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Sight Flow Indicator with Rotor
Sight Flow Indicator with Rotor is a flanged inline flow indicator with dual viewing windows and a stainless steel rotor. The rotating rotor provides a simple visual indication of flow, while borosilicate glass windows allow operators to observe the process medium directly.
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Technical data
Sight Flow Indicator with Rotor for Reliable Visual Flow Monitoring
The Sight Flow Indicator with Rotor is a mechanical visual flow monitoring device installed directly in process pipelines. It allows operators to quickly observe whether the process medium is flowing while simultaneously viewing the condition of the medium through two transparent sight windows.
As the process fluid passes through the indicator body, the 316 stainless steel rotor rotates with the flow, providing an immediate visual indication of flow presence and direction. Unlike electronic flow sensors, the rotor-type design requires no electrical power, wiring or instrumentation, making it a practical solution for process lines where simple and reliable visual monitoring is required.
The LMX 880-XR series is designed with a dual-window flanged construction and can be manufactured according to ANSI/ASME B16.5 flange standards. The standard configuration uses a 316/316L stainless steel body, tempered borosilicate glass and PTFE sealing, while alternative materials such as carbon steel, duplex stainless steel, graphite, FKM and FFKM are available depending on the application.
The sight flow indicator can be supplied in different nominal sizes and pressure classes to meet specific pipeline requirements. Optional flapper or drip-nose indicators are also available for applications where very low flow rates need to be detected.
Typical applications include chemical processing, petrochemical plants, oil and gas systems, pharmaceutical processing, water treatment, power generation, offshore and marine equipment, as well as pump discharge and transfer lines.
For customized requirements, customers can specify the pipeline size, pressure class, operating temperature, process medium, flange standard, body material, glass material and sealing material. Our engineering team can then recommend a suitable configuration and provide a technical drawing for approval.
Technical Data
| Parameter | Specification |
|---|---|
| Product Type | Sight Flow Indicator with Rotor |
| Model | LMX 880-XR |
| Design | Flanged, Dual-Window |
| Nominal Size | DN15–DN200 / ½”–8″ |
| Flange Standard | ANSI / ASME B16.5 |
| Pressure Class | Class 150 / Class 300 |
| Flange Facing | RF Standard, RTJ Optional |
| Standard Body | 316 / 316L Stainless Steel |
| Optional Body | Carbon Steel, 304/304L SS, Duplex 2205, Hastelloy, Titanium |
| Rotor Material | 316 Stainless Steel |
| Standard Glass | Tempered Borosilicate Glass |
| Glass Standard | DIN 7080 |
| Glass Temperature | Up to approx. 280°C* |
| Standard Gasket | PTFE |
| Optional Gasket | Graphite, FKM, FFKM |
| Flow Indication | Rotor / Flapper / Drip-Nose |
| Connection | Flanged |
| Testing | Hydrostatic Test |
| Material Certificate | EN 10204 3.1 |
| Applications | Liquid, Gas and Process Media |
| Customization | Available |
Materials
Body Materials
| Material | Typical Application |
|---|---|
| 316 / 316L Stainless Steel | Chemical, pharmaceutical and general corrosive service |
| 304 / 304L Stainless Steel | General industrial applications |
| Carbon Steel | General process and hydrocarbon service |
| Duplex 2205 | Offshore and chloride-containing environments |
| Hastelloy / Titanium | Highly corrosive or special process media |
Glass & Sealing Materials
| Component | Standard | Optional |
|---|---|---|
| Sight Glass | Borosilicate DIN 7080 | Soda-lime / Special glass |
| Gasket | PTFE | Graphite / FKM / FFKM |
| Rotor | 316 SS | — |
Dimensions (ASME B16.5, ½” – 8″)
| Size | D Cl.150 | D Cl.300 | BL | d₁ | d₂ | S 16bar | S 40bar |
|---|---|---|---|---|---|---|---|
| ½” | 89 | 95.2 | 130 | 32 | 45 | 10 | 10 |
| ¾” | 98 | 117.3 | 150 | 32 | 45 | 10 | 10 |
| 1″ | 108 | 123.8 | 160 | 48 | 63 | 10 | 15 |
| 1½” | 127 | 155.6 | 200 | 65 | 80 | 12 | 20 |
| 2″ | 152 | 165.1 | 230 | 80 | 100 | 15 | 25 |
| 3″ | 191 | 209.6 | 310 | 100 | 125 | 20 | 30 |
| 4″ | 228 | 254.0 | 350 | 125 | 150 | 25 | 32 |
| 6″ | 279 | 317.5 | 480 | 175 | 200 | 30 | o.r. |
| 8″ | 343 | 381.0 | 600 | 175 | 200 | 30 | o.r. |
KEY FEATURES
Dual-Window Visual Monitoring
Two borosilicate glass windows provide clear observation of the process medium and rotor movement.
316 Stainless Steel Rotor
The corrosion-resistant 316 SS rotor provides a simple and reliable visual indication of flow.
Power-Free Flow Indication
Mechanical rotor operation requires no electrical power, sensors or additional instrumentation.
ASME B16.5 Flanged Connection
Available with ANSI/ASME B16.5 Class 150 and Class 300 flanges for industrial pipeline installation.
Customizable Materials
Body, glass, gasket and coating materials can be selected according to pressure, temperature and media requirements.
Multiple Flow Indication Options
Rotor, flapper and drip-nose configurations are available for different flow conditions and applications.
Custom Manufacturing Service
We provide tailor-made solutions according to drawings or technical requirements.
- Custom diameter
- Custom thickness
- Special pressure design
- Edge polishing
- Optical finishing
- OEM / ODM support
- Custom packaging
TYPICAL APPLICATIONS
- Pressure Vessels
- Chemical Reactors
- Boilers & Steam Systems
- Pipeline Sight Glass Assemblies
- Pharmaceutical Equipment
- Food & Beverage Processing
- Industrial Observation Ports
FAQ
A:A sight flow indicator with rotor is an inline pipeline device that allows operators to visually monitor process flow. A rotor inside the body rotates when the medium passes through it, providing a simple visual indication of flow.
A:A standard sight glass mainly provides a viewing window for observing the process medium. A sight flow indicator adds a mechanical indicator such as a rotor, flapper or drip-nose to provide visual confirmation of flow.
A: No. The rotor is driven directly by the process medium, so the standard design requires no electrical power or external instrumentation.
A: The standard body is 316/316L stainless steel. Carbon steel, 304/304L stainless steel, duplex stainless steel and special alloys such as Hastelloy or titanium can also be supplied depending on the application.
A: The standard flanged design can be supplied according to ANSI/ASME B16.5 Class 150 and Class 300. Other pressure requirements can be evaluated according to the application.
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