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unit valve

· January 15, 2016 ·

Type of pneumatic stack construction with individually-removable valve units. Each valve and pouch (and sometimes pneumatic) is contained within one unit, making servicing of defective notes easier when factory replacement units were available. Today, restoring a unit valve pneumatic stack frequently takes longer than restoring a stack made in one big chest, as there are many parts to break open for restoration instead of one big unit that usually comes apart with screws.

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