What is an ANSI Pump ?
The DAF water pump is the heart and soul of a DAF System – it recirculates the water and keeps the DAF moving! ANSI pumps are the only dimensionally standard pump type in the industry, meaning your pump parts are readily available through any reputable pump vendor. The ANSI Pump allocates for some of the largest capital, operational costs and maintenance expenses involved in wastewater pre-treatment systems.
Using ANSI Pumps makes it easy on the end-user, since all components are dimensionally standard, the motor, coupling, impeller, volute and bedplate are all interchangeable. Comparable sizes of all manufacturers have identical component dimensions. Manufacturers that employ ANSI pumps in their DAF systems design can source parts from any reputable pump vendor.
Because ANSI pumps are standard across the industry, enormous competition from pump manufacturers has driven costs down. Specialty DAF pumps don’t have that kind of competition so, naturally, their prices are much higher. Hopefully you take care of whatever pump you operate and don’t need to think about replacing it, but if you do eventually have to bite the bullet and get a new one, you’ll be glad it’s an ANSI pump.
Benefits of an ANSI Pump
- Readily available from any pump vendor
- Have high tolerance for solids
- Can be made of high hardness materials
- Less expensive to own and operate
Where are ANSI Pumps Used ?
ANSI pumps are designed specifically to function in food processing, oil refinery, general manufacturing, pulp and paper, and chemical applications. They can pump liquids with or without solids and can be fitted with various alloys for operation in corrosive environments. When used in DAF applications, ANSI pumps operate at discharge pressures between 70-90 psi.
Why Choose an ANSI Pump?
No Air in Pump Chamber
The ANSI pump is used to transfer water and that’s it. Specialty whitewater pumps come in a regenerative turbine or a multi-stage impeller configuration. These pumps pull atmospheric air (or receive an inlet feed of compressed air) into the pump chamber where impellers mix and shear the air with water to form micron-sized bubbles that dissolve to create an air-water mixture. With air inside a pump, there is always a risk of cavitation, which causes internal damage and results in more-frequent-than-desired parts replacement. In the ANSI pumps, air is not pumped into the chamber and the whitewater is generated in a static “air dissolving tube” downstream of the pump as water comes in contact with small volumes of compressed air. By placing the responsibility for generating whitewater on a static tube made of stainless steel, the ANSI pump can focus on what it does best – move water.
Operates at Lower Pressure
ANSI pumps as designed for a DAF system are only required to pump water at 70-90 psi. Specialty pumps more typically require 90-110 psi. Lower pressures on the ANSI pump means lower electrical consumption and savings on operational costs.
High Solids Tolerance
By nature of the way they operate, specialty DAF pumps have low solids tolerance. When you start-up a DAF system that’s been off over-night, any left over solids that make their way into the pump can cause internal damage and reduce the lifespan of the pump.
This issue is less relevant to ANSI pumps because they have a larger tolerance for solids.
How do ANSI Pumps compare to Speciality Pumps?
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