Design parameters
One sheet. Everything we need to quote.
These are the parameters that define a tubular heating element. State each value – or mark it “to be proposed” – and our engineering team returns a technical review with the quotation.
The ranges reflect series production. Values per product group are in the specifications by product group; why each value matters is explained in the design guide.
Series production
Parameters
What to specify – and what we work with.
Typical ranges and options from series production. Designs outside them are possible when the application justifies it.
| Parameter | Typical range or options | Please state |
|---|---|---|
| Application and medium | Ovens, washing machines, water heating, small home appliances, professional kitchen, industrial equipment, air heating and defrost | Appliance, medium, flow and chemistry – hardness, chlorides, detergent |
| Sheath material | AISI 304, 316L, 321; Incoloy® 800 and 825; copper (liquid heating); nickel-diffusion coated stainless; titanium on request (water heating only) | Material, or “to be proposed” |
| Sheath diameter | 6.0 – 16 mm; most common 6.5, 8.0, 8.5, 10, 12, 13.5 and 16 mm | Diameter, or the space envelope |
| Rated voltage | 230 V single phase, 400 V three phase; 100 – 480 V for other markets; 12 – 48 V for defrost on request | Phases and connection: single, series, star or delta |
| Rated power | 100 W – 6 kW per element as standard (higher on request); multi-element assemblies up to 60 kW | Power per element and per circuit |
| Power tolerance | +5 % / −10 % (EN 60335-1); ±5 % on request | Only if tighter than standard |
| Watt density on the heated sheath | From 1 – 3 W/cm² (defrost) to 12 – 25 W/cm² (instantaneous water heaters), by product group | Limit or maximum sheath temperature, if known |
| Form and developed length | Straight, U, W, ring or three-dimensional, to drawing; developed length measured along the centreline | Dimensioned drawing – PDF, DXF or STEP |
| Cold zones | Typically 30 – 60 mm; 80 – 150 mm through flanges and walls; minimum about 25 – 30 mm | Length at each end |
| Terminations | 6.3 and 4.8 mm flat tabs, M4 – M6 studs, ceramic sockets and blocks, lead wires, cable with plug, terminal box IP54 / IP65 | Type, orientation, connector family |
| Sealing | Silicone or epoxy resin, PTFE bead, ceramic bead with cement, STF | Maximum terminal-end temperature; humidity tests |
| Mounting | Round flanges Ø 48 – Ø 180 mm; nipples G ½″ – G 2″ (BSPP, ISO 228-1) or NPT; washing-machine flange with clamp bolt; brackets and frames | Fitting drawing, gasket, thread standard |
| Safety devices and sensors | Thermal fuse (Thermofuse), NTC, PT100, BALÇIK TORMEC stem thermostat with safety cut-out, earth tab | Trip temperature, sensor type, connector |
| Approvals and documents | Designed to EN 60335-1 and the relevant part 2; VDE approvals for certified element families | Marks required; ISIR or PPAP level; RoHS and REACH |
| Volume and dates | From samples to series | Annual forecast, sample date, series start, packaging |
Defaults
If the drawing is silent, these values apply.
Standard acceptance values from the design guide. Tighter values can be agreed per project.
- Power tolerance
- +5 % / −10 %
- Dielectric strength
- 1250 V AC, 1 s, every element (≤ 250 V ratings; higher rated voltages per EN 60335-1)
- Insulation resistance
- Per drawing at 500 V DC (dry elements typically far above 100 MΩ)
- Leakage current
- At 1.15 × rated power input, to EN 60335-1: stationary class I heating appliances ≤ 0.75 mA or 0.75 mA per kW (whichever is higher), max. 5 mA
- Developed length
- ±2 mm up to 1000 mm
- Cold-zone length
- ±5 mm
Send the sheet – or the drawing.
Upload your drawing or specification with the RFQ. Our engineering team confirms feasibility, materials and a target price, and flags anything it would change.