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Arrow Pneumatics, Inc.

Air Dryers

Series RE Externally Heated Regenerative Air Dryer

Series RE is an externally heated twin tower regenerative air dryer. They combine the high reliability of Arrow's "RH" series desiccant dryer and add external heaters to for the "RE" series dryer. Dew points, normally -40°F, can be optionally as low as -100°F. Purge air is approximately 7% of rated flow, thus reducing the operating costs of the heated twin tower regenerative dryers compared to heatless regenerative dryers. Purge air in the "RE" series is heated by a 100% efficient incoloy sheath electric heater housed in an externally mounted shell. A thermostat controls the temperature of the heater allowing long life and energy savings. The heater and purge piping are insulated for safety and further energy savings. Arrow "RE" series heated dryers have microprocessor controls housed in a NEMA 4 rated enclosure. Pneumatically actuated valves have been chosen for long life and high air flow.
 
RE dryer Standard Features of Externally Heated Regenerative Dryers:
  • Externally mounted heater allows easy element service and efficiently conducts heat uniformly throughout the desiccant eliminating localized hot spots, desiccant fusing and heater burnouts. Heater elements are incoloy sheathed for long, trouble free service.
  • Heater thermostat controls and maintains user adjusted regeneration temperature to account for chaging flow or seasonal moisture variations.
  • Interlock circuit protects units from heater burnout due to loss of purge air flow.
  • Non-lubricated control valves are pneumatically actuated to provide maximum dependability and maintenance free operation.
  • Fully automatic to provide the most efficient operation.
  • Panel mounted gauges provide accurate monitoring of tower pressures and temperatures.
  • Adjustable purge regulator is utilized to control purge air for optimum dryer efficiency.
  • Indicator lights display tower operating status.
  • Visual moisture indicator detects increase in dew point on outlet air flow.
  • Controlled repressurization gradually increases pressure in the tower to eliminate line surges and desiccant attrition.
  • Removable stainless steel diffuser screens disperse air flow for maximum desiccant capacity and to allow uniform air distribution throughout the desiccant bed.
  • NEMA 4 electrical construction.
  • Power on indicator to show dryer is energized and functioning.
  • Tower relief valves to prevent overpressurization.
  • ASME coded and stamped vessels
  • Separate fill and drain ports for easy desiccant change.
  • Microprocessor controls provide reliable sequencing of dryer functions.
  • Control air line filter with replaceable element to protect pneumatic circuitry.
  • Exhaust purge muffler for quiet operation.
  • Pressure alarm package indicates failure to shift, failure to depressurize, failure to represurize and failure to purge.
Standard design conditions are 100°F inlet, 100 psig and 100°F ambient. The "RE" series has a capacity from 50 to 3000 CFM at 100 psig. Maximum standard operating pressure is 150 psig. Standard voltage is 120 VAC, single phase, 60Hz. In/out connections range from 3/4" NPT to 4" flange. Pre and after filters must be used with all regenerative air dryers. There are a number of panel and electrical options available.
 

 
Model In/Outlet Conn. Flow Capacity SCFM Heater Power (KW) Height Inches Width Inches Depth Inches Weight Lbs. Prefilter Model Afterfilter Model
RE231 3/4" NPT 50 .75 40 44 24 440 F505-06DF F329-06-3
RE232 3/4" NPT 50 1.25 40 44 24 600 F505-06DF F329-06-3
RE233 1" NPT 100 1.50 64 44 24 760 F508-08DF F329-08-3
RE234 1-1/2" NPT 150 2.00 75 49 36 930 F510-12DT F329-12-3
RE235 1-1/2" NPT 200 2.50 75 49 36 1050 F510-12DT F329-12-3
RE236 1-1/2" NPT 250 3.00 75 49 36 1330 F510-12DT F329-12-3
RE237 2" NPT 300 4.00 68 51 36 1525 F510-16DT F3N1-16-3
RE238 2" NPT 350 4.00 68 51 36 1700 F510-16DT F3N1-16-3
RE239 2" NPT 400 5.00 86 51 36 1940 F518-16DT F3N1-16-3
RE240 2" NPT 500 6.00 86 51 36 2275 F518-16DT F3N1-16-3
RE241 2-1/2" NPT 650 6.50 97 67 36 2650 F519-24DT F3NHF-24-3
RE242 2-1/2" NPT 750 7.50 97 67 36 3170 F529-24DTF F3NHF-24-3
RE243 2-1/2" NPT 900 9.00 97 67 36 4175 F529-24DT F3NHF-246-3
RE244 3" FLG 1100 12.00 97 72 36 4580 F5AX2M-24DF F3AX2M-24-3
RE245 3" FLG 1300 12.00 97 72 36 4580 F5AX2M-24DF F3AX2M-24-3
RE246 3" FLG 1500 15.00 122 96 60 5020 F5AX2L-24DF F3AX2M-24-3
RE247 3" FLG 1800 20.00 122 96 60 5410 F5AX2L-24DF F3AX2M-24-3
RE248 4" FLG 2100 20.00 122 96 60 6040 F5AX3L-32DF F3AX2M-32-3
RE249 4" FLG 2500 24.00 122 108 60 8720 F5AX4L-48DF F3AX3L-48-3
RE250 4" FLG 3000 30.00 122 108 60 9880 F5AX4L-48DF F3AX3L-48-3
Flow ratings based on design conditions of 100°F inlet air temperature, 100 psi, 100°F ambient air temperature.
 
Optional Instrument and Features
1) Dew Point Demand Plus
2) Dew Point Demand
3) High Humidity Alarm
 
4) -100°F Pressure Dew Point
5) Remote Alarm Contacts
6) Remote Alarm Dry Contacts
 
7) NEMA 7 Explosion Proof Electrical Construction
8) Low Ambient Package
9) 220V/1ph/60Hz
 
10) 220V/1ph/60Hz
11) Pre-piped Filter Package
12) Three Valve Bypass Filter Package
 
13) Seven Valve Bypass Filter Package
14) Power Saver Thermal Control
15) Heater Overtemp Alarm
 
16) RS-232 Serial Communications Interface

 
RE 231 A 1 A 1 A 1 A 1 A 1 Externally heated regenerative dryer; 50 SCFM; -40°F dew point, 120v/1ph/60Hz;NEMA 4; no dew point control & monitoring options; no heater option; no remote alarm contact options; no pre-piping and bypass options, no RS-232 serial communications interface, no low ambient options; no cool down loop option.
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1
2		 Cool Down Loop Option (BP Dryers Only)
None
Blower Purge Cool Down Loop
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A
B		 Low Ambient Option
None
Low Ambient Insulation
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1
2		 RS-232 Interface Option
None
RS-232 Serial Communications Interface
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A
B
C
D		 Pre-Piping and Bypass Option
None
Pre-piped Filter Package
Pre-piped Filter Package w/3 Valve Dryer Bypass
Pre-piped Filter Package w/7 Valve Dryer Bypass
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1
2
3		 Remote Alarm Contacts Option
None
Remote Alarm Contacts (120V)
Remote Alarm Dry Contacts
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A
B
C
D		 Heater Options (RE Dryers Only)
None
Heater Overtemp Alarm
Power Saver Thermal Control
Heater Overtemp Alarm and Power Saver
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2
3
4
5		 Dew Point Control & Monitoring Options
None
Dew Point Demand Plus
Dew Point Demand
Dew Point Demand and High Humidity Alarm
High Humidity Alarm
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A
B
C		 Electrical Construction
NEMA 4
NEMA 7
Total Pneumatic Control (RE Dryers Only)
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1
2
3
4		 Voltage
120V/1ph/60Hz
480V/3ph/60Hz
220V/1ph/60Hz
220V/3ph/60Hz
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A
B		 Dew Point
-40°F
-100°F
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231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250		 Dryer Size
50 SCFM
75 SCFM
100 SCFM
150 SCFM
200 SCFM
250 SCFM
300 SCFM
350 SCFM
400 SCFM
500 SCFM
650 SCFM
750 SCFM
900 SCFM
1100 SCFM
1300 SCFM
1500 SCFM
1800 SCFM
2100 SCFM
2500 SCFM
3000 SCFM
+
RE		 Model
Externally Heated Regenerative Dryer

 
If you are located in Missouri, Kansas, Nebraska, or Illinois, you may contact us at the following telephone and fax numbers with your requests or questions:
St. Louis telephone 314.428.4000 fax 314.428.4097
Kansas City telephone 913.829.5900 fax 913.829.0815
 
For ALL OTHER AREAS Please use the Info Request form for specific product information, pricing or other information. Please include company name, contact name, address, phone number and fax number to ensure a timely response.
 
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Copyright © 2003 Flo-Products Company
Last modified:
Brochure: X1005