Finally! I searched the half the world (ok, maybe a little less) and finally found a affordable valve unit with 1/4" NPT threads that fits snugly on the vacuum press project. This brass body valve has a Teflon seat and NBR o-ring so you can be sure it will last.
This valve is used on the main reservoir that goes to the vacuum line. By adding this valve, you can "pre-charge" your system with vacuum pressure so you get a slightly faster initial pull down in the vacuum bag. The valve can also be added to the lock-on vacuum connector so the vacuum pressure can be turned on or off right at the vacuum bag.
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