Pipe Insert Heater
D2
5
1
/
4
"
appro
x.
1
1
/
8
"
5
1
/
4
"
2
1
/
2
" NPT coupling
welded to the tank
4
1
/
4
"
dia.
P
ipe included
with the heater
T
ypically to heat:
2
1
/
2
“
steel screw plug asphalt, tar, starch,
Requires a 2
1
/
2
” half coupling welded into tank glucose, sugar
Includes pipe well, 2” NPT schedule 40 carbon steel pipe large storage tanks, corrosive liquid
Up to 600 volts
Optional “K” type High Limit Thermocouple
Optional Auto-reset High Limit
Weather Resistant terminal box
(specifiy voltage and 1 or 3 phase when ordering)
5
1
/
4
"
ap
pro
x.
1
1
/
8
"
5
1
/
4
"
4
1
/
4
"
dia.
2
1
/
2
” NPT screw plug mount (pipe included)
Figure 210
Figure 209
k
w immersed pipe
c
atalogue number
length (f
t) watt density Fig. 210 Fig. 210 Fig.210
B dim.
watt/in
2
standar
d with “K” thermocouple with High Limit
1 2 5 SPA-2501MR SPAK-2501MR SPAHL-2501MR
22
1
/
2
8 SPA-2502MR SPAK-2502MR SPAHL-2502MR
33
1
/
2
10 SPA-2503MR SPAK-2503MR SPAHL-2503MR
4 4 11 SPA-2504MR SPAK-2504MR SPAHL-2504MR
5 4
3
/
4
11
SPA-2505MR SPAK-2505MR SPAHL-2505MR
6 5
1
/
2
12
SPA-2506MR SPAK-2506MR SPAHL-2506MR
7 6 12 SPA-2507MR SPAK-2507MR SPAHL-2507MR
8 6
3
/
4
13
SPA-2508MR SPAK-2508MR SPAHL-2508MR
9 7
1
/
2
13 SPA-2509MR SPAK-2509MR SPAHL-2509MR
10 8 13 SPA-2510MR SPAK-2510MR SPAHL-2510MR
11 9
3
/
4
12
SPA-2511MR SPAK-2511MR SPAHL-2511MR
12 9
1
/
2
13
SPA-2512MR SPAK-2512MR SPAHL-2512MR
13 10 14 SPA-2513MR SPAK-2513MR SPAHL-2513MR
Pipe Insert Heaters offer you the advantages
of direct immersion heat, and the ability to
service the heater without draining the tank.
The Incoloy sheathed element inside the pipe
is carefully deigned for this application, and
transfers its heat to the inside pipe wall by
convection and radiation. The large surface
area of the pipe in contact with your liquid
greatly reduces the watt density (watts/in
2
),
making the pipe insert heaters ideally suited
for heating:
• very viscous materials like Bunker C Fuel Oil,
• temperature sensitive materials like
glucose
, liquid sugar
• bulk storage of corrosive material
SPA series pipe heaters come complete
with a mild steel pipe well
Low Liquid Protection
To prevent Low Liquid failure, one of multiple
heaters should have a built-in over heat
protection. This heater must be mounted
slightly higher than other heaters in the tank.
When a Low Liquid event happens the air
temperature inside the pipe rises dramatically.
Low Liquid Protection Options
1. Built in "K" thermocouple option,
ser
ies SPAK.
2. Built in mechanical high limit control,
series SPAHL. Typical temperature setting is
700°F (370°C). The standard control is a
DPST 25amp, 240 VAC. An optional 600 volt,
15 amp TPST control is available.
The built in high limit control has no
contact with the liquid you are heating
and cannot be used as a thermostat to
c
ontrol your tank temperature.
(2 pages)
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