1. During the design phase, foresee the largest number possible of cartridge heaters in order to reduce the density of each heater and to distribute the heat uniformly.

2. It is reccomanded that the distances between the heaters should be:
1,5 times the cartridge diameter
1 time the cartridge diameter in direction of the external side of the lump to heat



3 The density and the working temperature are the two critical factors that mainly condition the element life; in
order to obtain a better thermal conduction in advantage of the heater is necessary to made the holes with
minimum tollerances (ISO H7 is advised for cartridge HD series) and a good finishing ( holes without groove).


4. The thermal dilatation of the lamp to heat must not change the hole measures precision because it can give negative effects to the heater.

5. The cartridge must be inserted inside the hole along all its length.

6. Protect the leads from penetration of liquid fluids and gases in order to prevent short circuit or dielettric deterioration of the sealing zone of the cartridge.

7. If you use grease or spray to make easier the heaters assembling and dismantling ( not to correct a little exact holes), pay attention not to attack the sealing zone (leads exit).

8. Respect the maximum working temperature of the leadwires insulation.

9. Put the leadwires in order to avoid points of tension or contact which can demage the insulation in short time.

10. Respect the wattage

11. Put the thermocouple in a equidistant position from the heaters in order to avoid high thermal inertia.

12. In case of heaters with built-in thermocouple, respect the polarity.

13. We advise to use thermoregulation system of new generation, the thermoregulator with on-off functioning system can not assure a sensible control of temperature , on the contrary in a lot of cases they are reason of great thermal shock.

14. In case of long period storage, we advise to keep the heaters in dry places because the magnesium-oxide is an hygroscopic material and it absorbes moisture.

15. To make up for the leak of heat and to reduce the consumptions, thermically insulate the lamp to heat ( pay attention to fixing points).