In many applications in the oil and fuel business, the chemical business, and even the food business, pumps that work reliably and provide 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 protected model that can handle move rates of as a lot as 300 l/h for a number of years. For use in applications with higher move rates, the pump skilled from Leonberg, Germany, is now expanding its product vary with two new sizes. In addition to the LCA model, the Ecosmart may also be obtainable within the more powerful LCC and LCD versions sooner or later. While the LCC mannequin 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 maximum permissible operating pressure for both models is 50 bar and 600 kilos respectively. The stringent use of comparable elements within the Ecosmart product household keeps manufacturing costs and therefore the ultimate worth low. At the identical time, a excessive degree of security can be guaranteed by specializing in all important design options such because the pressure reduction valve or the proven sandwich diaphragm with continuous monitoring. The LCC variant was made available on the end of 2021 and the LCD mannequin shall be available by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow collection, Lewa has offered the less expensive 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 similar time relatively low discharge pressures in the lower two-digit range require much less complex pump technology. With the Ecosmart LCA in the single pump version, nevertheless, solely a circulate fee of under 80 gallons per hour was beforehand possible. In order to have the ability to offer the Ecosmart for purposes with higher circulate charges, the engineers at Lewa started creating two extra, larger pump variants in 2019. The aim was to scale up the Ecosmart to larger applications with the proven safety degree and prime quality Lewa components with out considerably rising the low investment value typical for this pump sequence. This was to be achieved by a consistent modular principle inside the pump collection, in addition to a strict give attention to the important capabilities and options. The specifications additionally demanded the same old Lewa suitability for unrestricted continuous operation over many years. Options for integrating the pumps into automated techniques through analog management signals or bus systems are additionally a matter after all.
Lewa Ecosmart LCC3 on the test 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 had been chosen for the smaller LCC variant, in order that more than 264 gallons per hour could be conveyed as a substitute of less than 80 gallons. In the case of the extra highly effective LCD model, the engineers additionally decided to increase the stroke size so that a most move price of 528 gallons per hour might be achieved. Both pump varieties can work towards a most working strain 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 sequence. For this function, individual, essential features such because the integrated stress security valve or the sandwich diaphragm had been taken over from the Ecoflow fashions. The individually adjustable stress security valve ensures that sudden overpressure within the pump doesn’t injury the diaphragm or pump drive. เกจวัดแรงดันน้ําไทวัสดุ , whose essential part is a return spring for the diaphragm, also ensures that the PTFE sandwich diaphragm at all times works in the right place. It cannot be overstretched or broken throughout start-up. Thus, the pump is protected against working errors or upset operating situations. Finally, the usual diaphragm monitoring system checks the situation of the diaphragm and warns plant operators instantly if there is any harm. This reliably prevents cross-contamination between the pump and the piping system and ensures operational safety always, especially in sensitive areas with poisonous fluids. However, diaphragm monitoring is rarely used as a end 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 keep manufacturing prices inside an analogous vary to the small LCA variant, thereby creating attractive market prices for functions with much less demanding requirements and decrease working strain. To achieve this, the design of the two new pump sizes needed to combine elements which are as equivalent or no less than related as attainable in order to avoid high manufacturing prices. In this way, the Lewa engineers had been in a place to efficiently implement the widespread components technique that had already been practiced many instances.
Pump customers additionally profit from this clever modular principle, as many put on parts can be used across pump varieties. This significantly simplifies the spare components inventory. At the identical time, the modular principle additionally allows particular person changes to the respective application. For instance, stroke frequencies or plunger diameters may be chosen 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 cupboard.
GOOD INTEGRABILITY FOR PLANT CONSTRUCTION COMPANIES
The pump’s flexibility also offers benefits for plant building: It permits the Ecosmart pump to be oriented both vertically or horizontally, making it easier to integrate the unit into techniques with restricted or confined spaces. In addition, the pump head of the model new LCC and LCD models is aligned at proper angles to the plunger axis, leading to a particularly compact format. In many pumps, the pump head is on the same axis because the plunger, which frequently leads to cumbersome pump dimensions. The 90-degree orientation avoids this with the brand new fashions. This benefit is achieved by the extraordinarily compact and utterly newly developed, cost-effective diaphragm drive.
In order to make sure the long service life typical of Lewa pumps, only high-quality, strong supplies are used within the LCC and LCD versions. Toxic and abrasive substances can stress the pump significantly and so a selection of materials can be used on the moist end, that are additionally efficiently used within the high-pressure variants of the Ecoflow series. Many high-quality components from the Ecoflow sequence are additionally used for the drive models, employing the common elements strategy. The result’s robustness and durability that’s unusual on 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 advanced lubrication through two separate oil systems and results in a less complicated 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. trade standard for metering pumps API 675, ensuring nearly unlimited utilization for quite a few demanding processes in a extensive range of industries.
USE IN THE CHEMICAL INDUSTRY
For instance, when metering solvents within the chemical trade, pumps are needed that on the one hand meet the very best specification requirements and on the other hand are still cost-effective. Here, the Ecosmart pump with its greater efficiency is prepared to meet precisely these necessities, as it has been exactly engineered for functions in the decrease pressure vary as much as 50 bar (600 pounds). The bigger variations of the Ecosmart pump are also appropriate for industrial water therapy, such as in seawater desalination or industrial cooling circuits. What counts here above all is compactness and cost-effective design, which the whole Lewa Ecosmart collection fulfills due to its revolutionary design precept.
Before the brand new pump variants can be found to customers, numerous extensive exams will be carried out. They will be positive that the items additionally meet the high inner firm necessities for reliability and efficiency in operational practice. They include, on the one hand, steady load checks of up to several tens of 1000’s of hours and, however, overload exams. In the latter, the pump is run continuously at as a lot as 20 % above maximum pressure to further validate its robustness. Special tests are carried out in heated cabinets to proof that the pumps also carry out completely under extreme ambient conditions. After profitable completion of all tests and last changes, the Ecosmart model LCC is now in the marketplace, the LCD mannequin will follow in mid-2022.
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