WES Ltd / Weschem Ltd

50 Years of Innovation


Source: WES Ltd / Weschem Ltd

9 models (A3 & A4 Series Blue White peristaltic pumps) cover a flow range from 0.003-600 lph at pressures to 8.6 bar using no maintenance variable speed brushless DC motors. With a wide voltage input 96-264V, 1ph, 50/60hz, these pumps have a 2500:1 turndown and rated to IP66 for washdown.

From an operators perspective these pumps have a simple user friendly digital touch pad with an easy to use menu driven software and a VGA graphic multi colour backlit LCD which displays lph, motor speed, input signal values, service and alarm status.

From a control perspective these pumps can be run in 4-20mA, Pulse, Manual, Batch or automated ppm dosing and all have a remote start/stop function.

Feedbacks are multiple (4-20mA, one 6 amp relay and 3 contact closures) and can be assigned to monitor up to 17 different pump functions including Tube Failure Detection (TFD), Flow Verification Sensor (FVS), remote/local control setting, motor on, fault, current operating mode and others.

In addition, all pumps incorporate the Blue White patented Tube Failure Detection (TFD) system as standard, a safety sensor which protects operators and aides in tube replacement (patent pending) and a feature used to extend tube life (patent pending).

Peristaltic pumps do not have valves that can clog, are self priming and do not gas lock or lose prime, which makes them ideal for chemical dosing applications in potable water treatment, ie/ chlorination, dosing of ferric sulphate, coagulant  or polymer in wastewater treatment.

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