Protecting and Moving the World Through Innovation
Protecting and Moving the World Through Innovation
How Long Will Your Magnet Last
So how long should my permanent magnet last?
Your permanent magnet should lose no more than 1% of its magnetic strength over a period of 100 years provided it is specified and cared for properly. There are a few things that may cause your magnet to lose its strength:
- HEAT
- Heat above the maximum level rated for the magnet material in your separator will decrease the strength of the magnet. Standard rare earth material from MPI has a maximum temperature of 176°F and standard ceramic material has a maximum temperature of 400°F. Higher temperature materials are available and may have been used in your system. Consult the factory if you have questions on what the maximum temperature is for your system.
- IMPACT
- Sharp impacts to the magnet from physical abuse or handling can result in the decreased magnet strength. The magnet material inside your separator is brittle and these impacts can lead to fractures in the material, weakening its strength.
- WELDING
- Welding on or around the magnet can lead to decreased magnet performance. This can be a result of the heat or current generated from the welding process.
- LIQUID INGRESS
- If your magnet housing is compromised, moisture can enter the housing of the magnets. This can lead to oxidation of the magnet material which will eventually lead to a weakened magnetic system. If the housing is compromised, the magnet should also be replaced for sanitary concerns.
Metal Control Systems Audit
It is always best to consult a magnet professional while specifying your magnet.
It is MPI’s mission to support food manufacturers in promoting food safety and consumer protection. It’s no secret that Food Safety Modernization Act (FSMA) compliance is a main focus for food manufacturers today, which is why MPI is dedicated to being the only choice in complete metal control for food manufacturing facilities.
In addition to being MPI certified Metal Control System Auditors, our entire Regional Management Team has also been HACCP certified, enabling us to provide the most knowledgeable assistance in the industry with regard to food safety. We believe that earning this certification allows our team to provide more value to our customers, adds an additional layer to our audit program, and demonstrates our dedication to upholding industry standards and education on this important topic.
MPI accomplishes all this through customer education and Metal Control System Audits. These regularly conducted audits provide a comprehensive picture of a facility’s metal control system and provides proof of HACCP compliance and required documentation.
Schedule an Audit or Assessment
MPI’s Magnetic Pull Test Kit
MPI’s magnetic pull test kit is the most accurate and easiest method to test the strength of your magnets. This easy-to-use, compact gauge fits into tight areas and is battery-operated (four AA batteries included.). Boasting a capacity of 44 lbs. (20 kg), MPI’s magnetic pull test kit can measure pull in pounds, ounces, kilograms, newtons, or kilonewtons. It can maintain the last reading after release. Packaged in a hard-sided foam-padded carrying case, this compact unit includes all needed accessories and can be used to test a complete range of magnet types and configurations. The documentation generated from this test can be used for compliance in a Hazard Analysis and Critical Control Point (HACCP) plan or for documentation requirements under the Food Safety Modernization Act (FSMA).