In many purposes within the oil and gas industry, the chemical industry, and even the meals trade, pumps that work reliably and provide high performance are wanted. At the same time, they should have convincingly low funding costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has offered a cost-attractive and secure mannequin that can deal with circulate charges of as much as 300 l/h for a couple of years. For use in applications with greater move charges, the pump professional from Leonberg, Germany, is now increasing its product range with two new sizes. In addition to the LCA model, the Ecosmart may even be obtainable in 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 move price of as much as 528 gallons per hour. The maximum permissible operating strain for each models is 50 bar and 600 pounds respectively. The stringent use of similar parts within the Ecosmart product family keeps production prices and therefore the final value low. At the identical time, a high stage of security may be guaranteed by specializing in all essential design options such as the strain relief valve or the confirmed sandwich diaphragm with continuous monitoring. The LCC variant was made obtainable on the finish of 2021 and the LCD model will be out there by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow series, Lewa has offered the inexpensive Ecosmart pump for several years. This is principally as a result of the reality that though a dependable pump unit is required in numerous processes, on the identical time relatively low discharge pressures in the lower two-digit vary require less complicated pump expertise. With the Ecosmart LCA in the single pump version, nevertheless, only a flow rate of below 80 gallons per hour was previously potential. In order to have the ability to supply the Ecosmart for functions with larger circulate rates, the engineers at Lewa began creating two further, bigger pump variants in 2019. The purpose was to scale up the Ecosmart to bigger applications with the proven safety degree and prime quality Lewa components without significantly increasing the low funding price typical for this pump series. This was to be achieved by a consistent modular precept inside the pump collection, in addition to a strict focus on the essential functions and options. The specs also demanded the usual Lewa suitability for unrestricted steady operation over many years. Options for integrating the pumps into automated systems by way of analog control indicators or bus methods are additionally a matter of course.
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 capability had to be applied constructively. Larger plunger diameters were selected for the smaller LCC variant, so that greater than 264 gallons per hour can be conveyed as an alternative of lower than eighty gallons. In the case of the more powerful LCD model, the engineers also decided to increase the stroke length so that a most circulate price of 528 gallons per hour could possibly be achieved. Both pump varieties can work in opposition to a most working 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 performance of the pump was the operational reliability typical of Lewa acquainted from other pump sequence. For this objective, individual, essential options such as the built-in pressure safety 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 important element 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 throughout start-up. Thus, the pump is protected against operating errors or upset working situations. Finally, the usual diaphragm monitoring system checks the condition of the diaphragm and warns plant operators immediately if there might be any harm. This reliably prevents cross-contamination between the pump and the piping system and ensures operational security always, especially in delicate areas with poisonous fluids. However, diaphragm monitoring is rarely used because Lewa diaphragms of this series normally achieve service lives of a number of years – even under full load and steady operation.
A key point was to maintain production prices within an identical range to the small LCA variant, thereby creating enticing market costs for applications with much less demanding necessities and decrease operating pressure. To accomplish that, the design of the 2 new pump sizes needed to combine components that are as identical or at least similar as attainable in order to avoid high manufacturing costs. In this manner, the Lewa engineers had been able to successfully implement the frequent parts strategy that had already been practiced many instances.
Pump customers additionally benefit from this intelligent modular principle, as many put on parts can be utilized throughout pump types. This significantly simplifies the spare elements inventory. At the identical time, the modular principle also permits particular person changes to the respective utility. For instance, stroke frequencies or plunger diameters could be chosen individually. The basis for this 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 additionally provides benefits for plant construction: It allows the Ecosmart pump to be oriented either vertically or horizontally, making it simpler to combine the unit into systems with limited or confined areas. In addition, the pump head of the brand new LCC and LCD models is aligned at proper angles to the plunger axis, resulting in a very compact format. In many pumps, the pump head is on the same axis because the plunger, which frequently ends in bulky pump dimensions. The 90-degree orientation avoids this with the new models. This benefit is achieved by the extremely compact and fully newly developed, cost-effective diaphragm drive.
In order to ensure the long service life typical of Lewa pumps, solely high-quality, strong materials are used in the LCC and LCD variations. Toxic and abrasive substances can stress the pump considerably and so a wide range of materials can be utilized on the moist finish, that are additionally 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, employing the common parts technique. The result is robustness and durability that’s 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 complicated lubrication by way of two separate oil methods and ends in an easier design, which not only facilitates operation but additionally reduces maintenance work.
Last however not least, the model new LCC and LCD versions—like the LCA—comply with the us industry standard for metering pumps API 675, making certain almost limitless utilization for quite a few demanding processes in a variety of industries.
USE IN THE CHEMICAL INDUSTRY
For instance, when metering solvents in 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 efficiency is ready to meet exactly these necessities, as it has been precisely engineered for purposes in the lower stress range up to 50 bar (600 pounds). The bigger versions of the Ecosmart pump are additionally 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 whole Lewa Ecosmart sequence fulfills due to its progressive design principle.
Before the new pump variants are available to customers, numerous extensive tests will be carried out. เครื่องมือที่ใช้วัดความดัน will make sure that the items also meet the excessive inside company requirements for reliability and performance in operational practice. They include, on the one hand, steady load exams of as a lot as a quantity of tens of 1000’s of hours and, on the opposite hand, overload checks. In the latter, the pump is run constantly at up to 20 percent above most stress to additional validate its robustness. Special checks are carried out in heated cupboards to proof that the pumps also perform completely underneath extreme ambient conditions. After profitable completion of all tests and ultimate adjustments, the Ecosmart version LCC is now available on the market, the LCD mannequin will observe in mid-2022.
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