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MIL-DTL-3155 Valve, Temperature-Regulating Ventilation Heater, Steam Control, Naval Shipboard UseThis specification covers thermostatic-controlled steam valves for temperature regulation of shipboard ventilation heaters. These valves are of the self-operated type, requiring no separate power source such as electricity or compressed air.

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MIL-DTL-3155D(SH)
TABLE I. Models E and G valve sizes and capacities.
Capacity in pounds steam per
Nominal
Model and size
hour
pipe size
number
(I.P.S)
Minimum
Maximum
E-½
½
5
6.5
E-1
½
10
13
E-2
½
15
19
E-3
½
22
27.5
E-4
¾
30
37.5
E-5
¾
40
50
E-6
¾
60
75
E-7
1¼
90
112.5
E-8
1¼
120
144
E-9
1½
160
192
E-10
1½
200
240
E-11
1½
260
312
E-12
1½
325
390
G-32
1½
450
495
G-33
1½
600
660
G-34
1½
900
990
TABLE II. Model D valve sizes and capacities.
Capacity in pounds steam per hour
Model and size
Nominal pipe
Type W ­thermo
Type L or R ­thermo
number
size (I.P.S)
Minimum
Maximum
Minimum
Maximum
D-21
¾
10
15
30
37.5
D-22
¾
15
19
40
50
D-23
¾
22
27.5
60
75
D-24
1
30
37.5
90
112.5
D-25
1
40
50
120
144
D-26
1¼
60
75
160
192
D-27
1¼
90
112.5
200
240
D-28
1½
90
112.5
260
312
D-29
1½
120
144
325
390
3.4.4 Pressure capacity. Capacity of each model and size valve, based on a 35-pound per square inch gage
(psig) inlet pressure and a 25-psig outlet pressure with the valve fully open, shall be in accordance with table I and
table II, as specified (see 6.2).
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