve. The fluid would have full flow in the direction that the check valve was open and the reverse flow would close the check valve and flow through the restricter orifice. This way you don't have to do any sort of questionable modifications to a perfectly good (read expensive) check valve. Seems like it would be simple plumbing, although a bit more space required.
Just one man's view of the problem.
scot
Could you modify a check valve to flow fast in one direction and slow in the
other?
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