Double Diaphragm Pumps- Brochure

diaphragm pumpsVERDERAIR VA 40VERDERAIR double diaphragm PumpsThe next generationVERDERAIR is the name given to a complete, well balanced series of air operated double diaphragm pumps. The VERDER Group consists of a number of technical trading and production companies actively engaged in the areas of liquid, dry and synthetic materials technology. Since the formation of the group at the end of the 1950s, the delivery programme has been determined largely by the demand for leak free pumps, so that in the 1990s a change took place in the direction of the group: what started life purely as a trading company has changed with the takeover of some well-known pro-duction companies and with constant research and development into the VERDER group which aims at becoming a major industrial supplier for the market segments already men-tioned. During the 1970s VERDER was the first company to supply air operated double diaphragm pumps to both the process industry and to equipment suppliers. The original trading partner, failed however, to produce the necessary technological advances. As a result VERDER had to assume the responsibility for the deve-lopment of its own product line; this has had the added advantage that the feedback of information from the market-place can be assimilated much more quickly and effectively with a view to future developments. Naturally, in a period of some 30 years a considerable quantity of products have been delivered, so that with the current develop-ments the emphasis must be laid on interchangeability, particularly in the area of dimensions. Qualitative improvements must be seen as a natural consequence, so that all products now carry a 2-year European guarantee. VERDER continues to invest in the development of air operated double diaphragm pumps with the aim of being able to supply high quality products which can effectively compete in price with conventional pumps,and has as a motto: simple by design and at this moment steps are being taken to reach this goal. Further on in this brochure you will find a list of all available products with a technical description of each type, together with examples of applications for both metallic and non-metallic pumps.VERDERAIR VA 10The advantages of VERDERAIR pumps:• easy installation• screwed chambers for safe operation • rugged, cast feed mounting holes keep your pump from vibra-ting• available as cover-mounted, pail-mounted or wall-mounted units• immersible in most situations• easy to adapt• A large scale of material options for fluid versatility with exten-ded pump life• air powered convenience for use in a variety of installations with no electrical hazard• performs on-demand in remote locations• extremely portable for multi-location use• pumps move a wide variety of coatings, solvents, viscosity sealants, adhesives, inks, acids and more• easy to maintain• seal-less, leakproof design prevents fluid waste and mess• even in wet air, the stainless steel diaphragm rod air motor is designed for long life and corrosion resistance• easy to operate• pumps reduce or eliminate manual filling and transport• reduces the risk of hazardous spills and employee exposure• multiple dispense points throughout your plant can easily be served.• can run dry without pump damage• no air lubrication necessary.Basic Principle of Air-operated Diaphragm PumpsVERDERAIR VA 50VERDERAIR VA 8The VERDERAIR diaphragm pump is an air-operated, positive dis-placement, self priming pump. These drawings show the flow pat-tern through the pump upon its initial stroke. It is assumed the pump has not been primed prior to its initial stroke.1 The air valve directs pressurized air to the back side of diaphragm 1. The compressed air is applied directly to the liquid column separated by elastomeric diaphragms. The diaphragm acts as a separation membrane between the compressed air and the liquid. Driving the diaphragm with air instead of the shaft balances, the load and removes mechanical stress from the diaphragm, dramatically extending diaphragm life. The com-pressed air moves the diaphragm away from the center block of the pump. The opposite diaphragm is pulled in by the shaft connected to the pressurized diaphragm. Diaphragm 2 is now on its air exhaust stroke; air behind the diaphragm has been forced out to the atmosphere through the exhaust port of the pump. The movement of Diaphragm 2 toward the center block of the pump creates a vacuum within chamber 2. Atmospheric pressure forces fluid into the inlet manifold forcing the inlet ball valves off its seat. Liquid is free to move past the inlet ball valves and fill the liquid chamber.2 When the pressurized diaphragm, diaphragm 1 reaches the limit of its discharge stroke, the air valve redirects pressurized air to the back side of diaphragm 2. The pressurized air forces diaphragm 2 away from the center block while pulling diaphragm 1 to the centre block. Diaphragm 2 forces the inlet ball valves onto its seat due to the hydraulic forces developed. These same hydraulic forces lift the discharge ball valves off its seat, while the opposite discharge ball valves is forced onto its seat, forcing fluid to flow through the pump discharge. The movement of diaphragm 1 to the center block of the pump creates a vacuum within the liquid chamber 1. Atmospheric pressure forces fluid into the inlet manifold of the pump. The inlet ball valves is forced off its seat allowing the fluid being transferred to fill the liquid chamber.3 Upon completion of the stroke, the air valve again redirects air to the back side of diaphragm 1, and starts diaphragm 2 on its air exhaust stroke. As the pump reaches its original starting point, each diaphragm has gone through one air exhaust or one fluid discharge stroke. this contstitutes one complete pumping cycle. The pump may take several cycles to become completely primed depending on the conditions of the application.12Diaphragms are pressure balanced to ensure longer life. High-pres-sure, high efficiency operation is achieved by the pump’s unique design. Suction and discharge valves can be either ball valve or cylindrical valve.Ball ValvesBall valves are simple and robust in design, giving a low pressure drop on the passing flow and therefore giving a higher flow than cylindrical valves. Ball valves are also able to handle liquids with solids in supension, because they have only a line sealing with the conical seat. Cylindrical valvesCylindrical valves have a surface sealing which creates a perfect sealing, even with hard valve materials like PTFE, and therefore have very good dry suction capability. Cylindrical valves close more smoothly and equally. This makes a pump with cylindrical valves used as a dosing pump more accurate than a pump with ball valves.Air valveThe entire air valve is maintenance and stalling free, and requires no lubrication. The air valve is built from only a few components, is servicable and can be inspected without disassembling the fluid connections.Accessories1 Pulsation dampenerOscillating pumps produce an oscillating flow. The design of the VERDERAIR double diaphragm pump gives a smooth and greatly reduced flow pulsation. A constant steady flow can be achieved by using the Pulstech pulsation dampener.2 Diaphragm rupture systemIn case of a diaphragm rupture, liquid can come out via the air exhaust. This can cause personal injury or environmental damage. To prevent this, a diaphragm rupture system should be installed, which can stop the pump and/or sound an alarm. PULSTECHSeries VERDERAIR VAHighly engineered diaphragm pumps, delivering a smooth, reliable flow at all circumstances. The new air valves design guaran-tees a perfect, non-stalling operation, even at low pressure and does not need any lubrication. Thanks to their unique design, they are able to handle very abrasive and / or viscous products. The VERDERAIR VA will run dry indefinitely without damage. VERDER has selected those materials which offer the best combination of benefits to the end user. The used wetted pump part materials are Acetal, Polypropylene, Kynar, Aluminium, Cast Iron and Stainless Steel. For ball and /or diaphragm, VERDER selected PTFE, Hytrel, Santoprene, Viton, BUNA-N, SS and Acetal.The flow range is from 0.1 up to 1050 l/min and pressures up to 8,4 bar.Applications:• drum transfer• circulation of low/high viscosity inks, stains and dyes• waste fluid removal from quench tanks, sumps and spray booths• process transfer filling and emptying process vessels and mixing tanks• slurries and sludges• food transfer• ceramics• truck unloadingVERDERAIR VA 40Automotive IndustryGrinding emulsion, oil, coolant, hydraulic fluid, sulp-huric acid, automotive primer, soluble oil, varnish dis-posal, varnish additives, degreasing baths, cutting oil, ware and glycol mixture, paintAviationAircraft fuelling and drainage, satellite refuelling, solid rocket propellant, missile silosBeveragesYeast, diatomaceous earth slurry, dregs, hot pulp, liquid hops, sugar syrup, concentrates, gas-liquid mix-tures, wine, fruit pulp, fruit juice, corn syrupCeramicsSlip, glaze, enamel slip, effluent, clay, clay slurry, lime slurry, kaolin slurryChemical IndustryAcids, alkalites, solvents, suspensions, dispersions, magnesium hydroxide, varnishes, sump water, resins, latex, adhesives, effluent sludge, stabilizers, filter press, electrolitesConstruction IndustrySump and pit drainage, cement slurry, ceramic tiles adhesive, rock slurry, ceiling coating paints, texture sprayCosmeticsLotions, creams, shampoos, emulsions, hand creams, surfactants, hair permanents, soapsElectronic industrySolvents, electroplating baths, ultrapure liquids, car-rier fluids for ultrasonic washing, sulfuric, nitric and acid wastes, etching acids, MEK, acetone, polishing compoundsFoodBrine, chocolate, vinegar, molasses, dog food, vegeta-ble oil, soy bean oil, honey, cat food, HCl, animal blood.Furniture IndustryAdhesives, varnishes, dispersions, solvents, stains, Elmers Glue, white wood glue, solvents, glue (5-6000 cps) epoxy, starch adhesives, spray packagesMiningSump gallery drainage, sewer cleaning, coal sludge and rock slurry, cement slurry, grouting mortar, oil transfer, explosive slurry, adhesives, lube oil, foaming.MunicipalitiesTank and sump drainage, sewer cleaning chemicals, contaminated surface water, emergency pumping, spill clean-up, waste-oil, oil/water separatorsPaint and coatingsResins, solvents, acrylic, wood preservative stain, con-crete paints, varnishes, titanium dioxide slurry, pri-mers, stains, dispersions, varnish cleaning baths, alkaloi resin.Pharmaceutical IndustryVegetable extracts, tablet pastes, ointments, alco-hols, filtering aids, ultrafiltration, blood plasma, waste solvents, sump waste.PlatingAnodic sludge, electroplating baths, varnishes, ena-mels, solvents, cleaning baths, filtering.Pulp/Paper/PackagingLatex, adhesives, paints, resins, printing inks, disper-sions, TiO2 slurry, Kaolin clay, hydrogen peroxideRefineriesTank roof drainage, oil sludge, tank cleaning, tank moat drainage, portable pumpingRoad Tanker TrucksLoading and draining of tank by means of pump on vehicle, tank vehicle washing facilities, acid spraying, foamingShipbuildingTank and bilge drainage, ship cleaning, stripping, oil skimming, seawaterSmelters, Foundries and Dye CastingMetal slurry, hydroxide and carbide slurry, dust scrub-bing slurry, back wash for flushing of cores, mould release.Textile and CarpetDyeing chemical, Scotchguard*, starch and sizing, resins, dyes, latexWater and sewage treatmentMilk of lime, thin slurry, effluents, chemicals, charging of filter presses, polymer, waste waterUtilityContaminated liquids, charging of scrubbers, milk of lime, transformer oil, resinsApplication Areas for VERDERAIR Diaphragm Pumps Typical Applications for VERDERAIR diaphragm pumpsVERDERAIR VA non-metallicFrom the paint industry we had a question for a solution for dosing 15 di?erent colours of paint and 1 varnish for creating di?erent colours of paint. a mixing machine. Each pump is dosing a certain quantity of paint, so each colour can be manufactured exactly according to Pantone and RAL standards. The pumps dose between 100 grams and 5 kg. VERDERAIR was chosen because of its compact size, good self priming, non-stalling capabilities and perfect dosing capacity.VERDERAIR VA metallicA VERDERAIR VA 25 is used for spraying ceramics and enamel. Because of the abrasive product, VERDER selected an aluminium pump with special hardened seats. This gave a perfect result over a long period of time. Because of spraying enamel on ceramics we were not allowed to have any pulsations in the enamel spray. Toge-ther with the Pulstech pulsation dampener we created a pulsation of enamel on all the ceramics and brought down the number of substandard products.VERDERAIR VA 10VERDERAIR VA 50Available at www.appliedpumps.co.ukApplied Pumps Ltd Tel 1: +44 (0) 870 874 3334Unit 11 Tel 2: +44 (0) 1246 260 102Cobnar Wood Close Fax 1: +44 (0) 870 874 3335Sheepbridge Industrial Estate Fax 2: +44 (0) 1246 260 103Chesterfeld Email: info@appliedpumps.co.ukS41 9RQ