Brochure

Components for today’s modern hydronic systems
MixCal
TM
520 SERIES
THERMOSTATIC MIXING VALVE
PRODUCT FEATURES
Stable mixed temperature performance with durable construction for long life
Due to the unique mixing chamber design, Caleffi MixCal™ produces very stable mixed water
temperature as inlet temperatures and pressures vary. Scale formation is minimized via sliding surfaces
constructed of an anti-scale polymer, thus guarding against seizing 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.
Protecting the system to protect your water
521 SERIES
 Large mixing chamber and
thermostatic cartridge:
Enables precise mixed temperature stability
during inlet temperature and pressure
variations.
Installation exibility:
½” - 1” sweat, NPT, Press and PEX barb union
connections. Check valves and temperature
gauge optional.
Anti-scale polymer materials:
Inhibits scaling on internal sliding surfaces,
assuring stable temperature control and
long life.
Tamper-proof adjustment setting lock:
Prevents tampering of the mixed water
temperature setpoint.
Peroxide-cured seals:
Stands up to treated water, chlorine or
chloramines.
Precisely manufactured:
Finely machined threads and double o-rings
for smooth knob adjustment.