In many purposes in the oil and gas business, the chemical trade, or even the food trade, pumps that work reliably and provide high performance are wanted. At the identical time, they must have convincingly low funding costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has offered a cost-attractive and secure model that may handle move rates of as a lot as 300 l/h for a couple of years. For use in applications with greater move rates, the pump expert from Leonberg, Germany, is now increasing its product vary with two new sizes. In addition to the LCA model, the Ecosmart will also be available within the more powerful LCC and LCD variations in the future. While the LCC mannequin can meter in extra of 264 gallons per hour, Lewa designed the LCD for a move rate of up to 528 gallons per hour. The maximum permissible operating pressure for both models is 50 bar and 600 kilos respectively. The stringent use of comparable components inside the Ecosmart product household retains production prices and therefore the ultimate worth low. At the identical time, a excessive level of security could be assured by specializing in all essential design features such as the pressure aid valve or the proven sandwich diaphragm with steady monitoring. The LCC variant was made out there at the end of 2021 and the LCD mannequin shall be out there by mid-2022.
In addition to the proven diaphragm metering pumps of the Ecoflow collection, Lewa has supplied the cheaper Ecosmart pump for a quantity of years. This is especially because of the fact that though a reliable pump unit is required in numerous processes, at the similar time comparatively low discharge pressures within the lower two-digit range require much less complex pump technology. With the Ecosmart LCA within the single pump model, nevertheless, only a circulate fee of beneath eighty gallons per hour was previously potential. In order to be able to supply the Ecosmart for purposes with higher circulate charges, the engineers at Lewa started developing two additional, larger pump variants in 2019. The aim was to scale up the Ecosmart to larger purposes with the confirmed security degree and high quality Lewa elements without considerably increasing the low investment price typical for this pump collection. This was to be achieved by a consistent modular precept within the pump sequence, in addition to a strict give attention to the important capabilities and features. The specs additionally demanded the identical old Lewa suitability for unrestricted continuous operation over many years. Options for integrating the pumps into automated systems through analog control indicators or bus methods are also a matter after all.
Lewa Ecosmart LCC3 on the check stand.
ADJUSTMENT OF PLUNGER DIAMETER AND STROKE ENABLE MORE FLOW
First of all, the requirements for the conveying capacity had to be applied constructively. Larger plunger diameters have been chosen for the smaller LCC variant, so that greater than 264 gallons per hour may be conveyed as a substitute of lower than eighty gallons. In the case of the extra highly effective LCD version, the engineers additionally determined to extend the stroke size so that a maximum move price of 528 gallons per hour could be achieved. Both pump sorts can work against a maximum operating strain of 50 bar. As with all hydraulically actuated diaphragm metering pumps, most pressures are achieved with smaller plunger diameters.
Just as essential because the efficiency of the pump was the operational reliability typical of Lewa acquainted from other pump series. For this purpose, individual, important options such as the built-in stress security valve or the sandwich diaphragm have been taken over from the Ecoflow fashions. The individually adjustable stress safety valve ensures that sudden overpressure in the pump does not injury the diaphragm or pump drive. The diaphragm protection system DPS, whose important component is a return spring for the diaphragm, also ensures that the PTFE sandwich diaphragm always works in the right place. It can’t be overstretched or damaged during start-up. Thus, the pump is protected in opposition to working errors or upset working conditions. Finally, the standard diaphragm monitoring system checks the situation of the diaphragm and warns plant operators instantly if there is any injury. This reliably prevents cross-contamination between the pump and the piping system and ensures operational safety at all times, particularly in sensitive areas with toxic fluids. However, diaphragm monitoring is rarely used because Lewa diaphragms of this sequence usually achieve service lives of a number of years – even beneath full load and continuous operation.
A key level was to maintain production prices within an identical vary to the small LCA variant, thereby creating engaging market prices for applications with much less demanding necessities and lower operating pressure. To do so, the design of the two new pump sizes needed to integrate elements which are as equivalent or at least comparable as potential in order to keep away from excessive manufacturing costs. In this fashion, the Lewa engineers had been able to efficiently implement the widespread parts technique that had already been practiced many instances.
Pump users additionally profit from this clever modular principle, as many put on elements can be used throughout pump types. This significantly simplifies the spare elements stock. At the same time, the modular principle additionally allows particular person adjustments to the respective utility. For example, stroke frequencies or plunger diameters could be selected individually. The basis for this is the M900 pump head, which is already used within the LCA variant and within the Ecoflow program.
Lewa Ecosmart LCC in heated cupboard.
GOOD INTEGRABILITY FOR PLANT CONSTRUCTION COMPANIES
The pump’s flexibility additionally presents advantages for plant construction: It permits the Ecosmart pump to be oriented either vertically or horizontally, making it easier to integrate the unit into methods with restricted or confined areas. In addition, the pump head of the new LCC and LCD models is aligned at proper angles to the plunger axis, leading to a very compact format. In many pumps, the pump head is on the identical axis as the plunger, which frequently ends in bulky pump dimensions. The 90-degree orientation avoids this with the brand new fashions. This advantage is achieved by the extraordinarily compact and completely newly developed, cost-effective diaphragm drive.
In order to ensure the lengthy service life typical of Lewa pumps, solely high-quality, robust materials are used within the LCC and LCD versions. Toxic and abrasive substances can stress the pump significantly and so a big selection of materials can be utilized on the wet finish, that are additionally successfully used within the high-pressure variants of the Ecoflow collection. Many high-quality components from the Ecoflow sequence are additionally used for the drive items, employing the common parts technique. The result is robustness and sturdiness that is unusual in this pump class. In เพรสเชอร์เกจลม , all Ecosmart pumps have been designed with a single oil tub, which is used for both the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra advanced lubrication by way of two separate oil systems and leads to an easier design, which not solely facilitates operation but additionally reduces maintenance work.
Last however not least, the brand new LCC and LCD versions—like the LCA—comply with the us business commonplace for metering pumps API 675, guaranteeing practically unlimited usage for numerous demanding processes in a variety of industries.
USE IN THE CHEMICAL INDUSTRY
For example, when metering solvents within the chemical trade, pumps are needed that on the one hand meet the highest specification requirements and then again are nonetheless cost-effective. Here, the Ecosmart pump with its higher efficiency is able to meet exactly these requirements, because it has been precisely engineered for functions in the decrease pressure range as a lot as 50 bar (600 pounds). The larger versions of the Ecosmart pump are also suitable for industrial water treatment, such as in seawater desalination or industrial cooling circuits. What counts right here above all is compactness and cost-effective design, which the complete Lewa Ecosmart series fulfills because of its innovative design principle.
Before the new pump variants are available to customers, a selection of intensive tests might be carried out. They will be positive that the models also meet the high inner firm requirements for reliability and efficiency in operational practice. They embrace, on the one hand, steady load checks of as much as a quantity of tens of hundreds of hours and, however, overload tests. In the latter, the pump is run repeatedly at up to 20 percent above maximum strain to further validate its robustness. Special checks are carried out in heated cabinets to proof that the pumps additionally carry out perfectly beneath excessive ambient situations. After profitable completion of all exams and ultimate adjustments, the Ecosmart version LCC is now on the market, the LCD model will observe in mid-2022.
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