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LIGHT & MEDIUM WEIGHT
OIL APPLICATIONS
Dimensions: inches
Integral Thermostat
NWHMTO Series
3/4" Conduit Opening
1" Pipe Outlet
9-1/4
U 21⁄2 NPT Steel
Screw Plug Design
1
⁄2" Carbon Steel
U 2
Pipe Body, 150 Lb
Construction
U 3 to 9 kW
U 120, 240 and 480V,
1 & 3 Phase
U General Purpose,
Moisture Resistant/
Explosion Resistant
or Moisture Resistant
Terminal Enclosure
U Three 0.475" Dia. Steel
Sheath Elements
(23 W/in
U Integral Thermostat
(200 to 550
2
)
o
F)
U UL, CSA and Other Third
Party Approval, Listing
or Certification Available
APPLICATIONS
Light and Medium Weight Oil:
Low-cost solution to heating
lubricating and cutting oils in
remote applications.
FEATURES
Terminal Enclosure:
E1 General Purpose is standard.
E2 Moisture Resistant/Explosion
Resistant and E4 Moisture Resistant
Enclosures available.
Elements:
Three steel sheath elements.
Screw Plug:
21⁄2 NPT Steel screw plug with 1⁄2"
thermowell for thermostat bulb.
Vessel: Pipe body and nozzles
are ASTM A53B carbon steel pipe.
The end disk is ASTM A516 Grade
70 carbon steel plate. Provided with
thermal insulation and painted
sheet metal jacket.
Wiring:
Convenient field wiring terminals
are provided for easy installation.
Controls: Stock and assembly
stock heaters come equipped
with integral thermostat.
3
2 Mtg. Lugs Ea.
with two 3/8" 16x1-1/2" Deep
Holes on 1-1/4"
Centers
B
A
C
NWHMTO-03-003P-E1/240
1" Pipe Inlet
3/8" NPT Pipe Plug
7
shown smaller
than actual size.
Note — Add 2" to A dimension for E2
Enclosure.
To Order
Dimensions: in
Ckt & Wt.
kW Volts Phase A B C Model No. (lb)
3 240 1-1 34
3 240 1-3 34
3 480 1-1 34
3 480 1-3 34
4.5 240 1-1 34
4.5 240 1-3 34
4.5 480 1-1 34
4.5 480 1-3 34
6 240 1-1 57
6 240 1-3 57
6 480 1-1 57
6 480 1-3 57
7.5 240 1-1 57
7.5 240 1-3 57
7.5 480 1-1 57
7.5 480 1-3 57
9 240 1-1 57
9 240 1-3 57
9 480 1-1 57
9 480 1-3 57
Ordering Example: NWHMTO-03-07P5-E1/240/3P, 7.5 kW, 3 phase, 240V heater,
3
3
3
3
3
3
3
3
1
1
1
1
1
1
1
1
1
1
1
1
22
⁄
4
22
⁄
4
22
⁄
4
22
⁄
4
22
⁄
4
22
⁄
4
22
⁄
4
22
⁄
4
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
45
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
16
⁄
2
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
39
⁄
4
1
NWHMTO-03-003P-E1/240 22
⁄
2
1
NWHMTO-03-003P-E1/240/3P 22
⁄
2
1
NWHMTO-03-003P-E1/480 22
⁄
2
1
NWHMTO-03-003P-E1/480/3P 22
⁄
2
1
NWHMTO-03-04P5-E1/240 22
⁄
2
1
NWHMTO-03-04P5-E1/240/3P 22
⁄
2
1
NWHMTO-03-04P5-E1/480 22
⁄
2
1
NWHMTO-03-04P5-E1/480/3P 22
⁄
2
1
NWHMTO-03-006P-E1/240 40
⁄
4
1
NWHMTO-03-006P-E1/240/3P 40
⁄
4
1
NWHMTO-03-006P-E1/480 40
⁄
4
1
NWHMTO-03-006P-E1/480/3P 40
⁄
4
1
NWHMTO-03-07P5-E1/240 40
⁄
4
1
NWHMTO-03-07P5-E1/240/3P 40
⁄
4
1
NWHMTO-03-07P5-E1/480 40
⁄
4
1
NWHMTO-03-07P5-E1/480/3P 40
⁄
4
1
NWHMTO-03-009P-E1/240 40
⁄
4
1
NWHMTO-03-009P-E1/240/3P 40
⁄
4
1
NWHMTO-03-009P-E1/480 40
⁄
4
1
NWHMTO-03-009P-E1/480/3P 40
⁄
4
Model Light and Medium Weight Oil
NWHMTO Oil Circulation Heater with Screw Plug
Code Number of Elements
03 Three
Ordering
Information
To Order —
Complete the
Model Number
using the Matrix
provided.
Code kW
003P 3 07P5 7.5
04P5 4.5 009P 9
006P 6
Code Terminal Enclosure
E1 General Purpose
E2 Moisture Resistant/
Explosion Resistant
E4 Moisture Resistant
NWHMTO 03 003P E1 Typical Model Number
G-17
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