Page 1
“T” TYPE AIR PROCESS HEATERS
For In-Line Air and Gas Heating
AHP Series
U 3⁄8, 1⁄2 or 3⁄4" Diameters
U Exit Air or Gas
Temperatures
to 540°C (1000°F)
U Inlet Air or Gas
Temperatures
to 121°C (250°F)
U For Horizontal Mounting
U With or Without
NPT Fittings*
APPLICATIONS
The AHP Series in-line air heaters
are used to heat clean, dry air or
gas for baking, drying, laminating,
metal working, packaging, plastic
welding, preheating, sealing,
soldering, shrink fitting and synthetic
fabric sewing.
AHP series air process heaters
provide hot air and gas up to 540°C
AHP-3741 shown smaller
than actual size.
(1000°F) with infinite control by
varying the voltage and/or the air
flow. Closed loop control can also
be achieved with temperature
controllers and “T” fittings to mount
thermocouples. Calculate the flow
rate, temperature rise, or power
requirement as follows:
Watts = SCFM x ∆T / 3
SCFM = Standard Cubic Feet
Per Minute
∆T = Temperature Rise in
Degrees F from the
Inlet to the Outlet
Maximum flow rates are given in
the table below. For minimum flow
rates, see table on page 120.
To Order Visit omega.com/ahp_series for Pricing and Details
Model Heated Length Watts/ Maximum Diameter NPT Weight
Number Volts Watts mm (inch) Inch† CFM mm (inch) Fitting g (lb)
120 Vac Models
AHP-3741 120 200 89 (3
AHP-5051 120 400 114 (4
AHP-7561 120 750 140 (5
120/240 Vac Models**
AHP-3742 120 50 89 (3
240 200 89 (31⁄2) 57 8
AHP-5052 120 100 11 (4
240 400 11 (41⁄2) 80 10
AHP-7562 120 190 14 (5
240 750 14 (51⁄2) 136 20
* Note: To order heaters without NPT fittings add suffix “-NF” to model number, price for heaters without fittings is an additional cost for
AHP-374 Series, for AHP-505 Series, and for AHP-756 Series.
** These air heaters can be operated on either 120 or 240V. Specifications are shown for operation on both 120 and 240V.
†
Indicates watts per inch of heated length. Use the table above to determine minimum required flow rates. The watts per inch of heated length
can be changed by reducing the operating voltage or by ordering a custom made heater.
Ordering Example: AHP-3741/120, 200 W, 120 Vac “T” Type in-line air/gas heater.
To Order, Call or Shop Online at omega.com
1
⁄2) 57 8 10 (3⁄8)
1
⁄2) 88 10 13 (1⁄2)
1
⁄2) 136 20 19 (3⁄4)
1
⁄2) 14 8 10 (3⁄8)
1
⁄2) 22 10 13 (1⁄2)
1
⁄2) 34 20 19 (3⁄4)
1
⁄4" 82 (0.18)
3
⁄8" 113 (0.25)
3
⁄4" 308 (0.68)
1
⁄4" 82 (0.18)
3
⁄8" 113 (0.25)
3
⁄4" 308 (0.68)
SM
119
Page 2
ARTWORK/PRODUCT ART/ HEATERS/H-AHP TC
ARTWORK/PRODUCT ART/ HEATERS/H-AHP CONST.
Hot Air
Exit
Cold Air
Entry
6
7
5
8
5
10
49
1 2 3
5
ARTWORK/PRODUCT ART/ HEATERS/H-AHP DIM.
52
Dimensions: mm (inch)
Pressure Drop vs. Air Flow
10.0
HOT AIR
EXIT
13
(0.50)
D
Heated Length
L ±1.6 (0.06)
A (NOM.)
B (NOM.)
7.5
5.0
Pressure Drop (psig)
2.5
0
0
3/8"
1/2"
5101
Air Flow (SCFM)
Dimensions: mm (inch)
Heated
Series Diameter Length L A B
AHP-374 9.5 (3⁄8) 88.9 (31⁄2) 101.6 (4) 7.9 (5⁄16) 33.3 (15⁄16)
AHP-505 12.7 (
AHP-756 19.1 (
1
⁄2) 114.3 (41⁄2) 127.0 (5) 34.9 (13⁄8) 19 (13⁄4)
3
⁄4) 139.7 (51⁄2) 152.4 (6) 61.9 (27⁄16) 41.3 (15⁄8)
SPECIFICATIONS
Pressure Rating: 80 psig
Wattage Tolerance: +5, -10% or better
at the voltage specified
Leads:
0.3 m L (1') fiberglass insulated leads
Maximum Watts Per Linear Inch of Heated Length
Minimum CFM Required
3
⁄8" Diameter
1 60 80 120
2 60 80 120
4 100 100 120
6 150 150 150
8 200 200 200
10 - 250 250
15 - - 375
20 - - 500
1
⁄2" Diameter
3
⁄4" Diameter
3/4"
0
Dimensions:
AHP-NPT34
mm (inch)
25.4
11.1
(0.44)
3
4
/
" NPT
Male Pipe
Thread
15.9
(0.63)
120
To Order, Call or Shop Online at omega.com
(1)
12.7
(0.50)
1
4
/
" NPT Female
Pipe Thread
38.1
(1.50)
Sensor Adaptor
Fitting for Thermocouples
34.9
(1.38)
3
4
/
" Female
Pipe Thread
1. Optional stainless steel
bushing
2. Ceramic coil support
3. Resistance element
4. Stainless steel sheath
5. Silver solder
Air Heater
Construction
6. Fiberglass insulated leads
7. Epoxy seal
8. Copper tee
9. Heliarc weld
10. Optional brass bushing
Thermocouple T-Fitting
The AHP-NPT34 fitting can be used with subminiature
thermocouple probes (see omega.com) and with stainless
steel compression fittings (model SSLK-18-14) to monitor
temperature at the outlet of the AHP-756 Series heaters.
Ordering Example: AHP-NPT34, thermocouple t-fitting.
Model Number
AHP-NPT34
SM
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