Choosing the right pump: electric diaphragm pumps vs other pump technologies
The benefits of the Husky electric operated double diaphragm (EODD) pump compared to other technologies.
Graco’s Husky electric operated double diaphragm (EODD) pumps offer innovative and unique solutions to age-old issues encountered by businesses using other pump technologies. Through its flexibility and customisable design, it is perfectly suited to an exceptional variety of applications and conditions.
Main drawbacks of traditional pump technologies
Here are some of the most common obstacles users face when working with traditional pump technologies.
- Centrifugal pumps
Centrifugal pumps are reasonably priced but rather incompatible with many fluids. Their intricate and sensitive design is not suited for abrasives and solids, which will quickly damage the impellers. Since they work at high speed, they tend to shear liquids, so they are not suited to shear-sensitive liquids either. In addition, their design does not allow for much variation in the flow rate. The application, pressure and flow rates need to be very stable for the pump to be efficient.
Are centrifugal pumps getting you frustrated?
Have a look at The benefits of EODD pumps compared to centrifugal pumps to explore an alternative solution.
- Magnetic drive pumps
Although magnetic drive pumps have done away with issues caused by leaking mechanical seals, they can only be used with clean liquids, which makes them unsuitable for applications that involve solids. Furthermore, their magnetic mechanism can cause overheating and even alter the fluid’s composition. The heat generated by the magnets may be high enough to bake constituents of the process liquid into the impeller magnet hub, resulting in build-up of a deposit.
Is the excess heat produced by your magnetic drive pump causing issues? Take a look at Choosing the right pump: magnetic drive pumps vs EODD pumps to find out more about this alternative.
- Rotary lobe pumps
Rotary lobe pumps require timing gears, which are located in the gearbox. These prevent the lobes from making contact, which is a great feature of this design. However, the gears are an additional piece of equipment that need to be maintained and replaced from time to time. They also lack performance when pumping thin, low viscosity fluids as there are larger clearances between the lobes. The low viscosity fluid makes its way between the lobes, reducing lift and efficiency.
Would you like to find out more about rotary lobe pumps and how they compare to EODD pumps?
Have a look at Rotary lobe pumps vs EODD pumps: pros and cons.
- Gear pumps
Gear pumps can pump fluids with high viscosity within an impressive temperature range, but they are plagued by high maintenance costs because of their sensitive design and the need for expensive spare parts. Because of their size, gear pumps are unsuitable for operations with large bulk flow rates. They have a clearly defined design envelope outside of which they will have reduced life and ineffective performance.
Are you tired of your gear pumps losing efficiency too soon? Have a look at Choosing the right pump: gear pumps vs EODD pumps and find your perfect fit.
- Progressive cavity pumps
Running dry is by far the main reason these pumps fail. Fluid always has to be pumped to lubricate the contacting surfaces between rotor and stator. The progressive cavity pump drive transmits its power to the internal screw through the pump casing using a rotary shaft seal. A mechanical seal is an expensive wear part and sensitive to increased heat, abrasives and non-lubricating liquids, increasing the risk for leakages over time. Furthermore, the mechanical seal raises sanitation concerns and is costly to repair. Finally, the material being pumped can be altered by the rotation and friction of the shaft and seal, further heating the liquid.
Are progressive cavity pumps squeezing your maintenance budget? Have a look at Progressive cavity pumps vs EODD pumps: pros and cons to discover a solution.
- Peristaltic pumps
While peristaltic pumps are widely used and trusted for a variety of applications, especially for smaller flow rates, users tend to be frustrated at the pumps’ significant footprint and high maintenance costs. The flexible hose used in peristaltic pumps tends to degrade with time, particularly when used with abrasives. Unless the unit is equipped with an expensive leak protection feature, rupture of the hose can cause leaks and lead to hazardous situations. Because of this, hoses need to be replaced frequently.
Frustrated by the high maintenance costs of your peristaltic pumps? Have a look at The benefits of EODD pumps compared to peristaltic pumps and find the perfect pump for your situation.
Graco Husky EODD pumps
The Husky EODD pump is an electric operated double diaphragm (EODD) pump from Graco. Compared to traditional pumps, the Husky EODD pump provides much more flexibility and sustainability and exclusive innovative features. Take a look at the benefits:
- Self-priming
The Husky EODD pump is self-priming and has excellent suction capabilities.
- Seal-less
The Husky EODD’s seal-less diaphragm pump design eliminates expensive rotational seals, saving you money on spare parts and reducing downtime.
- Flow control and batch dispense
The Graco EODD Motor Control offers two control methods. Flow Control allows the pump to control its flow by increasing or decreasing the speed of the motor. The controller can be set to a specific desired flow rate, including maximum acceleration and deceleration. In Batch Dispense Mode, the pump dispenses a user-specified amount of material. The dispense flow rate and other characteristics can be specified by the user.
- Stalls under pressure
Graco’s Husky EODD pump is the only electric diaphragm pump on the market that stalls under pressure, without the need for pressure sensors and additional controllers, to prevent pump failures from clogged lines or closed valves.
- Runs dry
The Husky EODD pump can run dry indefinitely without causing any damage to the system, thus avoiding expensive repairs.
- Low operating costs
The Husky EODD pump’s energy-efficient electric drive reduces energy consumption by up to five times compared to other technologies. In addition, it doesn’t require a pulsation dampener, because of its low pulsation mode.
- Quiet operation
The Husky EODD does not require a muffler to dampen the noise caused by the air emitted by an air motor, so it runs much more quietly than AODD pumps.
- Wide operating range
The Husky EODD pump is well suited to varying flow, pressure and applications. It poses no risk for shear-sensitive liquids and can easily handle abrasives and solids. Furthermore, it can be configured in a wide range of materials to suit any application.
- Small footprint
The Husky EODD pump is extremely compact, so it takes up minimal space on the work floor.
SUMMARY
These are the Husky EODD pump’s benefits in a nutshell:
Other pump technologies | Graco Husky EODD pumps |
Narrow best efficiency point and preferred operating range | Consistent reliability over operating range |
Deadhead/stall causes severe damage | Easily deadhead/stall with no additional equipment |
Expensive/complex repair | Easy to repair at low cost |
Process changes can lead to cavitation | No degradation due to changing conditions |
Difficult to choose correct pump | Simple pump selection (pressure/flow/chemical composition) |
Shaft alignment difficult to maintain | No spinning shaft seals; no alignment necessary |
Not self-priming | Excellent self-priming |
High operating cost | Energy-efficient drive; low operating cost |
Damaged when running dry | Can run dry indefinitely |
Ready to discover more?
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