Large Bore Valve Extensions

Standard Bore Valve Extension: Rigid

Standard Bore Valve Extension: Rigid|Duncan Engineering LTD

Used to facilitate air service where wheel, rim brake and other mounting conditions prevent ready access to the
valve. They extend the valve mouth to the desired position for inflating, gauging and deflating operations.

Duncan Part No:

Bend Angle

Effective Length “L”

mm

(inches)

5020-24

90

152.4

6

5020-30

90

190.5

7.5

5020-32

90

203.2

8

5020-48

90

304.8

12

 

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Large Bore Valve Extension: Semi Flexible

Large Bore Valve Extension: Semi Flexible|Duncan Engineering LTD
 
Duncan Part No.
 
Effective Length
(mm)
(inches)
4461 DY
 
114.30
 
(4.50”)
 
4661 F
 
152.4
 
(6.00”)
 
4661 H
 
203.2
 
(8.00”)
 
4661J
4661AB
 
228.6
304.8
 
(9.00”)
(12.00”)
 
4661AJ
 
482.6
 
(19.00”)
 
4661BD
 
609.6
 
(24.00”)
 
4661BDX
 
615.95
 
(2425”)
 
 
Rigidly built, these extensions meet wheel conditions where a light
weight, rigid, yet hand-bendable-to—shape type as desired.
* Standard Accessories: 1149T valve core, 1450/4659 cap, 4590-5
lock nut and 725-2 hex nut (2 nos.)

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Large Bore Valve Extension: Flexible

Large Bore Valve Extension: Flexible|Duncan Engineering LTD
 
Duncan Part No.
 
 
Effective Length
“L”(mm)
 
4461-HA8
 
200
4661-HA14
 
350
4661-HA18
 
460
4661-HA20
 
560
4661-HA23
 
590
4661-HA236
 
600
4661-HA33
 
830
4661-HA39
 
780
 

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Large Bore Valve Extension: Rigid

 Large Bore Valve Extension: Rigid|Duncan Engineering LTD
 
Duncan Part No.
Effective Length
Total Lenght
(mm)
(inches)
(mm)
(inches)
3906
31.75
1.25
50.8
2.00 M
3933
101.6
4.00
120.65
4.75 m
3959
114.3
4.50
133.35
5.25
3995
141.275
5.562
166.675
6.562 These extensions are used for
3993
184'15
7'25
2032
8'00 applications where extensions can
3860
273'05
10'75
292'
1“'50 be mounted in a straight line with the
3902
571.5
22.50
590.55
23.25 valve. Full length plunger pm
3967
615.95
24.25
635
25.00 actuates core in existing-

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Thermo-Plasitc Hose Assembly

Thermo-Plasitc Hose Assembly|Duncan Engineering LTD
 
Duncan Part No:
Effective Length
(mm)
(inches)
NDHOSE-4
101.6
4
NDHOSE-6
152.4
6
NDHOSE-12
304.8
12
NDHOSE-16
406.4
16
NDHOSE-18
457.2
18
NDHOSE-41
1041.4
41
 
 
 
These hoses are subjected to extreme terrains mainly in the mining sectors and exposed to high temperatures and
used to inflate OTR tyres to the required pressure. The hose and the and fittings are crimped perfectly, suitable to
with stand pressure up to 15kg/cm2.
These hoses are generally fitted on and used for inflating OTR tyres mounted on 120 tons-170 tons capacity
dumpers.

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