325
E. 10th St. Halstead KS. 67056325
E. 10th St. Halstead KS. 67056
800-835-1003 Fax 316-835-3218
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VIPER CARCASS SPECS VIPER LOAD SUPPORT VIPER TROUGHABILITY
VIPER II CARCASS SPECS VIPER II LOAD SUPPORT VIPER II TROUGHABILITY
WHAT IS A STRAIGHT WARP CARCASS?
There are as many types of conveyor belting, as there are products being conveyed. Most products being conveyed, are relatively light and non abusive. Sand, gravel, grain, wood chips, each has characteristics that demand the superior quality of one of Legg Company’s multi-ply conventional weave carcass’, but then there’s the really tough stuff!! Eight inch minus rock, reclaimed scrap iron, trenching discharge, chopped up car bodies, these aren’t your basic move the pile type conveying applications!
In addition to Legg Company’s wide range of conventional multi-ply carcass, Legg Company offers the VIPER and VIPER II straight warp single and two ply carcass when you must stop that ripping and tearing that the really tuff applications cause. The straight warp and fill yarns, woven securely in place by a binder yarn, resist ripping and tearing.
Since you have to pack tremendous break strength into the one or two plies of the VIPER or VIPER II, you must use very large yarns. This large yarn size is much more resistant to ripping, tearing, and puncturing than the smaller yarns of a lighter fabric belt with 4, 5, or more plies.
In addition to the larger yarn size, the weave style of the VIPER and VIPER II gives it superior tear and puncture resistance. The forces exerted on the belt are contained in straight yarns traveling in the warp and fill directions. These yarns are bound together by a binder yarn. The binder yarn system helps distribute the impact forces of loading by allowing the warp and fill yarns to move to absorb the shock. Once the belt has been vulcanized with rubber covers and or skims, the rubber further dampens these forces and will absorb some of the stresses put on the belt by punctures which will reduce the likelihood of the belt tearing.
The graphic above shows a traditional plain weave belt carcass, and the carcass of the VIPER. In comparing the two some key differences should be noted. The yarns in the multi-ply fabric have a crimp. The crimp is the deflection of a yarn from being passed over and under other yarns. As the traditional belt carcass travels around pulleys, the crimp expands and contracts, causing friction between the two yarns which reduces belt life. The straight yarns of the Viper and Viper II do not produce this abrading effect.
Under tension the crimp will pull out of a conventional plain woven fabric causing stretch. The Viper and Viper II weave does not have crimp, thus eliminating some of the initial stretch in the belt.
The heavy fill, or cross yarns of the Viper and Viper II provide for maximum load support. This makes them a great choice for wide conveyors and or conveyors with greater distances between the center idler and troughing idlers.
The Viper and Viper II carcass has a polyester warp yarn for excellent strength with minimum stretch. Also, polyester has excellent chemical and heat resistance. Additionally the stability of the polyester makes for superior tracking with minimal belt training. The nylon fill yarns of the Viper and Viper II carcass provides for excellent mechanical fastener retention, excellent troughability, and superior rip resistance. For special applications, a special order carcass of Poly/Poly or Nylon/Nylon is available.
Carcass
Specifications
VIPER
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|
Carcass Type |
Number of Plies |
Allowable Working Tension Conveyor |
Allowable Working Tension Elevator |
Carcass Gauge |
CONVEYOR |
ELEVATOR |
Maximum Elevator Heavy (Ind) Light (grain) |
|
V/220 |
1 |
220 190 |
170 150 |
.110 |
16 14 |
16 14 |
7 9 |
|
V/330 |
1 |
330 300 |
280 250 |
.125 |
20 18 |
20 18 |
8 9 |
|
V/440 |
1 |
440 400 |
375 335 |
.150 |
24 20 |
24 20 |
9 10 |
|
V/550 |
1 |
550 500 |
440 400 |
.175 |
26 20 |
26 20 |
10 12 |
RECOMMENDED LOAD SUPPORT
VIPER
|
#/ft.3 |
#/ft.3 |
#/ft.3 |
#/ft.3 |
#/ft.3 |
|
|
Material Wt. |
0-40 |
41-80 |
81-120 |
121-180 |
181-240 |
|
Maximum Belt Width In Inches |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
|
V/220 |
54 48 42 |
42 36 30 |
36 30 24 |
24 20 18 |
NR NR NR |
|
V/330 |
72 66 60 |
66 54 42 |
60 48 42 |
48 42 36 |
30 24 18 |
|
V/440 |
72 72 60 |
72 60 48 |
60 54 48 |
54 48 42 |
36 30 24 |
|
V/550 |
72 72 66 |
72 66 54 |
66 60 54 |
60 54 48 |
42 36 30 |
|
IDLERS |
V/220 |
V/330 |
V/440 |
V/550 |
|
20O |
14" |
18" |
20" |
24" |
|
35O |
18" |
24" |
24" |
30" |
|
45O |
20" |
24" |
30" |
36" |
Carcass
Specifications
VIPER II
|
Carcass Type |
Number of Plies |
Allowable Working Tension Conveyor lbs/P.I.W. Vulcanized Mechanical |
Allowable Working Tension Elevator lbs/P.I.W. Vulcanized Mechanical |
Carcass Gauge BB x BB inches |
CONVEYOR Minimum Pulley Diameters (inches) % of A.W.T. >= 80% >=60% |
ELEVATOR Minimum Pulley Diameters (inches) % of A.W.T. >= 80% >=60% |
Maximum Elevator Bucket Projection (inches)
Heavy (Ind) Light (grain) |
|
VII/400 |
2 |
400 360 |
330 300 |
.275 |
30 24 |
30 24 |
10 12 |
|
VII/600 |
2 |
600 550 |
500 450 |
.325 |
30 24 |
30 24 |
12 14 |
|
VII/800 |
2 |
800 725 |
690 620 |
.375 |
36 30 |
36 30 |
15 16 |
| VII/1000 |
2 |
1000 900 |
865 775 |
.430 | 42 36 | 42 36 | 18 20 |
| VII/1250 | 2 | 1250 1125 | 1075 965 | .485 | 48 42 | 48 42 | 20 22 |
| VII/1500 | 2 | 1500 1350 | 1300 1170 | .545 | 54 48 | 54 48 | 24 22 |
|
#/ft.3 |
#/ft.3 |
#/ft.3 |
#/ft.3 |
#/ft.3 |
|
|
Material Wt. |
0-40 |
41-80 |
81-120 |
121-180 |
181-240 |
|
Maximum Belt Width In Inches |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
20o 35o 45o |
|
VII/400 |
72 72 72 |
72 72 72 |
66 60 54 |
60 54 48 |
48 42 36 |
|
VII/600 |
72 72 72 |
72 72 72 |
72 72 72 |
66 60 54 |
60 54 48 |
|
VII/800 |
72 72 72 |
72 72 72 |
72 72 72 |
72 72 66 |
66 60 54 |
| VII/1000 |
72 72 72 |
72 72 72 |
72 72 72 |
72 72 72 |
72 72 66 |
| VII/1250 |
72 72 72 |
72 72 72 |
72 72 72 |
72 72 72 |
72 72 72 |
| VII/1500 |