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Arrow Pneumatics, Inc.

Air Dryers

Series RH Regenerative Heatless Air Dryer

Series RH is a twin tower regenerative air dryer. They are the dryers of choice when traditional refrigerated dryers do not provide sufficient air quality required for today's applications. Arrow's reliable "RH" series of heatless twin tower regenerative dryers normally produce -40°F and can optionally be as low as -100°F dew points. The dryer utilizes activated alumina for efficient drying of compressed air and will operate under extreme environmental conditions. Activated alumina is aluminum oxide that is highly porous and exhibits tremendous surface area (350 sq. meters/gram). Activated alumina is resistant to thermal shock and abrasion. It has a smooth, uniform ball size that prevents channeling of the air flow, which maintains low bed velocities. This maintains air contact time for efficient moisture removal and minimal pressure drop.
Arrow's microprocessor dryer controls are housed in a NEMA 4 rated enclosure and provide control of pneumatically pilot valves chosen for long life and high air flow.
 
RE dryer Standard Features of Heatless Regenerative Dryers:
  • Fully automatic to provide the most efficient operation.
  • Panel mounted gauges provide accurate monitoring of tower pressures.
  • 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.
  • Reliable pneumatic valve operation is achieved by using poppet, butterfly and check valves. All valves are non-lubricated to provide maximum dependability and maintenance free operation.
  • 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.
  • Universally accepted 120V/1ph/60Hz power requirements for easy connection.
  • 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 "RH" series has a capacity from 35 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 Height Inches Width Inches Depth Inches Weight Lbs. Prefilter Model Afterfilter Model
RH203 3/4" NPT 50 40 44 24 360 F505-06DF F329-06-3
RH204 3/4" NPT 50 40 44 24 508 F505-06DF F329-06-3
RH205 3/4" NPT 75 40 44 24 599 F505-06DF F329-06-3
RH206 1" NPT 100 64 44 24 627 F508-08DF F329-08-3
RH207 1" NPT 125 64 44 24 657 F508-08DF F329-08-3
RH208 1-1/2" NPT 150 75 49 36 739 F510-12DT F329-12-3
RH209 1-1/2" NPT 200 75 49 36 797 F510-12DT F329-12-3
RH210 1-1/2" NPT 250 75 49 36 855 F510-12DT F329-12-3
RH211 2" NPT 300 68 51 36 918 F510-16DT F3N1-16-3
RH212 2" NPT 350 68 51 36 1124 F510-16DT F3N1-16-3
RH213 2" NPT 400 86 51 36 1187 F518-16DT F3N1-16-3
RH214 2" NPT 500 86 51 36 1245 F518-16DT F3N1-16-3
RH215 2-1/2" NPT 650 97 67 36 1905 F519-24DT F3NHF-24-3
RH216 2-1/2" NPT 750 97 67 36 2022 F529-24DTF F3NHF-24-3
RH217 2-1/2" NPT 900 97 67 36 2197 F529-24DT F3NHF-246-3
RH218 3" FLG 1100 97 72 36 2590 F5AX2M-24DF F3AX2M-24-3
RH219 3" FLG 1300 97 72 36 3350 F5AX2M-24DF F3AX2M-24-3
RH220 3" FLG 1500 122 96 60 3775 F5AX2L-24DF F3AX2M-24-3
RH221 3" FLG 1800 122 96 60 4550 F5AX2L-24DF F3AX2M-24-3
RH222 3" FLG 2100 122 96 60 5725 F5AX3L-32DF F3AX2M-32-3
RH223 4" FLG 2500 122 108 60 6500 F5AX4L-48DF F3AX3L-48-3
RH224 4" FLG 3000 122 108 60 8500 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) Pre-piped Filter Package
11) Three Valve Bypass Filter Package
12) Seven Valve Bypass Filter Package
 
13) RS-232 Serial Communications Interface
14) Total Pneumatic Controls

 
RH 203 A 1 A 1 A 1 A 1 A 1 Heatless 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 (RH 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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203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224		 Dryer Size
35 SCFM
50 SCFM
75 SCFM
100 SCFM
125 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
+
RH		 Model
Heatless 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