KWS Manufacturing

Screw Conveyor Troughs

U-Troughs Flared Troughs Tubular Troughs Rectangular Troughs


KWS designs and manufactures many different types of troughs and tubular housings for every bulk material handling application. All troughs and tubular housings are available in carbon steel construction as well as abrasion-resistant steels, hot-dipped galvanized and stainless steel. KWS can manufacture troughs and tubular housings out of any commercially available metal. Plate end flanges are CNC cut and jig-welded to ensure exact alignment with adjacent trough sections. KWS recommends supporting every trough section with flanged feet or saddles.

Nomenclature

Troughs Nomenclature

U-Troughs

U-troughs are the most common type of trough for screw conveyors and screw feeders. The U–trough design is simple, economical and provides access for maintenance.

Angle Flange Troughs

Angle Flange

Angle flange troughs are manufactured with structural angle top flanges to provide extra rigidity. Stock angle flange troughs utilize thinner gauges of metal and are typically used in light and medium duty applications.

Formed Flange Troughs

Formed Flange

Formed flange troughs are manufactured with formed top flanges. Stock formed flange troughs utilize heavier gauges of steel and are typically used for medium to heavy duty applications. Formed flange troughs are dust-tight.

Double-Formed Flange Troughs

Double Formed Flange

Double formed flange troughs are manufactured with two formed top flanges for added rigidity. Double formed flange troughs provide an effective dust-tight seal when used with flanged covers and a compressible gasket material.

Formed Channel Troughs

Formed Channel

Formed channel troughs are manufactured with two formed side channels to provide rigidity for spanning long distances without intermediate supports. The lower, curved trough section is typically bolted to the channel sides and can be replaced when worn.

Drop Bottom Troughs

Drop Bottom

Drop bottom troughs are manufactured with a removable or hinged lower curved trough section. Drop bottom troughs allow access to the screw for clean out or maintenance purposes. Removable drop bottom troughs are bolted on close spacing on both sides of the trough. Hinged drop bottom troughs are hinged on one side with quick-release clamps and safety bolts on the other side.

Jacketed Troughs

Jacketed

Jacketed troughs are manufactured with an outer jacket that is seal-welded to the trough. Bulk materials can be cooled, heated or maintained at a constant temperature with jacketed troughs. Heat transfer mediums such as water, hot oil or steam flow through the jacketed trough to provide heat transfer. ASME coded troughs are available from KWS.

Flared Troughs

Flared Trough

Flared troughs are manufactured with formed top flanges. The top opening of a flared trough is wider than a U-trough to allow sticky or viscous bulk materials to enter the trough easier. Many mixing screw conveyors utilize flared troughs because the additional space above the screw creates more room for bulk materials to be mixed.

Tubular Housings

Tubular housings are typically used when a screw conveyor is inclined over 15-degrees. Conveying efficiency is greatly improved with tubular housings because bulk materials are contained and fall back is reduced. Tubular housings are also used for weather-tight applications and used to hold internal pressure in a screw conveyor. ASME coded tubular housings are available from KWS.

Tubular Housings Troughs

Non-Split

Non-split tubular housings are manufactured by rolling a cylindrical tube and continuously welding at the seam or cutting down spouting or pipe to length.

Split

Split tubular housings are manufactured by rolling two halves and forming flanges on each side. The two halves are then bolted together to form a rigid assembly.

Rectangular Troughs

Rectangular Troughs

Rectangular troughs are typically used in applications for conveying abrasive bulk materials. The space between the screw and rectangular trough fills with the bulk material being conveyed forming a static layer. The bulk material being conveyed slides over the static material and eliminates wear on the rectangular trough. Rectangular troughs are also beneficial when utilizing certain abrasion resistant steels such as AR-400, AR-500 and chromium carbide steel due to their low formability.

Angle Flange

Angle flange rectangular troughs are manufactured with structural angle top flanges to provide extra rigidity similar to U-troughs.

Formed Flange

Formed flange rectangular troughs are manufactured with formed angle top flanges similar to U-troughs.

Angle Flange – Top & Bottom

Angle flange – top & bottom rectangular troughs are manufactured with structural angles on both the top and bottom flanges. Some high strength steel plate materials such as AR-400 cannot be formed at 90-degree angles and angle flanges are required.

Formed Flange – Top & Bottom

Formed flange – top & bottom rectangular troughs are manufactured with formed angles on both the top and bottom flanges.

U-Troughs

U-Troughs
Screw
Dia.
Trough Thk. A B C D E F G Angle Flange Formed Flange Double Formed Flange
Part Number Wt. Per ft. (Lbs.) Part Number Wt. Per ft. (Lbs.) Part Number Wt. Per ft. (Lbs.)
4” 14 Ga .
12 Ga .
10 Ga .
5” 3-5/8” 1” 7-1/4” 1-1/4” 7/8” 7-1/2” TUA414*
TUA412
TUA410
7
9
12
TUF414
TUF412
TUF410
5
7
9
TUDF414
TUDF412
TUDF410
6
9
11
6” 14 Ga .
12 Ga .
10 Ga .
3/16”
1/4”
7” 4-1/2” 1-1/4” 9-3/4”
9-3/4”
9-3/4”
9-7/8”
10”
1-3/8” 7/8”
7/8”
7/8”
1-5/8”
1-3/4”
9-3/4” TUA614*
TUA612
TUA610
TUA6316
TUA6250
9
13
16
22
30
TUF614
TUF612
TUF610
TUF6316*
TUF6250
7
10
13
19
28
TUDF614
TUDF612
TUDF610
TUDF6316
TUDF6250
8
12
15
21
30
9” 14 Ga .
12 Ga .
10 Ga .
3/16”
1/4”
10” 6-1/8” 1-1/2” 13-1/4”
13-1/4”
13-1/4”
13-3/8”
13-1/2”
1-11/16” 7/8”
7/8”
7/8”
1-5/8”
1-3/4”
13-3/8” TUA914*
TUA912
TUA910*
TUA9316
TUA9250
12
16
21
27
39
TUF914
TUF912
TUF910
TUF9316*
TUF9250
10
13
17
22
34
TUDF914
TUDF912
TUDF910
TUDF9316
TUDF9250
11
15
20
26
38
12” 12 Ga .
10 Ga .
3/16”
1/4”
13” 7-3/4” 2” 17-1/4”
17-1/4”
17-3/8”
17-1/2”
2-1/8” 7/8”
7/8”
1-5/8”
1-3/4”
17-1/4” TUA1212*
TUA1210
TUA12316
TUA12250
21
27
35
46
TUF1212
TUF1210
TUF12316*
TUF12250
17
22
29
38
TUDF1212
TUDF1210
TUDF12316
TUDF12250
19
25
33
44
14” 12 Ga .
10 Ga .
3/16”
1/4”
15” 9-1/4” 2” 19-1/4”
19-1/4”
19-3/8”
19-1/2”
2-1/8” 7/8”
7/8”
1-5/8”
1-3/4”
19-1/4” TUA1412*
TUA1410
TUA14316
TUA14250
23
30
39
52
TUF1412
TUF1410
TUF14316*
TUF14250
19
25
33
44
TUDF1412
TUDF1410
TUDF14316
TUDF14250
21
28
37
50
16” 12 Ga .
10 Ga .
3/16”
1/4”
17” 10-5/8” 2” 21-1/4”
21-1/4”
21-3/8”
21-1/2”
2-1/8” 7/8”
7/8”
1-5/8”
1-3/4”
21-1/4” TUA1612*
TUA1610
TUA16316
TUA16250
26
33
43
57
TUF1612
TUF1610
TUF16316*
TUF16250
22
28
37
49
TUDF1612
TUDF1610
TUDF16316
TUDF16250
24
31
41
55
18” 10 Ga .
3/16”
1/4”
19” 12-1/8” 2-1/2” 24-1/4”
24-3/8”
24-1/2”
2-5/8” 7/8”
1-5/8”
1-3/4”
24-1/4” TUA1810*
TUA18316
TUA18250
38
50
65
TUF1810
TUF18316
TUF18250
32
42
55
TUDF1810
TUDF18316
TUDF18250
35
46
61
20” 3/16”
1/4”
21” 13-1/2” 2-1/2” 26-1/2”
26-1/2”
2-5/8” 1-5/8”
1-3/4”
26-1/4” TUA20316*
TUA20250
54
71
TUF20316
TUF20250
46
61
TUDF20316
TUDF20250
50
67
24” 3/16”
1/4”
25” 16-1/2” 2-1/2” 30-3/8”
30-1/2”
2-5/8” 1-5/8”
1-3/4”
30-1/4” TUA24316*
TUA24250
63
83
TUF24316
TUF24250
55
73
TUDF24316
TUDF24250
59
79
30” 3/8”
1/2”
31” 19-1/2” 3” 37-3/4”
38”
3-1/8” X 1-3/4” X 37-1/4” X TUA30375
TUA30500
148
198
TUF30375 X 134
X
TUDF30375 X 142
X
36” 3/8”
1/2”
37” 22-1/2” 3” 43-3/4”
44”
3-1/2” X 1-3/4” X 44” X TUA36375
TUA36500
170
227
TUF36375 X 156
X
TUDF36375 X 164
X

* KWS Stock Component (In Carbon Steel only)

U-Troughs
Screw
Dia.
Trough Thk. A B C D Formed Chanel Trough Drop Bottom Trough Jacketed Trough
Part Number Wt. Per ft.
(Lbs.)
Part Number Wt. Per ft.
(Lbs.) †
Part Number Wt. Per ft.
(Lbs.)•
4” NOT AVAILABLE
6” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
7” 4-1/2” 1-1/4” 9-3/4”
9-3/4”
9-3/4”
9-7/8”
10”
TUFC614
TUFC612
TUFC610
TUFC6316
TUFC6250
9
12
16
20
26
TUDB614
TUDB612
TUDB610
TUDB6316
TUDB6250
14
16
19
23
29
X X
9” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
10” 6-1/8” 1-1/2” 13-1/4”
13-1/4”
13-1/4”
13-3/8”
13-1/2”
TUFC914
TUFC912
TUFC910
TUFC9316
TUFC9250
12
16
20
26
30
TUDB914
TUDB912
TUDB910
TUDB9316
TUDB9250
18
22
27
33
39
TUF914J
TUF912J
TUF910J
TUF9316J
TUF9250J
19
25
33
43
62
12” 12 Ga.
10 Ga.
3/16”
1/4”
13” 7-3/4” 2” 17-1/4”
17-1/4”
17-3/8”
17-1/2”
TUFC1212
TUFC1210
TUFC12316
TUFC12250
20
26
35
46
TUDB1212
TUDB1210
TUDB12316
TUDB12250
31
28
45
56
TUF1212J
TUF1210J
TUF12316J
TUF12250J
32
41
54
72
14” 12 Ga.
10 Ga.
3/16”
1/4”
15” 9-1/4” 2” 19-1/4”
19-1/4”
19-3/8”
19-1/2”
TUFC1412
TUFC1410
TUFC14316
TUFC14250
22
29
39
51
TUDB1412
TUDB1410
TUDB14316
TUDB14250
33
40
49
62
TUF1412J
TUF1410J
TUF14316J
TUF14250J
36
47
61
82
16” 12 Ga.
10 Ga.
3/16”
1/4”
17” 10-5/8” 2” 21-1/4”
21-1/4”
21-3/8”
21-1/2”
TUFC1612
TUFC1610
TUFC16316
TUFC16250
25
32
50
56
TUDB1612
TUDB1610
TUDB16316
TUDB16250
36
43
53
67
TUF1612J
TUF1610J
TUF16316J
TUF16250J
41
52
69
91
18” 10 Ga.
3/16”
1/4”
19” 12-1/8” 2-1/2” 24-1/4”
24-3/8”
24-1/2”
TUFC1810
TUFC18316
TUFC18250
37
49
64
TUDB1810
TUDB18316
TUDB18250
43
65
80
TUF1810J
TUF18316J
TUF18250J
58
77
102
20” 3/16”
1/4”
21” 13-1/2” 2-1/2” 26-1/2”
26-1/2”
TUFC20316
TUFC20250
53
70
TUDB20316
TUDB20250
69
86
TUF20316J
TUF20250J
84
112
24” 3/16”
1/4”
25” 16-1/2” 2-1/2” 30-3/8”
30-1/2”
TUFC24316
TUFC24250
63
82
TUDB24316
TUDB24250
78
98
TUF24316J
TUF24250J
100
133
30” 3/8”
1/2”
31” 19-1/2” 3” 37-3/4”
38”
TUFC30375 X 151
X
TUDB30375
TUDB30500
163
238
TUF30375J X 241
X
36” 3/8”
1/2”
37” 22-1/2” 3” 43-3/4”
44”
TUFC36375 X 173
X
TUDB36375
TUDB36500
185
260
TUA36375J X 281
X

† Weights do not include clamps     • Weights do not include couplings

Flared Troughs

U-Troughs
Screw
Dia.
Trough
Thk.
A B C D E Part Number Weight Per
Foot
(Lbs.)
4” NOT AVAILABLE
  14 Ga.       16-5/8”   TFLF614 5
6” 12 Ga.
3/16”
14” 7” 1-1/4” 16-5/8”
16-3/4”
3-1/2” TFLF612
TFLF6316
8
11
  1/4”       16-7/8”   TFLF6250 15
  12 Ga.       21-1/4”   TFLF912 10
9” 10 Ga.
3/16”
18” 9” 1-1/2” 21-1/4”
21-3/8”
5” TFLF910
TFLF9316
18
23
  1/4”       21-1/2”   TFLF9250 37
  12 Ga.       26-1/4”   TFLF1212 17
12” 10 Ga.
3/16”
22” 10” 2” 26-1/4”
26-3/8”
6-1/2” TFLF1210
TFLF12316
22
30
  1/4”       26-3/8”   TFLF12250 41
  12 Ga.       28-1/4”   TFLF1412 19
14” 10 Ga.
3/16”
24” 11” 2” 28-1/4”
28-3/8”
7-1/2” TFLF1410
TFLF14316
24
33
  1/4”       28-3/8”   TFLF14250 45
  12 Ga.       32-1/4”   TFLF1612 20
16” 10 Ga.
3/16”
28” 11-1/2” 2” 32-1/4”
32-3/8”
8-1/2” TFLF1610
TFLF16316
26
36
  1/4”       32-1/2”   TFLF16250 48
18” 10 Ga.
3/16”
1/4”
31” 12-1/8” 2-1/2” 36-1/4”
36-3/8”
36-1/2”
9-1/2” TFLF1810
TFLF18316
TFLF18250
30
40
53
20” 3/16”
1/4”
34” 13-1/2” 2-1/2” 39-3/8”
39-1/2”
10-1/2” TFLF20316
TFLF20250
43
58
24” 3/16”
1/4”
40” 16-1/2” 2-1/2” 45-3/8”
45-1/2”
12-1/2” TFLF24316
TFLF24250
51
68
30” 3/8”
1/2”
48” 19-1/2” 3” 55”
55-3/8”
15-1/2” TFLF30375
TFLF30500
13
184
36” 3/8”
1/2”
54” 22-1/2” 3” 61-1/8”
61-1/2”
18-1/2” TFLF36375
TFLF36500
15
213

Tubular Troughs

Tubular Troughs
Screw
Dia.
Trough
Thk.
A
(Dia.)
B C Non-Split Split
Part Number Wt. Per
Foot
(Lbs.)
Part Number Wt. Per
Foot
(Lbs.)
4” 14 Ga.
12 Ga.
10 Ga.
5” • 1” 7-1/4 N/A TT412-DS
N/A
X 7 X TTF414 TTF412 TTF410 5
7
9
6” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
7” • 1-1/4” 9-3/4”
9-3/4”
9-3/4”
9-7/8”
10”
TT614-DS
TT612-DS
N/A N/A N/A
7
9
X X X
TTF614
TTF612
TTF610
TTF6316
TTF6250
8
10
13
18
26
9” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
10” • 1-7/16” 13-3/8”
13-3/8”
13-3/8”
13-3/8”
13-1/2”
N/A
TT912-DS
TT910-DS
TT9316-DS
TT9250-DS
X 13
17
22
30
TTF914
TTF912
TTF910
TTF9316
TTF9250
11
15
19
25
34
12” 12 Ga.
10 Ga.
3/16”
1/4”
13” 2” 17-1/4”
17-1/4”
17-3/8”
17-3/8”
TT1212
TT1210
TT12316
TT12250
16
21
28
37
TTF1212
TTF1210
TTF12316
TTF12250
20
25
33
45
14” 12 Ga.
10 Ga.
3/16”
1/4”
15” 2” 19-1/4”
19-1/4”
19-3/8”
19-1/2”
TT1412
TT1410
TT14316
TT14250
19
24
32
43
TTF1412
TTF1410
TTF14316
TTF14250
22
29
38
50
16” 12 Ga.
10 Ga.
3/16”
1/4”
17” 2” 21-1/4”
21-1/4”
21-3/8”
21-1/2”
TT1612
TT1610
TT16316
TT16250
21
28
37
49
TTF1612
TTF1610
TTF16316
TTF16250
25
32
42
56
18” 10 Ga.
3/16”
1/4”
19” 2-1/2” 24-1/4”
24-1/2”
24-1/2”
TT1810
TT18316
TT18250
31
41
55
TTF1810
TTF18316
TTF18250
36
48
64
20” 3/16”
1/4”
21” 2-1/2” 26-3/8”
26-1/2”
TT20316
TT20250
46
61
TTF20316
TTF20250
53
70
24” 3/16”
1/4”
25” 2-1/2” 30-3/8”
30-1/2”
TT24316
TT24250
54
73
TTF24316
TTF24250
62
82
30” 3/8”
1/2”
31” 3” 37-3/4”
38”
TT30375
TT30500
136
188
TTF30375
TTF30500
153
210
36” 3/8”
1/2”
37” 3” 43-3/4”
44”
TT36375
TT36500
163
224
TTF36375
TTF36500
180
245

• Down Spouting Used for Non-Split 4, 6, and 9 inch: ”A” Dimension Becomes OD and not ID

Rectangular Troughs

Rectangular Troughs
Screw
Dia.
Trough
Thk.
A B C D Angle Flanged Formed Flanged Double Angle Formed Channel
Part
Number
Wt./Ft.
(Lbs.)
Part
Number
Wt./Ft.
(Lbs.)
Part
Number
Wt./Ft.
(Lbs.)
Part
Number
Wt./Ft.
(Lbs.)
4” NOT AVAILABLE
6” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
7” 4-1/2” 1-1/4” 9-3/4”
9-3/4”
9-3/4”
9-7/8”
10”
TRA614
TRA612
TRA610
TRA6316
TRA6250
8
11
14
19
25
TRF614
TRF612
TRF610
TRF6316
TRF6250
8
11
14
19
25
TRDA614
TRDA612
TRDA610
TRDA6316
TRDA6250
9
12
16
21
28
TRFC614
TRFC612
TRFC610
TRFC6316
TRFC6250
8
11
14
19
25
9” 14 Ga.
12 Ga.
10 Ga.
3/16”
1/4”
10” 6-1/8” 1-1/2” 13-1/4”
13-1/4”
13-1/4”
13-3/8”
13-1/2”
TRA914
TRA912
TRA910
TRA9316
TRA9250
11
15
19
26
34
TRF914
TRF912
TRF910
TRF9316
TRF9250
11
15
19
26
34
TRDA914
TRDA912
TRDA910
TRDA9316
TRDA9250
12
17
22
29
38
TRFC914
TRFC912
TRFC910
TRFC9316
TRFC9250
11
15
19
26
35
12” 12 Ga.
10 Ga.
3/16”
1/4”
13” 7-3/4” 2” 17-1/4”
17-1/4”
17-3/8”
17-1/2”
TRA1212
TRA1210
TRA12316
TRA12250
19
25
31
44
TRF1212
TRF1210
TRF12316
TRF12250
19
25
31
44
TRDA1212
TRDA1210
TRDA12316
TRDA12250
22
28
38
50
TRFC1212
TRFC1210
TRFC12316
TRFC12250
19
25
34
45
14” 12 Ga.
10 Ga.
3/16”
1/4”
15” 9-1/4” 2” 19-1/4”
19-1/4”
19-3/8”
19-1/2”
TRA1412
TRA1410
TRA14316
TRA14250
22
29
38
51
TRF1412
TRF1410
TRF14316
TRF14250
22
29
38
51
TRDA1412
TRDA1410
TRDA14316
TRDA14250
24
32
42
56
TRFC1412
TRFC1410
TRFC14316
TRFC14250
22
29
39
52
16” 12 Ga.
10 Ga.
3/16”
1/4”
17” 10-5/8” 2” 21-1/4”
21-1/4”
21-3/8”
21-1/2”
TRA1612
TRA1610
TRA16316
TRA16250
25
32
42
57
TRF1612
TRF1610
TRF16316
TRF16250
25
32
42
57
TRDA1612
TRDA1610
TRDA16316
TRDA16250
27
35
37
50
TRFC1612
TRFC1610
TRFC16316
TRFC16250
25
33
44
58
18” 10 Ga.
3/16”
1/4”
19” 12-1/8” 2-1/2” 24-1/4”
24-3/8”
24-1/2”
TRA1810
TRA18316
TRA18250
37
49
65
TRF1810
TRF18316
TRF18250
37
49
65
TRDA1810
TRDA18316
TRDA18250
40
54
72
TRFC1810
TRFC18316
TRFC18250
37
49
66
20” 3/16”
1/4”
21” 13-1/2” 2-1/2” 26-3/8”
26-1/2”
TRA20316
TRA20250
54
72
TRF20316
TRF20250
53
71
TRDA20316
TRDA20250
59
78
TRFC20316
TRFC20250
54
73
24” 3/16”
1/4”
25” 16-1/2” 2-1/2” 30-3/8”
30-1/2”
TRA24316
TRA24250
63
85
TRF24316
TRF24250
63
84
TRDA24316
TRDA24250
69
91
TRFC24316
TRFC24250
65
86
30” 3/8” 31” 19-1/2” 3” 37-3/4” TRA30375 154 TRF30375 153 TRDA30375 166 TRFC30375 157
36” 3/8” 37” 22-1/2” 3” 43-3/4” TRA36375 180 TRF36375 178 TRDA36375 192 TRFC36375 183