In many functions within the oil and gasoline industry, the chemical industry, and even the food trade, pumps that work reliably and supply high efficiency are wanted. At the same time, they will need to have convincingly low investment costs. With the Ecosmart diaphragm metering pump, the German Lewa GmbH has provided a cost-attractive and protected mannequin that may handle flow rates of up to 300 l/h for a few years. For use in functions with larger circulate charges, the pump expert from Leonberg, Germany, is now increasing its product vary with two new sizes. In addition to the LCA model, the Ecosmart will also be obtainable within 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 flow fee of up to 528 gallons per hour. The most permissible operating pressure for both models is 50 bar and 600 kilos respectively. The stringent use of comparable parts inside the Ecosmart product family keeps manufacturing costs and subsequently the final worth low. At the identical time, a excessive level of security can be guaranteed by focusing on all essential design features such because the pressure reduction valve or the proven sandwich diaphragm with continuous monitoring. The LCC variant was made out there on the finish of 2021 and the LCD mannequin might be obtainable by mid-2022.
In addition to the confirmed diaphragm metering pumps of the Ecoflow collection, Lewa has supplied the less expensive Ecosmart pump for a number of years. This is mainly because of the truth that though a reliable pump unit is required in numerous processes, at the same time comparatively low discharge pressures within the decrease two-digit range require less complex pump expertise. With the Ecosmart LCA within the single pump version, however, only a flow rate of under eighty gallons per hour was previously possible. In order to have the flexibility to supply the Ecosmart for applications with higher move rates, the engineers at Lewa started developing two extra, bigger pump variants in 2019. The aim was to scale up the Ecosmart to larger purposes with the proven security level and high quality Lewa components with out significantly increasing the low funding cost typical for this pump sequence. This was to be achieved by a constant modular principle throughout the pump collection, as nicely as a strict give consideration to the essential capabilities and options. เกจวัดไนโตรเจนราคา demanded the usual Lewa suitability for unrestricted steady operation over a few years. Options for integrating the pumps into automated techniques by way of analog management alerts or bus techniques are additionally a matter in fact.
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 carried out 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 less than 80 gallons. In the case of the extra highly effective LCD model, the engineers additionally decided to extend the stroke size so that a most move fee of 528 gallons per hour could probably be achieved. Both pump sorts 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 as the efficiency of the pump was the operational reliability typical of Lewa acquainted from different pump sequence. For this objective, particular person, important features such as the integrated stress security valve or the sandwich diaphragm were taken over from the Ecoflow fashions. The individually adjustable stress 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, also ensures that the PTFE sandwich diaphragm at all times works in the proper place. It cannot be overstretched or broken during start-up. Thus, the pump is protected towards operating errors or upset operating circumstances. Finally, the standard diaphragm monitoring system checks the situation of the diaphragm and warns plant operators instantly if there is any injury. This reliably prevents cross-contamination between the pump and the piping system and ensures operational security always, especially in sensitive areas with poisonous fluids. However, diaphragm monitoring isn’t used as a end result of Lewa diaphragms of this collection normally achieve service lives of several years – even underneath full load and continuous operation.
A key point was to maintain manufacturing costs inside an analogous vary to the small LCA variant, thereby creating enticing market costs for functions with less demanding requirements and lower working pressure. To do so, the design of the 2 new pump sizes wanted to combine elements which are as similar or at least comparable as possible in order to keep away from excessive manufacturing prices. In this manner, the Lewa engineers have been capable of efficiently implement the common elements strategy that had already been practiced many instances.
Pump customers also benefit from this intelligent modular principle, as many put on elements can be utilized throughout pump varieties. This considerably simplifies the spare elements inventory. At the same time, the modular principle additionally allows particular person adjustments to the respective application. For instance, stroke frequencies or plunger diameters can be chosen individually. The basis for this is the M900 pump head, which is already used in the LCA variant and in the Ecoflow program.
Lewa Ecosmart LCC in heated cabinet.
GOOD INTEGRABILITY FOR PLANT CONSTRUCTION COMPANIES
The pump’s flexibility additionally offers advantages for plant building: It permits the Ecosmart pump to be oriented both vertically or horizontally, making it simpler to combine the unit into methods with limited or confined spaces. In addition, the pump head of the new LCC and LCD fashions is aligned at right angles to the plunger axis, leading to a particularly compact format. In many pumps, the pump head is on the same axis as the plunger, which frequently leads to cumbersome pump dimensions. The 90-degree orientation avoids this with the new models. This advantage is achieved by the extraordinarily compact and fully newly developed, cost-effective diaphragm drive.
In order to ensure the lengthy service life typical of Lewa pumps, solely high-quality, sturdy materials are used within the LCC and LCD versions. Toxic and abrasive substances can stress the pump significantly and so quite lots of materials can be used on the wet finish, which are additionally efficiently used in the high-pressure variants of the Ecoflow series. Many high-quality elements from the Ecoflow collection are also used for the drive units, using the widespread elements strategy. The result is robustness and durability that is uncommon in this pump class. In addition, all Ecosmart pumps have been designed with a single oil bath, which is used for each the lubrication of the drive unit and the hydraulics of the pump head. This eliminates the extra complex lubrication by way of two separate oil techniques and ends in a much less complicated design, which not solely facilitates operation but also reduces upkeep work.
Last but not least, the model new LCC and LCD versions—like the LCA—comply with the U.S. business standard for metering pumps API 675, making certain nearly unlimited usage for quite a few demanding processes in a broad range of industries.
USE IN THE CHEMICAL INDUSTRY
For example, when metering solvents within the chemical trade, pumps are wanted that on the one hand meet the very best specification requirements and on the opposite hand are nonetheless cost-effective. Here, the Ecosmart pump with its higher performance is ready to meet exactly these necessities, as it has been exactly engineered for purposes within the lower pressure range as a lot as 50 bar (600 pounds). The larger versions of the Ecosmart pump are additionally suitable for industrial water treatment, similar to in seawater desalination or industrial cooling circuits. What counts here above all is compactness and cost-effective design, which the entire Lewa Ecosmart sequence fulfills thanks to its revolutionary design precept.
Before the new pump variants are available to clients, numerous in depth exams might be carried out. They will ensure that the items also meet the high inner company necessities for reliability and performance in operational apply. They embody, on the one hand, continuous load exams of as a lot as a quantity of tens of hundreds of hours and, on the other hand, overload checks. In the latter, the pump is run repeatedly at up to 20 % above most stress to additional validate its robustness. Special exams are carried out in heated cupboards to proof that the pumps additionally carry out completely underneath extreme ambient situations. After successful completion of all exams and last adjustments, the Ecosmart model LCC is now in the marketplace, the LCD model will comply with in mid-2022.