Screw Conveyors – Capacity Table

Trough Loading

Screw Dia.

Pipe Size

(Nom. Dia.)

Used for

Capacity Tables

Maximum RPM

Capacity in Cu. Ft. Per Hr.*

At

Maximum RPM

At

1 RPM

45%

  6

  9

12

14

16

18

20

24

30

2

    2 ½

3

    3 ½

    3 ½

4

4

4

4

     165

     155

     145

     140

     130

     120

     110

     100

90

    368

  1240

  2813

  4330

  6126

  8052

10253

16368

29150

  2.23

  8.00

19.40

30.93

47.12

 67.10

  93.21

163.68

323.89

30%A

  6

  9

12

14

16

18

20

24

30

2

    2 ½

3

    3 ½

    3 ½

4

4

4

4

     120

     100

90

85

80

75

70

65

60

   180

    536

  1164

  1753

  2514

  3355

  4350

  7093

12955

   1.50

   5.36

  12.93

  20.62

  31.42

  44.73

  62.14

109.12

215.92

30%B

  6

  9

12

14

16

18

20

24

30

2

    2 ½

3

    3 ½

    3 ½

4

4

4

4

60

55

50

50

45

45

40

40

35

   90

 295

  647

1031

1414

2013

2486

4365

7557

           1.50

           5.36

         12.93

         20.62

         31.42

         44.73

         62.14

       109.12

       215.92

15%

  6

  9

12

14

16

18

20

24

30

2

    2 ½

3

    3 ½

    3 ½

4

4

4

4

60

55

50

50

45

45

40

40

35

   45

 147

 323

 516

  707

1006

1242

2182

3779

             .75

           2.68

           6.46

         10.31

         15.70

         22.36

         31.06

         54.56

       107.96

*Capacities shown are for full pitch screws. Consult factory for inclined conveyors.

 Dimensions in inches.