Affordable Even at Higher Flow Rates

In many applications in the oil and gasoline industry, the chemical industry, or even the meals business, pumps that work reliably and provide excessive performance are wanted. At the same time, they should have convincingly low investment prices. 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 many years. For use in applications with larger circulate charges, the pump skilled from Leonberg, Germany, is now increasing its product range with two new sizes. In addition to the LCA version, the Ecosmart will also be available in the extra highly effective 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 price of up to 528 gallons per hour. The maximum permissible working stress for both fashions is 50 bar and 600 kilos respectively. The stringent use of comparable parts inside the Ecosmart product household keeps manufacturing costs and due to this fact the final value low. At the same time, a high level of security can be guaranteed by specializing in all important design options such because the strain reduction valve or the proven sandwich diaphragm with steady monitoring. The LCC variant was made out there at the finish of 2021 and the LCD mannequin will be out there by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow collection, Lewa has offered the inexpensive Ecosmart pump for a number of years. This is mainly because of the reality that although a reliable pump unit is required in numerous processes, at the same time relatively low discharge pressures within the lower two-digit vary require much less advanced pump expertise. With the Ecosmart LCA within the single pump version, however, only a move rate of below 80 gallons per hour was previously potential. In order to be able to offer the Ecosmart for functions with higher circulate charges, the engineers at Lewa started developing two further, bigger pump variants in 2019. The purpose was to scale up the Ecosmart to larger purposes with the confirmed security stage and top quality Lewa elements with out considerably increasing the low funding cost typical for this pump series. This was to be achieved by a constant modular principle inside the pump sequence, in addition to a strict concentrate on the essential features and features. The specs additionally demanded the similar old Lewa suitability for unrestricted steady operation over many years. Options for integrating the pumps into automated systems through analog control indicators or bus methods are additionally a matter in fact.
Lewa Ecosmart LCC3 on the test stand.
First of all, the necessities for the conveying capability needed to be applied constructively. Larger plunger diameters were selected for the smaller LCC variant, in order that more than 264 gallons per hour can be conveyed as a substitute of lower than eighty gallons. In the case of the more powerful LCD version, the engineers additionally determined to extend the stroke length so that a maximum circulate fee of 528 gallons per hour could probably be achieved. Both pump varieties can work in opposition to a maximum working stress of fifty bar. As with all hydraulically actuated diaphragm metering pumps, most pressures are achieved with smaller plunger diameters.
Just as necessary because the efficiency of the pump was the operational reliability typical of Lewa acquainted from different pump collection. For this purpose, particular person, important options such because the built-in pressure safety valve or the sandwich diaphragm have been taken over from the Ecoflow models. The individually adjustable strain security valve ensures that sudden overpressure in the pump does not injury the diaphragm or pump drive. The diaphragm protection system DPS, whose essential element is a return spring for the diaphragm, also ensures that the PTFE sandwich diaphragm at all times works in the right place. It can’t be overstretched or damaged during start-up. Thus, the pump is protected against working errors or upset operating conditions. Finally, เกจวัดแรงดันน้ำมันเบนซิน monitoring system checks the condition of the diaphragm and warns plant operators instantly if there may be any injury. This reliably prevents cross-contamination between the pump and the piping system and ensures operational security always, particularly in delicate areas with poisonous fluids. However, diaphragm monitoring is never used because Lewa diaphragms of this series normally obtain service lives of a number of years – even beneath full load and steady operation.
A key level was to keep production prices within an identical vary to the small LCA variant, thereby creating attractive market costs for applications with much less demanding requirements and lower operating stress. To accomplish that, the design of the 2 new pump sizes needed to integrate components which would possibly be as identical or at least similar as possible in order to avoid high manufacturing costs. In this fashion, the Lewa engineers were able to efficiently implement the common parts strategy that had already been practiced many instances.
Pump users also profit from this intelligent modular principle, as many wear parts can be utilized throughout pump varieties. This considerably simplifies the spare elements inventory. At the same time, the modular principle also permits individual changes to the respective application. For example, stroke frequencies or plunger diameters could be chosen 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.
The pump’s flexibility additionally 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 methods with limited or confined spaces. In addition, the pump head of the brand 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 because the plunger, which regularly ends in bulky pump dimensions. The 90-degree orientation avoids this with the new models. This benefit is achieved by the extremely compact and completely newly developed, cost-effective diaphragm drive.
In order to make sure the long service life typical of Lewa pumps, only high-quality, robust supplies are used within the LCC and LCD variations. Toxic and abrasive substances can stress the pump significantly and so quite a lot of supplies can be utilized on the moist finish, that are also efficiently used within the high-pressure variants of the Ecoflow series. Many high-quality parts from the Ecoflow series are also used for the drive units, using the common parts strategy. The result’s 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 advanced lubrication through two separate oil methods and leads to a simpler design, which not solely facilitates operation but also reduces upkeep work.
Last however not least, the brand new LCC and LCD versions—like the LCA—comply with the U.S. industry commonplace for metering pumps API 675, guaranteeing almost unlimited usage for numerous demanding processes in a broad range of industries.
For instance, when metering solvents within the chemical trade, pumps are needed 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 able to meet precisely these requirements, because it has been precisely engineered for purposes in the decrease stress range up to 50 bar (600 pounds). The larger versions of the Ecosmart pump are also appropriate for industrial water treatment, corresponding to in seawater desalination or industrial cooling circuits. What counts right here above all is compactness and cost-effective design, which the whole Lewa Ecosmart collection fulfills due to its revolutionary design precept.
Before the model new pump variants are available to customers, a number of extensive exams will be carried out. They will ensure that the models also meet the excessive inside company necessities for reliability and efficiency in operational practice. They embrace, on the one hand, steady load checks of up to several tens of thousands of hours and, however, overload tests. In the latter, the pump is run continuously at up to 20 % above most strain to additional validate its robustness. Special tests are carried out in heated cabinets to proof that the pumps also perform completely under excessive ambient conditions. After profitable completion of all checks and ultimate adjustments, the Ecosmart model LCC is now available on the market, the LCD model will follow in mid-2022.

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