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)

3.3.2 Joint materials. Silver brazing alloy or phosphorous copper brazing alloy shall be used for joints

subjected to the temperature of live steam.

3.3.3 Dissimilar metals. Associated materials shall be compatible under intended service conditions.

3.3.4 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally

preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the

operational and maintenance requirements, and promotes economically advantageous life cycle costs.

3.4 Design.

3.4.1 Removable parts. The temperature-regulating valve shall be designed so all interior parts of the valve can

be removed for servicing without removing the valve body from the line, which includes replacement of the

thermostat.

3.4.2 Shock. The temperature-regulating valve shall be designed such that it is capable of passing the

high-impact (H.I.) shock test in accordance with MIL-S-901 for Grade A, Type A, Class I equipment.

3.4.3 Dimensions and tolerances. The physical dimensions and tolerances of the temperature-regulating valve

shall conform to figure 1 for the models and sizes specified in table I and table II, as specified (see 6.2).