Thermon MIQ Mineral Insulated Heating Cable v.2 - Manual (Page 7)

INSTALLATION PROCEDURES
Installation on Valves and Pumps . . .
1. Install heating cable in accordance with Illustrations F and
G below. Secure heating cable to piping using stainless
steel tie wire or banding.
2. Additional cable is required to provide extra heat at
valves, pumps and miscellaneous equipment to offset the
increased heat loss associated with these items. Refer to
Table 2 for estimated cable requirements for installation on
typical valves and pumps.
3. Install heating cable on valves and pumps utilizing a
looping technique (this allows the valve or pump to be
removed if required). Do not cross cable.
4. Minimum bend radius is 6X cable O.D. Do not exceed
bend radius when completing installation.
5. In potentially explosive areas, it is recommended to secure
MIQ cable with stainless steel banding at all flanges, valves
or any other irregular shaped equipment.
Illustration G: Typical Pump Detail . . .
Heating Cable Serpentined on Valve
Heating Cable Serpentined on Pump
MIQ Heating
Cable
MIQ
Heating Cable
Stainless Steel Tie
Wire or Banding
Illustration F: Typical Valve Detail . . .
Stainless Steel Tie
Wire or Banding
NOTE: Individual MIQ cable set
recommended for pumps.
Table 2: Valve and Pump Allowances
Notes. . .
1. The valve allowance given is the total amount of additional cable to be installed on the
valve. If multiple tracers are used, total valve allowance may be divided among the in-
dividual tracers. The total valve allowance may be alternated among tracers for multiple
valves in a heat trace circuit.
2. Allowances are for 150 pound valves. More cable is required for higher rated valves.
3. Refer to heat trace isometric drawing for project specific allowances.
Pipe Size
in (mm)
Valve Type Pump Type
Screwed
or Welded
ft (m)
Flanged
ft (m)
Butterfly
ft (m)
Screwed
ft (m)
Flanged
ft (m)
½ (12) .5 (.15) 1 (.30) 0 1 (.30) 2 (.61)
¾ (19) .75 (.23) 1.5 (.46) 0 1.5 (.46) 3 (.91)
1 (25) 1 (.30) 2 (.61) 1 (.30) 2 (.61) 4 (1.22)
1¼ (32) 1.5 (.46) 2 (.61) 1 (.30) 3 (.91) 4.5 (1.37)
1½ (40) 1.5 (.46) 2.5 (.76) 1.5 (.46) 3 (.91) 5 (1.52)
2 (50) 2 (.61) 2.5 (.76) 2 (.61) 4 (1.22) 5.5 (1.68)
3 (80) 2.5 (.76) 3.5 (1.07) 2.5 (.76) 5 (1.52) 7 (2.13)
4 (100) 4 (1.22) 5 (1.52) 3 (.91) 8 (2.44) 10 (3.05)
6 (150) 7 (2.13) 8 (2.44) 3.5 (1.07) 14 (4.27) 16 (4.88)
8 (200) 9.5 (2.90) 11 (3.35) 4 (1.22) 19 (5.79) 22 (6.71)
10 (250) 12.5 (3.81) 14 (4.27) 4 (1.22) 25 (7.62) 28 (8.53)
12 (300) 15 (4.57) 16.5 (5.03) 5 (1.52) 30 (9.14) 33 (10.06)
14 (350) 18 (5.49) 19.5 (5.94) 5.5 (1.68) 36 (10.97) 39 (11.89)
16 (400) 21.5 (6.55) 23 (7.01) 6 (1.83) 43 (13.11) 46 (14.02)
18 (450) 25.5 (7.77) 27 (8.23) 6.5 (1.98) 51 (15.54) 54 (16.46)
20 (500) 28.5 (8.69) 30 (9.14) 7 (2.13) 57 (17.37) 60 (18.29)
24 (600) 34 (10.36) 36 (10.97) 8 (2.44) 68 (20.73) 72 (21.95)
30 (750) 40 (12.19) 42 (12.80) 10 (3.05) 80 (24.38) 84 (25.60)
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