Sight Flow Indicators (ST/STC)

Features and Benefits

  • Safe, unbreakable FEP fluoropolymer tube permits visual inspection of conveyed material
  • Allows flow check
  • Aeration/turbulence check
  • Cleanliness check
  • Liquid level indicator
  • Magnetic detector placement
  • Sturdy, will not break in high stress applications-no bulky protective sheaths or supporting rods required
  • Saves space, cuts weight
  • High and low temperature rated
  • Smooth, non-stick surface cleans easily and promotes minimal pressure drop
  • High pressure rating
  • Fitting surface finish exceeds sanitary design standards
  • Will not discolour
  • Unaffected by ultra-violet or sunlight
  • Won't age, won't yellow
  • Non-contaminating, won't add taste or colour

Size Range

1/2" ID through 4" ID.

Material

FEP fluoropolymer tube. Fittings are 316 L stainless steel, sanitary clamp design. For availability of styles other than sanitary please consult us.

Temperature Rating

-100 ° F (-73 ° C) to +400°F (+204 ° C).

Lengths Available

  • 1/2" thru 3" ID 32' maximum
  • 4" ID 20' maximum

Length Tolerance

  • OAL
  • 1/4" (.250) on assemblies to 24"
  • 1/2" (.500) on assemblies 25" to 60"
  • (1% on assemblies over 60")
Sight Gauge/Sight Flow Indicator - Specifications
Size (in.)
Inside Diameter (in.)
Outside Diameter (in.)
Wall Thickness
Operating Pressure (P.S.I) @ 70° F
Burst Pressure 70° F
1/2
0.500
0.700
0.100
200
800
3/4
0.750
0.950
0.125
175
700
1
1.000
1.250
0.125
125
500
1-1/2
1.356
1.610
0.125
105
420
2
1.856
2.100
0.125
72
290
2-1/2
2.356
2.650
0.150
50
200
3
2.856
3.230
0.180
40
160
4
3.856
4.276
0.210
30
120

*Burst pressure ratings at ambient 70°F (21°C).
For applications over 300°F consult factory.

Pressure Correction Factors for all Non-Caged FEP Sight Flow Indicators

Using operating pressure @ ambient with correction factors for elevated temperatures.

70°F
150°F
200°F
250°F
300°F
100%
65%
50%
35%
25%

Example: 1" Sight tube @ 200°F rated @ 125 P.S.I ambient x .50 = 62.5 P.S.I @ 200°F.

Sight Flow Indicators, Dip Tubes, Liquid Level Indicators, Inspection Ports

Features

Ideal for decanting/filling operations. Dip tube or sanitary suction tube. Corrosion resistant, lightweight, non-aging. damage resistant. Ideal for monitoring suction/discharge from pumping stations. Integral sight flow indicator. Many fitting styles are available with various tube lengths (windows) that can be specified. "K" Series Solid tube PVDF (Kynar) metal detector assemblies are available in sizes 1" to 4" ID. Consult us for availability.

Minimum Overall Length

Crimp Style Sanitary Ends 
1/2" and 3/4", ID sight tubes, with mini or full size sanitary ends, and 1" through 3" clamp style sanitary fittings can be manufactured to a minimum overall length as short as 6", however, viewing area will he 1" or less. 4" sight tubes with clamp style sanitary ends can he manufactured to 8" minimum overall face to face with a viewing area of 1" or less.

We suggest a minimum OAL length of 10" for 1/2" through 1 1/2" sizes and 12" OAL for 2" through 4" sizes.