VELP'S TIPS FOR CHOOSING YOUR NEXT OVERHEAD STIRRER

Are you seeking an Overhead Stirrer that provides the best performance, even in the most challenging applications? Discover the VELP Overhead Stirrer and choose the one that better suits your needs.

Mixing is one of the most frequently used processes in the laboratory. Achieving excellent performance is possible only by configuring the correct stirring system for the desired application.

For almost 40 years, VELP has been a leader in the design and development of laboratory technology and offers a complete range of Overhead Stirrers suitable for every challenge in terms of viscosity, torque, and sample volume.

The VELP Overhead Stirrers are a real guarantee of high performance and reliability for a wide variety of applications:

• Mixing and stirring substances

• Dissolving solids in solvents

• Stirring viscous solutions

VARIABLES TO CONSIDER WHEN CHOOSING YOUR OVERHEAD STIRRER

Viscosity is one of the main parameters to consider when evaluating different Overhead Stirrers.

Viscosity is a measure of the fluid’s resistance to flow or change in shape due to internal friction between the molecules and it is expressed in centipoise, mPa*s. It can change following the addition of solvent or while mixing.

It is important in relation to how much effort we have to make to stir the medium, leading to understanding the torque that is required.

The third important factor to consider is the volume of the sample and any change during mixing.

As the volume and viscosity of the sample increase, so does the torque required for mixing.

Both the choice of Overhead Stirrer and stirring shaft depend on these variables.

VELP OVERHEAD STIRRERS AND ACCESSORIES FOR EVERY MIXING REQUIREMENT

VELP offers a complete range of Overhead Stirrers with state-of-the-art stirring power and intelligent functionalities, for continuous operation even in harsh environments.

ENTRY-LEVEL OVERHEAD STIRRERS

• Analog or digital version

• Designed to agitate volumes up to 70 L, 50.000 mPa*s, and a maximum speed of 2000 rpm

• Maximum safety thanks to overload, overcurrent, and overheating protection

• Technopolymer construction and IP 40 rating for excellent protection and chemical resistance

• Easy to handle, being among the lightest rod stirrers on the market

OHS OVERHEAD STIRRERS

• Advance version (3.5" TFT display, timer, connectivity to VELP Ermes cloud platform and USB) or Digital version (digital display and timer)

• Maximum stirring power for volumes up to 100 L, 100.000 mPa*s, and a maximum speed of 2000 rpm

• SpeedServoTM torque compensation technology keeps the speed constant automatically adjusting to viscosity changes

• The Brushless motor maintains stable torque at any speed. This is a very important parameter for test reproducibility

• The resistant sealed housing and the IP 54 Protection Rating guarantee durability even in the most aggressive environments

• Chuck Guard to protect operators from contact with the upper part of the chuck and from the entanglement with the stirring elements

VELP STIRRING SHAFTS

The power of the stirrer, the volume of the sample to be stirred and the viscosity should be taken into consideration when choosing the stirring shaft.

VELP stirring shafts differ in their type of flow (axial, tangential, radial) and stirring speed.

VELP H-STAND ENSURES STABILITY AND RESISTANCE FOR LAB BENCH OHS APPLICATION

VELP H-Stand is the ideal solution when the overhead stirrer is working on laboratory benches.

We have designed our H-Stand to guarantee maximum stability, thanks to the H-shape of the base, and the maximum resistance, choosing premium materials such as aluminum and stainless steel, properly treated in order to resist chemicals and corrosion.

The Telescopic H-Stand facilitates the daily operations being easy to use when raising and lowering the overhead stirrer from your sample.