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RNHI Series 20-125 SCFM
High Inlet Temperature Refrigerated Compressed Air Dryers

FS-Curtis RNHI High Inlet Temperature refrigerated air dryers are designed to efficiently dry compressed air with inlet temperatures up to 180°F. With six pre-engineered sizes to choose from, the RNHI is the ideal drying solution for auto service centers and general shop air applications that use piston type air compressors 5.0 to 30 horsepower.

Benefits & Features:
  • Moisture removal to ISO 8573-1: 2010 Quality Class 6 (50°F) pressure dew point
  • Certified for quality and safety to UL1995/CSA 22.2 No. 236-95
  • Environmentally friendly R-134a and R-407c refrigerants
  • Stainless steel brazed plate heat exchangers with integral demister separator ensure optimal heat transfer for the life of the dryer
  • Widely spaced Inlet/Outlet connections, flow direction stamped into cabinet, for ease of installation and filter mount
  • Adjustable timed electric drain – valve open and closed time – reliably discharges condensate from the dryer
  • Instrumentation with lighted compressor On/Off switch, dew point temperature indicator and fault light
  • Top mount fan, upward condenser air flow allows installation in tight spaces
  • Bottom base rail with pre-drilled mounting holes for secure floor mount
  • Quick release front panel for ease of access to dryer internals for routine maintenance

Models: RNHI20, RNHI25, RNHI35, RNHI50, RNHI75, RNHI125

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Quantity
Add to
Quote
Model
Flow
Capacity
Power
Requirements
Inlet/Outlet
Connections
Refrigerant
Type2
Dimensions
Weight
SCFM1
V/ph/Hz (kW)
NPT (in.)
H in.
(mm)
W in.
(mm)
D in.
(mm)
Lbs. (kg)
RNHI20
20
115/1/60 (0.69)
¾"
R-134a
29(744)
14(366)
17(430)
100(45)
RNHI25
25
115/1/60 (0.69)
¾"
R-134a
29(744)
14(366)
17(430)
100(45)
RNHI35
35
115/1/60 (0.99)
¾"
R-407c
29(744)
14(366)
17(430)
106(48)
RNHI50
50
115/1/60 (0.83)
1"
R-407c
41(1044)
18(447)
17(430)
125(57)
RNHI75
75
115/1/60 (1.13)
1"
R-407c
41(1044)
18(447)
17(430)
130(59)
RNHI125
125
230/1/60 (1.97)
1"
R-407c
46(1166)
18(447)
17(430)
153(69)
Maximum Working Pressure: 42-227 psig (3.0-16.0 bar) | Maximum Inlet Temperature: 40°F-180°F (4°C-43°C) | Ambient Temperature Range: 40°F-110°F (4°C-43°C)
To ensure optimal performance, do not operate continuously in conditions below or above max/min specifications.
1Rating conditions are 180°F inlet temperature, 125 psig inlet pressure, 100% inlet relative humidity, 100°F ambient temperature.
2 Refer to dryer data plate for refrigerant charge.


Capacity Correction Factors
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CAPACITY FOR FLOWS BASED ON 180°F, 82°C INLET
Model
Flow Capacity
SCFM1 @ 175
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 150
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 125
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 100
Recommended
Air Compressor
Size
PSIG
(12 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(11 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(9 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(7 KG/CM2)
60 HZ (50 HZ)
HWS Oil/Water
Separator
60 HZ (50 HZ)
RNHI20
23 (20)
5 (5)
22 (18)
5 (5)
20 (17)
5 (5)
18 (15)
5 (5)
RNHI25
29 (24)
7.5 (7.5)
27 (23)
7.5 (7.5)
25 (21)
7.5 (5)
23 (19)
5 (5)
RNHI35
41 (31)
10 (7.5)
38 (29)
10 (7.5)
35 (27)
10 (7.5)
32 (24)
7.5 (7.5)
RNHI50
58 (58)
15 (15)
54 (54)
15 (15)
50 (50)
15 (10)
45 (45)
10 (10)
RNHI75
87 (71)
20 (20)
81 (66)
20 (15)
75 (61)
20 (15)
68 (5)
15 (15)
RNHI125
145 (121)
30 (30)
135 (112)
30 (30)
125 (104)
30 (25)
114 (95)
25 (20)
For typical applications where there is NO aftercooler installed upstream
1 Capacity @ 180°F (82°C) inlet temperature, 160°F (71°C) inlet pressure dew point, 95°F (35°C) ambient temperature, 50°F (10°C) outlet pressure dew point, and less than 5 psig (0.35 kg/cm2) pressure drop.

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CAPACITY FOR FLOWS BASED ON 100°F, 38°C INLET
Model
Flow Capacity
SCFM1 @ 175
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 150
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 125
Recommended
Air Compressor
Size
Flow Capacity
SCFM1 @ 100
Recommended
Air Compressor
Size
PSIG
(12 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(11 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(9 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
PSIG
(7 KG/CM2)
60 HZ (50 HZ)
HP
60 HZ (50 HZ)
RNHI20
32 (27)
10 (7.5)
30 (25)
7.5 (7.5)
28 (23)
7.5 (7.5)
25 (21)
7.5 (5)
RNHI25
40 (33)
10 (10)
37 (31)
10 (7.5)
34 (29)
10 (7.5)
31 (26)
7.5 (7.5)
RNHI35
55 (43)
15 (10)
51 (40)
15 (10)
47 (37)
10 (10)
43 (33)
10 (10)
RNHI50
78 (78)
20 (20)
73 (73)
20 (20)
67 (67)
15 (15)
61 (61)
15 (15)
RNHI75
118 (96)
25 (25)
110 (90)
25 (25)
102 (83)
25 (20)
92 (75)
20 (20)
RNHI125
197 (164)
40 (40)
183 (152)
40 (30)
170 (142)
40 (30)
155 (129)
30 (25)
For typical applications where an aftercooler is installed upstream
1 Capacity @ 100°F (38°C) inlet temperature, 100°F (38°C) inlet pressure dew point, 100°F (38°C) ambient temperature, 50°F (10°C) outlet pressure dew point, and less than 10 psig (0.7 kg/cm2) pressure drop.
  • • Moisture removal to ISO 8573-1: 2010 Quality Class 6 (50°F) pressure dew point
  • • Certified for quality and safety to UL1995/CSA 22.2 No. 236-95
  • • Environmentally friendly R-134a and R-407c refrigerants
  • • Stainless steel brazed plate heat exchangers with integral demister separator ensure optimal heat transfer for the life of the dryer
  • • Widely spaced Inlet/Outlet connections, flow direction stamped into cabinet, for ease of installation and filter mount
  • • Adjustable timed electric drain – valve open and closed time – reliably discharges condensate from the dryer
  • • Instrumentation with lighted compressor On/Off switch, dew point temperature indicator and fault light
  • • Top mount fan, upward condenser air flow allows installation in tight spaces
  • • Bottom base rail with pre-drilled mounting holes for secure floor mount
  • • Quick release front panel for ease of access to dryer internals for routine maintenance

Options
  • Add -FP to any model to include the Filter Pack. Filter Pack consists of the following: (1) FS-Curtis CF7 Particulate Filter and (1) FS-Curtis CF5 Oil Coalescing Filter. Maximum temperature for air entering the filters should not exceed 150°F (66°C).

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