TVIS and TVSV
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TVIS assembly | TVIS split. Note the closed butterfly valves on the left and the removed ones on the right | The two halves can be separated and the supporting bar and "flaps" removed | TVIS actuator attached to the bar that turns the butterfly valves |
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Rear view of engine showing the TVSV and TVIS assemblies | Close up of the TVIS and TVSV assembly, taken from an ST185 1 - Vacuum tank to TVIS VSV |