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
¤ VKY Series
  • Performance parameters
  • Diagram
  • Wiring instructions
  • Corresponding accessories
  • Operation video
  • Attentions


1.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)

2.It can be mounted in any plane.such as horizontal plane, vertical plane, slope.

3.Perfect self-protective function. It has functions of overheating protection andoverload protection.
(This function do not apply to Economical version)The pump applies to wide fields, especially in gas analyzer, 
industrial instruments etc.








Electro  Magnetic  



●Technical Specifications


Operating Voltage

(V DC)

Load Current


Flow rate (L/min)

(negative pressure)

Peak value

Effective value















Remark : customized is available


Note:Max output pressure: when the gas inlet fully exposes to the atmosphere,the 
outlet directly connects with pressure gauge,and the pressure of pump increases 
continuously and finally stabilizes at a value which is called “max. output pressure".

●Performance Comparison:


Economical version

Simplified version


(quality level)

Brushless motor







 Continuous loading service life



Electromagnetic Interference



Ambient Temperature



Adjustment of speed



Stable speed


overload protection


Overheating protection


Frequently start-stop parameters

Service life

>180 thousand times(tentative value)
>300 thousand times(tentative value)

Working condition for test

Run 30 seconds, 
Stop 30 seconds
Run 30 seconds, 
Stop 30 seconds

Cycle operation around the clock,the inlet is blocked completely.Test is still undergoing.

Speeder matched

Can not be used with speeder.


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 FQY
or FNY、FKY、FCY serials.

3.Customization is available.

4.Weight: approximately 280 g.

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.


●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



VKY Series Micro vacuum Pump Dimensional Drawings


Drawing unit: mm


White power line with red tube should connect the power positive pole, white power line with
black tube connect the power negative pole.(No reverse the positive and negative pole, it
will not be damaged but the pump do not run)

 Optional Accessories

Filter Silicone tube(Note: inner diameter is about 5mm, and outer diameter is about 9mm.)

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



     1.No foreign matter should keeping in the nozzle, 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