What is the difference between MD and WMD?
MD stands for Mag-Drive. WMD stands for Walchem Mag-Drive. In an effort to lower the cost of the MD pump which uses a Japanese motor, Walchem developed the WMD series. The Japanese motor and cast aluminum adapter bracket were replaced by a domestic (Fasco) motor and a polypropylene adapter bracket. A WMD will match the Hydraulics for the MD series but will typically be a little bit longer in length. The motor specifications and life expectancy are identical. Are these pumps UL/CSA/CE approved? Yes, no and sometimes. Always consult your Iwaki Walchem binder for precise information but there are some rules of thumb you can use. WMD products are always UL and CSA approved but not CE approved. All 115 V MD pumps are UL approved but not usually CSA approved. Most MD 220 V pumps are CE approved. At time, UL and CE are in conflict, case in point, the color of motor lead wires. Do you offer a submersible pump? No. None of our MD/WMD pumps can be submersed. For OEM applications (500+ pumps) ple
