Technical Sheet

CALEFFI
ACCREDITED
ISO 9001 No. 0003
ISO 9001 FM 21654
LOW LEA
D
LOW LEAD
Lead Plumbing Law Certified by IAPMO R&T
MixCal
Adjustable three-way
thermostatic mixing valve
521 series
01050/12 NA
Function
The Caleffi MixCal
three-way thermostatic mixing valve is used in
systems producing domestic hot water or in hydronic and radiant
heating systems. It maintains the desired output temperature of the
mixed water supplied to the user at a constant set value compensating
for both temperature and pressure fluctuations of the incoming hot and
cold water. The MixCal
is fail cold: for any failure of cold or hot inlets or
valve function, the hot water port closes.
The valve has been specifically certified to ASSE 1017 and IAPMO R&T.
Product range
521___A series Adjustable thee-way thermostatic mixing valve ..............connections 1/2", 3/4", 1" NPT male union and sweat union
521___AC series Adjustable three-way thermostatic mixing valve
with inlet port check valves .............................connections 1/2", 3/4", 1" NPT male union and sweat union
521591A, (AC) series Adjustable three-way thermostatic mixing valve,
outlet temperature gauge (inlet port check valves) ...................................connections 3/4" sweat union
521619A, (AC) series Adjustable three-way thermostatic mixing valve,
outlet temperature gauge (inlet port check valves) .....................................connections 1" sweat union
Technical specification
Materials - body: low-lead brass (<0.25% Lead content)
- shutter, seats and slide guides: PPO
- springs: Stainless steel
- seals: EPDM
Performance
Suitable fluids: water, glycol solution
Max. percentage of glycol: 30%
Setting range: 85–150°F (3065°C)
Tolerance: ±3°F (±2°C)
Max. working pressure (static): 200 psi (14 bar)
Max. working pressure (dynamic): 70 psi (5 bar)
Max. hot water inlet temperature: 200°F (93°C)
Max. inlet pressure ratio (H/C or C/H): 2:1
Minimum temperature difference between
hot water inlet and mixed water outlet
for optimum performance: 27°F (15°C)
Minimum flow to ensure optimal performance: 1.3 gpm (5 L/min)
Certified to: ASSE 1017
Lead Plumbing Law* Compliance: (0.25% Max. weighted
average lead content)
*Lead Plumbing Law Certified by IAPMO R&T
Connections - NPT male union: 1/2"–1"
- sweat union: 1/2"–1"
Replaces 01050/10 NA

Summary of content (6 pages)