In all aspects of processing, there is a great need for pumps that handle shear-sensitive liquids and liquids that can adversely affect mechanical seals. In addition, these pumps are often required to have leak-tightness. Tony Peters of AxFlow in the UK analyzed the "Mouvex" pumping principle. The Mouvex principle, developed by Blackmer Pumps, is based on the operation of a reciprocating eccentric piston that creates positive pumping capacity for a positive displacement positive displacement pump. However, its behavior is quite sensitive and therefore well suited for both main considerations of shear and potential leaks. Mouvex Principle Pumps Mouvex Principle Pumps differ from other types of positive displacement pumps in that they do not agitate the liquid being pumped . Instead, the reciprocating pistons inside the pump chamber are used to pump liquid by eccentric movement, and the movement is gentle. The pump's direct-drive design requires neither a mechanical seal nor a magnet, thus making the pump leak-proof. Eccentric pump consists of two parts, namely a cylinder and a pump mounted on the eccentric shaft. When the eccentric shaft rotates, the pump core generates a pump room in the cylinder. The effect is to increase the size of the suction port and draw liquid into the pump room. The liquid is delivered to the discharge outlet, where the pump house is reduced in size. This action squeezes the liquid out into the discharge line. The Blackmer Mouvex C-Series and S-Series pumps are designed for fluids up to 36m3 / h and pressures up to 9bar. These pumps provide constant product flow regardless of pressure or viscosity. Coupled with automatic piston / cylinder wear adjustment, the pump ensures complete flow efficiency and high product stability at all times. In addition, the design ensures that the capacity measurement and dosing are highly accurate. The C Series Blackmer Mouvex C Series and S Series Pumps are based on the same principle of operation but were developed for very different applications. For C Series pumps, the eccentric shaft is enclosed in a metal capsule made of 316 stainless steel (Figure 1). The ATEX-compliant C-Series pumps can be made from either 316 stainless steel or ductile iron, which meets the 3A standards and the recommended hygiene standards required by EHEDG. The pump automatically starts and lubricates, allowing dry operation to clean any residual liquid in the suction and discharge lines. The pumped medium serves to lubricate all moving parts. No need to dismantle the device Clean the pump in place with a simple flush. Applications for this pump typically include the following industries: Chemicals, Resins, Cosmetics, Agrochemicals, Petrochemicals, Paper, Personal Care Products and Irritating Food and Beverages. Two diametrically opposite applications clearly demonstrate the performance of the C Series pumps. A C18i unit at a factory producing automotive coatings has been used by manufacturers that make cationic (pigmented) and cationic binders (no pigmented) for 4 years. These raw materials have a maximum viscosity of 100 cps and a flow rate of 18 m3 / h. The Mouvex pump was used to transfer the cationic binder from the stocker to a removable tanker truck, which in turn delivered the binder fluid to the carmaker's workshop. However, cationic binders can dry quickly and easily during tank loading, so a pump with a dynamic seal can not be used. Mouvex's seal-free design solves this problem, providing the operator with a "clean" solution. The same C18i design was used to pour orange concentrate in a food processing plant. The viscosity of the concentrate is 3000 cps and the liquid needs to be pumped at a pressure of 3 bar at a flow rate of 3 m3 / h. In this application, a cam pump or a peripheral piston pump is usually used and the customer wishes to optimize the pouring time. At the same time, end users want to help concentrate to meet the hygiene requirements for preparation in order to fill the concentrate in the bottle. Two C18i pumps were installed in parallel and by controlling the speed of both pumps, they were able to optimize the pouring time according to the viscosity of the orange concentrate. The pump has excellent priming performance, thus ensuring good pouring regularity and allowing the pump to run for several minutes in a dry environment, which is important for the final stages of the pour cycle. The pump has excellent capacity measurement accuracy, which allows it to be filtered while it is poured before it is ready for final preparation. Pump design with tight tolerance characteristics, it is this feature provides a good starting oiling performance. (Figure 2 S-Series Contrary to the above, the S-Series pump is a smaller, lighter device with a drive mechanism protected by a colorless, odorless, high resistance elastic sleeve (Figure 3). This allows the pump to be FDA approved (S4C and S6C). The S Series Mouvex pumps are well-suited for the food, beverage and personal product processing industries and are designed to clean CIP and SIP. The slow motion of reciprocating pistons provides accurate capacity measurement performance, And allow the pump to accurately dosing and mixing high and low viscosity liquids.In the process of recovering the coffee rinse solution, the product being pumped is a coffee extract that is again accelerated using two Mouuvex S4C pumps to deliver a mixture of varying concentrations Liquid into the refining tank (Figure 4). From this tank the coffee extract is sent to the refining plant where double pump units must work in three shifts (8 hours per shift) , So the need for high reliability.Mouvex pump seal-free design to provide this high reliability, and reduce maintenance needs, the pump is only open once a year for testing As it turns out, the S Series pumps are ideally suited for the production of a wide range of products in the dairy industry.For a plant supplying condensed milk to a spray tower, the main operating requirements include a constant flow rate of 8 m3 / h and a pressure of 7 bar. , But also for the efficiency and accuracy of volumetric measurements as the response time after any adjustment must be as short as possible without harmful changes.Supported S6C devices are able to work on a three shift basis (8 hours per shift) And meet the above requirements, also meet the CIP system, that is, flow rate of 30m3 / h four times a week. Blackmer Mouvex pump a lot of applications, are in line with ATEX, EHEDG and FDA requirements.In other types of positive displacement pump, the production Shear-sensitive products encountered in the mechanical seals caused by considerable problems, at the same time, corrosive liquids can lead to premature seal aging.Mouvex principle pump is not the case there is no wet pump core Rotate, thus creating a gentle, smaller shear force that is required by many processes.

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