ADVERTORIAL TECHNOLOGY IN ACTION
Universal Differential pH Water Quality Sensors
R
outine sensor replacement is a necessary maintenance step in continuous online pH monitoring. The Sensorex
SD7500 Universal Differential pH Probe extends the working lifetime of sensors, reducing maintenance frequency, without compromising accuracy and reliability. Universal compatibility with virtually any brand of conventional pH transmitter enables easy upgrade of existing sensors for industrial and municipal wastewater treatment and neutralization; metal finishing and plating; wet fume scrubbers; chemical processing; and other online water quality and process applications. The SD7500 probe measures process pH differentially
with three electrode sensors: a process pH electrode, a pH reference (actually a second measuring pH electrode in a known pH 7.0 buffered cell solution protected by a replaceable salt bridge reference junction), and a titanium ground electrode. The result is a highly accurate differential pH measurement that is virtually unaffected by ground loop measurement errors. The three electrode design, coupled with durable Ryton®
Polyphenylene Sulfide (PPS) body construction, resists process contamination. The double junction construction of the replaceable salt bridge further guards against fouling, even in highly aggressive chemical environments.
Sensorex +1(714)8954344
www.sensorex.com
Metal component manufacturer cuts out stoppages with ABB variable speed drives
A
specialist manufacturer of bimetallic strips has improved the reliability of its production line by retrofitting two applications with ABB variable speed drives (VSDs). Samuel Taylor produces precision metallic components for the aerospace and automotive industries at its plant
in Redditch near Birmingham. One of its product lines is bimetallic strips, which it makes by forming a groove in a coiled length of copper. This groove is then inlaid with silver. The production line consists of a leveler, grooving and inlay machines, a bonder to permanently join the two
strips, and a recoiler. The recoiler is under torque control and recoils the strip on leaving the bonder. The recoiler originally used a DC motor but the need to replace the commutator brush gear meant that this
motor was often in for repair. The motor had been rewound and both motor and drive were over 20 years old. Samuel Taylor asked Adford CNC, a specialist in CNC machine tool servicing and repair, to retrofit the recoiler
with an AC motor. The original motor was changed for a 5.5 kW AC force fan-vented motor, controlled by a 7.5 kW ABB general purpose drive, ACS580. Alan Bolton, proprietor of Adford CNC, says: “As a modern, digital AC drive, the ACS580 offers many parameters to enable the commissioning engineer to precisely set or adjust the drive to suit the motor and application. This is far more than was available in the old style analogue DC drive unit that had variable or fixed resistors to set drive limits or match the drive to the motor characteristics.
ABB Ltd. 01925 741111
www.abb.co.uk Verderhus Screw Channel Centrifugal Pumps V
erderhus screw centrifugal pumps are suitable for the handling of flowable slurries, sludges and solidladen media such as in wastewater treatment such as thick sludge, sewage and the recirculation of lime chemical. The range has excellent utility in agricultural and related facilities such as chicken necks and bone-laden animal waste in abattoirs and macerated food or crops in the production of bio gas.
ADVANTAGES VERDERHUS SCREW CHANNEL PUMPS Verderhus screw-channel pumps are suitable for the handling of flowable slurries, sludges and solid-laden media such as in wastewater treatment such as thick sludge, sewage and the recirculation of lime chemical. Verderhus screw-channel pumps are suitable for the handling of flowable slurries, sludges and solid-laden media where traditional centrifugal pumps would struggle and positive displacement pumps would have a more expensive life cycle cost. Excellent areas where the Verderhus excels is in wastewater treatment such as thick sludge, sewage and the recirculation of lime chemical.
• Abrasion resistant pump • Dry well, submersible or vertical spindle pumps • Gentle, low shear pumping • High BEP efficiency > 70% • Large Ø Solids • Low energy use • Low NPSHr
• Minimal clogging • Solids to <10% sludge, <30% slurry • Viscosities to 3000 cps • Max. flows 1500 m3/h • Max. head 55 mwc
APPLICATION AREAS Biogas, Chemical processing, Construction, Food & beverage, Industrial processing, Mining, Paper & pulp, Pet-food processing, Power stations, Slaughterhouses, Waste water treatment.
Verderhus 01924 221 020
www.verderliquids.com/int/en/purchasing-screw-centrifugal-pumps-verderhus/
52 JULY/AUGUST 2017 | PROCESS & CONTROL
CONNECTINGINDUSTRY.COM/PROCESS&CONTROL
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