Renewables

Valves for use on heating systems where control is by zone or thermostatic radiator valves.

Fitted between flow and return permitting circulation through boiler and helps prevent
unnecessary cycling of boiler.

● Temperature setting range: 0 - 110°C
● Max working pressure: 10 bar
● Medium: water, glycol solutions
● Max percentage of glycol: 30%

Sizes DN 40 (code 577800, 1 ½”) and DN 50 (code 577900, 2”) are equipped with a by-pass
to restrict the flow rate passing through the device and thereby increase the Kv value.

We recommend 100% filtration during commissioning and for the first few weeks of system operation. Then, during the “constant” phase, the device can be set to operate with by-pass to achieve a higher Kv.

● Working Temperature Range: 0-90°C
● Connection: F BSP
● Max working pressure: 3 bar
● Body: Technopolymer
● Finish: Technopolymer
● Max. percentage of glycol: 30%
● Vertical/Horizontal connection

Designed for use with Heat Pumps using R290 as medium. The latest iStop Anti-freeze valve from Caleffi is ideal for use on installations where higher supply temperatures can be reached, such as R290 heat pumps.

• Maximum working pressure: 10 bar
• Medium temperature range: 0–90 °C
• Ambient temperature range: -30–60 °C
• Opening temperature: 3 °C
• Closing temperature: 4 °C
• Material: brass

● Max working pressure: 10 bar
● Working temperature: -10°C - 110°C
● Manufactured according to the Directive PED 2014/68UE

● Max. working pressure: 10 bar
● Temperature range: 0–90 °C
● Ambient temperature range: -30–60 °C
● Opening temperature: 3 °C
● Closing temperature: 4 °C