F301 Liquid, and Gas Rotameter, 3/4" and 1", 2.0-20 to 15-150 LPM

Taiwan-made high-quality liquid rotameter, gas rotameter with easy installation and leak-proof turning process. Adjustable and stable flow, compact design for small spaces, patented dual-pointer, laser-engraved scale, and precision-machined metal float for convenient flow monitoring.

Brand: LORRIC
Adapter size: 1/2" , 3/4", 1"
Body material: PC / PSU
Applicable fluid: Tap water  (PC)
  Acid-base solutions (PSU)
  Gas/Air (F301 Air)
Float material: SS316, Ti, Hastelloy C
Measure accuracy: ± 5% OR
Pressure resistance:
5.0kg/cm²

Catalogue (Liquid) Catalogue (Gas)



Rotameters

The area-type rotameter measures flow by balancing fluid buoyancy and float weight, ideal for direct flow observation. It requires vertical installation with fluid flowing bottom to top. Reading the float position varies by model. Widely used in chemical, pharmaceutical, and food processing industries to monitor liquid or gas flow.
Learn more: How to Read the Float

Rotameters
Patented dual-indicator

Patented dual-indicator

From the user's perspective, LORRIC employs a dual-pointer design to monitor upper and lower limit intervals, enabling users to easily identify the flow status at a glance. Users can simply flick the pointer to instantly set the flow monitoring range.

Laser engraved degree scales

LORRIC precisely calibrates each flow meter at the factory to compensate for float weight variations, ensuring ultimate performance. Unlike competitors using mass printing or stickers, our laser engraving offers both accuracy and durability.

 
Laser engraved degree scales
Guide Rail Design

Guide Rail Design

The guide rail design effectively limits the movement of the float within the pipe, reducing turbulence-induced oscillation or rotation. This design enhances measurement precision by ensuring the float remains aligned along the flow meter's axis, contrasting with models lacking a guide rod which may lead to off-axis float movement and impact flow rate accuracy.

PC for Water, PSU for Chemical Solutions

The flow meter body is available in two materials: transparent PC (Polycarbonate) for tap water, and light yellow PSU (Polysulfone), which is acid, alkali, and electrolyte resistant, suitable for chemicals like sulfuric acid and sodium hydroxide, etc.

PC for Water, PSU for Chemical Solutions
Delicate machining for float

Delicate machining for float

LORRIC leverages 30 years of industry expertise, applying fluid mechanics to refine float design. Using precision CNC machining, each float is crafted with jewelry-like precision, guaranteeing stable monitoring for liquid rotameters, gas rotameters.

The unique turning-processed joint, ensuring smooth installation and insertion

Don't settle for subpar joints! While most are injection-molded, resulting in uneven surfaces due to cooling shrinkage, LORRIC's original turning-processed joints offer unmatched quality. With a flawlessly smooth surface, O-ring seal for safety, and zero leakage, choose LORRIC for superior performance!

The unique turning-processed joint, ensuring smooth installation and insertion
The flat joint surface ensures O-ring seal without leakage

The flat joint surface ensures O-ring seal without leakage

Don't settle for subpar joints! While most are injection-molded, resulting in uneven surfaces due to cooling shrinkage, LORRIC's original turning-processed joints offer unmatched quality. With a flawlessly smooth surface, O-ring seal for safety, and zero leakage, choose LORRIC for superior performance!

Flowmeter scale customization

Chemicals vary in specific gravity, affecting float buoyancy. LORRIC offers tailored customization for specific gravity, eliminating the need for on-site height adjustments.

Flowmeter scale customization

Please place your order according below information

How to place an order for LORRIC flowmeters?
  • Select the ideal flow meter based on your material requirements for each component
  • Please refer to following order example for placing order to LORRIC
Order form
Series F301 PSU F301H PSU F301A PSU
Applicable Fluid Chemical and Non-organic Solvents Chemical and Non-organic Solvents Air
Body Material PSU PSU PSU
Float Material AISI 316 Ti / Hastelloy C PVC / AISI 316 / Ti
Guide Rod Material AISI 316 / Hastelloy C
O-ring Material EPDM / VITON EPDM / VITON EPDM / VITON
Union Nuts Material UPVC UPVC UPVC
Union Nuts Material PP P PP
Guide Rod Bottom Material PP PP PP
Scale Rang(L/min) 2.0 - 20 L/min 40 - 400 NLPM
3.0 - 30 L/min 50 - 500 NLPM
5.0 - 50 L/min 70 - 700 NLPM
8.0 - 80 L/min 100 - 1000 NLPM
10 - 100 L/min
Adapter Size and Adaptor Material
3/4" Male Thread       BSPT       UPVC / PP
NPT UPVC / PP
Female Thread BSPT UPVC / PP
NPT UPVC / PP
Socket CNS UPVC
JIS UPVC
ANS UPVC
DIN UPVC
Butt Weld ISO PPH /PVDF
Socket Weld ISO PPH /PVDF
1" Male Thread BSPT UPVC / PP
NPT UPVC / PP
Female Thread BSPT UPVC / PP
NPT UPVC / PP
Socket CNS UPVC
JIS UPVC
ANS UPVC
DIN UPVC
Butt Weld ISO PPH /PVDF
Socket Weld ISO PPH /PVDF
  • Liquid flow meters are calibrated for 20°C water. Gas flow meters are calibrated for normal conditions. ( 0°C , 1 atm)
  • All adaptors can be manufactured to order, please contact us for price and lead time. Specs: adaptor 1/2" NPT male/ female thread (UPVC / PP / PSU) type is custom made, please contact us for details. Please refer to the chemical resistance chart for understanding if our flowmeters body and parts are acceptable for your solution.
  • Above temperature information is for reference only and may not be applicable for all environments.
  • Above flow rate range and materials is for standard specs. Please choose proper products according to your usage and environment conditions. You are welcome to contact us directly for any requests and advice.
  • Our company refrains from offering model recommendations or suggestions, as diverse industries have unique application scopes and design conditions. We encourage you to select the most suitable model based on your specific design conditions.

Size

 
Adapter Spec A B C D E
1"Male Thread 270 153 58.5 61 69
1"Female Thread 270 153 58.5 61 69
1"CNS 257 153 52 61 69
1"ASTM 257 153 52 61 69
1"JIS 255 153 51 61 69
3/4"Male Thread 256 153 51.5 61 69
3/4"Female Thread 272 153 59.5 61 69
3/4"CNS 260 153 53.5 61 69
3/4"ASTM 254 153 50.5 61 69
3/4"JIS 260 153 53.5 61 69
3/4"DIN 254 153 53.5 61 69
3/4"DIN Thick pipe wall 254 153 51.5 61 69
3/4"JIS MIN 254 153 49.5 61 69
1/2"ASTM 252 153 49.5 61 69
1/2"JIS 250 153 48.5 61 69
1/2"DIN 250 153 48.5 61 69
PP OD33
ID25.2
254 153 50.5 61 69

Installation

Three easy steps! Effortlessly install the rotameter!

Step1
Step1

Ensure the main line is vertically installed and that there is ample space to accommodate the flow meter size.

Step2
Step2

Loosen the upper and lower interfaces, including the nuts, and affix them to the pipe using adhesive until the glue sets.

Step3
Step3

Position the body in the center and secure the upper and lower unions.

Applications

Working with sulfuric acid, caustic soda, or unique specialty chemicals? Explore our tailored specific gravity scale customization services

Diverse chemicals, varying specific gravity. LORRIC offers bespoke specific gravity customization to match your chemical needs. No more on-site manual height adjustments!

Working with sulfuric acid, caustic soda, or unique specialty chemicals? Explore our tailored specific gravity scale customization services

What we customize

  • Different measure unit (LPM, LPH, CMPM and more)
  • Main and secondary scale
  • Different liquid proportion
  • Different gas molecular weights
  • Different measuring ranges
What we customize

Customizing Flow Meter Scales: A Step-by-Step Guide

  • Range of customized flow capacity should be stayed within the capacity of existing products.
  • Customizable capacity will be affected by customization of proportion and viscosity, please contact us directly for this service.
  • To customize too compressed flow scales is not suggested, and leads difficulty of on-site observation
Products you may also like
Related articles