Sight Flow Indicators
F-Series Flanged Sight Flow Indicators
Flanged process observation with or without a spring paddle
- CE 2810Approval listed
Service and indication
- Gas and liquid service for water treatment and industrial flow systems
- Double-window observation with flow in either direction
- Spring paddle or drip tube without a paddle
Available models
FA Type
Compact body with paddle, 15A–50A.
FB Type - 15A to 50A
Square-cover body with paddle.
FB Type - 65A to 250A
Round-cover body for larger connections.
FB-DP Protection Fence
Protected-glass configuration.
Technical data
Temperature and pressure
- Maximum temperature
- 200°C standard; 300°C option available
- FA 15A-50A
- 10 kg/cm² at 25°C water
- FB / FB-DG / FB-DP 15A-50A
- 15 kg/cm² at 25°C water; 25 or 40 kg/cm² on request
- FB / FB-DG / FB-DP 65A-100A
- 15 kg/cm² at 25°C water
- FB / FB-DG / FB-DP 125A-250A
- 10 kg/cm² at 25°C water
Materials
- Body
- SS316, SS304, SS316L or SS304L
- Paddle and spring
- SS316
- Gauge
- Tempered glass
- Gasket
- Teflon, Gore-Tex, Graphite or Sigma 533
- Optional body
- Duplex stainless steel UNS J92205 for drip-tube models
Dimensions
Dimensions in millimetres.
| Dimension | 15A | 20A | 25A | 32A | 40A | 50A |
|---|---|---|---|---|---|---|
| A | 114 | 114 | 114 | 114 | 130 | 150 |
| B | 130 | 130 | 160 | 160 | 200 | 220 |
| B (option) | 140 | 140 | 140 | 140 | 180 | 220 |
| Dimension | 15A | 20A | 25A | 32A | 40A | 50A | 65A | 80A | 100A | 125A | 150A | 200A | 250A |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 72 | 72 | 72 | 115 | 115 | 129 | 164 | 183 | 212 | 247 | 276 | 345 | 410 |
| B | 130 | 130 | 160 | 200 | 200 | 220 | 270 | 270 | 320 | 380 | 420 | 500 | 730 |
| B (option) | 140 | 140 | 140 | 180 | 180 | 220 | 260 | 260 | 310 | - | - | - | - |
| B (ANSI 300 lb) | 160 | 160 | 160 | - | - | - | - | - | - | - | - | - | - |
250A is available as a drip-tube model only. Duplex stainless steel UNS J92205 is unavailable for 250A.
Options
- SS304 protection fence against external glass damage
- Four-piece external tempered glass protection
Flow range table
Ordering information
Choose your options to build an enquiry reference.
Specifications are general selection guidance. Confirm materials, connection standards, operating temperature and pressure with Sightflow before placing an order.