Address:H7/1-2, Qingyang Industrial Headquarter Base, No. 1 Chengfei Avenue, Qingyang District, Chengdu, Sichuan

Overseas Dept in Shenzhen:

Tel: 86-755-83234282


Skype: ellenhu.selectech


Address: E-605 Yuetong Building,MeiLong South Road, MinZhi,Longhua,ShenZhen , GuangDong,China,518131

AT:   home <<  Durable Variable Speed Vacuum Pump
¤ VJY Series
  • Performance parameters
  • Diagram
  • Wiring instructions
  • Corresponding accessories
  • Operation video
  • Attentions


Three cavity linkage, smooth flow,Large flow rate, high vacuum, strong suction.It is equipped with
brushless DC motor, durable and low interference. It can run continuously around the clock without
interfering with the surrounding electronic components or polluting power source. Stable performance
and high reliability. Maintenance-free . Damp gas as the medium is acceptable. No pollution during
the gas transmitted as it is oilless operation. Corrosive gas is allowed to be input(The material
for the parts which come in contact with gas : Glass fiber reinforced nylon ,EPDM rubber)








Electro  Magnetic  



●Technical Specifications


Operating Voltage

(V DC)

Load Current


Flow rate (L/min)

(negative pressure)

Peak value

Effective value








●Performance Comparison:


Economical version

Simplified version


(quality level)

Brushless motor

Brushless motor ★

Brushless motor ★★







 Continuous loading service life

≥2500 Hours

>6000 Hours

Electromagnetic Interference



Ambient Temperature



Adjustment of speed



overload protection

Overload alarm signal




1.The more ★ is,the better performance of this pump shall be.The fewer ▲ is the lower
electromagnetic interference of this pump shall be.
2.The above comparison does not mean a product is not good.It is for customers reference
only.Hereby Instructions!

Tips for service life test:

1.Test condition: The service life test results based on clean & non-corrosive laboratory,
the pumps run continuously around the clock with full load. If the operation condition is
better than that of our, service life will be greatly extended.
Laboratory conditions:
Ambient temperature: 5℃-33℃, fluctuates according to the climate
Relative humidity: 50%-85%, fluctuates according to the climate
2.Instructions for Loading Test:When the inlet completely been blocked, gas outlet through
to the atmosphere without any connection.
3.Because the test is undergoing checking, the data may be updated in future without any notice.


1.The inlet of this pump can run in heavy duty ,even completely blocked, both are proper functioning.

2.The outlet of this pump should remain unobstructed. If not ,as the result of the blockage, the high-pressure
will be caused and threat to safety. If you need large damping components for the outlet, please select the FML
or FAY、FKY、FCY serials.

3.Customization is available.

4.Weight: approximately 1.2kg.

5.All parameters presented in this instruction are based on the standard atmospheric pressure at 25℃,
unless otherwise defined. The free flow is referred to as the flow.

6.There are four connect or for your option, please specified when ordering.More detail please see the drawing below.


●User Instructions

1.Service Conditions
The pump shall not be exposed to direct sun light.It shall work in clean and non-corrosive environment.
Ambient temperature:
Economical version: 0-40 ℃ (No condensation)
Simplified version & standard version:0-50 ℃ (No condensation)
Relative humidity: ≤ 90 %
2.Working medium
Damp gas is allowed,but with solid particles are not acceptable.
The materials and names for the parts which come in contact with gas as below:

Part name

Part material


Pump body

Glass fiber reinforced nylon

All material has certain ability of corrosion resistance,
please evaluate the tolerance of the parts which come in contact with gas pumped.


EPDM Rubber



According to the temperature of gas inlet,the series product can be divided into two types,
normal-temperature medium type and high-temperature medium type.Orders for high-temperature
medium type shall be specifically marked,otherwise,it shall be normal-temperature medium type.


Temperature range allowed 
for gas suction


medium type


Solid particles such as ice particles are 
forbidden to be contained in the gas suction.

medium type






VJY Series Micro Vacuum Pump Dimensional Drawings


Drawing unit: mm


1.Red power line connect the power positive pole ,black power line connect the power negative pole.
(No reverse the positive and negative?pole,it will not be damaged but the pump do not run)

2.The use of power

These pumps are equipped with torque motor,instantaneous starting current is about 6 A,the
instantaneous pulse lasts for 100 millisecond, so the power should have a certain margin.


1,This series of pumps are the biggest starting current is 6A, It lasts 100 millisecond.
2.When the motor starting current is in a static state, the maximum current that is generated by
the rated voltage is the basic parameter of the motor.
3.When the motor begin running,it will connect other auxiliary circuit at the same time,such as
speed governing, control... And so on, it will generate additional surge current superimposed on
the motor starting current, so the starting current will increase and more.
4, Tips for power: In view of this series of pump start-up characteristics,it should be used at
least 24 v, 2.7 A (about 64.8 W) or more power!
5.Customized is available.

 Optional Accessories

Filter Silicone tube(Note: inner diameter is about 8mm, and outer diameter is about 14mm.)

Note: A large size filter and a 10cm silicone tube will be included in the package for each



     1. No foreign matter should keeping in the nozzle, the outlet of this pump should remain unobstructed, or the micro pump may be damaged.

     2.The product has not explosive-proof performance. To ban the use in inflammable and explosive environment.

     3.When the gas input is hazardous, users must re-seal the pump for the sake of safety!

     4.All gas circuit elements such as pipeline and gas tank must be provided with enough strength for the sake of safety.

     5.No hot plugging with power on, otherwise it will cause the damage of motor.

Chengdu Qihai Electromechanical Equipment Manufacturing Co., Ltd
成都气海机电制造有限公司 蜀ICP备12008449 成公网备字[200600057]号