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Applied Vacuum Engineering

Vacuum-Degassing

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Applied Vacuum Engineering

Vacuum-Degassing

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Variable Speed Controlled Through the Lid Stirrer

Motorised Stirrer

Motorised Stirrer

This system is a variable speed motorised vacuum paddle stirrer, available as a direct replacement for the DP42, DP76 and DP118 litre degassing chamber lids, with a separate controller unit. Simply plug in and go.

The system contains:
  • Lid mounted 220 DC Motor, 120W, 7.6Nm – 11.6Nm torque. With 30:1 gearbox.
  • Variable speed controller 2.7-133 or 200 RPM with mains cable and UK 3 pin plug.
  • 230 volt mains supply
  • High efficiency 120mm diameter replaceable steel paddle. (Paddle shaft can be shortened if required)
  • Dynamic O-ring vacuum rotary shaft seal (Replacement O-ring kit available)
  • Clear acrylic lid
  • Lifting handles
Note:
Viscosity Limits and Mixing Guidelines for Vacuum Stirrers:   
Our vacuum stirrers are highly effective for most applications but have limitations regarding extremely thick mixtures. The suggested maximum viscosity for effective use is 800P (poise), 800,000cP (centipoise), or 80Pa.s (Pascal seconds).   
 
Understanding Dynamic Viscosity Variables
Due to the dynamic nature of viscosity and multiple variables (container radius, fluid depth, rotational speed, and motor torque), performance calculations can vary significantly.
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(Model shown is the DP76-STIR-20)

Example Scenarios:
  • In a 118L chamber with an 180mm depth of mixture and motor speed at 60rpm, the mixture viscosity should not exceed 500P (50,000cP).
  • Conversely, at a slower speed of 30rpm, the motor could handle mixtures up to 1000P (100,000cP).
  • At a faster speed of 120rpm, the mixture should ideally be below 250P (25,000cP).
Precision Speed and Torque Control:
To manage changes in torque as motor speed increases, the control box features a potentiometer that precisely manages the acceleration and deceleration periods of the motor. 
 
Controlled Acceleration Example:

You can set the desired RPM to 100 and the acceleration time to 5 seconds (adjustable between 1s to 15s). The system will start mixing slowly with maximum torque and gradually reach the set 100 rpm over the 5-second acceleration period.  You maintain full manual control over both rotational speed and acceleration using the intuitive dial located on the front of the control unit.

Part Numbers:

42 litre stirrer DP42-STIR-20

76  litre stirrer DP76-STIR-20

118 litre stirrer DP118-STIR-20

 

For more information use the contact button or contact form on the contact page, call or email.