Electric Heating Co., Inc

One More on MgO

Cartridge heaters use Magnesium Oxide (MgO) for internal insulation ... isolation of the resistance coil from the sheath of the heater.  MgO is very hydrophilic ( it has a high affinity for water) and will suck up environmental moisture.  When we ship heaters, they are sealed in a plastic bag with a desiccant to keep the heater dry. 

When heaters are stored at a users location, it is best to keep them sealed in the bag in which they arrived.  But our customers often apply a different level of care to inventory. Heaters are often stuck in a drawer in an open bag after one or two are pulled out.  Or they can be pulled out of the bag and placed on a shelf.

A maintenance person may pull the heater out of the drawer some number of months later and install it in the machine, only to find that it trips the breaker, telling him that there is a short.  Depending on the sensitivity of his circuit breaker, it could be absorbed moisture that is causing the problem.  Simply drying out the heater will solve this dilemma. 

This can be done by one of many ways: simply place the heater on a hot / warm surface of the machine for a time prior to installation.  Or the heater can be energized at 1/2 voltage ...if it is a 240 volt heater, plug it into a 120 volt (household) circuit for 5 minutes.  If you receive a complaint from a customer about a heater that appears to be shorted before it was even used, assure him that Dalton Electric 100% tests their heaters before shipping, and suggest that the customer might try drying out the heater before use.

Friday Funnies

HOMONYM HUMOR

1. He who jumps off a bridge in Paris is in Seine.

2. A man's home is his castle, in a manor of speaking.

3. Dijon vu - the same mustard as before.

4. Practice safe eating - always use condiments.

5. Shotgun wedding: A case of wife or death.

6. A hangover is the wrath of grapes.

7. Dancing cheek-to-cheek is really a form of floor play.

8. Does the name Pavlov ring a bell?

9. Reading while sunbathing makes you well red.

10. When two egoists meet, it's an I for an I.

Dalton Electric Heating Co., Inc (978)356-9844
28 Hayward Street Ipswich, MA 01938 USA

(C) Copyright 2006 - 2008. Dalton Electric Heating Co, Inc. All Rights Reserved.