In many applications within the oil and gas trade, the chemical industry, and even the food trade, pumps that work reliably and provide high performance are needed. At the identical time, they should 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 as a lot as 300 l/h for many years. For use in applications with greater move charges, the pump skilled from Leonberg, Germany, is now expanding its product vary with two new sizes. In addition to the LCA version, the Ecosmart may even be out there in the more 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 flow rate of up to 528 gallons per hour. The most permissible operating strain for each fashions is 50 bar and 600 kilos respectively. The stringent use of similar elements throughout the Ecosmart product family retains manufacturing costs and due to this fact the ultimate price low. At the same time, a high stage of safety can be assured by specializing in all important design options such because the stress relief valve or the confirmed sandwich diaphragm with continuous monitoring. The LCC variant was made out there on the finish of 2021 and the LCD mannequin will be obtainable by mid-2022.
In addition to the proven diaphragm metering pumps of the Ecoflow sequence, Lewa has offered the inexpensive Ecosmart pump for several years. This is especially due to the fact that though a dependable pump unit is required in quite a few processes, at the same time comparatively low discharge pressures in the lower two-digit vary require less complicated pump expertise. With the Ecosmart LCA within the single pump version, nevertheless, solely a move rate of under eighty gallons per hour was beforehand potential. In order to have the ability to offer the Ecosmart for functions with higher move rates, the engineers at Lewa began developing two additional, bigger pump variants in 2019. The purpose was to scale up the Ecosmart to bigger purposes with the proven safety level and high quality Lewa elements without significantly growing the low funding value typical for this pump collection. This was to be achieved by a constant modular principle within the pump series, in addition to a strict focus on the essential features and features. The specifications additionally demanded the standard Lewa suitability for unrestricted steady operation over a few years. Options for integrating the pumps into automated systems through analog control indicators or bus systems are also a matter of course.
Lewa Ecosmart LCC3 on the take a look at stand.
First of all, the requirements for the conveying capability had to be carried out constructively. Larger plunger diameters had been selected for the smaller LCC variant, so that more than 264 gallons per hour can be conveyed instead of lower than 80 gallons. In the case of the extra highly effective LCD version, the engineers also determined to extend the stroke size so that a most move price of 528 gallons per hour could probably be achieved. Both pump varieties 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 performance of the pump was the operational reliability typical of Lewa familiar from other pump collection. For this objective, particular person, essential options such because the integrated strain safety valve or the sandwich diaphragm were taken over from the Ecoflow models. The individually adjustable pressure security valve ensures that sudden overpressure in the pump doesn’t damage the diaphragm or pump drive. The diaphragm safety system DPS, whose important part 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 broken throughout start-up. Thus, ตัววัดแรงดันน้ำ is protected in opposition to working errors or upset operating circumstances. Finally, the usual diaphragm monitoring system checks the situation of the diaphragm and warns plant operators instantly if there’s any harm. This reliably prevents cross-contamination between the pump and the piping system and ensures operational security always, especially in sensitive areas with toxic fluids. However, diaphragm monitoring is never used because Lewa diaphragms of this series normally achieve service lives of several years – even under full load and steady operation.
A key level was to keep production costs inside a similar range to the small LCA variant, thereby creating attractive market prices for applications with much less demanding necessities and lower working pressure. To achieve this, the design of the two new pump sizes wanted to combine elements which are as equivalent or a minimal of comparable as attainable to be able to keep away from high manufacturing prices. In this manner, the Lewa engineers have been able to successfully implement the frequent components technique that had already been practiced many times.
Pump users additionally profit from this clever modular principle, as many wear elements can be utilized throughout pump types. This considerably simplifies the spare elements stock. At the identical time, the modular precept additionally permits individual adjustments to the respective utility. For instance, stroke frequencies or plunger diameters may be selected individually. The basis for that 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 additionally offers benefits for plant development: It permits the Ecosmart pump to be oriented either vertically or horizontally, making it simpler to combine the unit into methods with restricted or confined areas. 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 same axis because the plunger, which often ends in bulky pump dimensions. The 90-degree orientation avoids this with the model new fashions. This benefit is achieved by the extraordinarily compact and utterly newly developed, cost-effective diaphragm drive.
In order to ensure the lengthy 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 a big selection of materials can be used on the moist finish, which are also efficiently used within the high-pressure variants of the Ecoflow collection. Many high-quality elements from the Ecoflow sequence are also used for the drive models, using the widespread elements strategy. The result is robustness and sturdiness that is uncommon in this pump class. In addition, all Ecosmart pumps have been designed with a single oil tub, which is used for both the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra advanced lubrication through two separate oil techniques and leads to an easier design, which not solely facilitates operation but also reduces maintenance work.
Last but not least, the new LCC and LCD versions—like the LCA—comply with the U.S. industry commonplace for metering pumps API 675, making certain practically limitless utilization for quite a few demanding processes in a wide range of industries.
For instance, when metering solvents in the chemical trade, pumps are needed that on the one hand meet the very best specification requirements and then again are nonetheless cost-effective. Here, the Ecosmart pump with its greater efficiency is ready to meet exactly these requirements, as it has been precisely engineered for purposes in the decrease strain range as much as 50 bar (600 pounds). The larger versions of the Ecosmart pump are additionally suitable for industrial water remedy, corresponding to in seawater desalination or industrial cooling circuits. What counts here above all is compactness and cost-effective design, which the entire Lewa Ecosmart collection fulfills thanks to its revolutionary design principle.
Before the new pump variants are available to customers, numerous extensive tests might be carried out. They will be positive that the units also meet the high inside company necessities for reliability and performance in operational apply. They embody, on the one hand, continuous load tests of as much as several tens of 1000’s of hours and, on the other hand, overload checks. In the latter, the pump is run repeatedly at as a lot as 20 % above most stress to additional validate its robustness. Special tests are carried out in heated cupboards to proof that the pumps additionally carry out perfectly underneath excessive ambient situations. After profitable completion of all exams and ultimate changes, the Ecosmart model LCC is now on the market, the LCD model will comply with in mid-2022.