Life Expectancy

Life Expectancy

Life Expectancy


How long does a Watt-Flex® cartridge heater last?  This is a common question that does not have

a definitive answer. It depends on a variety of factors including size of the bore, heat sink material,

watt density of the heater, set point temperature, type of controller, amperage (function of voltage),

presence of contamination, shifts per day and a number of other factors.  We state that our heater

will last up to four times longer in the same application as a conventional heater ... but where do we

get that number?


In house tests can be skewed to produce favorable results so we choose to look at real world

applications and measure our success from customer testimonials.  Back from a trip, one of our

Regional Managers reported that he was in a shop looking at a machine being rebuilt. As part of their

PM the customer was replacing the Watt-Flex cartridge heaters and gave him the old units. From

the date code he found the heaters was over 11 years old and had operated almost continuously

with a reasonably high watt density. Further tests on the heaters proved them to be not only electrically

sound but still within the resistance spec.


This customer had tried less expensive conventional heaters but never got more than one year's

service from them.  We are always promoting the issue of price vs. cost ... this was one customer

that understood the concept well. 


               Friday Funnies


A doctor made it his regular habit to stop off at a bar for a hazelnut daiquiri on his way home. The

bartender knew of his habit, and would always have the drink waiting at precisely 5:03 p.m. One

afternoon, as the end of the work day approached, the bartender was dismayed to find that he was

out of hazelnut extract.


Thinking quickly, he threw together a daiquiri made with hickory nuts and set it on the bar. The doctor

came in at his regular time, took one sip of the drink and exclaimed, "This isn't a hazelnut daiquiri"!


"No, I'm sorry," replied the bartender, "it's a Hickory Daiquiri, Doc."


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