Borehole, how much water can I extract
Borehole, how much water can I extract When trying to determine the volume of water one can draw out of a borehole, it is crucial to have an accurate water yield test report. The driller of the hole will conduct a draw down test to determine how much volume the aquiver is providing to the specific well (hole). Should it be producing 100 litre per minute for example, we recommend that the user not install a pump greater than 50% of the yield. The reason for this is that the actual well will not pull down completely and the level in the hole will remain static with a 50% draw from the yield. Premature borehole collapse is encouraged by rapid adn excess extraction by installing borehole pumps which are capable of removing the full yield volume or even more per minute. Pedrollo 4 SR submersible deep well pumps provide a quality and efficient solution to both standard and solar power options. In South Africa we do not find any demand at this stage for 6″ pumps. Please contact our sales team for qualified free information and assistance in pump selection.
Pedrollo self priming pumps
pedrollo self priming pumps pedrollo self priming pumps available in South Africa Self priming pumps by Pedrollo available in South Africa are of the JSW series. The JSW 1, 2 and 3. The self priming system developed by Pedrollo is the internal venturi Jet system. Sometimes these units are called jet pumps and are widly used for fresh water extraction form well points or shallow wells. These units operate by internally circulating one third of the water into the impeller eye via a venturi priming system. Pedrollo South Africa provides this range of product predominently to domestic users. The venturi self priming systems are capable of efficiently drawing from depths up to 8 meters at sea level. The Pedrollo self priming pumps stocked in South Africa are both cast Iron and stainless steel versions of the venturi priming system. Please call our sales team for further assistance with your pump selection. sales@pedrolpumps.com support@pedrolpumps.com Phone +27 31 777 1629
Pedrollo pump catalogue
Pedrollo pump catalogue The Pedrollo pump catalogue includes our high quality, in demand, water pressure pumps. The Pk series peripheral impeller design is very popular in small pump systems. CLICK here In South Africa, with our recent water shortages it has almost become a necessity to install grey water or rain water systems. Pedrollo water pumps for pressure pump purposes are a great option for the small home, garden, irrigation or car wash system. A water tank with a water pump completely equips the homeowner with a basic water supply system which is capable of processing grey water and harvested rain water. While Pedrollo provides a centrifugal pump for most small applications the pressure pump market demands reliability and quality. The Pedrollo pump design studio in Italy is fully equipped to research and manufacture pumps which are extremely efficient. Our pumps are sought after in all countries of the world because of their reliability and low cost of ownership. Pedrollo Contacts for South Africa emails:- For help with pump selection and pricing sales@pedropumps.com For assistance with supply or any further information support@pedropumps.com
Pedrollo submersible water pumps
Pedrollo Submersible Water Pumps Pedrollo submersible water pumps have many options from our water pumps catalogue please phone +27 31 777 1629 for service or email support@pedropumps.com Having moved our web presence from our well supported old site www.pedrollopumps.com, we were very apprehensive that folk looking for Pedrollo pumps would not find us. However the site seems to be ranking even though we have not been able to completely load all our products yet. Pedrollo submersible pump options are as follows:- Centrifugal pumps Submersible well pumps are centrifugal pumps, some of multistage design, others are single impeller units. Our Pedrollo 4 SR range is a borehole pump (deep well) and is fully supported from our warehouse in Durban and Cape Town, South Africa. Our Johannesburg distribution is being established this year 2016. When it comes to requiring an industrial pump for effluent, sewage or simple water pump duty, Pedrollo has a unit for your application. Most sewage pumps fall under our submersible pumps series and we have just completed a major upgrade to many of our models. These sewage pumps are suitable for handling fluids with entrained solids and fibrous materials. Equipped with silicone carbide seals the units are designed for efficiency and longevity. In terms of the electric water pump market sump pumps make up a relatively large volume of pump types used. Sump pumps typically mount inside a sump and are found to be transferring various industrial waste fluids, reliably and consistently over long periods of time without needing major maintenance or service. A variation on the standard type of sump pump is the TOP series and the RX series which channel the fluid being pumped over the motor. This design allows the pump to draw fluid far lower in the sump, cooling the motor and avaiding frequesnt overheating issues that can present problems in other types of submersible sump pumps. Call us for more information or assistance with your application. 031 777 1629
water pump selection tips
How to select a water pump for my needs? Some useful information on “how to select a water pump for my needs” follows. Before one starts to determine which pump is the best type of pump or the correct size etc., there is basic information you need to know. This post is our tip on the basics you need when enquiring about your pump needs. Guidelines for your enquiry:- Pump fluid flow rate in litres per minute. Static Head, the highest point to which the pump must elevate the fluid is known as static head. It is measured from the centre body of the volute casing to the maximum vertical height of the discharge pipe above the pump. Friction Head, the friction loss that the fluid will develop while travelling through the pipe system. In terms of water this is easily determined by consulting a friction loss curve. You will need to know the total length of the pipe and the internal diameter of this pipe. Another piece of information you will need is the suction conditionyou expect the pump to operate with, is it flooded (water level above pump centre body) self priming (pump is above water level) Submersible (pump is located inside the water body? Once you have this basic information, you are ready to send your mail or make a call to sales as per the contact details above. Email sales@pedropumps.com or support@pedropumps.com for a full quotation with technical detail.
The pump to select?
The pump to select? How to determine the pump to select? The correct pump. (exit at any time by scrolling to end of this document) A centrifugal pump performance curve is simply a tool which enables anyone to literally see how a pump will perform in terms of HEAD and FLOW. Every pump will be capable of developing a specific PRESSURE (PSI or BAR measurement translated into feet or meters head) at a specific FLOW (normally represented in gallons per minute or liters per minute) A note on establishing flow. If you do not know the flow you require it is relatively simple to determine if you just take it one step at a time and add all the outlets together. For industrial applications, for washing, heating or cooling the equipment will have a flow and pressure on the design plate. Flow in a system can be established by understanding the requirements. In our example we will use a house which has two bathrooms, a dishwasher, a washing machine, an electric geyser in the roof and a guest toilet with hand basin. Also a sink in the kitchen and an outside shower for the pool area. So we have the following outlets :- Bathroom hand basin taps 4 Bath taps 4 Shower taps 6 Toilet cistern 3 Guest basin tap 2 Sink in kitchen 2 Washing machine 1 Dishwasher 1 TOTAL 23 If we assume each tap will be required to deliver 2 gallons per minute (GPM) at 44 PSI or 3 bar, then we simply need to determine how many outlets we would expect to operate at any one time. It is unlikely that all toilets, all showers, all baths etc will be on at the same time. A good method is to take a third of the total outlets as your flow need for any single moment in time. In our example that represents 23 divided by 3 or 7.6 make it 8 outlets. This means a flow requirement of 8 X 2 = 16 GPM or 60 liters per minute. A note on the concept of PUMP HEAD. Think about the highest point of your body, the top of your HEAD. It is the same idea with pump language, Head refers to the measurement in feet or meters from the center line of the pump (the pump shaft center line) to the highest point to which the unit is expected to deliver fluid) The above definition of head is limited to what is known as the Static head. in other words, this is the measurement of the vertical height which should never change, it is static. Lets say you are needing to deliver water from a tank at the bottom of your garden, to the geyser at the top of your roof. The garden has a steep bank from the house to the lower area where the tank is located. The house is a double story. If one measures the height from the base of the tank […]
Pump pressure control system
Pump pressure control system The simple pump pressure control system available from Pedrollo, South Africa has many advantages. We often have the request to assist with the design on systems where water is pumped from a dam. river. pond/ bulk storage to a service tank next to a home etc. The problem seems to occur when the user becomes embroiled in working on complicated control systems and ends up with horrific costs for cable runs or radio telemetry systems. The simplest system to use is to have the pump fitted with either an electronic pressure/flow controller like the Pedrollo Easy Press or a Hyrdrosphere/pressure switch system. Pedrollo Easypress This controller activates if it recognises a flow demand and / or a pressure set point. The really great feature of the Pedrollo Easy Press is that it has a storage vessel to buffer the pressure on/off switch. This buffer zone is fantastic for two purposes, potential dry run operation (lack of water on the suction side of the pump like an empty dam or low water level in the source) and long discharge pipe lengths. This buffer is essential to enable the unit to switch positively and not to instantly switch when the contacts would close and open with oscillating flow. Once one has a pump fitted with an automatic controller the rest is relatively simple. A ball float valve or a solenoid valve at the point of delivery completes the cycle. Basically the pump reacts to the line pressure. In this case the ball float valve in the receiving tank rises and closes the valve, pressure in the line builds and flow slows. As the flow stops with the closed valve condition, the controller (which is located at the pump and can be up to 200 meters away from the pump) stops the pump. Water usage from the tank will drop the water level, the ball float drops with the water level, opening the valve, releasing pressure and generating flow. The controller sees the resultant flow and pressure drop and the pump starts. We do like to use the older technology HYDROSPHERE PRESSURE PUMP systems in long er pipe runs. The size of the hydrosphere must be linked to the pump flow at the operational head of the system. We like this system for very long pipe runs up to a few Km due to the added protection provided to the motor for stop/start conditions. The hydrosphere tends to absorb and delay stopping and starting due to pressure and flow variations in longer pipe runs, small leaks, air entrainment etc. One does need to ensure that the pumps are protected with the correct overload protection. We like to recommend a proper control panel be installed with the pump which includes surge protection. In Southern Africa with power cuts, brown and black outs which can be frequent, it is crucial to ensure the electrical components are adequately protected. The above represents the simplest way of controlling a pump remotely without using […]