Brochure
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TWO-STAGE HIGH LOW MIXING VALVE
Adjustable thermostatic two-stage high low mixing valve for point of
distribution in domestic water systems.
Low-lead brass valve bodies.
Locking set point knobs on thermostatic mixing valves.
Check valves on thermostatic mixing valve cold inlets.
Locking set point knob on pressure reducing valve.
Copper connecting tubing, all sweat construction.
Double union connection on all valves for ease of service.
Removable ½" NPT threaded outlet thermometer.
Pre-mounted to strut for easy mounting.
Max. working pressure: 200 psi.
Max. inlet temperature: 180ºF.
Adjustable range: 95—150ºF.
Flow range: 1 to 50 gpm.
Thermostatic mixing valves meet requirements of ANSI/NSF 372-2011 and
certifi ed to ASSE 1017, CSA B125.3, UPC, IPC, Low Lead Laws and listed
by ICC-ES for use in accordance with the U.S. and Canadian plumbing
codes. Pressure reducing valve is certifi ed to ASSE 1003, CSA B356,
NSF61, NSF 372 Low Lead Laws and listed by ICC-ES. Meets codes IPC,
IRC & UPC for use in accordance with the U.S. and Canadian plumbing
codes.
NA523
DELTA
2
™
tech. broch. 01092
Code Description Lbs USD
NA52367HL 1" inlets, 1¼" outlet, copper 25
4,200.00
NEW
NEW
The NA523 two-stage high low mixing valve system delivers tempered
water for a wide range of flows in a single assembly, applicable for
intuitional and commercial applications such as hotels, nursing homes,
hospitals, schools, and so on.
The NA523 is furnished assembled and pressure tested with large and
small thermostatic mixing valves; codes 521509A and 523178A, along
with a pressure reducing valve code 535970HA, to function as one
system in providing a broad flow range from 1 gpm to 50 gpm. This
one-piece assembly also contains an outlet thermometer, cold water
inlet check valves, and shut-off ball valves.
The mixing valves are piped in parallel to the hot and cold inlet lines and
the pressure reducing valve is piped on the outlet (mixed temperature)
side of the larger thermostatic mixing valve. When demand is low, the
small thermostatic mixing valve provides the needed water flow. When
demand increases, indicated by increasing Delta P (differential pressure)
in the system, the pressure reducing valve sees this fall off pressure and
opens to allow flow through the larger thermostatic mixing valve.
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MIXED
41”
18”
10”
COLD HOT
*Depth from wall including mounting channel is 5¼".