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Watlow
Watlow Flange Immersion Heater
Quote on request
No online payment · add lines to RFQ BOM
ANSI flange immersion; WATROD; to 200 kW / 120 W/in². RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Sheath temperature capability: Alloy 800/840 up to 1600 °F (870 °C); 316/304 SS up to 1200 °F (650 °C); steel up to 750 °F (400 °C)
Accuracy
N/A (heater assembly)
Output
N/A (heating assembly; optional thermostats / Type J or K thermocouples)
Supply
UL/CSA recognition up to 480 VAC; routine supply 240–480 VAC; wattages 150 W to 200 kW
Protection
General-purpose terminal enclosure standard; optional moisture-resistant / Enclosure 4 / explosion-proof CSA enclosures
Ambient temperature
Per process design and enclosure option
Fits large-tank immersion heating where you need a Watlow ANSI flange immersion heater with WATROD tubular elements, up to 120 W/in², and wattages from 150 W to 200 kW.
Key advantages
- Elements — WATROD tubular elements brazed or welded to ANSI flange
- Watt density — Up to 120 W/in² (18.6 W/cm²)
- Electrical — UL/CSA recognition up to 480 VAC; wattages 150 W to 200 kW
- Flanges — ANSI B16.5 Class 150, 3–14 in; lift lugs standard
- Sheath — Alloy 800/840 to 1600 °F; 316/304 SS to 1200 °F; steel to 750 °F
Typical applications
- Large process tanks and vessels.
- Oil and water bath heating.
- Skids needing bolted heater removal.
Selection guide
- Flange size / class — Tank nozzle match (3–14 in Class 150 typical)
- kW / V — Heat duty to 200 kW
- Sheath — Alloy vs SS vs steel
- Sensors — Optional TC / thermostat / thermowell
- Enclosure — GP vs moisture-resistant / explosion-proof
Common mistakes
- Mismatch flange class vs vessel rating.
- Dry-firing above liquid level.
- Wrong sheath for process chemistry.
When to RFQ / what to tell us
- Fluid, T, P, flange size.
- kW/V; sheath; enclosure; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 21710 |
| Brand | Watlow |
| Model | Watlow Flange Immersion Heater |
| Product type | Immersion Heater |
| Sheath temperature capability | Sheath temperature capability: Alloy 800/840 up to 1600 °F (870 °C); 316/304 SS up to 1200 °F (650 °C); steel up to 750 °F (400 °C) |
| Supply / wattage | UL/CSA recognition up to 480 VAC; routine supply 240–480 VAC; wattages 150 W to 200 kW |
| Watt density | Up to 120 W/in² (18.6 W/cm²) |
| Element type | WATROD tubular elements brazed or welded to ANSI flange |
| Sheath materials | Alloy 800/840, 316 SS, steel (standard WATROD options) |
| Sensors | Optional integral thermowells; ASTM Type J or K thermocouples; single/double-pole thermostats |
| Enclosure | General-purpose terminal enclosure standard; optional moisture-resistant / Enclosure 4 / explosion-proof CSA enclosures |
| Approvals | UL; CSA |
| Mounting | ANSI B16.5 Class 150 flanges 3–14 in; lift lugs standard |
| Notes | Watlow standard flange immersion heaters (HAN-SFIH-0719). Specs from watlow.com ANSI flange immersion heaters specification sheet. |
Documents
- Watlow flange immersion documentation — request current OEM PDF on RFQ — request current OEM PDF on RFQ
FAQ
Q: Max wattage? A: Configured from about 150 W to 200 kW.
Q: Flange sizes? A: ANSI B16.5 Class 150 typically 3–14 in.
Q: What should I send for a quote? A: Fluid/T/P, flange, kW, materials, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Sheath temperature capability: Alloy 800/840 up to 1600 °F (870 °C); 316/304 SS up to 1200 °F (650 °C); steel up to 750 °F (400 °C) |
| Accuracy | N/A (heater assembly) |
| Output | N/A (heating assembly; optional thermostats / Type J or K thermocouples) |
| Supply | UL/CSA recognition up to 480 VAC; routine supply 240–480 VAC; wattages 150 W to 200 kW |
| Protection | General-purpose terminal enclosure standard; optional moisture-resistant / Enclosure 4 / explosion-proof CSA enclosures |
| Ambient temperature | Per process design and enclosure option |
| Approvals | UL; CSA |
| Mounting | ANSI B16.5 Class 150 flanges 3–14 in; lift lugs standard |
| Sensor type | Optional integral thermowells; ASTM Type J or K thermocouples; single/double-pole thermostats |
| Notes | Watlow standard flange immersion heaters (HAN-SFIH-0719). Specs from watlow.com ANSI flange immersion heaters specification sheet. |
| Watt Density | Up to 120 W/in² (18.6 W/cm²) |
| Element Type | WATROD tubular elements brazed or welded to ANSI flange |
| Sheath Materials | Alloy 800/840, 316 SS, steel (standard WATROD options) |