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:
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”.
Technical Characteristics
MixCal™ Adjustable three-way thermostatic mixing valve
521 series
© Copyright 20
20
Caleffi
38476.1
3
www.caleffi.com
INSTALLATION AND COMMISSIONING MANUAL
1.
ASSE 1017/CSA B125.3, certified by ICC-ES, file
PMG-1357
2. Complies with
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,
as
certified by ICC-ES, file
PMG-1360.
1
