ERH 4600 RF

The series 4600 heaters feature design characteristics which make these units unrivalled on the market. The high variability of the design allows a perfect adaption to any process conditions. Thousands of these heaters are in service on ships, in power stations or industrial applications all over the world.


The series 4600 heaters consist of a welded pressure vessel with an electric heating insert. The heating elements are positioned in protection tubes and are not in direct contact with the medium. They can be exchanged without draining and opening the pressure vessel. The design of the heating elements ensure excellent thermal reaction time and control accuracy.

Heat transfer

Due to the perfect hydraulic flow around the heating elements, the medium is gently heated to the specified temperature. The surface load (W/cm²) can be precisely adapted to the medium characteristics. Recommended surface loads:

0,8 W/cm²

lube oil/low flow rate of medium

1,1 W/cm²

high viscosity heavy fuel oils and average flow rate of medium

1,4 W/cm²

marine diesel fuels, light diesel fuels and high flow rate of medium

Features & Options

All heaters are equipped with built in safety temperature limiters (STB). Optional additional safety devices: flow switch, temperature limiter (self reset), PT-100 sensors and safety valves.

The heaters come with an efficient thermal insulation made of rockwool and galvanised steel sheet cover. The cover is also available made of stainless steel (polished upon request).

Standard: Flanges according to DIN EN 1092-1/11B1/DN15-DN250/PN16
Optional: Triclamp or threaded connections
The position of the connections can be adapted on request.









others on request

Heavy duty industrial painting with 2K structured PUR paint

Overview table of standard designs

customised units available on request

Download datasheet

Flow heater ERH 4600 RF