In many purposes within the oil and fuel industry, the chemical trade, or even the food industry, pumps that work reliably and supply excessive efficiency are wanted. At the identical time, they should have convincingly low investment costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has offered a cost-attractive and safe mannequin that may handle move rates of up to 300 l/h for many years. For use in purposes with higher circulate rates, the pump expert from Leonberg, Germany, is now expanding its product vary with two new sizes. In addition to the LCA version, the Ecosmart may even be out there in the extra highly effective LCC and LCD versions in the future. While the LCC model can meter in excess of 264 gallons per hour, Lewa designed the LCD for a circulate price of as a lot as 528 gallons per hour. The most permissible operating strain for each fashions is 50 bar and 600 kilos respectively. The stringent use of comparable elements throughout the Ecosmart product family retains production costs and subsequently the final worth low. At the identical time, a excessive level of safety could be assured by focusing on all important design options such as the stress aid valve or the proven sandwich diaphragm with continuous monitoring. The LCC variant was made obtainable at the end of 2021 and the LCD mannequin might be available by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow sequence, Lewa has offered the less expensive Ecosmart pump for a quantity of years. This is principally as a end result of the fact that although a reliable pump unit is required in numerous processes, at the same time comparatively low discharge pressures within the decrease two-digit vary require much less complicated pump know-how. With เกจวัดแรงกด within the single pump model, nonetheless, only a flow price of below eighty gallons per hour was beforehand potential. In order to have the ability to provide the Ecosmart for purposes with greater circulate charges, the engineers at Lewa began creating two extra, larger pump variants in 2019. The purpose was to scale up the Ecosmart to larger purposes with the confirmed security stage and high quality Lewa elements with out significantly increasing the low investment value typical for this pump collection. This was to be achieved by a constant modular precept inside the pump sequence, in addition to a strict concentrate on the essential capabilities and features. The specs additionally demanded the usual Lewa suitability for unrestricted continuous operation over many years. Options for integrating the pumps into automated techniques by way of analog control signals or bus systems are additionally a matter of course.
Lewa Ecosmart LCC3 on the test stand.
ADJUSTMENT OF PLUNGER DIAMETER AND STROKE ENABLE MORE FLOW
First of all, the requirements for the conveying capability needed to be applied constructively. Larger plunger diameters have been chosen for the smaller LCC variant, in order that greater than 264 gallons per hour could be conveyed as an alternative of less than 80 gallons. In the case of the extra powerful LCD model, the engineers also determined to extend the stroke length so that a most flow fee of 528 gallons per hour might be achieved. Both pump sorts can work in opposition to a maximum operating pressure of 50 bar. As with all hydraulically actuated diaphragm metering pumps, maximum pressures are achieved with smaller plunger diameters.
Just as necessary because the efficiency of the pump was the operational reliability typical of Lewa acquainted from other pump collection. For this objective, particular person, important options such as the built-in strain security valve or the sandwich diaphragm have been taken over from the Ecoflow models. The individually adjustable strain safety valve ensures that sudden overpressure in the pump doesn’t harm the diaphragm or pump drive. The diaphragm safety system DPS, whose essential component is a return spring for the diaphragm, also ensures that the PTFE sandwich diaphragm always works in the proper place. It cannot be overstretched or damaged throughout start-up. Thus, the pump is protected towards operating errors or upset operating conditions. Finally, the usual diaphragm monitoring system checks the condition of the diaphragm and warns plant operators instantly if there’s any damage. This reliably prevents cross-contamination between the pump and the piping system and ensures operational safety at all times, especially in delicate areas with poisonous fluids. However, diaphragm monitoring isn’t used because Lewa diaphragms of this collection usually obtain service lives of several years – even under full load and steady operation.
A key point was to keep manufacturing prices within a similar vary to the small LCA variant, thereby creating engaging market prices for purposes with much less demanding necessities and decrease working stress. To do so, the design of the two new pump sizes wanted to combine components which would possibly be as equivalent or a minimal of comparable as possible so as to avoid high manufacturing prices. In this fashion, the Lewa engineers have been capable of successfully implement the widespread parts strategy that had already been practiced many instances.
Pump users also benefit from this intelligent modular precept, as many wear parts can be used across pump sorts. This significantly simplifies the spare components stock. At the same time, the modular precept additionally allows particular person adjustments to the respective utility. For example, stroke frequencies or plunger diameters can be selected individually. The foundation for that is the M900 pump head, which is already used in the LCA variant and in the Ecoflow program.
Lewa Ecosmart LCC in heated cabinet.
GOOD INTEGRABILITY FOR PLANT CONSTRUCTION COMPANIES
The pump’s flexibility additionally provides benefits for plant building: It allows the Ecosmart pump to be oriented both vertically or horizontally, making it simpler to combine the unit into systems with limited or confined areas. In addition, the pump head of the new LCC and LCD models is aligned at right angles to the plunger axis, resulting in a particularly compact format. In many pumps, the pump head is on the identical axis because the plunger, which often ends in cumbersome pump dimensions. The 90-degree orientation avoids this with the new fashions. This advantage is achieved by the extremely compact and completely newly developed, cost-effective diaphragm drive.
In order to ensure the long service life typical of Lewa pumps, solely high-quality, sturdy materials are used within the LCC and LCD variations. Toxic and abrasive substances can stress the pump significantly and so a variety of supplies can be used on the wet end, which are also successfully used within the high-pressure variants of the Ecoflow collection. Many high-quality parts from the Ecoflow series are additionally used for the drive items, using the widespread elements technique. The result is robustness and sturdiness that is unusual in this pump class. In addition, all Ecosmart pumps have been designed with a single oil tub, which is used for each the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra complicated lubrication via two separate oil methods and leads to a simpler design, which not solely facilitates operation but also reduces upkeep work.
Last however not least, the new LCC and LCD versions—like the LCA—comply with the us industry commonplace for metering pumps API 675, guaranteeing almost limitless usage for quite a few demanding processes in a variety of industries.
USE IN THE CHEMICAL INDUSTRY
For instance, when metering solvents in the chemical trade, pumps are wanted that on the one hand meet the very best specification necessities and however are nonetheless cost-effective. Here, the Ecosmart pump with its higher performance is in a position to meet precisely these necessities, as it has been exactly engineered for functions within the lower strain vary up to 50 bar (600 pounds). The bigger variations of the Ecosmart pump are also appropriate for industrial water remedy, corresponding to in seawater desalination or industrial cooling circuits. What counts right here above all is compactness and cost-effective design, which the entire Lewa Ecosmart collection fulfills because of its progressive design precept.
Before the model new pump variants can be found to prospects, a variety of extensive checks will be carried out. They will ensure that the items also meet the high inside company requirements for reliability and performance in operational practice. They embody, on the one hand, continuous load exams of up to several tens of hundreds of hours and, however, overload checks. In the latter, the pump is run continuously at up to 20 percent above maximum strain to additional validate its robustness. Special checks are carried out in heated cabinets to proof that the pumps additionally carry out completely under excessive ambient circumstances. After profitable completion of all tests and final adjustments, the Ecosmart model LCC is now on the market, the LCD model will follow in mid-2022.