HFS-20 Flow Switch
Paddle type water flow switch for pipeline flow monitoring
Model HFS with adjustable flow control range
Supports automatic pump or valve control systems
Durable ABS housing with metal base structure
Brass or stainless steel threaded connection options
Fast response to water flow changes
Suitable for various pipe sizes and industrial applications
Application
Water circulation systems
Industrial cooling systems
Pump protection systems
Pipeline engineering and water treatment
HVAC water flow monitoring
Description
The HFS-15 paddle type water flow switch is designed for reliable flow monitoring and automatic control in pipeline systems. It detects the presence or absence of liquid flow and triggers switching signals for pumps, valves, or alarm systems. The switch uses a paddle sensing structure that responds quickly to changes in water flow, ensuring stable and accurate operation in various industrial applications.
The device features a durable ABS housing with a robust metal base and brass threaded connections for strong sealing and long service life. The adjustable flow setting allows flexible control according to different pipeline sizes and flow requirements.
Flow Switch Installation Diagram
Detailed Dimension Drawing
Flow Velocity Chart
Pressure Loss Chart
Features
Paddle type sensing structure for accurate flow detection
Adjustable flow activation range for different pipe sizes
Metal base with brass threaded connection for secure installation
Long service life with stable switching performance
Technical Details
Product Type:
Paddle Type Water Flow Switch
Product Model:
HFS-20
Housing Material:
ABS
Base Material:
Iron base with zinc-plated thread
Thread Material:
Brass or stainless steel
Operating Function:
Flow increase / flow decrease detection
Rated Voltage:
125 V / 250 V
Rated Current:
15 A
Power Factor: 1
1
Pipe Size Options:
1 inch 1-1/2 inch 2 inch 2-1/2 inch 3 inch
Flow Activation Range (Approx.):
1 inch: 18 – 50 L/min 1-1/2 inch: 30 – 105 L/min 2 inch: 50 – 155 L/min 2-1/2 inch: 75 – 200 L/min 3 inch: 100 – 260 L/min
Structure Options:
HFS-15A engineering type (iron base) HFS-15B standard type (iron base)
Paddle Quantity Options:
3 paddle plates 5 paddle plates
Accessories
How to choose the thread connection size?
The thread size should be selected according to the pipeline diameter of the installation system. For example: 1/2" pipe → HFS-15 3/4" pipe → HFS-20 1" pipe → HFS-25 Choosing the correct thread size ensures proper installation and accurate flow detection.
Can the flow switch be used for high-temperature media?
Yes, the HFS series flow switch can be used for liquid temperatures up to about 200°C under normal operating conditions. It is suitable for hot water or similar industrial liquids within this temperature range.
Which series should be selected for corrosive media?
The standard HFS series is mainly designed for water or non-corrosive liquids. If the medium is corrosive, it is recommended to choose stainless steel flow switches or corrosion-resistant series designed for chemical or aggressive liquids.
Which series should be selected for outdoor use?
For outdoor installations, it is recommended to select flow switch models with weather-resistant or waterproof housing.
Can we become an ELECALL distributor in our country?
Thanks for your interest in ELECALL. Please contact our sales team to check if your region is open for distribution. If available, we’ll review your information and get back to you after approval.
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