Product Overview
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.
Caleffi North America, Inc.
3883 W. Milwaukee Road
Milwaukee, WI 53208
Tel: 414-238-2360 · Fax: 414-238-2366
sales@caleffi.com · www.caleffi.com
© Copyright 2017 Caleffi North America, Inc.
MixCal
™
521 series - press union connections
Adjustable thermostatic and pressure balanced mixing valve, certified by ICC-ES to ASSE 1017-2009 and CSA B125.3, approved for point of distribution
domestic water systems and radiant hydronic heating systems. Press connections ½", ¾" or 1" with union tailpieces. Low-lead brass body (<0.25%
Lead content) certified by ICC-ES file 1360. Meets requirements of NSF/ANSI 372-2011. Shutter, regulating seats and sliding surfaces in anti-scale
plastic, PPO. Seals peroxide-cured EPDM. Stainless steel spring. Maximum working temperature 200 degrees F (93 degrees C). Setting range 85
degrees F to 150 degrees F (30 degrees C to 65 degrees C). Maximum working pressure 200 psi (14 bar). Maximum operating differential pressure 75 psi
(5 bar). Tolerance ±3 degrees F (±2 degrees C). Flow rating: Cv 3.0. Minimum flow to ensure optimal performance: 1.0 gpm (3.8 L/min)
. Minimum flow rate
when recirculation flow rate is 1 gpm or greater: 0 gpm.
Provided with tamper-proof setting lock. Provide with optional inlet port check valves. Provide with
optional mixed outlet temperature gauge, 30 to 210 degrees F scale, 2 inch diameter for 1/2", 3/4" and 1" models.
MixCal
™
521 series - threaded union connections
Adjustable thermostatic and pressure balanced mixing valve, certified by ICC-ES to ASSE 1017-2009 and CSA B125.3, approved for point of distribution
domestic water systems and radiant hydronic heating systems. Threaded connections ½", ¾" or 1" NPT male with union tailpieces. Low-lead brass body
(<0.25% Lead content) certified by ICC-ES file 1360. Meets requirements of NSF/ANSI 372-2011. Shutter, regulating seats and sliding surfaces in anti-
scale plastic, PPO. Seals peroxide-cured EPDM. Stainless steel spring. Maximum working temperature 200 degrees F (93 degrees C). Setting range 85
degrees F to 150 degrees F (30 degrees C to 65 degrees C). Maximum working pressure 200 psi (14 bar). Maximum operating differential pressure 75 psi
(5 bar). Tolerance ±3 degrees F (±2 degrees C). Flow rating: Cv 3.0. Minimum flow to ensure optimal performance: 1.0 gpm (3.8 L/min)
. Minimum flow
rate when recirculation flow rate is 1 gpm or greater: 0 gpm.
Provided with tamper-proof setting lock. Provide with optional inlet port check valves. Provide
with optional mixed outlet temperature gauge, 30 to 210 degrees F scale, 2 inch diameter for 1/2", 3/4" and 1" models.
SPECIFICATION SUMMARIES
MixCal
™
521 series - sweat union connections
Adjustable thermostatic and pressure balanced mixing valve, certified by ICC-ES to ASSE 1017-2009 and CSA B125.3, approved for point of distribution
domestic water systems and radiant hydronic heating systems. Sweat connections ½", ¾" or 1" with union tailpieces. Low-lead brass body (<0.25%
Lead content) certified by ICC-ES file 1360. Meets requirements of NSF/ANSI 372-2011. Shutter, regulating seats and sliding surfaces in anti-scale
plastic, PPO. Seals peroxide-cured EPDM. Stainless steel spring. Maximum working temperature 200 degrees F (93 degrees C). Setting range 85
degrees F to 150 degrees F (30 degrees C to 65 degrees C). Maximum working pressure 200 psi (14 bar). Maximum operating differential pressure 75 psi
(5 bar). Tolerance ±3 degrees F (±2 degrees C). Flow rating: Cv 3.0. Minimum flow to ensure optimal performance: 1.0 gpm (3.8 L/min)
. Minimum flow rate
when recirculation flow rate is 1 gpm or greater: 0 gpm.
Provided with tamper-proof setting lock. Provide with optional inlet port check valves. Provide with
optional mixed outlet temperature gauge, 30 to 210 degrees F scale, 2 inch diameter for 1/2", 3/4" and 1" models.
MIX
3
2
4
SUPPLY
HOTCOLD
MI X
BOILER
SUPPLY
MIX
3
2
4
MIX
3
2
4
Safety r elief valve
Check valve
Isolation valve
Expansion vessel
Filter
Pump
*
*
*
*
WA TER
HEA TER
WA TER
HEA TER
C
A
LE
F
F
I
CA
L
E
FF
I
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
MIX
3
2
4
SUPPLY
HOTCOLD
MI X
BOILER
SUPPLY
MIX
3
2
4
MIX
3
2
4
Safety r elief valve
Check valve
Isolation valve
Expansion vessel
Filter
Pump
*
*
*
*
WA TER
HEA TER
WA TER
HEA TER
C
A
LE
F
F
I
CA
L
E
FF
I
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
MIX
3
2
4
SUPPLY
HOTCOLD
MI X
BOILER
SUPPLY
MIX
3
2
4
MIX
3
2
4
Safety r elief valve
Check valve
Isolation valve
Expansion vessel
Filter
Pump
*
*
*
*
WA TER
HEA TER
WA TER
HEA TER
C
A
LE
F
F
I
CA
L
E
FF
I
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
CALEFFI
CALEFFI
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
10
0
8
6
4
2
Keys to symbols
Radiant heating system
Domestic hot water system without recirculation
Application diagrams
*MixCal
™
521 series thermostatic mixing valves with inlet check valves, “AC” models, can be
used instead of separately installed check valves.