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Parker Hannifn Corporation
Parfex Division
Ravenna, OH
Light Steam Trace Performance Chart
Part
Number
Process
Tube O.D. (in.)
Tracer Tube
O.D.
(in.)
Heat Loss
(BTU/hr ft-°F)
(DT = 100°F)
Temperature Run Length
(ft.)
Correction Factors
Light Trace – Single Process Tube
LT-20435A-10430
1/4
1/4
10.9
1
1
LT-20635A-10430
3/8
1/4
10.9
0.97
0.9
LT-20835A-10430
1/2
1/4
10.9
0.95
0.8
LT-20635A-10632
3/8
3/8
13.7
–
–
LT-20835A-10632
1/2
3/8
13.7
1.07
1.44
Light Trace – Dual Process Tube
LT-20435B-10430
(2) 1/4
1/4
10.9
–
–
LT-20635B-10430
(2) 3/8
1/4
10.9
–
–
LT-20835B-10430
(2) 1/2
1/4
10.9
–
–
LT-20635B-10632
(2) 3/8
3/8
13.7
1
1
LT-20835B-10632
(2) 1/2
3/8
13.7
0.98
0.9
P
T
Q
LT—Light Steam Trace
®
performance graphs are based upon a 1/4” process tube and a 1/4” tracer tube. Temperature and run length correction
factors for other sizes can determine using the chart provided.
lbs
Part
Number
Process Tube
O.D. (in.)
Tracer Tube
O.D.(in.)
Nominal
Product O.D.
(in.)
Product
Weight
(lbs./ft.)
Minimum Bend
Radius
(in.)
Horizontal/
Vertical
Support
Centers (ft.)
Slope
Welded
Stainless*
Copper
Light Trace-Single Process Tube
LT-20435A-10430
1/4
1/4
1.3
.385
10
5-6' 10-15'
1" in 8'
LT-20635A-10430
3/8
1/4
1.4
.453
12
5-6' 10-15'
1" in 6'
LT-20835A-10430
1/2
1/4
1.5
.519
14
5-6' 10-15'
1" in 3'
LT-20635A-10632
3/8
3/8
1.5
.531
12
5-6' 10-15'
1" in 7'
LT-20835A-10632
1/2
3/8
1.6
.598
14
5-6' 10-15'
1" in 6'
Light Trace-Dual Process Tube
LT-20435B-10430
(2) 1/4
1/4
1.3
.473
14
5-6' 10-15'
1" in 8'
LT-20635B-10430
(2) 3/8
1/4
1.5
.599
15
5-6' 10-15'
1" in 6'
LT-20835B-10430
(2) 1/2
1/4
1.6
.778
16
5-6' 10-15'
1" in 3'
LT-20635B-10632
(2) 3/8
3/8
1.6
.675
16
5-6' 10-15'
1" in 7'
LT-20835B-10632
(2) 1/2
3/8
1.7
.803
18
5-6' 10-15'
1" in 6'
*Available in seamless stainless steel and other alloys
P
T
lbs
Installation Guide— Light Steam Trace
Catalog Number 4200-M-2
Chemical Processing and Refneries