DESCRIPTION

Technical Description

The trainer was designed for heating and plumbing trainees.

The four-way mixing valve in a heating system controls the circulation and feed flow temperatures of the water flowing in the heating system and the boiler return flow temperature. It is possible to add the hot water required and to connect radiators. The differential pressure across the pipe system is limited using a relief valve. Bimetallic thermometers indicate relevant temperatures. 

Learning Objectives / Experiments

- Function and operating behaviour of a four-way mixing valve 
- Effect of the mixing ratio on feed and circulating flow temperature
- Effect of mixer setting on the flow rate

In conjunction with other trainers in the HL 100 series, it is possible to set up a complete heating system.