Cartridge heaters

High performance cartridge heaters type HLP represent the latest development of cartridge heaters of conventional design which T+H have manufactured for more than 40 years. The special construction renders possible an extremely high surface loading and thus a large power in a small area. In this way the element assembly opens an enlarged field of applications for electric heating to the design engineer. DIN 44921, page 2, specifies the standard diameters, lengths and sheath material of high performance cartridge heaters. Our standard range of high performance cartridge heaters includes all the diameters specified in the DIN standard. As far as length is concerned it includes all those specified in the DIN standard plus many more.

Specifications :

Limit values
Voltage: up to 400 V
Diameters: metric and imperial dimensions see type list
Capacity: minimum and maximum values depend on the dimensions of the cartridge
Leackage current: < 0,5 mA
Surface load: up to 50 W/cm2 (on the sheath)
Working temperature: up to 750°C (on the sheath)
Diameters: -0.02 mm to -0.08 mm of the ground covering in metric dimensions
+0.05 mm of the nominal diameter for imperial dimensions
Length: ±1,5%; at least however ±2 mm
Capacity: ±10%
other tolerances upon request
Connections: see page 24 continued.
Unheated ends: connection side 7-15 mm; far end 4-11 mm depen-ding on the type, other dimensions upon request.
Thermocouple: optional for all HLP type heaters
Cartridge covering: CrNi-steel, material no. 1.4541
Heating conductor: all current heating conductor materials, including NiCr 8020, CuNi 44
Heating conductor support: Pure magnesium oxide, highly compressed
Final Test: individual test according to DIN EN 60335 (VDE 0700)

Connections :

Compacted cartridge heaters type HLP have a supporting core which is centrally located very close to the outer sheath. The heating conductor made of the heatproof alloy NiCr 8020 is wound in one layer, around the supporting cores. The interspace is filled with pure magnesium oxide and is highly compressed. The bottom end of the cartridge heater is gastight welded; the covering is ground for precision tolerance. High performance cartridge heaters can also be supplied with VDE approved connection according to the illustrations on page 24.
Connessione tipo NA
Dimensioni in mm
ØA 6,5 8 10 12,5 16 20
B 3 4 4 4,5 4,5 5
C 45 45 45 45 45 45
Connessione tipo ISAN Certificazione
Connessione tipo NA Certificazione

some applications :

  • Plastics industry Nozzle heaters for extrusion dies, sistemi di iniezione a canale caldo per lo stampaggio di materie plastiche. hot runner systems, filter changing equipment
  • Shoe machine industry Vulcanising press and mould heating, joining machines, hot stamping
  • Foundries Core moulds and ingot moulds, die casting machines, vacuum furnace
  • Apparatus construction Hot plates, industrial baths, distillations plants, soldering baths, oil sump
    and laboratories heating, sterilising baths, oil economisers
  • Woodworking machinery Hot adhesive - melting- and depositing devices, hot stamping
  • Packing machine industry Stamping- sealing- and welding bar heating, carton closure machine, tube
    filling & closure machinery
  • Medical technology Inhaling devices & sterilisers, polymerisation devices, dialysis equipment
  • General machine construction Small air heater, expansion screw heating, bookbinding machines, cold