Fig. 2900 Thermal Circulation Valve

Bronze thermal circulation valves, PN16.

Features and benefits:

• Ideal for domestic hot water systems to assist with protection against Legionella.
• Provides self-balancing, thermostatically controlled regulation of flow and disinfection.
• Thermal disinfection at temperatures above 70°C.
• Compact unit comprising isolation valve with thermometer access point.
• Incorporates a settable temperature sensing cartridge, factory pre-set at a standard 57°C.
• Has an accuracy of +/- 2°C at set temperature.
• WRAS Approved.

Operation:

• When the set point is preset to 57°C, the valve remains completely open up to a valve temperature of 52°C.
• Between 52°C and the set point of 57°C, the valve starts to close.
• When the set point temperature has been reached, a minimum volume flow is continuously flowing through the circulation system.
• If the storage temperature is further increased to temperatures greater than 70°C to effect disinfection, the valve increases the flow.