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Screw Conveyor Troughs

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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

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