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


It is equipped with brushless DC motor, durable and low interference.No pollution during the gas 
transmitted.Maintenance-free.It can be mounted in any plane.Damp gas as the medium is acceptable. 
Air pump flow can be adjusted .(This function do not apply to Economical version).Corrosive gas is 
allowed to be input(The material for the parts which come in contact with gas : Glass fiber reinforced 
nylon ,EPDM rubber) .It can run continuously around the clock.







Electro Magnetic



Technical Specifications:


Rated Voltage
(V DC)

Load Current

Flow rate (L/min)

(negative pressure)

Peak value

Effective value











●Edition comparison

Three versions for each model for your option ,difference as below:


Economical version

Simplifed version


(quality level)

Brushless motor










Continuous loading service life







Ambient Temperature




Adjustment of speed



Stable speed


overload protection


Overheating protection


Speed feedback signal




Speeder matched

Can not be used with speeder.

External control 

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.
Here by 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 outlet completely been blocked , gas inlet through to the atmosphere without any connection. 

3.Because the test is undergoing checking, the data may be updated in future without any notice.


Tips for selection of products:

1.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 FNY、FKY、FCY、FQY serials.

3.Customization is available.

4.Weight:approximately 580 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.

6.There are three connect or for your option, please specified when ordering.If there is no remark,
it'll be considered that you order the Pagoda joint. Such as VNY6212-24V(one-touch tube fitting), 
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 ventilated environment.

Ambient temperature: 
Economical version: 0-40 ℃ (No condensation) 
Simplified 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, such as VNY6216-24V(high-temperature medium type),
otherwise, it shall be normal-temperature medium type.


Temperature range allowed for gas suction


Normal-temperature medium type


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

High-temperature medium type



●Filtering instructions:

After working for a period of time, the dust contained in the gas will accumulate in the pump chamber, and gas 
tightness of the pump may be damaged, and slow down the flow rate and degree of vacuum, so a filter is needed 
at the gas inlet. 


WAT Series Micro Vacuum &Liquid Pump Dimensional Drawings


Drawing unit: mm


● Instruction of wiring:

1.The red power line should connect the power positive pole, the 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).The power light have
two colors(Red and Blue).When the light is red,it shows that the power is switched on and the motor is not running.
When the light is blue, it shows than the pump is working.

2.Instruction of speed(Standard version)

1)Instruction of switch:Default value is the pump speed of factory setting,When the pump is switched to
the position,the pump runs at the speed of the factory setting. When the pump is switched to the speed governing,
the speed of the pump can be controlled by the external control signal.

2)Instruction of speed control interface and wiring:








Control speed

Connect the negative pole of control speed signal



Apply signal voltage

By regulating the input voltage signal to control the pump output flow, they are the increasing function relationship. Analog voltage is between 1~5V DC. When the voltage is less than 1V, the pump stops working.When the voltage is more than 5.5V ,it will cause the damage of motor. It can control the motor start and stop.



Apply signal frequency

By adjusting the frequency of the input signal frequency control pump output flow, they are the increasing function relationship. The voltage of frequency signal is between 0~5VDC.The frequency is between 1100~2500Hz.When the frequency is less than 1100Hz, the pump stops working.When the frequency is more than 2500Hz ,it will cause the damage of motor. Frequency signal:±30Hz. It can control the motor start and stop.





Note:When the pump speed is adjusted, the input signal is the voltage signal or the frequency signal, and they are alternative. It can't input voltage and frequency signals at the same time.


●The use of power:


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.


●Fitter: VNY6216 match with big size fitter.

Silicone tube:

① One-touch tube fitting:The band of silicone tube must be SMC (Size of silicone tube:ID:6mm, OD:8mm.),
otherwise it will lead to poor sealing of joint,the tube can not normally plug,it will cause the damage of joint,
etc.30mm silicone tube is free,if you need more,please purchase by yourself.

②Pagoda joint: Size of silicone tube :ID:7mm, OD:13mm



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

2.The product has not explosive-proof performance.No using 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 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