Technical Characteristics
Materials: -Body: low-lead brass (
<
0.25% lead content)
-Shutter, seats and sliding guides: PPO
-Springs: stainless steel
-Seals: peroxide-cured EPDM
Suitable fluids: water, 30% max glycol solution
Setting range (outlet temperature): 85–150
°
F (30–65
°
C)
Tolerance: ±3
°
F
(±2
°
C)
Max. working pressure (static): 200 psi (14 bar)
Max. operating differential pressure (dynamic): 75 psi (5 bar)
Max. recommended differential pressure: 20 psi (1.5 bar)
Max. hot water inlet temperature: 200
°
F (93
°
C)
Max. inlet pressure ratio (H/C or C/H) for optimum performance: 2:1
Min. temperature difference between hot water inlet and mixed
water outlet for optimum performance: 27ºF (15ºC)
Min. flow rate to ensure optimal performance: 1.0 GPM (3.8 L/min)
Lay length, hot to cold inlet: (½” & ¾” press connection) 3
5
/
8
”
(1” press connection)
4
1
/
8
”
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, certified by ICC-ES, file
PMG-1360.
Function
The Caleffi MixCal™ three-way thermostatic mixing valve is used in
systems producing domestic hot water or in hydronic and radiant
heating systems. With the unique mixing chamber design, MixCal™
produces very stable mixed water temperture as inlet temperatures
and pressures vary. Scale formation is minimized with anti-scale
polymer sliding surfaces, preventing siezing or erratic mixed
temperatures. O-ring seals made from durable peroxide-cured EPDM
resist wear from common water treatment additives such as chlorine
and chloramines.
Product range
521A Series Three-way thermostatic mixing valve:
“C” models include inlet check valves. “419, 519, 619” models include
outlet gauge adapter. Connections: union thread NPT male, sizes ½”,
¾”, 1”; union sweat, sizes ½”, ¾”, 1”; union press, sizes ½” , ¾”, 1”;
union PEX crimp, sizes ½” , ¾”, 1”.
MixCal™ Adjustable three-way thermostatic mixing valve
521 series
© Copyright 2017 Caleffi
38476.10
www.caleffi.com
INSTALLATION AND COMMISSIONING MANUAL
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