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Sahara Air Products

Sahara-Pak Heat-of-Compression Air Dryer


Model SP Theory of Operation

 

 

Simple, Low Cost SP

 

The flow chart below illustrates the efficient SP system. Air enters the dryer directly from the compressor. It is directed into the regenerating tower, where the heat-of-compression removes the moisture from the desiccant. The air then flows into the aftercooler, into the coalescing-type moisture separator, and into the drying tower where the air is dried to its final low dew point.

Model SP Heat-of-Compression Flow Chart Acrobat icon Get Adobe Reader

Left Tower Heating, Right Tower Drying

 

The SP switches towers every half hour. (With the Optional Dew Point Demand System, the cycle is extended until the drying tower reaches saturation.)

 

At tower shift, a small temperature and dew point bump occurs, as with most other heat reactivated dryers. The small amount of high dew point air blends in with the previously dried air to maintain a low overall dew point.

 

The DPDS turns off the timer and switches the towers only when the dew point at the outlet of the dryer rises to a preset level indicating the desiccant in the drying tower is saturated. Switching towers on demand uses the full capacity of the desiccant, reduces the number of tower shifts, and compensates for fluctuations in compressor flow. The DPDS allows the dryer to be operated at 0 to 100% capacity.


Specifications

 

Model SP Side Drawing Model SP Top Drawing

Model

Length = A
(Inches)

Width = B
(Inches)

Height = C
(Inches)

Inlet/Outlet
Size
(Inches)

Lbs. Desiccant per Tower

Water Required @ 85F GPM*

SCFM RATING
@ 100#

Approx.
Weight
(Lbs.)

SP-125

96

31

67

1

41

8

125

1475

SP-180

96

33

67

1 1/2

60

11

180

1713

SP-280

96

36

66

1 1/2

92 1/2

17

280

1948

SP-400

96

38

68

2

132

16

400

2345

SP-600

93

46

60

3

200

24

600

3167

SP-900

100

46

64

3

300

37

900

3630

SP-1200

106

60

83

4

385

49

1200

4880

SP-1800

127

75

88

4

595

73

1800

5220

SP-3200

136

76

95

6

1055

98

3200

8970

SP-4400

154

96

95

6

1450

134

4400

10528

SP-6000

175

96

102

8

1980

183

6000

12839

SP-8500

190

138

107

8

2805

260

8500

16290

SP-10000

201

145

109

10

3300

306

10000

22130

 

Sahara reserves the right to make changes without notification. Some models not shown. Larger sizes available. Other pressures available. Metric dimensions available upon request. Ratings are based on 100 PSIG, 100°F.

* Assumes 350F air inlet temperature; for lower regeneration temperatures, less water is necessary.

Our sales engineers will help you select the right system for your application. They have the expertise to review your plant air system and design the optimum engineered solution.

 

We can build a dryer to meet your strict performance requirements.