Heater Catalog - Watlow

Cartridge/Insertion HeatersMetric FIREROD Cartridge HeatersTermination Options (Continued)Stainless Steel HoseGalvanized ConduitMin. No-HeatMin. No HeatAMin. No-HeatMin. No HeatStainless steel hose provides the best protectionagainst abrasion from sharp edges or abrasiveequipment. It also offers ease of handling and wiring inabrasive environments.When the leads exit at a right angle to the heater, thehose is silver soldered to the sheath. Unless otherwisespecified, leads are 250 mm (10 in.) long and the hoseis 200 mm (8 in.) long. To order, specify stainless steelhose, lead length and no-heat section.Metric FIREROD Min. No-Heat Length SS HoseDiameter Straight Right Angle O.D.mm mm (in.) mm (in.) mm (in.)6.5 30 (1 1 /8) N/A 4.7 ( 3 /16)8.0 30 (1 1 /8) 15 ( 9 /16) 5.7 ( 7 /32)10.0 30 (1 1 /8) 17 ( 2 /3) 7.6 ( 3 /10)12.5 30 (1 1 /8) 18 ( 11 /16) 9.5 ( 3 /8)16.0 30 (1 1 /8) 20 ( 3 /4) 12.7 ( 1 /2)20.0 30 (1 1 /8) 21 ( 13 /16) 15.8 ( 5 /8)PTFE Seal and LeadsGalvanized conduit equals stainless steel hose in itsabrasion protection.The conduit is attached with a 90° elbow copper coupler,which overlaps the heater sheath. Unless specified,200 mm (8 in.) conduit is supplied, leads are 50 mmlonger than the conduit. To order, specify galvanizedconduit, lead length and no-heat section.Metric Min. GalvanizedFIREROD No-Heat Dimension Dimension ConduitDiameter Length A B O.D.mm mm (in.) mm (in.) mm (in.) mm (in.)6.5 12 ( 7 /16) 22 ( 7 /8) 29 (1 1 /8) 10 ( 3 /8)8.0 12 ( 7 /16) 22 ( 7 /8) 29 (1 1 /8) 10 ( 3 /8)10.0 12 ( 7 /16) 22 ( 7 /8) 29 (1 1 /8) 10 ( 3 /8)12.5 12 ( 7 /16) 28 (1 1 /8) 30 (1 3 /16) 14 ( 1 /2)16.0 12 ( 7 /16) 28 (1 1 /8) 34 (1 5 /16) 14 ( 1 /2)20.0 12 ( 7 /16) 29 (1 1 /8) 36 (1 7 /16) 16 ( 5 /8)Silicone Rubber Seal and LeadsBMin. No-Heat25 mm(1 in.)PTFE seal and leads protect the heater against moistureand contamination from lubricating oil, cleaning solvents,plastic material or fumes and organic tapes. This seal iseffective to 200°C (400°F) under continuous operation.Please note, when ordering this option, that a 25 mm(1 in.) minimum no-heat section is required to allowconstruction. Additional no-heat area may be requiredto keep the seal below effective temperatures. To order,specify PTFE seal and leads and lead length.Min. No-Heat Length25 mm(1 in.)Silicone rubber seals and leads protect the heater againstmoisture and contamination from lubricating oil, cleaningsolvents, plastic material or fumes and organic tapes.This seal is effective to 230°C (450°F) under continuousoperation. Epoxy potting for up to 260°C (500°F) forcontinuous operation is available upon request.Please note, when ordering this option, a 25 mm (1 in.)minimum no-heat section is required to allow forconstruction. Additional no-heat may be required tokeep the seal below effective temperatures. To order,specify silicone or epoxy seal and leads andlead length.WATLOW ®53