Here is a clear professional and easytounderstand overview ABOUT an Industrial Glass Tube Rotameter
If you need specs sizing guidelines or applicationbased selection just tell me
Industrial Glass Tube Rotameter Overview
A rotameter is a variable area flowmeter used to measure the flow rate of liquids or gases
An industrial glass tube rotameter uses a tapered transparent glass tube and a float that rises or falls depending on flow rate
It is widely used because it is simple accurate lowcost and requires no power
1 How It Works
A rotameter consists of
Tapered glass tube wide at top narrow at bottom
Float usually stainless steel PTFE or plastic
Scale marked along the tube
Operation principle
Fluid enters from the bottom of the tube
The float rises until upward fluid force float weight
The float position corresponds to the flow rate
The reading is taken at the floats widest diameter depending on manufacturer practice
The design provides a linear flow scale for easy reading
2 Construction Materials
Tube
Borosilicate glass standard
Toughened safety glass
Float
Stainless steel
Glass
Ceramic
PTFE for corrosive fluids
End Connections
Flanged ANSIDIN
Threaded
Hose nipples
Body Housing
Aluminum SS or MS powdercoated
3 Applications
Industrial glass tube rotameters are used in
Liquids
Water
Chemicals
Oils
Corrosive fluids with PTFE float
Gases
Air
Nitrogen
Oxygen
Natural gas
Instrument air lines
Used in
Chemical plants
Water treatment systems
Pharmaceuticals
Laboratories
Food beverage
Petrochemical industries
4 Measurement Ranges
Typical ranges
Liquids
10 LPH to 40000 LPH or more depending on design
Gases
05 Nmhr to 100 Nmhr or higher
Ranges depend on
Tube size to 4 typical
Fluid density
Viscosity
Operating pressure temperature
5 Accuracy
Typical accuracy
2 of full scale good quality units
1 for precision models
Repeatability is generally high 05 to 1
6 Advantages
No external power required
Simple visual reading
Low pressure drop
Suitable for corrosive fluids with material options
Costeffective
Linear scale and easy calibration
7 Limitations
Not ideal for opaque fluids
Glass tube can break not suitable for very highpressure systems
Accuracy affected by changing fluid densityviscosity
Must be mounted vertically flow upward only
For highpressure or hazardous service metal tube rotameters are preferred
8 Important Selection Parameters
To choose a correct rotameter you need
Fluid type liquid or gas
Operating conditions
Flow range
Pressure
Temperature
Density viscosity
End connection type
Wetted material compatibility
Desired accuracy
Mounting orientation must be vertical
If you want I can also provide
Typical datasheet template
Selection guidance for your specific flow range
Difference between glass tube and metal tube rotameters
Installation guidelines