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MX SERIES VALVES
SIZE
H
C
A
C
Fig. 1. Dimensions of Union NPT model.
Product
Number
Size NPT
MX127LF
1 in.
MX128LF
1-1/4 in.
MX129LF
1-1/2 in.
MX130LF
2 in.
MX 050-RP Recirculation Adapter Kit
* Union models include 1/2-in. recirculation adapter.
** Flange models recirculation adapter size (MX131LF 1 in. and
MX132LF 1-1/4 in.)
Maximum Temperature:
MX127LF, 128LF, 129LF, 130LF, 131LF, 132LF: 221° F (105° C)
Service
To remove dirt, flush valve. To remove calcium and lime
deposits, soak valve in vinegar for 24 hours and flush or
contact factory for assistance. Do not attempt to field repair
this calibrated valve.
Temperature Selection
The MX Series Valves are made in ranges: 113°-149° F (45°-
65° C). The factory setting is 130° F (54° C). Change
temperature setting with an Allen wrench, which is included;
3/16 for MX127LF or a 5/16 for MX128LF, MX129LF and
MX130LF. Punch through the center of the temperature range
label. By turning the screw clockwise, the mix temperature
increases (counterclockwise, it decreases). Each complete
turn with the Allen wrench changes the temperature as
follows: MX127LF (1 in.); 11° F (6° C), MX128LF (1-1/4 in.),
MX129LF (1-1/2 in.) and MX130LF (2 in.), 7° F (4° C). Do not
operate valve at temperatures outside of its calibrated range
of 113°-149° F (45°-65°). Use a thermometer to verify
temperature.
38-00033EFS—03
SIZE
D MINIMUM
M
A
MX127LF-130LF
SIZE
B
Table 1. MX Series Valve Models.
Min. Flow
GPM @
C
(GPM)
30 psi Temp. Range
v
4.0
1.0
22
9.3
2.5
50
13.5
3.5
75
18.0
5.0
100
M23693A
Weight in
Lbs (kg)
113°-149° F
3.6 (1.6)
(45°-65° C)
6.4 (2.9)
8.4 (3.8)
13.1 (5.9)
0.2 (0.1)
Maximum working Pressure 150 psi (1034 kPa).
Minimum temperature difference between hot and mix
should be 10° F (6° C).
2
Dimensions in inches (mm)
A
B
2.8 (66)
3.7 (94)
6.5 (165)
3.3 (84)
4.4 (112)
7.7 (196)
3.6 (91)
5.0 (127)
8.6 (218)
4.2 (107)
5.8 (147)
10.0 (254)
130
113
149
˚F
54
45
65
˚C
M36225
Fig. 2. Temperature range label.
C
D
6.0 (152)
6.9 (175)
7.0 (178)
7.3 (185)
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