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Specifications

Operating temperatures  

• Temperature: 40 to 170°C (104 to 338°F)
• Temperature uniformity:

• First pass uniformity equal to iterative custom systems
• Typical uniformity

• ±20°C (36°F) running open loop
• ±10°C (18°F) with simple feedback control
• As good as ±5°C (9°F) with short zone closed 

loop control

• Typical uniformity performance represented in 

below graph (results vary with applications)

Heated line fittings 

• Fittings: elbow, tee and VCR

®

• Connectors: finger-proof rated 

Control 

• Open-loop

• Variable voltage
• Percent duty cycle (on)

• Thermocouple 0.062 in. (1.6 mm)

Product dimensions (straights) 

• Min. length: 2 in. (51 mm)
• Max. length: 36 in. (914 mm)
• Line diameter: 0.25 in. (6.4 mm) and 0.50 in. (13 mm)
• Outside dimension:

0

20

40

60

80

100

120

140

160

180

Voltage

Weldment Temperature (

°C

)

20

40

60

80

100

120

140

160

180

200

220

240

RELIALINE Red

RELIALINE Blac

k

0.25 in. (6.4 mm) 

Tubing Dia.

0.5 in. (13 mm) 

Tubing Dia.

Straight

1.12 (28.4)

1.39 (35.3)

Elbow/Tee

1.88 L x 2.03 H x 1.99 W 

(47.8 L x 51.6 H x 50.5 W)

2.17 L x 2.14 H x 2.01 W 

(55.1 L x 54.3 H x 51 W)

VCR

®

2.42 L x 2.20 H x 2.32 W 

(61.4 L x 55.8 H x 58.9 W)

2.53 L x 2.57 H x 2.71 W 

(64.2 L x 65.3 H x 68.8 W)

Temperature Coverage/Product Selection

140.0

150.0

160.0

170.0

180.0

190.0

200.0

210.0

220.0

Weldment Temperature (°C)

1

2

5

4

3

8

9

10

VCR2

VCR1

15

14

12

VCR2

T/C 
#1

Elbow

#5

T/C 

#2

T/C 

#3

T/C 

#4

T/C 

#9

T/C 

#10

T/C 

#12

T/C 

#14

T/C 

#15

VCR1 

Elbow

#8

Watlow RELIALINE Red

Competitor A

Competitor B

Electrical  

• Voltage: as required to achieve temperature per

below chart-up to 240V max.

• Amperage: dependent on line length, up to 8A

max. for steady state, 15A max. start up (in-rush)
• Consult factory for exact in-rush current for 

your system

Temperature Uniformity

Duty cycle vs. temperature

0

20

40

60

80

100

120

140

160

180

200

10

20

30

40

50

60

70

80

90

100

Percent Duty Cycle

We

ldm

e

nt

 Te

m

p

e

ra

tur

e

 (

°C

)

Red Power, 240V
Red Power, 120V
Blac

k

 Power, 240V

Blac

k

 Power, 120V

Average Weldment Temperatures at Duty Cycle

Outside Surface
Temperature at 170°C 
Line Temperature

Line Temperature
Variation at 170°C 
Operating Temperature

170.01

170

169.99

169.98

169.97

169.96

169.95

169.94

Min.: 
169.937

110

105

100

95

90

85

80

75

70

65

Min.: 
60.33

Max.: 
113.14

Max.: 
170.015

To be automatically connected to the nearest North American Technical Sales Office:

1-800-WATLOW2 • www.watlow.com • info@watlow.com

International Technical Sales Offices:

Australia,

+61-3-9335-6449 • 

China,

+86-21-3950-9510 • 

France,

+33 (0) 3073-2425 • 

Germany,

+49 (0) 7253-9400-0 • 

Italy,

+39 (0) 2 458-8841 • 

Japan,

+81-3-3518-6630 • 

Korea,

+82-2-575-9804 • 

Malaysia,

+60-3-7980-7741 • 

Me

x

ico,

+52 (442) 217-6235 • 

Shanghai,

+86-21-3950-9504 • 

Singapore,

+65-6777-1266 • 

Spain,

+34 91 675 1292 • 

Sweden,

+46 35-27-11-66 •

Taiwan,

+886-7-288-5168 • 

United Kingdom,

+44 (0) 115-964-0777

colrel-0708.qxd:COL-FFLX-0703  7/9/08  8:18 AM  Page 2

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