Technical Information/Glossary of Terms

Volume of air taken in by the ejector. The maximum value is the volume of air taken in without having anything connected to the vacuum port.

The maximum value of the vacuum pressure generated by the ejector.

The compressed volume of air consumed by the ejector.

The optimal supply pressure for operating the ejector.

The relationship between the vacuum pressure and the suction flow rate when the supply pressure to the ejector has been changed.

The relationship between the vacuum pressure and the suction flow rate with the standard supply pressure supplied to the ejector.

Pressure switch for verifying the adsorption of a workpiece.

Switch, based on an air pressure bridge, for verifying the adsorption of a workpiece. It is used when the adsorption pad and the nozzle are extremely small.

Valve for supplying compressed air to the ejector.

Valve for supplying positive pressure or air for breaking the vacuum state of the adsorption pad.

Valve for adjusting the volume of air for breaking the vacuum.

Pressure for breaking the vacuum.

Pressure for operating the ejector valve.

The action of breaking the vacuum using externally supplied air instead of using the ejector unit.

Port for generating vacuum.

Port for exhausting air consumed by the ejector, and air taken in from the vacuum port.

Port for supplying air to the ejector.

Pressure inside the exhaust port.

The entry of air into the vacuum passage, such as from an area between a workpiece and a pad, or between a fitting and a tube. The vacuum pressure decreases when leakage occurs.

The time from the application of the rated voltage to the supply valve or release valve,until V port pressure reaches the specified pressure.

The suction flow rate by the ejector or pump for calculating the response speed. It is 1/2 to 1/3 of the maximum suction flow rate.

A low electrical resistance pad for electrostatic prevention measure.

Any pressure below the atmospheric pressure. When the atmospheric pressure is used as a reference, the pressure is presented by –kPa (G), and when the absolute pressure is used as a reference, the pressure is represented by kPa (abs). When referencing a piece of vacuum equipment such as an ejector, the pressure is generally represented by –kPa.

A unit for generating vacuum by discharging the compressed air from a nozzle at a high speed, based on the phenomenon in which the pressure is reduced when the air around the nozzle is sucked.

Vacuum filter provided in the vacuum passage for preventing the dust intrusion into the ejector, vacuum pump, or peripheral equipment.