Affordable Even at Higher Flow Rates

In many purposes within the oil and fuel business, the chemical trade, and even the food industry, pumps that work reliably and provide high performance are needed. At the identical time, they must have convincingly low funding costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has supplied a cost-attractive and safe model that can handle flow rates of up to 300 l/h for a couple of years. For use in purposes with higher circulate charges, the pump skilled from Leonberg, Germany, is now expanding its product range with two new sizes. In addition to the LCA model, the Ecosmart may even be obtainable within the extra highly effective LCC and LCD variations sooner or later. While the LCC mannequin can meter in extra of 264 gallons per hour, Lewa designed the LCD for a flow rate of as much as 528 gallons per hour. The most permissible working pressure for both models is 50 bar and 600 pounds respectively. The stringent use of similar parts throughout the Ecosmart product household keeps manufacturing costs and subsequently the ultimate price low. At the same time, a high level of safety can be assured by specializing in all important design features such as the stress reduction valve or the confirmed sandwich diaphragm with steady monitoring. The LCC variant was made obtainable at the end of 2021 and the LCD model might be obtainable by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow series, Lewa has supplied the cheaper Ecosmart pump for a number of years. This is principally as a outcome of the fact that although a dependable pump unit is required in numerous processes, on the similar time comparatively low discharge pressures in the decrease two-digit vary require less complicated pump expertise. With the Ecosmart LCA within the single pump model, nonetheless, solely a circulate price of below 80 gallons per hour was previously possible. In order to find a way to supply the Ecosmart for functions with greater circulate rates, the engineers at Lewa began growing two additional, larger pump variants in 2019. The purpose was to scale up the Ecosmart to larger functions with the confirmed safety level and top quality Lewa elements with out considerably increasing the low investment price typical for this pump series. This was to be achieved by a constant modular principle inside the pump collection, in addition to a strict focus on the important functions and features. The specifications additionally demanded the usual Lewa suitability for unrestricted continuous operation over many years. Options for integrating the pumps into automated techniques through analog control alerts or bus systems are additionally a matter of course.
Lewa Ecosmart LCC3 on the test stand.
First of all, the requirements for the conveying capacity needed to be implemented constructively. Larger plunger diameters were chosen for the smaller LCC variant, in order that greater than 264 gallons per hour could be conveyed instead of less than eighty gallons. In the case of the extra powerful LCD version, the engineers additionally determined to extend the stroke size so that a most circulate rate of 528 gallons per hour might be achieved. Both pump varieties can work in opposition to a maximum working stress of 50 bar. As with เกจวัดแรงดันเครื่องกรองน้ำ actuated diaphragm metering pumps, maximum pressures are achieved with smaller plunger diameters.
Just as essential because the performance of the pump was the operational reliability typical of Lewa familiar from other pump series. For this objective, particular person, important features such because the built-in pressure safety valve or the sandwich diaphragm were taken over from the Ecoflow fashions. The individually adjustable stress safety valve ensures that sudden overpressure within the pump doesn’t damage the diaphragm or pump drive. The diaphragm protection system DPS, whose important part is a return spring for the diaphragm, additionally ensures that the PTFE sandwich diaphragm all the time works in the proper place. It cannot be overstretched or damaged during start-up. Thus, the pump is protected against working errors or upset operating situations. Finally, the usual diaphragm monitoring system checks the situation of the diaphragm and warns plant operators instantly if there is any harm. This reliably prevents cross-contamination between the pump and the piping system and ensures operational safety always, particularly in sensitive areas with poisonous fluids. However, diaphragm monitoring isn’t used as a end result of Lewa diaphragms of this collection usually obtain service lives of several years – even under full load and continuous operation.
A key point was to maintain production costs within an analogous range to the small LCA variant, thereby creating enticing market costs for applications with less demanding requirements and lower operating stress. To accomplish that, the design of the two new pump sizes wanted to combine components which would possibly be as equivalent or a minimum of related as possible to find a way to avoid high manufacturing costs. In this fashion, the Lewa engineers have been in a position to successfully implement the frequent components strategy that had already been practiced many instances.
Pump customers also profit from this intelligent modular principle, as many wear parts can be used across pump varieties. This considerably simplifies the spare parts stock. At the same time, the modular principle also allows particular person adjustments to the respective utility. For instance, 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 cabinet.
The pump’s flexibility also offers advantages for plant building: It permits the Ecosmart pump to be oriented either vertically or horizontally, making it easier to combine the unit into techniques with limited or confined spaces. In addition, the pump head of the model new LCC and LCD fashions 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 as the plunger, which often results in bulky pump dimensions. The 90-degree orientation avoids this with the new models. This advantage is achieved by the extremely compact and fully newly developed, cost-effective diaphragm drive.
In order to ensure the lengthy service life typical of Lewa pumps, solely high-quality, strong supplies are used within the LCC and LCD versions. Toxic and abrasive substances can stress the pump significantly and so quite a lot of supplies can be utilized on the moist end, that are also successfully used in the high-pressure variants of the Ecoflow series. Many high-quality elements from the Ecoflow series are also used for the drive items, using the widespread elements technique. The result’s robustness and durability that’s unusual in this pump class. In addition, all Ecosmart pumps have been designed with a single oil bathtub, which is used for both the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra complex lubrication by way of two separate oil techniques and results in an easier design, which not only facilitates operation but also reduces upkeep work.
Last but not least, the model new LCC and LCD versions—like the LCA—comply with the us industry standard for metering pumps API 675, guaranteeing almost unlimited utilization for numerous demanding processes in a variety of industries.
For instance, when metering solvents in the chemical trade, pumps are wanted that on the one hand meet the highest specification requirements and then again are still cost-effective. Here, the Ecosmart pump with its larger efficiency is in a position to meet precisely these necessities, as it has been precisely engineered for purposes in the decrease stress range as much as 50 bar (600 pounds). The larger variations of the Ecosmart pump are also suitable for industrial water therapy, similar to in seawater desalination or industrial cooling circuits. What counts here above all is compactness and cost-effective design, which the complete Lewa Ecosmart collection fulfills thanks to its progressive design principle.
Before the model new pump variants are available to customers, a number of extensive tests might be carried out. They will be certain that the models also meet the high inner firm requirements for reliability and efficiency in operational practice. They embrace, on the one hand, continuous load tests of up to several tens of thousands of hours and, on the opposite hand, overload tests. In the latter, the pump is run repeatedly at up to 20 % above most stress to further validate its robustness. Special checks are carried out in heated cupboards to proof that the pumps also carry out perfectly underneath excessive ambient situations. After successful completion of all tests and last adjustments, the Ecosmart model LCC is now on the market, the LCD model will observe in mid-2022.

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