Description
YOKOGAWA VF701 Product Overview
The YOKOGAWA VF701 is a high-performance variable area flowmeter (rotameter) designed for visual flow monitoring and measurement of liquids, gases, and steam in industrial processes. This rugged yet precise flowmeter combines excellent visibility with reliable mechanical performance, making it ideal for a wide range of applications where direct flow observation is beneficial.
Key Features
✔ Clear visibility of flow rate with direct reading scale
✔ All-metal construction for durability in harsh environments
✔ Local indicator with optional transmitter output
✔ Wide range of materials for different process media
✔ Low pressure drop design
Technical Specifications
| Parameter | Specification |
| Model | VF701 |
| Manufacturer | YOKOGAWA |
| Type | Variable Area Flowmeter (Rotameter) |
| Measurement Range | 0.05-150 l/min (water), 0.5-5000 l/min (air) |
| Accuracy | ±1.5% of full scale |
| Repeatability | ±0.5% |
| Maximum Pressure | 6.3 MPa (dependent on model) |
| Maximum Temperature | 200°C (standard), 400°C (high-temp version) |
| Scale Length | 100-250 mm |
| Body Materials | SS316, Hastelloy®, Titanium |
| Float Materials | SS316, Hastelloy®, PTFE-coated |
| Process Connections | 1/4″ to 2″ NPT, flanged options |
| Optional Output | 4-20mA, HART (with transmitter) |
YOKOGAWA VF701
Main Features & Advantages
1. Reliable Flow Indication
Direct visual reading of flow rate
Magnetic coupling for transmitter versions
Stable float movement even with pulsating flows
2. Robust Industrial Design
All-welded metal tube construction
No power required for basic operation
Resistant to vibration and shock
3. Flexible Configuration
Vertical or horizontal installation
Local indication only or with transmitter output
Wide choice of materials for corrosive media
Application Field
Process Industries
✔ Chemical processing – additive dosing
✔ Pharmaceutical – purified water systems
✔ Food & beverage – CIP flow monitoring
Utilities & General Industry
✔ Compressed air systems
✔ Cooling water circuits
✔ Steam distribution networks
Special Applications
✔ High purity gas lines
✔ Corrosive chemical feeds
✔ High pressure hydraulic systems
YOKOGAWA VF701
Related Products
| Model | Description |
| VF702 | Larger scale version |
| VF711 | Plastic body version |
| VF721 | High pressure version |
| ADMAG TI | Magnetic flowmeter |
| UF100 | Ultrasonic flowmeter |
Installation & Maintenance
Installation Guidelines
Vertical installation preferred (flow upward)
Adequate straight runs before/after meter
Proper support for heavy models
Maintenance Recommendations
Periodic visual inspection of float movement
Annual verification of calibration
Float replacement if wear is observed
