This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, transportation and packaging of air duct dampers. This standard applies to air duct dampers in various types of ship ventilation systems. This standard does not apply to insulated spiral air duct dampers. CB/T 3726-1995 Air duct dampers CB/T3726-1995 Standard download decompression password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB/T 3726--1995
Air Duct Damper
Published on 1995-12-19
Published by China State Shipbuilding Corporation
Implemented on 1996-08-01
Shipbuilding Industry Standard of the People's Republic of China
Subject Content and Scope of Application
CB/T3726--1995
Classification Number: U54
Replacement: CB463--66
CB668-68
CB*458—85
CB542--80
This standard specifies the product classification, technical requirements, inspection rules and markings of air duct dampers (hereinafter referred to as dampers). This standard is applicable to air duct dampers in ventilation systems of various types of ships. This standard does not apply to insulated spiral duct dampers. 2 Reference standards
GB3029 Marine ventilation accessories
Technical conditions
CB"/Z54 electrolytic galvanizing
3 Product classification
The types of dampers are as shown in Table 1.
Circular ordinary damper
Circular sealed damper
Circular simple damper
Rectangular simple damper
Rectangular handle damper
Rectangular pull ring damper
Rectangular hinge damper
China State Shipbuilding Corporation 1995-12-19 Approved Nominal diameter DN
80~400
80~700
Installation position
Used in the middle of circular ventilation ducts
Used for circular ventilation pipes with sealing requirements|| tt||Middle part of air duct
Used in the middle part of circular ventilation duct
Used in the middle part of rectangular ventilation duct
Used in the middle part of rectangular ventilation duct
And outlet end (used for removing
flange net in the middle part of the duct)
Used in the outlet end of rectangular ventilation duct
1996-08-01 implementation
CB/T3726-1995
3.2The structural type and main dimensions of type A damper shall be in accordance with Figure 1 and Table 2. DN
1—body; 2—damper plate; 3-stuffing box; 4-handleTable 2
Nominal diameter of air duct
Main dimensions of damper
Number of bolt holes
n(pieces)
CB/T3726—1995||tt| |3.3The structural type and main dimensions of the B-type air damper are as shown in Figure 2 and Table 3. D
Nominal diameter of air duct
1—body; 2 air damper; 3—shaft; 4 cup-shaped sleeve; 5—handle; 6—stuffing box Table 3
Main dimensions of air damper
Number of bolt holes
n(pieces)
CB/T3726-1995
3.4C-type The structural type and main dimensions of the damper shall be in accordance with Figure 3 and Table 4. Figure 3
1 Main body, 2 Air regulating plate; 3-Shaft; 4-Handle Table 4
Nominal diameter of air duct
Main dimensions of damper
CB/T3726-1995
3.5The structural type and main dimensions of D-type damper shall be in accordance with Figure 4 and Table 5.2.5
1 Main body; 2-Air regulating plate; 3—axis; 4—handle Table 5
Nominal diameter
Nominal size
Main dimensions of air damper
Nominal diameter
Nominal size
CB/T3726-1995
Continued Table 5
Main dimensions of air damper
CB/T3726--1995
3.6 Structure of E air damper The configuration and main dimensions are as shown in Figure 5 and Table 6. Figure 5
1—main body; 2—air regulating plate; 3—shaft; 4—handleTable 6
Nominal size
Flange size
115×145bZxz.net
115×195
135×175
115×275
135×215
155×18 5
135×305
155×255
175×205
135×405
155×305
175×265
155X405
175×335
206 ||65×95
65×14 5
85×125
65×225
85×165
105×135
85×255
105×205
85×355
105×255
12 5×215
105X355|| tt||125×285
156X×226
Main dimensions of air damper
Screw hole distance
Number of bolt holes n (pcs)
Short side 1
Nominal dimensions
Flange dimensions
175×525
206×406
246×336
206×5 86
246 × 446 ||tt | tt||350×640
410 ×540 | tt||196×556
247 × 427 | | tt | | 300 × 370 | | tt | | 196 × 766 | | tt | | 247 × 557 | | tt | | 300 × 470 | | tt | 740
360×610||tt ||350X1160
300×1110
410×940
480X770
410×1300
360×890
430X720
360×1250
480×1050||tt ||430×1000
56 0×870
510×820
CB/T3726—1995
Continued Table 6
Main dimensions of air damper
Screw hole distance
Number of bolt holes n (pieces)
Total of long sides
CB/T3726-1995
The structural type and main dimensions of F-type air damper are as shown in Figure 6 and Table 7. 3.7
1 body; 2 air regulating plate; 3 shaft; 4 connecting plate; 5 pull ring gauge 7
Nominal size
Flange size
115×145
115×195
135×175
115×275
135×215
155×185
135×305
1 55 × 255 | | tt | | 175 × 205 | | tt | | 135 × 405 | | tt | |105×135
85×255
105×205
125×155
85×355
105×255
125×215
Main dimensions of air damper
Screw hole distance
Number of bolt holes n
Full length
Nominal dimensions
Flange dimensions
155X405
175×355|| tt||206 × 276 | 350×420
246×816
29 7 × 607 | | tt | | 350 × 520 | | tt |
156×226
125×475
156×356
196×286
156×536
196×396
247X307
196×556
247X427
300×370
196×766
247×557
300×470
247 × 737 | | tt | | 300 × 590 | | tt | | 360X490 | | tt | 0×770
410X1.300
4 80×1050
560X870
360×890
430×720
360×1250
430×1000
510×820
CB/T3726--1995
Continued Table 7
Main dimensions of air damper
Screw hole distance
Number of bolt holes n
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