What is a peripheral water pump?

Peripheral Pumps

The Peripheral pump is a niche product between the Displacement and the Centrifugal pump, in which the medium is pumped in a Peripheral channel. Today, the Peripheral pump has become crucial in many applications.

Peripheral pumps have the following characteristics:
* they have an ability to transport gas without interrupting the liquid flow or without damaging the bearings due to dry running
* they have their highest power consumption at their highest discharge pressure and their lowest flow rate
* their steep Capacity/Head (Q/H) curves are ideal for pressure-dependent system regulation
* they are non-sensitive to wrong turning direction
 * they need very low suction heads (NPSH)
* their narrow columns (peripheral channels) do not allow abrasive components in the liquids

When started, the liquid is sucked through the suction flange and directly into an annular channel, in which rotates the peripheral impeller. The peripheral impeller consists of straight blades, transforming the fluid into a centrifugal motion. The liquid leaves the pump through the discharge flange after it has passed through the annular channel. In the annular channel, the kinetic energy is transferred from the blades onto the liquid, increasing the fluid’s pressure.

The working principle is very similar to that of a Side channel pump. In contrast to the characteristic of ordinary centrifugal pumps, the curves do not flatten with decreasing liquid flows. The pump curves are rather straight lines with their maximum heads at low flows and low heights at peak flows.

This is precisely from the fact that the Peripheral pump is a volume displacer pump.

Check out Superpump for a range of DAB peripheral pumps

Great pump for koi ponds

I started using this DAB nova water pump in my koi pond. Much cheaper than a standard pump, same performance.

Works great with clean water, and for pond size up to 8000 L, it moves 6000L per hour which is more than enough for my requirement. check it out.

Pump Terms

Lift - The height that water needs to be lifted vertically for removal

Head - The vertical lift in height at which a pump can no longer exert enough pressure to move water.

Prime - Starting a flow in a pump by filling it with water.

Flow - The volume of water a pump can move, usually measured in gallons per minute, gpm

Pressure - The force delivered at a given point in a pumps discharge line. Usually measured in pounds per square inch, psi.

What is a self-priming centrifugal water pump

A self-priming centrifugal water pump is a centrifugal pump that has the ability to pump an air water mixture.

Standard centrifugal pumps
Standard centrifugal pumps needs to have the impeller surrounded by only water before the pressure differential is created that is needed to pump water.

Air is the main enemy of these types of pumps. When air gets inside the pump it can cause the pump to stop pumping. When a pump gets air-bound it needs to be primed manually before the pump will start functioning properly again. If the pump gets air bound the impeller will spin in the air bubble and this can cause the motor to get damaged.

Self priming centrifugal pump
The self priming centrifugal pump has the ability to mix the air with water to create a mixture that has similar properties to normal water. This mixture can then be pumped out until all the air has left the system. This process is called "Self-priming"

Please note that a self priming pump needs some water inside the system before the self priming process can happen successfully.

Have a look at our centrifugal pumps at Superpump South Africa.

Borehole pump sets - SuperPump

Get your borehole pump now at Superpump.co.za
http://www.superpump.co.za/7-borehole-pumps-sets

DAB water pump suppliers South Africa - SuperPump

http://www.superpump.co.za/

How to choose a borehole pump

When choosing a borehole pump it is important to keep the following factors in mind:

• Head
• Pumping rate

Use the following steps to determine the pump that you require.

STEP 1. PUMPING RATE REQUIREMENT

Determine how much water you need every hour of the day. You can do this by estimating your daily water needs and dividing it by twelve. (We assume a 12 hour usable wind day which is a conservative estimate.)

STEP 2. TOTAL PUMPING HEAD

We will now determine the total pumping head with the following equation:

The total pumping head = (depth of water taken from borehole) + (height of reservoir above ground level)

It is important not choose a pump that is more than 65% of the capacity of the borehole otherwise the borehole might collapse or the motor can burn if the borehole runs dry.

For a selection of pumps have a look at the borehole section on our Superpump site.

What is a borehole pump?

What is a Borehole Pump?

A borehole pump is used to extract water from a borehole. Boreholes are narrow shafts drilled vertically into the ground. The holes are made using a drilling rig that creates a borehole with specific dimensions so that the borehole pump can fit through with very little clearance on all sides.

How does a Borehole Pump work?

Because borehole pumps come into direct contact with minerals in the soil, they are typically made of corrosion resistant materials. Borehole pumps consist of two main components: a foot part that houses the pumping mechanism and makes contact with the water that is to be pumped; and the head part, which serves as the weight-bearing portion and the outlet for the water

Where are Borehole Pumps used?

Borehole pumps are used in a variety of fields including irrigation, municipal water supply, construction, mining, and industry.

Superpump

Booster Pumps

Bosster or pressure pumps are designed for high flow at high head. The booster pump will increase the flow of water but a significant percentage to fullfill all of you pump needs.

Centrifugal water pumps

Centrifugal pumps, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. Centrifugal pumps are used to transport liquids/fluids by the conversion of the rotational kinetic energy to the hydro dynamics energy of the liquid flow. The rotational energy typically comes from an engine or electric motor or turbine. In the typical simple case, the fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits.

Common uses include water, sewage, petroleum and petrochemical pumping. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.

DAB Pumps

There is one name in the motor-driven pump sector that has been synonymous of high technology, quality and reliability all over the world for more than 30 years. This name is DAB. Since 1975 it has been designing and constructing motor-driven pumps within a well-defined scenario: to meet the increasing market demands and not only with the highest quality products but also with an efficient, flexible service.

DAB offers a vast range of water pumps to meet any need. Our water pumps are produced with state-of-the-art materials that improve their ability to resist internal and external stresses, and guarantee their high performance, quality and durability over the long term, thereby limiting their environmental impact. DAB pumps are the result of continuous research and technological innovation directed towards offering flexible, easy-to-use solutions for every type of application.

Get them now at Superpump in South Africa

Superpump launch in South Africa!

Superpump South Africa are proud to launch in October 2012.

We are the sellers of the following pumps or alternatives in the South African and African market:

• Alpha pumps
• Aqua24 borehole pumps
• Brisan turbo pumps
• Cemo pumps
• Cobra water pumps
• Conforto water pumps
• Curo pumps
• Cyclone pumps
• DAB water pumps
• Ebara water pumps
• Flygt
• Foras water pumps
• Franklin Electric
• GMP pumps
• Gorman-Rubb pumps
• Grundfos water pumps
• Hawk water opu
• Hymech pumps
• JoJo Tanks
• KSB pumps
• Leader pumps
• Lister pumps
• Lowara pumps
• Mono pumps
• Pedrollo water pumps
• Pentax water pumps
• Salmson pumps
• Seoca water pump
• Speck pumps
• Speroni pumps
• Vansan water technology
• Varem pumps
• Varisco

Watch this space for info about pumps etc.