Armstrong Rada 425 Handbuch für Installation und Wartung - Seite 3
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Water Temperature Control - Groups of Fixtures
Thermostatic
Rada 320D
A derivative assembly of the standard Rada 320 Thermostatic
Mixing Valve of "sealed for life" disposable cartridge construction.
Compact design with top and/or bottom blended water outlet
makes Rada 320D ideal for recessed enclosure, plumbing chase
and utility/mechanical room installation.
Complete operating mechanism of valve is enclosed in durable
polymer cartridge for ease of field maintenance. Powerful
internal mechanism and non metallic wetted parts resist mineral
deposition.
Capable of close temperature control at diverse flow rates
between 1 gpm (3.8 lpm) and 24 gpm (91 lpm). Able to blend
within 5°F (2°C) of either inlet supply due to "low seepage" across
internal proportioning mechanism.
Operational Specifications
• Dual thermostatic elements provide redundancy in the
event of individual thermostat failure
• Typical outlet temperature control +/-2°F
• Adjustable maximum temperature limit stop
• Adjustable single temperature lockout
• Thermal shutdown mode upon inlet supply failure
Technical Specifications
• 3/4" NPT inlets and 3/4" NPT outlet
• Chrome-plated DZR brass/polymer construction with
self-finish brass and bronze components (320D) or
with nickel-plated components (320DC)
• Operating pressures
Maximum: 150 psi (10 bar)
Minimum: 10 psi (.7 bar)
• Integral combination inlet check stop/union/strainers
• Outlet thermometer and outlet flow control valve
• ASSE 1017 and CSA B125 certified
• Shipping weight 10 lbs (4.5 kg)
For a submittal drawing, refer to CDLW #1102.
Rada Thermostatic Mixing Valves (gpm)
Model
5
320
8
425
15
40
36
50
49
10
15
20
11
13
15
22
27
31
51
62
72
70
85
98
11-7/16"
(291 mm)
Pressure Drop (psi)
25
30
35
17
19
20
35
38
41
-
-
-
-
-
-
3
Rada 320
9-1/8"
(232 mm)
40
45
50
22
23
24
44
46
49
-
-
-
-
-
-
7-3/8"
(187 mm)
Min.
C
Flow
V
1
3.4
2
6.9
2
16.0
2
22.0