8 PRODUCT NEWS DOMESTIC PUMPS OFFER REDUCED ENERGY CONSUMPTION SOLAR POWERED PUMP THE FIRST PRODUCTS RELEASED by Calpeda under the company’s e-idos brand are now making their way onto the market. The stainless-steel domestic pumps have been re-engineered to work with a new motor technology, coupled with an onboard pressure control and monitoring system. This new range includes the Calpeda self-priming pumps, NGX Eco and MXA, along with the MXP series of multi-stage centrifugal pumps. There are 12 models in all, capable of flows up to 100 ltr/min and heads up to 50m. The new fully programmable plugand-play system introduces many features, including a high efficiency asynchronous single-phase motor, a capacitor not stressed in voltage, uniform and lower motor operating temperatures and motor power control. Programmable re-start pressure is also offered along with no hydraulic losses from the sensing devices, voltage and current control, monitoring of the maximum starting current, the elimination of water hammer and a reduced need for an expansion tank.
MOTOR CONTROL
The technology also offers built-in dry-run protection, air detection in the pump and during the filling cycle, overload control and motor overheating motor protection, pump jamming protection, overcurrent protection, power supply control, system leakage control and high flow-rate pipe failure detection. The units incorporate an easy to use interface with an LCD screen to facilitate programming and operational monitoring. Tests have confirmed a reduction in energy consumption of up to 24% when compared to some other pumps. www.calpeda.co.uk
CHEMICAL PUMPS PROMISE LESS DOWNTIME CHEMICAL PUMP MANUFACTURER, Crest, has introduced the AME range of heavy-duty magnetic drive process pumps. Constructed using a high purity PFA lining the pumps are suitable for use in corrosive of applications even up to temperatures of 150°C. Traditionally, the biggest concern with seal-less pumps made from engineering plastic has been the shaft support system which must be strong enough to withstand the radial forces during operation. Under high temperatures and pressures the shaft support can weaken, resulting in vibration and wear which can significantly reduce the pump’s life. According to Crest, the AME’s doubleended shaft support is stronger than any other with an integral ‘V’ shape front support which is part of the metal casing armour that has been PFA lined. This
Quarter 1 2019
approach improves the liquid flow to the impeller, increasing operational efficiency and reducing net positive suction head (NPSHr). The rear of the shaft is then supported in the PFA lined containment shell and reinforced by a metal support ring and carbon fibre cover. The second key factor to consider if a seal-less plastic pump is genuinely to be heavy-duty is whether the impeller is built to last. Traditionally, an ETFE or PFA mag drive pump will be fitted with a separate impeller and inner magnet. But in applications of high pressure or temperature, the impeller can deform, resulting in damage and reduced performance. The AME pump is also constructed in such a way that the impeller and magnet capsule is formed as one piece which eliminates the possibility of the impeller loosening. For further operational stability and rigidity, a metallic structure is embedded from the magnet capsule to the impeller blade. Together, these two approaches to the AME pumps’ design ensure they are truly heavy-duty, meaning a longer life resulting in less downtime and increased productivity.
MOTOR AND DRIVE TECHNOLOGY manufacturer, WEG, has unveiled a new optional kit for its CFW500 series of variable speed drives (VSDs) that facilitates pump motor control through photovoltaic (PV) solar cells. The compact, energy saving CFW500 Solar Drive comprises a plug-in module to simplify set up and installation. It is said to be suited to the control of centrifugal and submersible motor pumps installed in places where the power grid is unavailable or unreliable. The CFW500 Solar Drive works by converting the DC feed from PV panels into AC that can serve and control the motor pump. Importantly, the new kit has a function which provides automatic start/stop according to the available solar energy. Principal features of the CFW500 Solar Drive include continuous maximum power point tracking (MPPT), double PID for simultaneously controlling both DC voltage and pipeline pressure, and up to four distinct speed and pressure setpoints.
www.crestpumps.co.uk
www.weg.net www.bpma.org.uk
