Pump Selection, buying the correct Pump?
When requesting a pump, the supplier will need basic information to provide the correct pump selection. This is crucial in terms of selecting the correct pump for HEAD (The maximum height in static lift) and FLOW (Normally in liters per minute). A centrifugal pump performance curve is a useful tool which enables anyone to understand how a pump will perform. The supplier needs to be able to peg your pump duty to a specific pump curve. This will determine the most efficient pump selection for the duty. A pump develops 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). This value is dependent on the design of the hydraulic components of the pump. Pump selection is based on a specific flow in liters per minute to head in meters. A note on establishing flow. If you do not know the flow you require it is relatively simple to determine. Take it one step at a time and add all the outlets (Taps or sprinklers together). For industrial applications, for washing, heating or cooling, the equipment will have a flow and pressure data detailed on the design plate. Flow in a system must be established by understanding the requirement of the entire system. 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. 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 required 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 when speaking pump selection. 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, […]
Static Pump HEAD, what is it?
The Static Pump Head is a term used to indicate the highest point which a pump must deliver a specific volume. Think of the highest point of a persons body. It is the head when standing upright. Static head is the head determined by the vertical height of the pipe system only. This is simply the actual height above the pump center body. Static head is not concerned with the developed back-pressure in the pipeline. There is another aspect that has influence on static pressure. Suction lift When one is drawing water from below the pump, the length of the pipe that extends below the pump to the surface of the water, is also a static measurement. This is known as suction lift and is normally added to the static head. A pump with a 3 meter suction lift and a 50 meter discharge static head will have a combined static head of 53 meters. Beware of Friction Losses The static pump head must not be assumed to be the total head of the pump when selecting a pump. It is important to recognize the other factors that will influence the total head the pump will need to develop. Static head is at best the basic measurement of the demand on the pump. Friction losses and equipment losses will add to this head substantially if the pipe system design is not carried out by a competent person.
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.
water pump selection
water pump selection Water pump selection assistance from Pedrollo pumps South Africa The most common issue a prospective buyer of a water pump for domestic use has is trying to determine the type and model pump to purchas. The major stumbling block is not knowing what to ask for? Where does one start with providing information for the pump supplier in order to have them assist you in determining the type or size of pump you may need. Going through a load of pump data to try to determine the correct unit for your use is time consuming and can become stressful. When things get a little hectic, give us a call or mail us at support@pedropumps.com for assistance. BEFORE YOU MAIL OR CALL….. Here is a quick guide with the information you will need to give your pump suppliers:- Guidelines for your enquiry:- Please have the following information available when requesting a pump quotation. Flow rate, 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. Suction condition Another piece of information you will need is the suction condition you 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. Please email this information for accurate and fast responses.
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 AL RED stainless steel
pedrollo pump al red Pedrollo pump al red model in stainless steel The pdf file can be downloaded here Pedrollo AL-RED_EN_50Hz AL-RED The Pedrollo Stainless steel centrifugal pump model AL Red is specifically designed to handle clean water for use in domestic, industrial, agriculture or aquaculture systems. The unit is an end suction design and is specifically for surface mounting in a flooded suction system. Typical applications would include water supply systems, fruit and vegitable washing, laundry water supply, water treatment plants, small greenhouse or external irrigation systems. In South Africa these units are also used by small fruit juice manufacturers for both mixing and decanting of the mixing systems. Coupled to our GM Mixers (request information) this pump makes the ideal equipment mix for the small fruit juice, detergent or laundry liquid softner manufacturer. Please email our technical help line for more information :- support@pedropumps.com
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.
Pedrollo PKm 60 domestic pressure pump
Pedrollo PKm 60 pump The Pedrollo PKm 60 pump is the smallest peripheral impeller pump manufactured by Pedrollo, Italy. The relatively high pressure, low flow water pump is deal for small boilers and water transfer applications. This small 1″ PKm 60 pump with a one inch inlet and outlet fluid port is the choice for small pressure boosting systems. Many water tanks in South Africa are equipped with the Pedrollo PKm 60. Pedrollo PK series for small scale irrigation The pump is ideal for driving two taps on at any one time. Small gardens and irrigation systems benefit from the units relatively high pressure supply especially for sprinklers. Peripheral Impeller Pedrollo PKm 60 leads the series in terms of volume of sales. This popular small pump has been copied but never equaled by many other manufacturers. The peripheral impeller functions like a turbine with cupped vanes on the periphery of a disc. One of the characteristics of this unit is that it does not handle solids at all. The close tolerances between the pump body and the impeller disc necessary for high pressure, cannot handle any form of solid particle. Use of these pump units is strictly limited to very clean water or other fluids. Solar water transfer The Pedrollo Pk series and especially the smaller motors are available in 220 volt, 3 phase. This is ideal for coupling the unit to an inverter and especially for solar systems. Typically solar systems are built in two major configurations, those that use batteries and those that don’t. The PK range of 3 phase peripheral pumps because of their relatively high heads and low power consumption are perfect. Pedrollo PKm 60 pump for Hot water The Pk series is capable of handling water to 60 degree C. This makes the pumps a great choice for bath or shower water pressure. There are few small pumps that will drive two taps at such a great pressure as the PK series from Pedrollo.