Liquid Level Gauges
BLU Series — Tubular Level Gauge
Flanged · Glass or PVC tube · Optional protection support
For observing liquid level, fluid colour and interfaces in normally non-pressurised, non-dangerous fluid systems. BLU uses flanged valve bodies and can be supplied with a glass or PVC gauge tube. Gauge valves are sold separately.
BLU SeriesTechnical data
Application and operating limits
- Fluids
- Water, oil and other compatible chemical liquids
- Working pressure
- 5–8 kg/cm², depending on configuration
- Working temperature
- 120°C or 150°C, depending on configuration
- Glass centre distance
- Up to 2,500 mm
- PVC centre distance
- Up to 30 m
Pressure and temperature limits depend on length and materials; confirm the combination for the application. Gauge valves are sold separately.
Materials and options
- Valve material
- Stainless steel 304 / 316 or UPVC
- Tube
- DURAN® borosilicate glass or PVC
- Protection support
- Optional for glass; not required for PVC
- Process connection
- ¾ in or 1 in flange; JIS 10K or ANSI 150# FF
- Viton seals
- −20 to 150°C
- EPDM seals
- −40 to 110°C
- PTFE seals
- −100 to 100°C
Dimensions and mounting
| Flange size | ¾ in | 1 in |
|---|---|---|
| Glass OD × wall (mm) | Ø18 × 2.5t | Ø18 × 2.5t |
| PVC OD × wall (mm) | Ø19.8 × 2.4t | Ø19.8 × 2.4t |
Flange ratings are JIS 10K and ANSI 150# flat face. The protection supporter is available for the glass tube and is not required for the PVC tube. Female-thread connection arrangements are available on request.
Ordering information
Choose the BLU connection, tube and materials. Gauge valves are sold separately.
Ordering code follows the manufacturer datasheet sequence. Centre-to-centre length is in millimetres. PVC tube uses no protection support.
Specifications are general selection guidance. Confirm materials, connection standards, operating temperature and pressure with Sightflow before placing an order.