Name

Type mm

Specific surface area m²/m³

Void %

Heapng Num n/m³

Heaping Weight kg/m³

Packing surface area m^-1

Dry packing factor  m^-1

Hollow ball

Ø25

118

47

64000

64

Ø38

286

115

25000

73

Ø50

237

90

11500

 66

Ø40

220

92

1280

61.5

Haier ring

Dg50×56

100

0.94

8000

46

56

Dg76×76

75.3

0.96

3420

45

87

Dg100×100

75

95

1850

52

46

Rosette ring

25×9

195

0.82

170000

136

47×19

185

0.88

32500

88

51×19

180

0.89

25000

70

59×19

150

 0.92 

17500

51

73×27.5

127

0.89

8000

52

95×27.5

94

0.90

3900

53

145×48

65

0.95

1100

47

Ladder ring

16×8.9×1.0

370

0.85

299136

135.6

602.6

25×12.5×1

228

0.90

81500

66

312.8

38×19×1.1

132.5

0.91

27200

52

175.8

50×25×1.5

114.2

 0.927

10740

42

143.1

76×38×2.6

90

 0.929

3420

52

112.3

Pall ring

16×16×1

205 

0.91

180000

90

275

25×25×1.2

195

0.90

53500

75

239

38×38×1.4

1>

0.90

15800

57

220

 50×50×1.5

105

0.90

6500

45

127

76×76×2.6

73.2

0.92

1927

52

94

Rectangle saddle ring

25×12.5×1.2

288

0.847

97680

102

473

38×19×1.2

265

0.95

25200

63

405

50×25×1.5

250

0.96

9400

75.2

332

76×38×2.6

200

0.97

3700

59.2

289

Conjugate ring

25×25×1.2

185

0.95

74000

 96.1

216

 38×38×1.5

116

0.96

18650

68

131

40×40×1.5

104

0.80

9200

66

164

 50×50×1.5

85

0.80

9000

83

97

76×76×2.6

81

0.95

3980

84

94.5