ARI-CONA 650 (AWH)

Liquid return temperature limiter PN40 / Class 150-300

Description

eClass-No.: 37019090
Application: Return temperature limitation for a pipe tracing system.
Medium: Steam, condensate, etc.

Scope of applications
Liquid return temperature limiters with temperature control are used for return control in heating systems.
The information complies to the Pressure Equipment Directive 2014/68/EU.
It is the responsibility of the machine planner to ensure compliance.
The special markings on the valve must be taken into account.
Refer to the catalogue sheet to see which materials are used in standard versions.
Please contact the supplier or the manufacturer if you have any questions.

Operating principles

(refer to Fig. 1 – Fig. 3)
Liquid return temperature limiters maintain a constant returning water temperature in a water system; if the returning water temperature falls, the valve will open wider to allow a greater flow into the water heater, and the reverse occurs with a rising temperature in the return line.
When the valve is in the closed position, a snall amount of water will still flow through the valve.
This is to ensure that the valve is sensing a representative sample of water in the system and allow rapid response to load changes.
The bi-metallic discs (pos. 24.6) in the controller (pos. 24) arch when heated, moving the annular slide valve (pos. 24.18) to the „closed“ position.
Conversely, if the discs are cooled by the process fluid, the flatten out, moving the annular slide valve towards the „open“ position.

Diagram