Dual Tower Desiccant Dryer

The GDHM Series desiccant air dryers use the proven “Pressure Swing Adsorption” (PSA) method for drying wet compressed air. This requires having two identical towers containing hygroscopic desiccant. The unique design of the GDHM Series allows for the dryer to start and stop with a compressor or point-of-use equipment to eliminate purge loss when off. The solid state memory feature allows the dryer to start where it left off in the drying cycle to prevent wet air downstream.


Timing Cycle

MODEL

TOTAL CYCLE

REGENERATING

REPRESSURIZING

GDHM3-12

90 Seconds with 45 Seconds
Drying Per Tower

33 Seconds

12 Seconds

GDHM16-50

180 Seconds with 90 Seconds
Drying Per Tower

66 Seconds

24 Seconds

Dimensions

Model

Inches

In

Out

Weight

In/Out

H

W

D

P

SCFM

SCFM

lbs

NPT

GDHM3

13.8

7.3

5.3

8.4

3

2.2

8

⅜"

GDHM6

18.3

7.3

5.3

13

6

4.4

9

⅜"

GDHM9

17.3

7.3

5.3

12.0

9

6.6

10

⅜"

GDHM12

20.1

7.3

5.3

14.9

12

8.8

11

⅜"

GDHM16

33

9.5

6.6

20.7

16

12.6

29

½"

GDHM25

41.9

9.5

6.6

29.5

25

19.6

34

½"

GDHM35

39.3

10

7.1

33.4

35

27.4

59

½"

GDHM50

46.3

10

7.1

33.4

50

39.2

65

½"

Standard flows (SCFM) at 100 psig and 100

Correction Factors: 125 psi = 1.22, 150 psi = 1.44

Note: Inlet and outlet filtration required for proper dryer performance.

Voltage: 115/1/50/60 or 230/1/50/60

Maximum Inlet Temperature: 120° F

Minimum Ambient Temperature: 32° F

Maximum Inlet Pressure: 150 psig

Inlet Filtration Recommended: 5 micron and .01 micron (Coalescing)

Inlet Filtration Required: .01 micron (Coalescing)

Outlet Filtration Recommended: 1 micron (Particulate)°F inlet with -40° F pressure dew point.

Consult factory for -100° F dew point and performance at other inlet pressures (50-150 psi),or inlet temperatures above 100° F.

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