Multi-Stage Roots Type Dry Vacuum Pump

Power Saving Attachment



ECO-SHOCK is a revolutionary dry pump accessory that can reduce power consumption by attaching to the dry pump exhaust line.
Patent is registered (China,Japan,Korea,Singapore,Taiwan)


  • ECO-SHOCK contributes to energy saving
    - The power consumption of the dry pump can be reduced substantially.
    (Ex.)Max. 59% of power reduction at ultimate pressure running and 34% of power reduction at repeatedly chamber gas exhausting.
    (Ratio of our company's LR3601-R) *1 *2 *3
    - As the effect which suppresses the heat generation of the dry pump, it can reduces the electric power of the air-conditioning equipment too.
  • Excellent results when used with a multi-stage root type dry pump. *4
    Very effective when dry pump runs lower than 1000Pa.
  • ECO-SHOCK doesn't depend on dry pump revolving-speed-control,for that there is no degradation of the exhaust speed.
  • Easy installation by attaching a valve unit to the exhaust pipe. *5 *6

*1 Measure example of 300L chamber repeatedly air exhaust in the tact of 60 seconds.
*2 Not capable to use in applications such as flammable, burn ability and toxic gas exhausts or for solid/fluid suction.
*3 Power reduction ratio depends on the attachment model and the conditions of use.
*4 Dry pump which exhaust port can operate with no problem under vacuum is applicable. Do not install to the dry pump which exhaust port can not operate under vacuum.
*5 The installation method differ on the dry pump model type and structure.
(A modification is required with LR3600,LR3601(-R)pump to mount ECO-SHOCK)
*6 Modification could be required prior to installation of the ECO-SHOCK.


  • Countermeasure for dry pump power saving
    - Power saving of dry pumps that is used in frequently exhaust such as Load / Unload chambers.
    - Power saving of dry pumps where is using a big amount sealing gas. - Power saving of dry pumps that the exhaust velocity is high at atmospheric pressure.(Example)Equivalent to ULVAC's model LR180,LR421,LR3600,LR3601,LR3601-R


Model ES4A
Power Requirements AC200~220V±5% 50/60Hz 1phase
Consumption 400W(Maximum)
Control system Input Remote activation / stop (Electrical energize DC 24V wet contact.)
Prepare the dry contact of equal to or more than 2.0 A contact-ratings.
* Pin jumper connection is required to operate the manual Start/Stop by circuit protector.
Output (1)Activation checker (2)Energy saving checker 
(3)Main unit alarm (4)Over-current alarm
Display Display Running time, Output signal status (1) to (4)
Connection Φ16mm tube connector *Recommend for tubing length of 1.5m less
Dimensions 250mmx475mmx373mm
Weight 32kg

>> Effects <<

ULVAC pump model LR1800 LR3601-R
Pumping speed *7 Mechanical booster pump 1784m3/hr(29700L/min) 3200m3/hr(53333L/min)
Dry pump 237m3/hr(3950L/min) 440m3/hr(7333L/min)
Average power consumption
*8 *9
At ultimate pressure Without ES4A 6.0kW 7.8kW
With ES4A 2.7kW 3.2kW
Power save 55% 59%
At repeatable pumping *10 Without ES4A 7.2kW 9.6kW
With ES4A 5.7kW 6.3kW
Power save 21% 34%

*7  At 60Hz power
*8  At Seal Gas 5SLM
*9   Include ES4A Power
*10  Measure example of 300L chamber repeatedly air exhaust in the tact of 60 seconds.


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