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Mattei MDS Series Refrigerated Air Dryers

20 to 2,000 SCFM
Mattei MDS Series dry storage cycling dryers automatically start and stop the refrigeration compressor to maintain dew point keeping your air system free of water.

The advanced Mattei MDS cycling refrigeration air dryer combines the advantages of a direct thermal exchange with advanced Dry Storage Technology. It’s two dryers in one.

By combining these two powerful energy saving technologies the MDS provides you with the lowest power consumption available in the market today. This cutting edge, patented concept not only reduces your energy bill, it also offers steady dew point performance and reliable operation to ensure you have continuous, worry free, clean and dry compressed air.

With unique digital controls that automatically manage energy consumption. and reliable timed drains that automatically eject entrained liquid condensate - the MDS cycling dryer saves energy and maximized reliability. It is the ultimate solution to remove moisture from your compressed air system.
MDS Display
The Mattei MDS features a simple microprocessor based control and protection system which controls the dryer operation and adapts to the specific heat load demands.

The Mattei MDS features easy to use advanced controls that include digital dew point temperature display, menu driven programming and icons for drain and compressor operation.
Model(s): MDS 20, MDS 30, MDS 45, MDS 65, MDS 90, MDS 110, MDS 130, MDS 165, MDS 200, MDS 265, MDS 325, MDS 400, MDS 500, MDS 650, MDS 850, MDS 1050, MDS 1300, MDS 1600, MDS 2000
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   Model
SCFM(2)
115V/1ph(6)(4)
230V/1ph(4)
460V/3ph(4)
575V/3ph(5)(4)
Absorbed kW(3)
Air Connection(1)
MDS 20
20
0.23
1/2" NPT
MDS 30
30
0.24
3/4" NPT
MDS 45
45
0.25
3/4" NPT
MDS 65
65
0.47
1" NPT
MDS 90
90
0.49
1" NPT
MDS 110
110
0.51
1" NPT
MDS 130
130
0.97
1-1/2" NPT
MDS 165
165
1.02
1-1/2" NPT
MDS 200
200
1.29
2" NPT
MDS 265
265
1.41
2" NPT
MDS 325
325
1.47
2" NPT
MDS 400
400
1.52
2" NPT
MDS 500
500
2.6
2-1/2" NPT
MDS 650
650
3.46
3" NPT
MDS 850
850
3.6
3" NPT
MDS 1050
1050
3.96
3" NPT
MDS 1300
1300
4.23
3" NPT
MDS 1600
1600
5.63
4" FLG
MDS 2000
2000
6.87
4" FLG

(1) ½" to 3" connections are NPT threaded. 4" connections are flanged.
(2) In compliance with CAGI (ADF 100) / NFPA (class H): Inlet temperature: 100°F, ambient temperature: 100°F, inlet pressure: 100 psig, pressure dew point: 33°F to 39°F, and pressure drop not to exceed 5 psid. For all other conditions refer to the correction factors on the next page. For performance at other conditions, contact mdi.
(3) Nominal absorbed power at rated operating conditions using 115/1/60 or 460/3/60 power supply (as applicable). For absorbed power at other voltages or conditions, contact mdi.
(4) Specify voltage reqiurements when ordering.
(5) Includes 460 Volt to 575 Volt transformer internally mounted and wired.
(6) 115 volt models include 6 foot long power cord with grounded plug
NOTES:
- For reliable operation and to meet warranty conditions, a prefilter must be installed. See MF1 filters on pages 10 thru 14.
- MDS Series dryers available with UL/CSA . Must be specified on purchase order at time of order. May extend lead time.

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Specifications
MDS 0020 to 0850
MDS 1050 to 2000
design operating pressure range
0 to 232 psig
0 to 232 psig
maximum inlet air temperature
158° F
158° F
maximum ambient temperature
115° F
110° F
condenser cooling options
air only
air (standard)
refrigerant type
Models 20-110: R134a
Models 130 -850: R407C
Models 0130 - 2000 contain R407C
Models 265, 325 and 400 in 460V: R134A

Standard equipment MDS 0020 to MDS 02000
Electronic Control and interface includes:
• Menu-driven programming capability with password protection
• Digital display of dewpoint
• Icon display of compressor operation
• User-adjustable dew point control
• User-adjustable timer drain control with drain actuation icon
• Refrigerant pressure gauge
• Manual drain test button

Patented Dual Transfer Heat Exchanger
• Aluminum heat sink fin structure
• Silica thermal mass cold storage
• o Cyclonic moisture separator for highly efficient removal of condensed liquid at all flow rates

Automatic cycling refrigeration control
• continuously and automatically adjusts itself to the actual working parameters
• accurate dewpoint control

 Click Here for MDS Correction Factors Chart

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*Scroll to the right on mobile to see entire chart
Model
Length (in)
Width (in)
Height (in)
Weight (lbs net)
MDS 20
16
17
22
82
MDS 30
18
18
26
106
MDS 45
18
18
26
112
MDS 65
21
23
30
196
MDS 90
21
23
30
200
MDS 110
21
23
30
205
MDS 130
24
29
36
290
MDS 165
24
29
36
302
MDS 200
30
29
39
385
MDS 265
30
29
39
385
MDS 325
30
29
39
396
MDS 400
30
29
39
407
MDS 500
42
29
47
553
MDS 650
61
29
59
803
MDS 850
61
29
59
814
MDS 1050
49
49
65
1600
MDS 1300
49
49
65
1800
MDS 1600
67
49
71
2500
MDS 2000
67
49
71
3100