Orion® KHA Series High Vacuum Dry Pump

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Safe Design, Low Operating Noise, Long Life. Environmentally Friendly Pump for the Next Generation

KHA Series

Flow Rate
65 to 400 L/min (60 Hz)
Continued operation possible at ultimate pressure (8 kPa or lower).
High operational degree of vacuum, optimal for automation (installation, etc.) of small works such as electronic components.


Model KHA 100-301-G1 200-301A-G1 400-301A-G1 750-301B-G1
Designed Exhaust Flow Rate (50/60 Hz) ※1 L/min 55/65 120/145 220/260 330/400
Ultimate Pressure ※2 kPa [abs] or lower 8
Piping Connection Size   Rc 1/4 Rc 3/8
Voltage (50/60 Hz) V Three-phase 200 / Three-phase 200, 220
Standard Motor Current Rating (50/60 Hz) A 0.69/0.6, 0.62 1.56/1.37, 1.36 2.29/2.08, 1.99 3.8/3.4, 3.4
Operating Noise Level (50/60 Hz) ※3 dB 60/61 61/62 63/66 67/70
Built-In Motor kW 0.1 0.2 0.4 0.75
Mass kg 11 13 21 38


※1 Designed Pumping Capacity: Theoretical value based on volume. Refer to performance data for actual flow rate.

※2 Pump can be continuously operated at the maximum attainable vacuum.

※3 Actual operating noise measured on a new pump with the ORION recommended motor. Operating noise level is from a position of 1 m in front of the product and at a height of 1 m.

※ Operating Pressure Range: 48 kPa [abs] to Ultimate Pressure

※ Permissible pulsation range: 13.3 kPa/s [abs] or lower

※ Models with ductable exhaust (KHA100A/200A/400A/750A) are also available. Allowable duct resistance: 25 kPa or lower. (Exhaust air should not be used for any purpose.)

※ Operating environment (inlet air) conditions: air temp: 0 to 40 ℃, humidity: normal level (65±20%).

※ Due to the high compression ratios, condensation can easily form within the pump. Therefore the following measures should be taken in order to avoid trouble from rust due to condensation:During a trial run (operation of 5 minutes or less, such as a momentary operation or short test run) if the operating pressure goes above 48 kPa [abs], then a dry run of 10 to 15 minutes should be made at a pressure of 48 kPa [abs] at the vacuum side of the pump.

※ The allowable intermittent power supply voltage fluctuation range is ±10%, and the allowable sustained supply voltage fluctuation range is ±5% of the specified voltage.

※ Please install an overload protection device (such as a thermal relay). Use the current rating listed on the three-phase motor nameplate as a guide when setting the protection device.