Affordable Even at Higher Flow Rates

In many applications in the oil and fuel business, the chemical trade, or even the meals industry, pumps that work reliably and provide high efficiency are needed. At the same time, they should have convincingly low investment prices. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has provided a cost-attractive and safe mannequin that may handle flow charges of as a lot as 300 l/h for many years. For use in purposes with higher flow rates, the pump skilled from Leonberg, Germany, is now expanding its product range with two new sizes. In addition to the LCA version, the Ecosmart may even be obtainable in the extra powerful LCC and LCD versions sooner or later. While the LCC model can meter in extra of 264 gallons per hour, Lewa designed the LCD for a circulate fee of up to 528 gallons per hour. The most permissible working pressure for both models is 50 bar and 600 pounds respectively. The stringent use of similar components inside the Ecosmart product household retains production prices and due to this fact the ultimate price low. At the identical time, a excessive degree of safety can be guaranteed by focusing on all important design features such because the stress aid valve or the confirmed sandwich diaphragm with continuous monitoring. The LCC variant was made obtainable on the end of 2021 and the LCD model might be out there by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow series, Lewa has supplied the inexpensive Ecosmart pump for a number of years. This is mainly because of the reality that though a dependable pump unit is required in numerous processes, on the identical time relatively low discharge pressures in the decrease two-digit range require less complex pump technology. With the Ecosmart LCA within the single pump model, nevertheless, solely a flow rate of beneath eighty gallons per hour was previously possible. In order to find a way to provide the Ecosmart for applications with larger circulate rates, the engineers at Lewa started developing two additional, bigger pump variants in 2019. The goal was to scale up the Ecosmart to bigger purposes with the confirmed security level and prime quality Lewa elements without considerably growing the low funding cost typical for this pump series. This was to be achieved by a consistent modular precept within the pump sequence, in addition to a strict focus on the important features and options. The specifications also demanded the usual Lewa suitability for unrestricted steady operation over many years. Options for integrating the pumps into automated methods via analog control alerts or bus techniques are additionally a matter of course.
Lewa Ecosmart LCC3 on the test stand.
First of all, the necessities for the conveying capacity had to be implemented constructively. Larger plunger diameters have been chosen for the smaller LCC variant, in order that greater than 264 gallons per hour can be conveyed as a substitute of lower than 80 gallons. In the case of the more powerful LCD model, the engineers also decided to extend the stroke size so that a maximum circulate price of 528 gallons per hour could presumably be achieved. Both pump sorts can work against a most operating pressure of fifty bar. As with all hydraulically actuated diaphragm metering pumps, most pressures are achieved with smaller plunger diameters.
Just as necessary as the efficiency of the pump was the operational reliability typical of Lewa familiar from different pump series. For this objective, individual, essential features such as the integrated strain safety valve or the sandwich diaphragm have been taken over from the Ecoflow models. The individually adjustable strain safety valve ensures that sudden overpressure within the pump does not damage the diaphragm or pump drive. The diaphragm safety system DPS, whose important element is a return spring for the diaphragm, additionally ensures that the PTFE sandwich diaphragm all the time works in the best place. It cannot be overstretched or broken during start-up. Thus, the pump is protected in opposition to operating errors or upset working conditions. Finally, the usual diaphragm monitoring system checks the condition of the diaphragm and warns plant operators instantly if there could be 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 is never used as a end result of Lewa diaphragms of this sequence normally obtain service lives of several years – even under full load and steady operation.
A key level was to keep manufacturing prices within an analogous range to the small LCA variant, thereby creating enticing market costs for purposes with much less demanding requirements and decrease operating stress. To achieve this, the design of the two new pump sizes wanted to combine parts that are as identical or at least comparable as attainable in order to keep away from excessive manufacturing prices. In pressure gauge digital ราคา , the Lewa engineers have been able to efficiently implement the widespread parts strategy that had already been practiced many times.
Pump customers additionally benefit from this clever modular precept, as many wear elements can be used across pump types. This considerably simplifies the spare elements inventory. At the identical time, the modular precept additionally permits particular person changes to the respective utility. For example, stroke frequencies or plunger diameters may be selected individually. The foundation for this is the M900 pump head, which is already used within the LCA variant and in the Ecoflow program.
Lewa Ecosmart LCC in heated cabinet.
The pump’s flexibility also provides advantages for plant construction: It allows the Ecosmart pump to be oriented both vertically or horizontally, making it simpler to integrate the unit into techniques with restricted or confined spaces. In addition, the pump head of the new LCC and LCD models is aligned at right angles to the plunger axis, leading to a particularly 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 new fashions. This benefit 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, strong supplies 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 moist finish, that are also efficiently used in the high-pressure variants of the Ecoflow sequence. Many high-quality parts from the Ecoflow collection are additionally used for the drive items, using the widespread elements strategy. The result’s robustness and durability that is uncommon in this pump class. In addition, all Ecosmart pumps have been designed with a single oil bath, which is used for both the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the more complex lubrication via two separate oil methods and ends in a simpler design, which not solely facilitates operation but additionally reduces upkeep work.
Last but not least, the new LCC and LCD versions—like the LCA—comply with the U.S. trade normal for metering pumps API 675, ensuring nearly unlimited usage for quite a few demanding processes in a variety of industries.
For example, when metering solvents within the chemical industry, pumps are needed that on the one hand meet the highest specification requirements and then again are still cost-effective. Here, the Ecosmart pump with its higher performance is in a position to meet precisely these requirements, because it has been exactly engineered for functions within the decrease pressure range up to 50 bar (600 pounds). The bigger versions of the Ecosmart pump are additionally suitable for industrial water treatment, such as in seawater desalination or industrial cooling circuits. What counts here above all is compactness and cost-effective design, which the entire Lewa Ecosmart series fulfills due to its innovative design principle.
Before the brand new pump variants can be found to prospects, a quantity of in depth checks might be carried out. They will make positive that the models additionally meet the high inner firm necessities for reliability and performance in operational follow. They embody, on the one hand, steady load tests of as much as a number of tens of 1000’s of hours and, on the other hand, overload checks. In the latter, the pump is run continuously at as a lot as 20 p.c above maximum stress to additional validate its robustness. Special tests are carried out in heated cabinets to proof that the pumps also perform perfectly beneath excessive ambient conditions. After successful completion of all tests and ultimate adjustments, the Ecosmart model LCC is now available on the market, the LCD mannequin will comply with in mid-2022.

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