Direct Drive Oil-Sealed Rotary Vacuum Pumps GLD-051
Two-stage / with cord, and switch


GLD series features high performance, low vibration and noise and several functions such as gas ballast valve, oil-back-flow prevention mechanism, and large sized oil level gauge.


Chemical, science experiment, Analyzer and Laser system.
Backing pumps for the electronic microscope.
Semiconductor equipments, sputtering equipments, vacuum evaporation equipments.
Vacuum dryer, freeze dryer.

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

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

Motor   Single phase, 100V, 200W, 4 poles, split phase starting
Full load current A 5.6 4.8
Oil capacity mL 500 – 800
Recommended oil   SMR-100
Weight kg 13.9
Inlet port diameter mm KF-25
Ambient temperature °C 7 – 40
Overall dimensions mm 165.5(W) × 395(L) × 222.5(H)
*Ultimate pressure is measured by 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.
4. It is not suitable for the pump if operation is performed continuously at a high evacuation pressure of 10kPa or more.
5. 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.
6. 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.

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
Single phase, 230V
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.