1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 4820 INCH-POUND MIL-DTL-3155D(SH) 10 September 2013 SUPERSEDING MIL-V-3155C(SHIPS) 19 August 1964 DETAIL SPECIFICATION VALVE, TEMPERATURE-RE
3、GULATING VENTILATION HEATER, STEAM CONTROL, NAVAL SHIPBOARD USE This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers thermo
4、static-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. 1.2 Classification. Temperature-regulating valves with thermostat types are of the followi
5、ng models, as specified (see 6.2): a. Model G or Model E with one of the following thermostats: (1) Weather (Type W) (2) Duct (Type L) (3) Room (Type R) b. Model D with one of the following combinations of thermostats: (1) Type W and Type L (2) Type W and Type R 2. APPLICABLE DOCUMENTS 2.1 General.
6、The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness
7、 of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(
8、SH) 2 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contrac
9、t. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-S-901 - Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements for MIL-F-1183 - Fittings, Pipe, Cast Bronze, Silver-Brazing, General Specification for (Copies of these documents are available online at http:/quicksearch.d
10、la.mil/ or https:/assist.dla.mil.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INSTITUTE (A
11、NSI) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies of this document are available from the American National Standards Institute, 25 W. 43rd Street, 4th Floor, New York, NY 10036 or online at http:/webstore.ansi.org/.) ASTM INTERNATIONAL ASTM A276 - Standard Spe
12、cification for Stainless Steel Bars and Shapes ASTM B61 - Standard Specification for Steam or Valve Bronze Castings ASTM B584 - Standard Specification for Copper Alloy Sand Castings for General Applications (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O. B
13、ox C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this d
14、ocument, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The temperature-regulating valves furnished under this specification shall be products that are authorized by the qualifying activity for listing on the appl
15、icable qualified products list before contract award (see 4.2 and 6.2). 3.2 Description. 3.2.1 Temperature-regulating valve. The temperature-regulating valve shall consist of the basic valve body model, valve seat(s) and valve poppet(s), and the thermostat type(s) necessary to accomplish the designa
16、ted function. 3.2.2 Thermostat. A thermostat shall consist of steam actuated bellows, union nut, armored capillary tubing, and bulb. 3.3 Materials. 3.3.1 Temperature-regulating valve materials. Materials used in the temperature-regulating valve shall be high-grade, free from defects, and suitable fo
17、r the purpose intended. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 3 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 Dis
18、similar 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
19、 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 fro
20、m 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 phy
21、sical 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). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 4 Mode
22、l and size number Dimensions in inches (maximum) Model and size number Dimensions in inches (maximum) A B C A E- 4 2 3 D-21 6 E-1 4 2 3 D-22 6 E-2 6 3 4 D-23 6 E-3 6 3 4 D-24 6 E-4 638 3 4 D-25 6 E-5 638 3 4 D-26 7 E-6 638 3 4 D-27 7 E-7 6116 3 4 D-28 7 E-8 6116 3 4 D-29 7 E-9 6 3 4 E-10 6 3 4 E-11
23、7 3 5 E-12 7 3 5 FIGURE 1. Valve dimensions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 5 TABLE I. Models E and G valve sizes and capacities. Model and size number Nominal pipe size (I.P.S) Capacity in pounds steam per hour Min
24、imum Maximum E- 5 6.5 E-1 10 13 E-2 15 19 E-3 22 27.5 E-4 30 37.5 E-5 40 50 E-6 60 75 E-7 1 90 112.5 E-8 1 120 144 E-9 1 160 192 E-10 1 200 240 E-11 1 260 312 E-12 1 325 390 G-32 1 450 495 G-33 1 600 660 G-34 1 900 990 TABLE II. Model D valve sizes and capacities. Model and size number Nominal pipe
25、size (I.P.S) Capacity in pounds steam per hour Type W thermo Type L or R thermo Minimum Maximum Minimum Maximum D-21 10 15 30 37.5 D-22 15 19 40 50 D-23 22 27.5 60 75 D-24 1 30 37.5 90 112.5 D-25 1 40 50 120 144 D-26 1 60 75 160 192 D-27 1 90 112.5 200 240 D-28 1 90 112.5 260 312 D-29 1 120 144 325
26、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). Provided by IHSNot for ResaleNo reprod
27、uction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 6 3.4.5 Valve operation. The valves, except Model D, shall be operative by any of the thermostats specified in 3.4.7. The Model D valve shall be operative by a combination of the Type W thermostat and the Type L or Type R
28、thermostat, as specified (see 6.2). 3.4.6 Valve unit. 3.4.6.1 Packless type valve. Valves shall be of the packless type. The use of stuffing boxes or packing glands on valve stems shall not be permitted. 3.4.6.2 Valve bodies material. Valves bodies shall be made of bronze conforming to ASTM B61 or c
29、opper alloy UNS No. C92200 of ASTM B584. Valves shall have union ends in accordance with MIL-F-1183 with pre-inserted rings. 3.4.6.3 Valve seats and poppets materials. Valve seats and poppets shall be of corrosion-resistant steel equal to that of Type 303 of ASTM A276 and shall be removable and repl
30、aceable. The poppets for Types R and L thermostats shall have an orifice having throttling characteristics. The throttling characteristics shall be such that greater increments of valve poppet movement are required per pound of steam near the closed position than are required near the open position.
31、 3.4.7 Thermostat. The steam flow of the valves shall be controlled by a bulb thermally responsive and connected to the steam operating bellows of the valve by a capillary tubing of the lengths specified in 3.4.9.1. 3.4.7.1 Interchangeability. The thermostat shall be connected to the basic valve bod
32、y by a ring nut and shall be interchangeable as specified in table III. TABLE III. Interchangeability of thermostats. Model of valves Sizes E through 1 E 2 through 7 E 8 through 12 D 21 through 24 D 25 through 29 G 32 through 34 3.4.7.2 Temperature shock. Each thermostat shall be subjected to an air
33、 temperature of not less than 180 F for not less than 72 continuous hours without detrimental effect to any part of the element. 3.4.7.3 Type W thermostat. The thermostat shall be non-adjustable and shall be set at the factory to be fully open in a 35 F ambient temperature. 3.4.7.4 Types L and R the
34、rmostat. The thermostats shall be provided with a dial adjustment graduated in degrees Fahrenheit. Means shall be provided for locking the dial at any set point within the operating range specified in table IV. TABLE IV. Thermostat ranges. Type Range F L 40 to 100 R 60 to 80 Provided by IHSNot for R
35、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 7 3.4.7.4.1 Throttling range. A 1 F change in either direction of the thermostat set point of the ambient air temperature shall be sufficient to start the valve poppet through its operating stroke and the ope
36、rating stroke shall be sufficient to ensure complete throttling or modulating operation. The throttling range between fully open and fully closed shall not exceed 6 F. 3.4.7.4.2 Thermostat tolerance. The thermostats shall be capable of operating the valve controlled from fully open to fully closed w
37、ith a change in air temperature at the thermostat bulb of not more than 3 F from the thermostat set point. 3.4.8 Bellows. Bellows shall be of the seamless type. The operating bellows of the steam valve shall be made of nickel-copper or of phosphor-bronze and shall be protected from direct steam impi
38、ngement by a shield. 3.4.9 Capillary tubing. The capillary tubing shall be covered throughout the entire length with an armor to provide physical protection. Armor shall be brass, bronze, or corrosion-resistant steel so constructed that the flexibility of the tubing will not be excessively reduced.
39、3.4.9.1 Capillary tubing length. The length of the capillary tubing between the bulb and operating bellows shall be 10 feet for Type L and Type W thermostats and 25 feet for Type R thermostat. 3.4.10 Bulbs. 3.4.10.1 Bulb materials and lengths. Thermostat bulbs shall be constructed of brass or copper
40、 and the bulb lengths shall not exceed the dimensions shown on figure 2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-8 FIGURE 2. Thermostat dimensions. MIL-DTL-3155D(SH)Provided by IHSNot for ResaleNo reproduction or networking permitted without
41、license from IHS-,-,-MIL-DTL-3155D(SH) 9 3.4.10.2 Bulb mounting. Bulbs shall have means for mounting similar to that shown on figure 2 and the mounting frame or flange shall be drilled for mounting fasteners. 3.5 Manually operable element. When specified (see 6.2), a manually operable control elemen
42、t capable of being inserted in the valve body instead of a thermostat shall be furnished. The element shall be capable of manually controlling the flow of steam from closed position to fully open, and shall have an index marking when practicable to show the relative position of the valve poppet with
43、 respect to its seat. 3.6 Bulkhead stuffing box. When specified (see 6.2), a bulkhead stuffing box for passing the capillary tubing through watertight bulkheads or decks shall be provided. The stuffing box shall be constructed of brass and shall be in accordance with figure 3. Provided by IHSNot for
44、 ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH)10FIGURE 3. Bulkhead stuffing box. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3155D(SH) 11 3.7 Onboard repair parts. When specified (see 6.2), o
45、nboard repair parts shall be furnished in accordance with table V. TABLE V. Onboard repair parts. Repair parts Quantity Total number of identical parts installed per ship 1-10 11-20 21-30 31-40 41-50 Over 50 Thermostats 1 2 3 4 5 6 Seats and poppets 1 3 5 7 9 11 Manual shut-off elements and operatin
46、g wrenches, if required 1 1 2 2 3 3 3.8 Identification and marking. 3.8.1 Identification plate. Each valve shall be provided with a metal identification plate, attached to an exposed position that normally will not be covered by insulation. The identification plate shall contain the following inform
47、ation: a. Item name (thermostat type) b. Valve size and number c. Federal stock number d. Component identification plate e. Manufacturers name f. Manufacturers address 3.8.2 Body marking. The valve size, manufacturers name, and the direction of flow indicated by an arrow or similar means shall be ca
48、st or otherwise permanently marked on the valve body. 3.9 Workmanship. Temperature-regulating valves shall be free from defects that affect their appearance or their operation. Castings shall be clean, sound, and free from blow holes, hard spots, porosity, cracks, and other injurious defects. They shall be smooth and well-cleaned, both inside and outside, and all fins and roughness shall be removed. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Qualifi
