What is vacuum?

vacuum vent valve

[box style=”0″]Glossary “vacuum vent valve” Definition:
Controls the induction of fresh air into a vacuum system to prevent chemical decay of the vacuum diaphragm that can occur on contact with fuel. The valve should be mounted with ports pointed downward for fuel drainback.[/box]

vacuum testing

[box style=”0″]Glossary “vacuum testing” Definition:
Test on the intake manifold pressure to determine the condition of the pistion rings, valves, ignition timing and valve timing or to test for a restricted exhaust system.[/box]

vacuum suction cup

[box style=”0″]Glossary “vacuum suction cup” Definition:
Tool that uses a remote power source (separate vacuum pump or air compressor airflow) to produce a negative pressure (vacuum) in the spray gun cup. It also refers to a tool that is used pull out larger dent than can be done with just a suction cup.[/box]

vacuum regulator valve

[box style=”0″]Glossary “vacuum regulator valve” Definition:
Vacuum regulator which provides a constant output signal when the input level is greater than a preset level. At a lower input vacuum the output equals the input. Some systems use 3-port or 4-port valves to control the vacuum advance to the distributor.[/box]

vacuum reservoir

[box style=”0″]Glossary “vacuum reservoir” Definition:
Container used to hold a residual supply of vacuum. Vacuum stored in the reservoir is used during periods when the engine is not producing sufficient vacuum to operate certain components.[/box]