Product Overview

The Flow Switch NKFS Series is designed for liquid flow monitoring and switch output in industrial pipelines. Featuring a robust mechanical structure and stable operating performance, it is suitable for monitoring cooling and lubrication systems in compressors, motors, generators, rolling mills, conveyors, and other industrial equipment.

When the flow rate rises above or falls below the preset switching point, the flow switch outputs a control signal for process monitoring or equipment protection. The switching point can be adjusted anywhere within the measurement range without interrupting pipeline operation, making installation and maintenance more convenient.

The NKFS Series adopts a conical measuring tube and magnetic coupling measurement system. As fluid flows through the tapered tube, the measuring target moves according to the flow rate. The displacement is balanced by an elastic restoring force and transmitted to the indicator through a magnetic coupling system, enabling reliable flow indication and switch control.

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Why Choose the Flow Switch NKFS Series?

Selecting the appropriate flow switch helps improve equipment protection and process reliability. The NKFS Series offers the following advantages:

• Mechanical flow monitoring with magnetic coupling transmission
• Adjustable switching point without stopping system operation
• Suitable for both horizontal and vertical installation
• Rugged construction for industrial environments
• Wide measurement range for various applications
• Multiple material options available
• Clear flow indication with rotating pointer and graduated scale
• Designed for long-term monitoring of cooling and lubrication systems

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Working Principle

The Flow Switch NKFS Series uses a conical measuring tube and a measuring target to monitor liquid flow.

As liquid passes through the tapered tube, the flow force moves the measuring target. The target displacement is balanced by an elastic restoring mechanism and transferred to the indicating system through a magnetic coupling. When the flow reaches the preset switching point, the switch outputs a control signal for monitoring or automation purposes.

The switching point can be adjusted directly on the indicator without interrupting pipeline flow.

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Product Features

• Streamlined and durable mechanical structure
• Magnetic coupling measurement system
• Adjustable switch point without interrupting flow
• Vertical or horizontal installation
• Multiple material selections
• Wide flow measurement range
• Clear flow indication with rotating pointer and graduated scale
• Suitable for industrial liquid flow monitoring

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Product Applications

The Flow Switch NKFS Series is widely used for liquid flow monitoring in:

• Compressor cooling systems
• Lubrication systems
• Electric motors
• Generators
• Rolling mills
• Conveyor systems
• Industrial machinery
• General process automation

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Technical Specifications

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Indicator Options

NKFS-1 to NKFS-3

NKFS-1, NKFS-2, and NKFS-3 flow switches are available with Type I or Type II indicators.

Features include:

• Circular dial with pointer indication
• Multiple engineering units including L/h, L/min, and m³/h
• Easy visual monitoring of flow rate
• Switch alarm point adjustable without interrupting pipeline flow

NKFS-4

The NKFS-4 uses a Type II indicator as standard.

Features include:

• 1/10 scale division corresponding to the measurement range
• Simple and intuitive flow indication
• Convenient adjustment of the alarm switching point without stopping system operation

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Typical Application Example

In industrial cooling systems, maintaining sufficient coolant flow is essential for protecting equipment from overheating. The NKFS Series Flow Switch can be installed in the cooling circuit to continuously monitor liquid flow. If the flow rate drops below the preset value due to pump failure, filter blockage, or pipeline restrictions, the switch outputs an alarm or shutdown signal, helping protect compressors, motors, or other critical equipment.

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Frequently Asked Questions

Can the switching point be adjusted without stopping production?

Yes. The NKFS Series allows the switch point to be adjusted within the measurement range without interrupting pipeline flow.

What installation orientations are supported?

The flow switch supports both horizontal and vertical installation.

What industries is the NKFS suitable for?

It is commonly used in cooling systems, lubrication systems, compressors, generators, rolling mills, conveyors, and other industrial equipment requiring liquid flow monitoring.

Does the NKFS provide a visual flow indication?

Yes. The rotating pointer and graduated scale allow operators to observe the current flow condition directly.

Product dimensions

Selection Table

1/ For other communication devices, please consult with an engineer for explosion-proof requirements, high temperature requirements, and material corrosion resistance requirements before ordering.
2. Customization is also available for those with special requirements in terms of form, pressure resistance, and protection level.