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Mattei MPD Series Desiccant Air Dryers
Heatless

107 to 3,000 SCFM
MPD Series are traditional heatless dryers design ideal for providing clean, dry air to -40°F for process applications and where air lines are subject to icing from freezing temperatures.

MPD Series with (EMS) are designed to prepare the offline desiccant tower for service, and then saving energy by managing the purge air function to minimze wasted energy.

Mattei MPD Series Series heatless desiccant dryers use about 15% of the process purge air stream capacity to strip the moisture off of the offline desiccant bed then, exhausting the water vapor to ambient.

Mattei’s patented Multi-Port Regeneration System affects superior desiccant bed regeneration and, as a result, provides better and more consistent performance. The Multi-Port Regeneration System injects heated purge air at precise points up and down the towers’ length providing a more balanced distribution of heat.
Heatless Twin Tower - Standard Design
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   Model
SCFM
Air Connection
MPD-107-1.0NPT
107
1" NPT
MPD-135-1.0NPT
135
1" NPT
MPD-200-1.5NPT
200
1-1/2" NPT
MPD-250-1.5NPT
250
1-1/2" NPT
MPD-300-1.5NPT
300
1-1/2" NPT
MPD-400-2.0NPT
400
2" NPT
MPD-510-2.0NPT
510
2" NPT
MPD-650-2.0NPT
650
2" NPT
MPD-770-2.0NPT
770
2" NPT
MPD-1000-3FLG
1000
3" Flg
MPD-1200-3FLG
1200
3" Flg
MPD-1500-4FLG
1500
4" Flg
MPD-2000-4FLG
2000
4" Flg
MPD-2600-4FLG
2600
4" Flg
MPD-3000-6FLG
3000
6" Flg
Nominal Capacity based on: Ambient temperature 100°F, Inlet temperature 100°F, Inlet pressure 100 psi g. Refer to sizing chart of brochure for other conditions. * Consult mdi for -100°F pressure dew points

1. Pre & After filters with automatic drain ARE included in the unit price. Filters supplied mounted on Models MPD-200 - MPD-700
2. Standard electrical requirement of 115V/1Ph/60Hz
3. Standard design pressure: 150 psi g
4. If MATTEI MCF/MFF Series filters are not used for protection of the dryer, warranty may be invalid
5. Maximum Inlet Temperature: 120°F
6. Minimum Inlet Temperature: 50°F

Heatless Twin Tower Design with Energy Management System (EMS)
*Scroll to the right on mobile to see entire chart
   Model
SCFM
Air Connection
MPD-107-1.0NPT-EMS
107
1" NPT
MPD-135-1.0NPT-EMS
135
1" NPT
MPD-200-1.5NPT-EMS
200
1-1/2" NPT
MPD-250-1.5NPT-EMS
250
1-1/2" NPT
MPD-300-1.5NPT-EMS
300
1-1/2" NPT
MPD-400-2.0NPT-EMS
400
2" NPT
MPD-510-2.0NPT-EMS
510
2" NPT
MPD-650-2.0NPT-EMS
650
2" NPT
MPD-770-2.0NPT-EMS
770
2" NPT
MPD-1000-3FLG-EMS
1000
3" Flg
MPD-1200-3FLG-EMS
1200
3" Flg
MPD-1500-4FLG-EMS
1500
4" Flg
MPD-2000-4FLG-EMS
2000
4" Flg
MPD-2600-4FLG-EMS
2600
4" Flg
MPD-3000-6FLG-EMS
3000
6" Flg
Nominal Capacity based on: Ambient temperature 100°F, Inlet temperature 100°F, Inlet pressure 100 psi g. Refer to sizing chart of brochure for other conditions. * Consult mdi for -100°F pressure dew points

1. Pre & After filters with automatic drain ARE included in the unit price. Filters supplied mounted on Models MPD-200 - MPD-700
2. Standard electrical requirement of 115V/1Ph/60Hz
3. Standard design pressure: 150 psi g
4. If MATTEI MCF/MFF Series filters are not used for protection of the dryer, warranty may be invalid
5. Maximum Inlet Temperature: 120°F
6. Minimum Inlet Temperature: 50°F

Digital Readout
The Control Center features a backlit four line character display that monitors operation and status. Regenerating countdowns and time remaining are included.

Sequence Annunciator
Indicates the status of each tower. LED’s indicate which tower is “on-line” drying, “off-line” regenerating as well as the regeneration stages.

Manual Stepping
Allows the operator to quickly and safely step the dryer through a complete 8 hour cycle, in a matter of minutes.

ThermaLocTM
The Control Center also controls Mattei’s “ThermaLocTM” heater protection system. ThermaLocTM ensures maximum reliability and eliminates the safety concerns often associated with heat reactivated dryers. Heaters are protected by a totally redundant dual shutdown system that utilizes independent contactors. In addition to the redundant temperature controllers, the system monitors pressure and shuts the heater down in the event of low line pressure. Blower purge dryers have controls to prevent the heater from energizing if the blower is not running.

Dual Mode Heatless Back Up System
Allows the dryer to function in either the primary heated mode or the auxiliary heatless mode. Should the system experience a temporary overload or a heater failure, the dryer can easily be switched over to operate in the heatless mode. This way the dryer will remain on line until such time as service can be conveniently scheduled. The Dual Mode Back Up System offers unparalleled flexibility, eliminates downtime and prevents business interruptions.

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*Scroll to the right on mobile to see entire chart
Model
Length (in)
Width (in)
Height (in)
Weight (lbs net)
MPD-107
18
31
79
468
MPD-135
18
31
79
496
MPD-200
22
37
82
692
MPD-250
22
40
80
776
MPD-300
22
40
80
796
MPD-400
27
43
85
1626
MPD-510
27
45
84
1735
MPD-650
27
47
84
1740
MPD-770
28
50
87
2120
MPD-1000
41
74
92
3676
MPD-1200
41
74
103
4605
MPD-1500
41
74
113
4985
MPD-2000
48
78
96
5206
MPD-2600
60
96
112
7600
MPD-3000
60
96
112
8300