Heater Catalog (Section) - Immersion Heaters - Watlow

Immersion HeatersExtendedCapabilityExtended Capabilities ForWATROD and FIREBAR Screw PlugImmersion HeatersOptionsPilot LightThe optional pilot light gives the operator visual indicationof heater on or off power status.The PL10 pilot light is configured to a maximum 250VACand supplied with 6 in. (152 mm) leads.The PL11 pilot light is rated for 480VAC and supplied with4 in. (102 mm) leads.Pilot lights may be attached to either single or doublepole thermostats with general purpose enclosure only.For moisture or explosion resistant terminal enclosures,contact your Watlow representative.To order, refer to the Ordering Information on page 234.Wattages and VoltagesWatlow routinely supplies screw plug immersion heaterswith 120 to 480VAC as well as wattages from250 watts to 38kW. If required, Watlow may configureheaters with voltages and wattages outside theseparameters. For more information on special voltageand wattage configurations, contact your Watlowrepresentative.Screw Plug MaterialsThe following screw plug materials are available:To order, specify screw plug size and material.Extended Screw Plug MaterialsWATROD304, 304H, 316H, 321 SSTitaniumAlloy 400 and 600Hastelloy C276Alloy 800/840Screw Plug SizesIncluding European• Gas (Gas Pipe Standard) – G1 1 /4, G1 1 /2, G2 in.(brass only)• BSP (British Standard Pipe) – 1 1 /2, 2 in.(stainless steel only)Contact your Watlow representative for sizes andmaterials not listed.Extended Sheath MaterialsThe following sheath materials are available on WATRODand FIREBAR heating elements:Extended Sheath MaterialsWATRODFIREBAR304 and 321 SSAlloy 400 and 600TitaniumHastelloy C276304 SSAlloy 800170 WATLOW ®