Liquid Level Gauges
BLN Series — Tubular Level Gauge
BLNT threaded · BLNF flanged · Without protection support
For observing liquid level, fluid colour and interfaces in normally non-pressurised, non-dangerous fluid systems. Choose a threaded or flanged connection and configure the gauge for your application. Gauge valves are sold separately.
BLNT / BLNFTechnical 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
- FEP 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
- Teflon FEP only
- Protection support
- None
- Viton seals
- −20 to 150°C
- EPDM seals
- −40 to 110°C
- PTFE seals
- −100 to 100°C
No protection support or scale plate. With or without ball check. Optional yellow float; request it with your enquiry.
Dimensions and mounting
For thread type, please use unions to install the level gauge on the tank.
(Not provided)
| Thread size | ¾ in |
|---|---|
| H (mm) | 69 |
| H1 (mm) | 47 |
| Drain | ⅜ in |
| FEP OD × wall (mm) | Ø19 × 1.6t |
Use customer-supplied unions for threaded installation. G, NPT and BSPT male or female threads are available on request. A ¾ in NPT male connection uses a ⅜ in NPT female drain. An adapter to ½ in NPT male is available on request.
| Flange size | ¾ in | 1 in |
|---|---|---|
| H (mm) | 69 | 69 |
| H1 (mm) | 59 | 59 |
| Drain | ⅜ in | ⅜ in |
| FEP OD × wall (mm) | Ø19 × 1.6t | Ø19 × 1.6t |
JIS, ANSI and DIN flange ratings are available on request.
Ordering information
Select BLNT or BLNF, then choose the connection and materials. Gauge valves are sold separately.
Ordering code follows the datasheet sequence. Code O denotes an optional flange connection; specify the required details with your quote request. Centre-to-centre length is in millimetres.
Specifications are general selection guidance. Confirm materials, connection standards, operating temperature and pressure with Sightflow before placing an order.