Direct Drive Oil-Sealed Rotary Vacuum Pumps GCD-201X
Two-stage / with thermal protector / without cord


GCD Series, direct drive, oil rotary vacuum pump is corrosion resistant for toxic and corrosive gases which is ideal for chemical, pharmaceutical applications.
Surface of gas contacted parts are coated with hard plating. Three different size available from 50L to 200L/min.


Semiconductor industry.
Chemical industry.
Post chemical-treatment drying.
Pharmaceutical industry.

  Unit 50Hz 60Hz
Actual Pumping Speed L/min 200 240
Ultimate pressure Pa

0.67 (G.V. closed)
6.7 (G.V. open)

Motor   Single phase, 100V, 550W, 4 poles, Capacitor start & run
Full load current A 8.0 7.2
Oil capacity mL 1,100
Recommended oil   SO-M
Weight kg 29.4
Inlet, outlet pipe diameter mm KF-25
Ambient temperature °C 7 – 40
Overall dimensions mm 170(W) × 541.5(L) × 241.1(H)
*Ultimate pressure is measured with Pirani gauge.

1. Oil is deteriorated with operating, and becomes the factor of performance shortage.
A decrease and the dirt of oil are confirmed, and please regularly add and replace it.
2. A backflow preventer is incorporated into the pump to prevent the oil from flowing back while the pump is stopped. Please make a suction side into atmospheric pressure when the pump is stopped for a long time.
3. If operation is performed at high pressure, oil mist is generated at the exhaust side.
We will recommend the use of the oil mist separator for the oil mist splash prevention.
4. The influence might go out to the pump life according to the characteristic and the amount of the evacuated gas.
Especially, longevity is remarkably shortened, and corrosion resistance might not be able to be demonstrated about ammonia and sulfuric acid.
5. It is not suitable for the pump if operation is performed continuously at a high evacuation pressure of 1kPa or more.
6. There is a risk of explosion. Never block the outlet or operate the pump with equipment mounted at the outlet side that blocks the passage of gas.
Otherwise, the internal pump pressure increases causing the pump to explode, the oil level gauge to protrude or the motor to be overloaded.
7. Same parts of the pump are made by carbon.
Oil becomes black with wear-out powder of carbon parts, when operation is doing.
But it doesn’t affect the performance and service life of the pump.
8. Fluoride rubber material is used for the internal parts of a pump.
There are some for which the chemical resistance of Fluoride rubber materialis not suitable.
Especially, be careful of the following chemical.
Ammonia, Acetone, Ethylene oxide, Ethylene diamine, Zinc acetate, Amyl acetate, Aluminum acetate, Isopropyl acetate, Ethyl acetate, Lead acetate, Calcium acetate, Cellosolve Acetate, Nickel acetate, Butyl acetate, Propyl acetate, Methyl acetate, Nitroethane, Nitropropane, Nitromethane, Freon.

Outline Drawing

Pumping Speed Curves


* You can see each option, if you click an option.

Optional Voltage
Voltage Applicable Volt CE Marked TUV Marked cTUVus Marked
Single phase, 100V Standard
Single phase, 200V
Single phase, 220V
Three phase, 200V

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Copyright (C) 2003 ULVAC KIKO, Inc. All Right Reserved. Ver.4.00 (December 2011)
· The dimensions and specifications of the products listed in this site are subject to change without prior notice for improvement of their performance.