GENERAL
Provide a quantity of_______ electric immersion heater(s) Model No. ________________as manufactured by HUBBELL Electric
Heater Co., Stratford, CT. The heater shall have a total rating of ________KW composed of___________ circuit(s) of ____________KW each when supplied with ________Volts ________Phase ________Hz electrical
power. The heater shall be a _____________( Specify: Flange or Screwplug )
type of__________ size. The heater shall be designed for full immersion in liquid and constructed of high quality grade materials to ensure a long service life. TUBULAR
The heater shall
consist of _________individual tubular elements of _________ " diameter. The properly sized Nickel-Chromium resistor wire for the element shall be verified by computer calculations to ensure the longest service
life possible. The resistor wire shall be factory inspected, tested, and verified as meeting rigid quality control specifications prior to being coiled. The resistor wire is to be centered in the sheath and insulated with high
quality magnesium oxide. The magnesium oxide shall be compacted so that the terminal pin is firmly secured allowing for a maximum torque of 8 inch lbs. when tightening terminal hardware. The tubular sheathing shall be copper (
rOptional Specifications: Incoloy, Type 304 or 316 or 321 stainless steel, Steel, Teflon coated, Titanium, Monel, Inconel ) and have a
maximum watt density of ________watts/per square inch with a __________ " cold section and a total immersed length of ____________". Non-Ferrous element spacers shall be supplied when required.
TERMINAL HOUSING
The heater (shall, shall not) include a terminal housing. The terminal housing shall be a general purpose NEMA 1 enclosure (r
Optional Specification: Nema 4 watertight, explosion resistant ) and supplied with a quantity of__________ electrical conduit connections of _____________" size each.
In addition, the heater may be supplied with the following optional features:
rOption Built-in thermostat with a 60-250oF range
rOption Built-in thermowell
rOption Factory fitted thermocouple strapped to the element sheathing
rOption Factory fitted element baffle system
rOption Passivation of material
rOption Electropolishing of material
rOption Hermetic seals for superior moisture protection
rOption Individually replaceable element hairpins
rOption Liquid Die Penetrant Testing
rOption ASME Certification
rOption Construction to MIL-H-22577
rOption ____________________
rOption ____________________ Warranty
The heater manufacturer shall
warranty the entire immersion heating element against defects in workmanship and material for a period of one (1) year from date of start-up, provided that the unit is started within three (3) months of date of shipment and
installed and operated within the scope of the heater design and operating capability. |
