Tank bottom immersion heater K series

high-temperature

Product overview
KLC’s Ultra-High Temperature Ceramic immersion heaters (K-/KC-/KR-Series) heat to 1300℃ in dry air (or up to 25 W/cm²) and reach up to 98% thermal efficiency under water. The ceramic elements combine high thermal conductivity, excellent electrical insulation and strong chemical resistance in a compact form factor suitable for liquid heaters, steam generators and instant water heating devices.

Features

• Excellent insulation: leakage <10 mA even if damaged.
• High dielectric strength: survives 2500 V/50 Hz for 1 minute at room temperature.
• High temperature capability: up to ~1200–1300℃ in dry conditions depending on model.
• High watt density: in water up to ~70 W/cm² (model-dependent); in air up to <25 W/cm².
• Fast heat transfer and high underwater thermal efficiency (up to ~98%).
• Corrosion resistance to acids and bases; minimal scale buildup.
• Compact dimensions (typical thickness 4 mm) and long service life.

Applications

• Electric water heaters (instant and semi-storage) and liquid heaters
• Steam generators and steam heaters
• Instant hot water taps and ignition devices
• Air-conditioning heaters and HVAC components
• Packaging machinery and small appliances requiring compact high-power elements
• SPAs, solar heater supports, central heating and vehicle cold-start/warm-up devices

Application benefits

• No oxidation or significant electric leakage when used as immersion heater.
• No gas emissions; reduced safety hazards compared with some alternatives.
• Very low scale formation — extended lifetime.
• Does not burst causing pipe cracks; reliable mechanical behavior.
• High heating efficiency; often no preheating required.
• Small, lightweight and easy to integrate in compact products.
• Markedly higher corrosion resistance versus typical stainless steels (test-dependent).

Product Specifications — Series
K-Series: Immersion Heater (suitable for lower-temperature in-air use). KC-Series: Steam Heater (also as low-power water heater). KR-Series: other variants listed by model.

K-Series — Representative models (values per model and voltage)
Headers: Series | Model | A (mm) | B (mm) | C (mm) | Thickness (mm) | Rated Voltage (V) | Rated Power W (In Water) | Rated Power W (In Air) | Ref. Temp. in Air (℃)
K02- / K02-2180 | 17 | 88 | 119 | 4 | 110 V → In Water 500 W · In Air 220 W · Ref Temp 650℃; 220 V → In Water 1800 W · In Air – · Ref Temp >1200℃
K02-2250 | 17 | 88 | 119 | 4 | 110 V → In Water 700 W · In Air 300 W · Ref Temp 720℃; 220 V → In Water 2500 W · In Air – · Ref Temp >1200℃
K04-2250 | 30 | 54 | 85 | 4 | 110 V → In Water 700 W · In Air 300 W · Ref Temp 690℃; 220 V → In Water 2500 W · In Air – · Ref Temp >1200℃
K19-2280 / K19-2300 | 30 | 72 | 103 | 4 | 110 V → In Water 800–850 W · In Air 340–360 W · Ref Temp 650–790℃; 220 V → In Water 2800–3000 W · In Air – · Ref Temp >1200℃

KC-Series — Representative models (values per model and voltage)
Headers: Series | Model | A (mm) | B (mm) | C (mm) | Thickness (mm) | Rated Voltage (V) | Rated Power W (In Water) | Rated Power W (In Air) | Ref. Temp. in Air (℃)
KC02-2060a | 17 | 80 | 106 | 4 | 110 V → In Water 210 W · In Air 100 W · Ref Temp 400℃
KC02-2060 | 17 | 80 | 106 | 4 | 110 V → In Water 420 W · In Air 200 W · Ref Temp 630℃; 220 V → In Water 1500 W · In Air 600 W · Ref Temp 1200℃
KC02-1060 | 17 | 80 | 106 | 4 | 110 V → In Water 1500 W · In Air 600 W · Ref Temp 1200℃

Other Specifications

• Withstanding voltage: 2500 V/50 Hz for 1 minute without damage (room temperature).
• Current leakage underwater: normal ≤ 0.025 mA; damaged ≤ 10 mA.
• Thermal conductivity: 23–25 W/m·K.
• Coefficient of thermal expansion (0–1400℃): 3.1 × 10⁻⁶ /℃.
• Hardness (HRA): 92.0–94.0.
• Acid / alkali corrosion resistance: tested values versus sulfuric acid and sodium hydroxide (see datasheet).

Installation guidance — When heating liquid/water

• Ensure the element is fully immersed; partial exposure to air may cause breakage.
• After dry heating (evaporation), do not add water immediately to avoid cracks/damage.
• Ensure no adhesive residues are adhered to the product surface.
• Confirm correct rated voltage is applied for the selected model.
• Install vertically at the bottom of the container for best performance in instant water heaters; hot water outlet should be at the top and water level 30–40 mm above the element.
• To preserve dielectric performance in severe environments, consider adding a heat‑resistant rubber seal to exposed sections.

Common applications (examples)

• SPAs
• Semi-storage electric water heaters
• Solar heater supports
• Instantaneous hot water heaters
• Packaging machinery
• Central heating systems
• Vehicle cold-start / warm-up devices

Order information
Please provide when ordering: product model/series, rated voltage, rated wattage, lead wire length and intended application.

Technical characteristics

• Maximum operating temperature (dry): up to 1300℃ (model-dependent).
• Underwater thermal efficiency: up to ~98%.
• Typical thickness: 4 mm.
• Rated voltages commonly available: 110 V and 220 V (model-dependent).
• Rated power range (examples): ~210 W to 3000 W depending on model and voltage.