In many applications in the oil and fuel trade, the chemical business, and even the food trade, pumps that work reliably and supply excessive performance are wanted. At the identical time, they must have convincingly low investment costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has supplied a cost-attractive and safe mannequin that can handle move rates of as a lot as 300 l/h for many years. For use in applications with greater 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 also be out there within the extra powerful LCC and LCD versions in the future. While the LCC mannequin can meter in extra of 264 gallons per hour, Lewa designed the LCD for a circulate price of as much as 528 gallons per hour. The maximum permissible operating pressure for both fashions is 50 bar and 600 kilos respectively. The stringent use of comparable parts within the Ecosmart product family retains manufacturing costs and due to this fact the ultimate worth low. At the identical time, a high stage of security may be assured by focusing on all essential design options such as the strain relief valve or the proven sandwich diaphragm with continuous monitoring. The LCC variant was made out there 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 offered the cheaper Ecosmart pump for several years. This is principally due to the fact that though a dependable pump unit is required in numerous processes, at the similar time relatively low discharge pressures in the lower two-digit vary require less complex pump technology. With the Ecosmart LCA in the single pump version, however, only a circulate price of beneath eighty gallons per hour was beforehand potential. In order to be able to supply the Ecosmart for functions with higher circulate rates, the engineers at Lewa started creating two extra, bigger pump variants in 2019. ไดอะแฟรม ซีล was to scale up the Ecosmart to larger applications with the proven safety stage and high quality Lewa components without significantly increasing the low investment price typical for this pump sequence. This was to be achieved by a consistent modular precept throughout the pump sequence, as well as a strict concentrate on the essential features and features. The specs also demanded the usual Lewa suitability for unrestricted steady operation over many years. Options for integrating the pumps into automated techniques by way of analog control indicators or bus techniques are also a matter in fact.
Lewa Ecosmart LCC3 on the take a look at stand.
ADJUSTMENT OF PLUNGER DIAMETER AND STROKE ENABLE MORE FLOW
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 more than 264 gallons per hour can be conveyed as a substitute of lower than 80 gallons. In the case of the extra powerful LCD version, the engineers additionally decided to increase the stroke length so that a maximum flow rate of 528 gallons per hour might be achieved. Both pump sorts can work in opposition to a most working stress of 50 bar. As with all hydraulically actuated diaphragm metering pumps, maximum pressures are achieved with smaller plunger diameters.
Just as necessary as the performance of the pump was the operational reliability typical of Lewa acquainted from other pump series. For this purpose, individual, essential features such as the integrated pressure security valve or the sandwich diaphragm had been taken over from the Ecoflow models. The individually adjustable pressure security 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 always works in the proper place. It can’t be overstretched or damaged throughout start-up. Thus, the pump is protected against operating errors or upset working conditions. Finally, the standard diaphragm monitoring system checks the situation of the diaphragm and warns plant operators immediately if there is 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 toxic fluids. However, diaphragm monitoring is never used as a result of Lewa diaphragms of this series usually obtain service lives of a quantity of years – even beneath full load and continuous operation.
A key level was to maintain production prices inside a similar vary to the small LCA variant, thereby creating attractive market prices for applications with much less demanding requirements and decrease working stress. To achieve this, the design of the two new pump sizes wanted to combine elements which may be as identical or at least related as possible so as to keep away from excessive manufacturing costs. In this fashion, the Lewa engineers have been capable of efficiently implement the widespread elements strategy that had already been practiced many times.
Pump customers additionally benefit from this clever modular precept, as many wear parts can be utilized across pump varieties. This considerably simplifies the spare components inventory. At the identical time, the modular principle additionally permits individual changes to the respective software. For instance, 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 within the Ecoflow program.
Lewa Ecosmart LCC in heated cupboard.
GOOD INTEGRABILITY FOR PLANT CONSTRUCTION COMPANIES
The pump’s flexibility also presents advantages for plant construction: It permits the Ecosmart pump to be oriented both vertically or horizontally, making it simpler to integrate the unit into techniques 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, resulting in a particularly compact format. In many pumps, the pump head is on the same axis as the plunger, which often results in cumbersome pump dimensions. The 90-degree orientation avoids this with the new fashions. This benefit is achieved by the extraordinarily compact and utterly newly developed, cost-effective diaphragm drive.
In order to ensure the long service life typical of Lewa pumps, only high-quality, sturdy materials are used in the LCC and LCD versions. Toxic and abrasive substances can stress the pump considerably and so quite lots of materials can be used on the wet finish, that are additionally successfully used in the high-pressure variants of the Ecoflow sequence. Many high-quality elements from the Ecoflow collection are also used for the drive items, using the frequent parts 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 bathtub, which is used for each the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra complicated lubrication by way of two separate oil systems and results in a less complicated design, which not only facilitates operation but in addition reduces maintenance work.
Last but not least, the brand new LCC and LCD versions—like the LCA—comply with the united states industry commonplace for metering pumps API 675, ensuring nearly unlimited usage for numerous demanding processes in a variety of industries.
USE IN THE CHEMICAL INDUSTRY
For example, when metering solvents in the chemical trade, pumps are wanted that on the one hand meet the best specification requirements and however are nonetheless cost-effective. Here, the Ecosmart pump with its larger efficiency is prepared to meet precisely these requirements, as it has been precisely engineered for purposes in the lower pressure vary up to 50 bar (600 pounds). The larger 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 complete Lewa Ecosmart sequence fulfills due to its progressive design principle.
Before the new pump variants can be found to customers, a number of in depth tests will be carried out. They will be certain that the units also meet the excessive inner company necessities for reliability and performance in operational follow. They embody, on the one hand, steady load exams of up to a number of tens of hundreds of hours and, however, overload checks. In the latter, the pump is run constantly at as a lot as 20 percent above maximum pressure to additional validate its robustness. Special checks are carried out in heated cabinets to proof that the pumps also carry out completely underneath excessive ambient circumstances. After successful completion of all checks and ultimate changes, the Ecosmart model LCC is now available on the market, the LCD mannequin will comply with in mid-2022.
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