The VF series flow switches contain only one moving part which results in an extremely reliable option for flow sensing applications. All VF series have now been SIL 3 safety rated and can be configured for use with gas or liquid media rated. The VF series utilizes an internal float and magnet assembly that is displaced upon fluid flow, the displacement of the magnetic field relative to an externally fixed reed switch results in opening or closing of the electrical contacts. The inline construction and availability in various end fittings simplify integration of these products into systems.
Features
Key Features & Benefits
Why Choose VF Series Flow Switches?
Exceptional Reliability
- Single moving part reduces mechanical failure points
- Magnetic actuation eliminates direct contact with electrical components
- Designed for consistent performance over long service intervals
Versatile Installation
- Inline design simplifies integration into existing systems
- Supports vertical or all-attitude mounting
- Wide range of connection types and configurations
Built for Harsh Environments
- Erosion-resistant wetted materials including stainless steel and high-purity polymers
- Compatible with aggressive chemicals and ultra-clean processes
Low Pressure Impact
- Optimized internal design minimizes pressure drop
- Ideal for sensitive flow systems requiring stability
Functional Safety Ready
- SIL 3 capable for critical safety applications
- Supports process protection and system shutdown requirements
Specifications
Specifications
| Specification | V12F (liquid) | V8F (gas and liquid) | V13F (liquid) |
| Available Settings | 0.15 to 5.0 GPM | 0.02 to 1.25 GPM | 1.00 to 7.50 GPM |
| Deadband | 0.15 to 0.5 GPM | 10% of Setting | 10% of Setting |
| Repeatability | 0.05 to 0.15 GPM | 5% of Setting | 5% of Setting |
| *Proof Pressure | Material Dependent | Material Dependent | 50 PSIG |
| Operating Temp. Range | 40 to 125 F | 40 to 125 F | 40 to 125 F |
| Finish | Material Dependent | Material Dependent | Material Dependent |
| Media Type | Liquid | Liquid or gas | Liquid |
| Wetted Materials | SS, PVC, PFA | PVDF, PTFE, PFA | PTFE, PFA, TFM, KALREZ and FEP coated S.S |
| Media Connections | 3/8 & 1/2 NPT Compression | 1/4, 3/8, 1/2, 3/4, and 1 Flare Type | 3/8, 1/2, 3/4 Flare Type |
| Electrical Connections | Free Leads | Free Leads | Free Leads |
| Crimp Type Connector | Crimp Type Connector | Crimp Type Connector | |
| Approvals | UL, CE, ISO 13849 | UL, CE, ISO 13849 | ISO 13849 |
| Warranty | 18 Months | 18 Months | 18 Months |
Applications
Applications & Industries
VF Series Flow Switches are widely used across industries where flow verification and equipment protection are critical.
Common Applications
- Cooling system flow verification
- Chemical dosing and delivery systems
- High-purity fluid monitoring
- Pump protection and dry-run prevention
- Gas flow monitoring in process systems
Industries Served
- Semiconductor manufacturing
- Chemical processing
- Water and wastewater treatment
- OEM equipment manufacturing
- Aerospace and defense systems
These switches provide a simple, cost-effective way to detect flow conditions and trigger alarms or shutdowns, helping prevent equipment damage and process failures.
Q & A
VF Series Flow Switches Q & A
Key selection factors include:
- Required flow setpoint range
- Media type (gas vs liquid)
- Material compatibility
- Pressure drop sensitivity
- Mounting orientation and connection type
Matching these factors ensures optimal performance and longevity in your system.
Downloads
VF Series Flow Switches Links:
Flow Switches V8F Series
Flow Switches V12F Series
Flow Switches V13F Series
Download Pressure, Flow, Level and Temperature Products Selection Guide
Call us today at (855) 737-4714 to learn more or fill out our online form and someone will get back to you.