How to Select a Drum Pump

• Size of container- Depending on the container depth, different length drum pumps can be provided. Standard drums need 1000 mm pumps, IBCs usually 1200mm. Will you be switching between locations or containers? Will the drum be open or closed (also known as tight-head)? This allows you to choose the correct clamping device or compression gland to secure the pump in the vessel. Also ensure the pump will fit into the opening of the container by checking its diameter.

Pump selection

Next, identify which pump family suits the application best. Consider whether an impeller or progressive cavity design is most suitable. Impeller pumps are typically specified for low viscosity applications (<1000 mPas). Progressive cavity pumps for higher viscosity applications. Consider how often the pump will be used and for how long. What approvals are needed, eg. EN1935 or FDA CFR 21 for food products, or Ex-certification if flammable vapours are present?

Moving onto the motor

Now select an appropriate motor. What voltage is required? Do you need an air-driven or electric-powered motor? Electric motors are commonly 110v or 230v single-phase designs, however brush-less, three-phase and battery motors are available. Motors commonly have an IP rating of either 24 or 55.

Do you require the motor to be fully enclosed? Completely enclosed motors (also known as internally-cooled) help protect the media from carbon dust and are unaffected by corrosive

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fumes. Is variable speed control required, to adjust flow rate? What about duty cycle? S1 rated motors are suitable for continuous running and will not cut-out after a short period. Again, consider whether Ex-certification is required.

Compressed air motors are also available. Air motors are Excertified, therefore suitable for use in hazardous locations. However, they require a supply of dry, lubricated air, plus they tend to be noisier and less efficient overall than electric motors.

Additional accessories

Accessories are also important when selecting a drum pump. Do you require hose? Conductive hose and fittings are required when pumping flammable liquids. Perhaps a flow meter or batch controller is necessary for pumping accurate volumes? Would a fume gland or strainer be beneficial in your application? How about a hand nozzle to control dispensing?

Additional thoughts on selecting the right drum pump

There are many other factors to consider when choosing the right barrel pump. Those listed in this article are just a few examples. Specialist support engineers can be of great help. Their expertise and experience will guide you to the best pump for your individual task – particularly useful when handling dangerous or difficult high viscosity liquids. ■

For more information, Email: sales@flux-pumps.co.uk Phone: +44 (0) 1202 823304