{"title":"Pump controllers","description":"","products":[{"product_id":"dayliff-superpress-p-2-2kw-pump-controller","title":"Dayliff Superpress P 2.2KW Pump Controller","description":"\u003cp\u003eHigh specification in-line electronic pump controllers for automatic operation of pressurised water supplies.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eFeatures include:-\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStarts pump on pressure or through the flow sensor (minimum 1.5litres\/min)and stops on low flow. The\u003cbr\u003econtroller automatically senses the pipe pressure and regulates the starting pressure\u003c\/li\u003e\n\u003cli\u003eDry run protection provided and restart when supply returns (positive suction)\u003c\/li\u003e\n\u003cli\u003eIncorporates a spring activated hydraulic accumulator to control pump cycling\u003c\/li\u003e\n\u003cli\u003eLED power on, pump run, dry run indicators and delay timer\u003c\/li\u003e\n\u003cli\u003eSettable delay timer for tank filling (P)\u003c\/li\u003e\n\u003cli\u003eBuilt in pressure gauge for pressure monitoring (P\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMax Motor size: \u003c\/strong\u003e2.2kW\/1ph\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMax Current: \u003c\/strong\u003e\u003c\/em\u003e10A\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eProtection:\u003c\/strong\u003e\u003c\/em\u003e IP65\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMax Operating Pressure: \u003c\/strong\u003e\u003c\/em\u003e10 Bar\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eConnection: 1''M Voltage: \u003c\/strong\u003e\u003c\/em\u003e90-260V\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eDimensions (L\/W\/H):\u003c\/strong\u003e\u003c\/em\u003e 192x140x90mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e⚠️ \u003c\/span\u003e\u003cb\u003eSAFETY NOTE\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ci\u003e\u003cb\u003eElectrical installations should be carried out by a qualified technician.\u003c\/b\u003e\u003c\/i\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cb\u003eHandle chemicals with care as they are hazardous.\u003c\/b\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Davis \u0026 Shirtliff","offers":[{"title":"Default Title","offer_id":51537822056738,"sku":"PC-2P","price":50000.0,"currency_code":"RWF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/1162\/5250\/files\/DAYLIFF_SUPERPRESSCON_P.jpg?v=1776254377"},{"product_id":"dayliff-superpress-s-2-2kw-pump-controller","title":"Dayliff Superpress S 2.2KW Pump Controller","description":"\u003cp\u003eHigh specification in-line electronic pump controllers for automatic operation of pressurised water supplies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFEATURES \u0026amp; BENEFITS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFeatures include:-\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStarts pump on pressure or through the flow sensor (minimum 1.5litres\/min)and stops on low flow. The\u003cbr\u003econtroller automatically senses the pipe pressure and regulates the starting pressure\u003c\/li\u003e\n\u003cli\u003eDry run protection provided and restart when supply returns (positive suction)\u003c\/li\u003e\n\u003cli\u003eIncorporates a spring activated hydraulic accumulator to control pump cycling\u003c\/li\u003e\n\u003cli\u003eLED power on, pump run, dry run indicators and delay timer\u003c\/li\u003e\n\u003cli\u003eSettable delay timer for tank filling (P)\u003c\/li\u003e\n\u003cli\u003eBuilt in pressure gauge for pressure monitoring (P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax Motor size: \u003c\/strong\u003e2.2kW\/1ph\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMax Current: \u003c\/strong\u003e\u003c\/em\u003e10A\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eProtection:\u003c\/strong\u003e\u003c\/em\u003e IP65\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMax Operating Pressure: \u003c\/strong\u003e\u003c\/em\u003e10 Bar\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eConnection: 1''M Voltage: \u003c\/strong\u003e\u003c\/em\u003e90-260V\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eDimensions (L\/W\/H):\u003c\/strong\u003e\u003c\/em\u003e 192x140x90mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e⚠️ \u003c\/span\u003e\u003cb\u003eSAFETY NOTE\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ci\u003e\u003cb\u003eElectrical installations should be carried out by a qualified technician.\u003c\/b\u003e\u003c\/i\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cb\u003eHandle chemicals with care as they are hazardous.\u003c\/b\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Davis \u0026 Shirtliff","offers":[{"title":"Default Title","offer_id":51537824055586,"sku":"PC-2S","price":40000.0,"currency_code":"RWF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/1162\/5250\/files\/Controller.jpg?v=1776254425"},{"product_id":"varem-ks-kit","title":"Varem KS Kit","description":"\u003cp\u003ePressure tanks are important components of pressurized booster supply systems where automatic pumped water supply is provided by means of pressure switch controlled pumps. The tanks have two functions; to cushion pressure surges as the pump starts and stops and also to provide a drainage supply into the system to control pump cycling\u003c\/p\u003e\n\u003cp\u003eVAREM pressure tanks have been specially designed for pressurized booster installations and are also suitable for fire fighting and irrigation systems. The design incorporates a replaceable butyl rubber membrane which offers the following features:-\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for all types, including corrosive and hard, waters as the water only comes into contact with the membrane.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMembrane design eliminates the necessity for constant air recharging.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHorizontally collapsing membranes (except KS model) avoids contact with tank sides and therefore increases life.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMembrane is simply replaceable.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVAREM pressure tanks are quality products approved by a number of international standards organizations. They are the ideal solution for all pressured water supply installations and if properly selected will provide many years of maintenance free operation.\u003c\/p\u003e\n\u003cstrong\u003eFEATURES \u0026amp; BENEFITS\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003ePressure Tank Sizing Guide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCorrect tank sizing is important and is determined by the system flow rate and pump start and stop pressure settings\u003c\/p\u003e\n\u003cp\u003eSizing must be based upon the system flow at which the maximum cycle frequency occurs. As a rule of thumb this can be taken as 65% of the flow at pump stop pressure.\u003c\/p\u003e\n\u003cp\u003eRequired draining volume is then the maximum cycle frequency flow divided by twice the specified maximum number of cycles per hour. Generally 60 cycles per hour is considered acceptable. Tank size selected is then that nearest to the volume required. Drainage volume is as follows:-\u003c\/p\u003e\n\u003ctable class=\"table table-bordered\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTank Pre-charge (Bar)\u003c\/td\u003e\n\u003ctd\u003e1.35\u003c\/td\u003e\n\u003ctd\u003e1.65\u003c\/td\u003e\n\u003ctd\u003e1.85\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e2.35\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e2.35\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e2.83\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e3.85\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e4.85\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump Start Pressure (Bar)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump Stop Pressure (Bar)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrainage (%)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan\u003eTank Model\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"8\"\u003e\u003cspan\u003eDrainage Volume (Litres)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKS (24 Litres)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\n\u003cp\u003eNote that when specifying pressure systems the following is important:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCorrect tank precharge is critical and must be 0.15 Bar below the pump start pressure. Efficiency is greatly reduced if pre-charge is either too high or too low.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnsure that the difference between start and stop pressure is as high as possible as the larger the differential the greater the tank drainage capacity.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnsure the pump start pressure is higher than the system static pressure or else the pump will not start.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAdjust pump stop pressure to be about 90% of the pumps closed head pressure.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePump Stop Pressure = 4.5, Bar Stop Flow = 11m\u003csup\u003e3\u003c\/sup\u003e\/hr\u003c\/p\u003e\n\u003cp\u003ePump Start Pressure = 2.5 Bar Start Flow = 16m\u003csup\u003e3\u003c\/sup\u003e\/hr\u003c\/p\u003e\n\u003cp\u003eSystem flow at maximum cycle frequency = 65% of Pump Stop Flow = 0.65x11=7.2m\u003cspan\u003e3\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\/hr or 7200l\/hr Max Cycle frequency = 60cycles\/hr therefore required drainage volume = 7200\/60x2=60 litres\u003c\/p\u003e\n\u003cp\u003eFrom table 100 litre tank has drainage volume of 34 litres at defined pressures. 300 litre tank has drainage volume of 103 litres at defined pressures.\u003c\/p\u003e\n\u003cp\u003eTherefore select either 2x100 litre tanks (68 litres drainage volume) or 1x300 litre tank (103 litres drainage volume).\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-bordered\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eTank Data\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eKS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume (Litres)\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Pressure (Bar)\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet DN\u003c\/td\u003e\n\u003ctd\u003e1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (mm) - DN\u003c\/td\u003e\n\u003ctd\u003e360\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (mm) - H\u003c\/td\u003e\n\u003ctd\u003e335\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (mm) - H1\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (kg)\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Volume (m3)\u003c\/td\u003e\n\u003ctd\u003e0.047\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Davis \u0026 Shirtliff","offers":[{"title":"Default Title","offer_id":51537838080290,"sku":"KS KIT","price":167796.0,"currency_code":"RWF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/1162\/5250\/files\/VAREM-800x600.jpg?v=1776254787"},{"product_id":"global-max-24l-10bar-pressure-kit","title":"Global Max 24L 16bar Pressure Kit","description":"\u003cp\u003ePressure vessels are important components in automatic booster systems, the vessels cushioning pressure surges as the pump starts and stops and also provide drainage supply in to the system to reduce pump cycle frequency.\u003c\/p\u003e\n\u003cp\u003eDAYLIFF Global Max pressure tanks are high specification units that are suitable for high pressure applications and include the following features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuper thick steel construction with polyurethane and epoxy painted paint finish for corrosion protection\u003c\/li\u003e\n\u003cli\u003ePolypropylene liner so tanks can be used for corrosive and hard waters\u003c\/li\u003e\n\u003cli\u003eSpecial diaphragm and air valve design that eliminates air leaks and the need for maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDAYLIFF Global Max pressure tanks are comprehensively tested and quality approved by a number of international standards organisations and are also FDA food grade approved pressure tanks. They are the ideal solution for all high specification water booster applications and will provide many years of maintenance free operations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFEATURES \u0026amp; BENEFITS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRESSURE TANK SIZING GUIDE\u003c\/strong\u003e\u003cbr\u003eCorrect tank sizing is important and is determined by the system flow rate and pump start and stop pressure settings. Sizing must be based upon the system flow at which the maximum cycle frequency occurs. As a rule of thumb this can be taken as average flow between the cut-in and cut-out flow rates.\u003c\/p\u003e\n\u003cp\u003eRequired drain volume is then the maximum cycle frequency flow divided by twice the specified maximum number of cycles per hour. Generally 60 cycles per hour is considered acceptable. Tank size selected is then that nearest to the volume required. Some selected examples are as follows;\u003c\/p\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"table table-striped table-bordered table-hover table-sm\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump Start Pressure (bar)\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump Stop Pressure (bar)\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrainage %\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e41\u003c\/td\u003e\n\u003ctd\u003e43\u003c\/td\u003e\n\u003ctd\u003e43\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTank Model\u003c\/td\u003e\n\u003ctd colspan=\"7\"\u003eDrainage Volume (Litres)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS 24Litres\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS 60Litres\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS 100Litres\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e41\u003c\/td\u003e\n\u003ctd\u003e43\u003c\/td\u003e\n\u003ctd\u003e43\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS 300Litres\u003c\/td\u003e\n\u003ctd\u003e84\u003c\/td\u003e\n\u003ctd\u003e93\u003c\/td\u003e\n\u003ctd\u003e123\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e179\u003c\/td\u003e\n\u003ctd\u003e135\u003c\/td\u003e\n\u003ctd\u003e87\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eCorrect tank precharge is critical and must be 0.2 Bar below the pump start pressure for pressure switch systems or 65% of the pump stop pressure for variable speed systems. Efficiency is greatly reduced if precharge is either too high or too low.\u003cbr\u003eEnsure that the difference between start and stop pressure is as high as possible as the larger the differential the greater the tank drainage capacity.\u003cbr\u003eEnsure the pump start pressure is higher than the system static pressure or else the pump will not start.\u003cbr\u003eAdjust pump stop pressure to be about 90% of the pumps closed head pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE\u003c\/strong\u003e: Oversizing tank size has many advantages including reduced energy consumption, reduced cycling, extended pump life due to reduced wear and reduced noise. As a rule doubling the calculated size will bring substantial benefits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSELECTION EXAMPLE\u003c\/strong\u003e\u003cbr\u003eSystem Parameters\u003cbr\u003e\u003cstrong\u003ePump Start Pressure\u003c\/strong\u003e: 5 Bar\u003cbr\u003e\u003cstrong\u003ePump Stop Pressure\u003c\/strong\u003e: 10 Bar\u003cbr\u003e\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e:90°C\u003cbr\u003e\u003cstrong\u003eStop Flow\u003c\/strong\u003e: 5m³\/hr\u003cbr\u003e\u003cstrong\u003eStart Flow\u003c\/strong\u003e: 10m³\/hr\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRequired Drainage Volume\u003c\/strong\u003e: = Average Flow Rate \/ (start per hour x 2) e.g. 7500ltr\/hr \/ (60 starts\/hr x 2) = 63litres\u003cbr\u003e\u003cstrong\u003eDrainage % based on start\/stop pressure as per table\u003c\/strong\u003e: 43%\u003c\/p\u003e\n\u003cp\u003eRequired Tank Volume = Required Drainage Volume \/ Drainage % e.g. 63 \/ 0.43 = 146litres\u003cbr\u003e\u003cstrong\u003eTank Specification:\u003c\/strong\u003e Use 2x100litres or 3x60litres\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTank Data\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"table table-striped table-bordered table-hover table-sm\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003eModel\u003c\/td\u003e\n\u003ctd rowspan=\"2\"\u003eMax. Pressure (bar)\u003c\/td\u003e\n\u003ctd rowspan=\"2\"\u003eType\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eDimensions\u003c\/td\u003e\n\u003ctd rowspan=\"2\"\u003eWeight (kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003eC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS24\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003eDiaphragm\u003c\/td\u003e\n\u003ctd\u003e447\u003c\/td\u003e\n\u003ctd\u003e293\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS60\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003eDiaphragm\u003c\/td\u003e\n\u003ctd\u003e620\u003c\/td\u003e\n\u003ctd\u003e390\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS100\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003eDiaphragm\u003c\/td\u003e\n\u003ctd\u003e804\u003c\/td\u003e\n\u003ctd\u003e431\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS300\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003eBladder\u003c\/td\u003e\n\u003ctd\u003e1511\u003c\/td\u003e\n\u003ctd\u003e534\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e79\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGWS300\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003eDiaphragm\u003c\/td\u003e\n\u003ctd\u003e1230\u003c\/td\u003e\n\u003ctd\u003e640\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e79\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e⚠️ SAFETY NOTE\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eElectrical installations should be carried out by a qualified technician.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eHandle chemicals with care as they are hazardous.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"Davis \u0026 Shirtliff","offers":[{"title":"Default Title","offer_id":51537838113058,"sku":"GWS024","price":270810.0,"currency_code":"RWF","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/1162\/5250\/files\/PressureKit.webp?v=1776254788"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/1162\/5250\/collections\/pumpcontrollers.jpg?v=1776157600","url":"https:\/\/shop.rwanda.davisandshirtliff.com\/collections\/pump-controllers.oembed","provider":"Davis \u0026 Shirtliff Rwanda","version":"1.0","type":"link"}