Your first concern is to pump water. Before making that telephone call to
order your pump, there are a number of questions that need to be answered.
We want to make certain that you get the pump you need.
- What is your application? Describe your pumping application, what
is it that you need to do with the pump.
- What is the liquid that you are pumping? If it is water, then describe
the condition of the water and if you are pumping any solids or sand. Is
it hot water? If it is something other than water, be very specific about
the liquid and its properties.
- Are you looking for an approximate flow? Gallons per minute or
per hour.
- What is the height from the surface of the water you are pumping
from to the pump?
What is the length and diameter of your discharge hose/pipe?
- Is there any vertical rise in the discharge hose? If so, what is the
vertical distance from the pump to where the water is discharging, or
the highest point along the discharge hose.
- Are you using rubber/PVC water hoses, steel pipe, or PVC
pipe?
These few questions will give you a good start in getting the correct pump for your job.
Also take in consideration
Is the pump self-priming?
Self-priming is a term used to generally describe many types of centrifugal pumps. This very simply means the pump has the ability to purge air from its
casing and suction hose creating a partial vacuum allowing water to flow freely into the pump.
Submersible Pumps
Few items provide as quick a return on investment and as long a
work life as submersible pumps. Their compact and streamlined
design makes them ideal for wells and other jobs where space is
limited.
Standard centrifugal pumps provide an economical choice for general purpose dewatering. A number of different sizes are
available but the most common model offerings are in the 2 to 4 inch range with flows from 142 to 500 gallons per minute (GPM) and heads in the range of 90 to 115 feet.
These pumps should only be used in clear water applications (agricultural, industrial, residential) as they have a limited solid
handling capability of only 10% by volume.
Trash centrifugal pumps get their name from their ability to handle large amounts of debris and are the preferred choice of contractors and the rental industry. The most common sizes are
in the 2 to 6-inch range producing flows from 200 to 1,600 GPM and heads up to 150-feet.
Trash pump will generally handle spherical solids up to ½ the diameter of the suction inlet. Solids
(sticks, stones and debris) flow through without clogging making them ideal for the water conditions typically found on job sites.
Trash pumps handle up to 25% suspended solids by volume.
Diaphragm pumps use a positive displacement design rather
than centrifugal force to move water through the casing. This means that the pump will deliver a specific amount of flow per stroke, revolution or cycle.
Engine-powered versions are the most common and typically use the drive shaft to turn an offset connecting rod that is coupled to a flexible diaphragm.
Diaphragm pumps are commonly referred to as mud hogs, mud
hens and mud suckers. Their names reflect their popularity for
use in applications where shallow depths and slurry water render
centrifugal pumps ineffective.
A diaphragm pump provides the lowest rate of discharge and head by comparison of any contractor pump.
Making your pump last
Every six months, check the impeller for wear, and for clearance between the impeller face and the volute. Refer to the manufacturer’s
recommendations. Check the shaft seal for wear, as well as the shaft sleeve. Clean the casing and volute passages.
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