Low lead high-flow thermostatic mixing valves
NA10341.03
© Copyright 2018 Caleffi
ASSE 1017
Function
The thermostatic mixing valve is used in systems producing domestic
hot water or in radiant heating systems. Its function is to maintain the
temperature of the mixed water supplied to the user at a constant set
value when there are variations in the supply pressure and temperature
of the incoming hot and cold water or in the flow rate.
The 5231 series thermostatic mixing valves are ASSE 1017 approved for
point of distribution and are designed specifically for systems requiring
high flow rates and precise, stable temperature control. Optional
stainless steel inlet port check valves are available separately, for field
installation only.
Product range
5231 series thermostatic mixing valve. NPT male and sweat union
connections, sizes 1", 1-1/4", 1-1/2", 2". Inlet port check valve s and
outlet temperature gauge optional.
Technical characteristics
Materials:
- body:
DZR low-lead brass (<0.25% lead content)
- shutter:
PPSG40
- springs:
stainless steel
- seals:
peroxide-cured EPDM
- check valve extension (field installed):
stainless steel
www.caleffi.com
5231 Series
INSTALLATION AND COMMISSIONING MANUAL
Suitable fluids:
water, glycol solutions
Max. percentage of glycol:
30% glycol solution
Mixed temperature adjustment range:
95 – 150°F (32 – 66°C)
Temperature stability:
± 3°F (± 2°C)
Max. operating differential pressure (static):
200 psi (14 bar)
Max. operating differential pressure (dynamic):
75 psi (5 bar)
Hot water inlet temperature range:
120 – 195°F (49 – 91°C)
Cold water inlet temperature range:
39 – 80°F (3.9 – 26.6°C)
Max. inlet pressure ratio (H/C or C/H) for optimum performance:
2:1
Min. temp. difference between hot inlet and mixed outlet for optimum perf: 20°F (11°C)
Max. water hardness:
10 grains
Certified to:
1. ASSE 1017/CSA B125.3, certified by ICC-ES, file PMG-1357.
2. NSF/ANSI 372-2011, Drinking Water System Components-Lead Content Reduction of
Lead in Drinking Water Act, California Health and Safety Code 116875 S.3874, Reduction
of Lead in Drinking Water Act, certifed by ICC-ES, file PMG-1360.
1
