Steam jet heaters are used to heat all kinds of liquids in vessels. Heating is achieved by means of direct condensation of steam. The steam condensate mixes with the liquid.
This document provides technical information for GEA Wiegand Steam Jet Heaters, specifically Type 18.1 with a threaded connection. It explains the application of steam jet heaters for heating liquids via direct condensation and describes the mode of operation involving motive steam and liquid acceleration.
The document includes performance charts for calculating heat flow and condensate flow, along with detailed connection dimensions, weights, and material specifications for standard constructions. It also covers alternative types, such as the flange-mounted Type 28.1 and the housing-mounted Type 38.1.
| Minimum steam overpressure | 1.5 bar |
|---|---|
| Weight (Size 1-80) | 1 kg |
| Weight (Size 7-80) | 21 kg |
| Housing material (Standard I) | cast iron EN-GJL-200 |
| Motive nozzle material (Standard I) | red brass |
| Thread standard | DIN ISO 228 |
A steam overpressure of at least 1.5 bar is necessary to overcome the static pressure of the liquid.
Yes, admitting air greatly intensifies the movement of the circulating liquid and can assist in avoiding condensation hammers.
Standard constructions use cast iron for the housing and either red brass or stainless steel for the motive nozzle.