The GHD Series of small vacuum pumps is a family of oil-sealed rotary vane pumps designed for a wide variety of applications including use in analytical and laboratory equipment and as a backing pump for the industry leading HELIOT 900 Helium Leak Detector. The GHD is designed with a magnetically coupled motor to eliminate the problem of shaft seal leakage, and improve the life of the motor. Available in multiple sizes to accommodate the precise needs of your application.


  • Wide range voltage motor and correspond to CE, cTUVus.
  • Magnet coupling for no oil leakage from shaft seal and realized longer lifetime.
  • Integrated check valve below the inlet port for backflow prevention.


  • Helium leak detectors.
  • Analytical equipment.(GC/MS,ICP/MS,LC/MS)
  • Laboratory experiment.


Model GHD-031A GHD-101A
Unit 50Hz 60Hz 50Hz 60Hz

Actual pumping speed

L/min 30 36 100 120

Ultimate pressure※1

Pa 0.67 0.67


Single phase, 100~120V, 100W, 2P,Capacitor run Single phase, 220~240V,
Full load current 0.94 (200V), 0.84 (240V) 1.02 (200V), 1.03 (240V) 2.5 2.7

Oil capacity

mL 370 1,000

Recommended oil

R-2 R-2


kg 9.3 22

Inlet port diameter

mm KF-16 KF-25

Outlet port diameter

G3/4 G1

Ambient temperature

7~40 7~40

External dimensions

mm 120(W)×288.5(L)×163(H) 150(W)×413.5(L)×234.5(H)

※1:Ultimate pressure is measured by Pirani gauge.
(In the case of measurement by McLeod gauge, the value is lower by an order of magnitude for pumps with an Ultimate pressure of 1.3 Pa or less.)

※2:Power supply plug and Power supply code are not included.

Corresponding certificate/Voltage

Model Applicable standard CE
Declartion of confirmity





●:Standard、○:Option、-:Not Available
※TUV Certification: A high-quality product that complies with European standards as assessed by an international third party that conducts product safety testing and certification.
※cTUVus Certification: A high quality product that complies with Canadian and US standards as assessed by an international third party that conducts product safety testing and certification.


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.
If operation is performed at high pressure, oil mist is generated at the exhaust side.
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.
This motor houses an automatic returning thermal protector, which may be activated in case of trouble.
The motor will restart automatically when the temperature goes down.
If the thermal protector is activated, switch off the power immediately for safety reason.

Catalog Download

Small Oil Rotary Vacuum Pump GHD Series