Henry_p64-98_ENG_3 26/06/2013 12:12 Page 95
The primary function of a Moisture Indicator is to provide a visual indication of system moisture levels. However, the unit can also be used as a liquid refrigerant or oil return indicator.
“Dri-Vue” Henry Technologies moisture indicators are approved for use with specific HCFC and HFC refrigerants, along with their associated oils.
• Patented Henry Technologies Design #
•Large sight glass – easy view
•Positive colour contrast indicator paper
•Replaceable indicator seal cap
•In-built filter screen protects indicator paper
•Plastic protection cap supplied as standard
•SAE Flare or solder connections
# US patent 5852937
Allowable operating pressure = 0 to 34.5 barg
Allowable operating temperature = -10 o C to +93 o C
The main body is made from brass. The seal cap comprises a fused sight glass in a plated carbon steel housing. The seal cap is screwed to the main body and sealed with a PTFE gasket.
The indicator colour versus moisture content, PPM, is presented in the table for different refrigerants. The moisture content level varies with operating fluid temperature.
The colour is an indicator of the dryness of the refrigerant:-
Colour indicators: Dry = Green, Caution = Chartreuse, Wet = Yellow.
1. For solder connection moisture indicators, the seal cap assembly should be removed prior to brazing.
2. If the indicator paper becomes discoloured or damaged, the seal cap should be replaced. Replacement seal cap part number is MI-3.
Type
MI-30-F
MI-30-S
Part No
MI-30-1/4F
MI-30-3/8F
MI-30-1/2F
MI-30-1/4S
MI-30-3/8S
MI-30-1/2S
MI-30-5/8S
MI-30-7/8S
MI-30-1 1/8S
Refrigerant type
R404A
R22
M I - 3 0 - F S E R I E S
M I - 3 0 - S S E R I E S
Conn Size (inch)
1/4 SAE Flare male x female
3/8 SAE Flare male x female
1/2 SAE Flare male x female
1/4 ODS
3/8 ODS
1/2 ODS
5/8 ODS
7/8 ODS
1 1/8 ODS
38
38
43
49
54
A
38
43
42
38
67
67
75
95
84
71
80
67
Dimensions (mm)
B
67
C
9
12
10
9
9
9
12
13
16
‘ D R I -V U E ’ M O I S T U R E - C O L O U R TA B L E
Temp (°C)
24
38
52
24
38
52
Green below 15 below 25 below 30 below 30 below 45 below 60
Moisture content (parts per million)
Indicator colour
Chartreuse
15-90
25-115
30-140
30-120
45-180
60-240
8
10
13
19
23
D
N/A
N/A
N/A
8
Weight (kg)
0.20
0.26
0.27
0.20
0.19
0.18
0.22
0.33
0.29
CE Cat
SEP
SEP
SEP
SEP
SEP
SEP
SEP
SEP
SEP
Yellow
Above 90
Above 115
Above 140
Above 120
Above 180
Above 240
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