Caleffi 5231 20mm Heavy Duty Tempering Valve
Heavy duty 5231 series thermostatic tempering valve with 20mm unions
For use on high demand hot water systems with a flow rate between 10 and 92L/min
Recommended working pressure 100 – 500kPa (balanced)
Kv = 75L/min
Union connections with fibre washer seal (without check valves)
Temperature range adjustable 35 – 65°C
Temperature control +/- 2°C
Max. operating temperature 90°C
Body in dezincification resistant brass
Notes:
A minimum 20kPa dynamic system pressure is required for correct valve function excluding any system losses in pipework etc.
These valves are sized by flow rate, not by pipe size. Please speak to our technical team if you need further assistance.
Conditional guarantee:
5 years parts and labour
Body: dezincification resistant alloy: EN 12165 CW724R
Obturator: PSU
Springs: stainless steel (AISI 302)
Seal elements: EPDM
Adjustment range: 35–65°C
Accuracy: +/- 2°C
Kv = 92L/min
Recommended working pressure 100 - 500kPa (balanced)
Maximum working pressure (static): 14 bar
Maximum working pressure (dynamic): 5 bar
Minimum working pressure (dynamic): 0.2 bar
Maximum inlet pressure ratio (H/C or C/H): 2:1
Maximum hot water inlet temperature: 90°C
Minimum hot water inlet temperature: 50°C
Maximum cold water inlet temperature: 25°C
Minimum cold water inlet temperature: 5°C
Minimum temperature differential: 15°C
