Cartridge_Information

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         CARTRIDGE HEATER
Main Page                                                         Mica Insulated
                                                                                     Band Heater
Pratik Heat Products cartridge heaters are designed and engineered for use where concentrated heat is desired where space is limited. These are available with simple terminal leads or male connectors with the given diameter in ld. 0.010" tolerance - Brass Sheathed. If any be quoted against inquiries.

Dia/Length	SS 9.5	Br 9.5	SS 12.7	Br 12.5	SS 16.00	Br 15.8		Br 18.8
in mm	High Watt	Low Watt	High Watt	Low Watt	High Watt	Low Watt	High Watt	Low Watt
50	----	50	80	----	100	----	----	150
75	----	100	----	125	----	150	----	200
100	250	125	400	150	600	200	----	250
125	300	150	500	200	750	250	----	300
140	350	175	600	250	900	300	----	400
150	350	175	600	250	900	300	----	400
160	400	200	700	300	1000	350	----	450
175	400	200	700	300	1000	350	----	450
200	500	250	800	325	1150	400	----	500
255	550	275	900	350	1300	450	----	550
250	600	300	1000	400	1500	500	----	600
275	650	325	1100	450	1650	550	----	675
300	700	350	1200	500	1800	600	----	750
Max Length	300 mm	300 mm	300 mm	900 mm	300 mm	900 mm	----	900 mm

For sizes not mentioned (DIA OR LENGTH) PHP will manufacture a cartridge heater as per customer’s specification.

INSTALLING PHP CARTRIDGE HEATERS

IMPORTANCE OF PROPER SIZE HOLES :
The most important thing to remember about the installation of a cartridge heater is that the cartridge heater should be close fit in the hole into which it is inserted. This results is fast heat transfer to the surrounding material and aids in keeping the element as cool as possible for a long life.

INSTALLATION :
Cartridge units are made with special tubing which is a few thousandth under-size to ensure a free fit for easy installation. To install cartridge heaters, drill and ream holes to proper length and the nominal diameter � 0.001" max. of the cartridge heater ( 3/8", 1/2", 5/8" etc.) e.g. a 1/2" cartridge heater actually measures 0.497" dia. A hole should be drilled and reamed to 1/2" dia. � 0.001" to insure a proper fit. Always finish ream, drilled or cast holes to ensure a smooth, uniform metal contact. A knockout hole should be provided if possible to facilitate cartridge removal.

THE RECEPTACLE HOLE SHOULD BE FREE OIL BEFORE CARTRIDGE HEATER INSTALLATION TO AVOID CONTAMINATION AND SHORTEN HEATER LIFE.

PRECAUTION FOR LONGER LIFE OF HEATER
Terminal or Mgo Contamination : Moisture absorption can occur when element is exposed or stored in damp or wet climate which may result in dielectric. But it may also be the result of contamination by oils, acid, salts & fumes.

Overhead Failure : Elements that fit too loosely will have poor heat transfer and short life due to excessively high sheath temperature. They should be fittedted with minimum tolerance & in reamed holes.

Physical damage : Physical or mechanical damage can also result in failure of the heater as it can damage the element in the heater.

ADDITIONAL CARTRIDGE FEATURES

Distributed Wattage : Special Wattage Concentration for even heat distribution.
Grounded Junction : One conductor extending from heat distribution.
Cold Section : SPECIFY - location & Length.
Centreless Grinding : For close fit application
SPECIFY - dimension & tolerence
Thermo Couple : Built-in thermo couple available SPECIFY - type J or K.