Mechanical adjustable differential pressure switch NT41

Product Overview

The Mechanical adjustable differential pressure switch NT41 is a reliable industrial pressure control device designed for automatic pressure monitoring and switching in hydraulic, pneumatic, steam, and process control systems.

The controller utilizes diaphragm, bellows, piston, and spring tube pressure sensing elements to provide accurate and dependable pressure control across a wide pressure range. It is available in both standard and explosion-proof versions, making it suitable for ordinary industrial environments as well as hazardous locations requiring explosion protection.

The adjustable pressure setting range of -0.1 MPa to 40 MPa enables the controller to meet various industrial pressure control requirements. With a maximum working pressure of 1.5 times the measuring range, the controller provides excellent operational reliability and safety.

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Operating Principle

The Mechanical adjustable differential pressure switch NT41 uses one of several mechanical pressure sensing elements—including a diaphragm, bellows, piston, or spring tube—to detect system pressure.

As the pressure changes, the sensing element deforms proportionally. When the measured pressure reaches the preset switching point, the internal mechanical mechanism actuates the electrical contacts, automatically opening or closing the control circuit.

This mechanical switching principle enables reliable automatic pressure control without requiring electronic pressure sensors.

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Product Features

• Mechanical pressure sensing design
• Diaphragm, bellows, piston, and spring tube sensing elements
• Automatic pressure control
• Adjustable pressure setting
• Wide pressure adjustment range
• Available in standard and explosion-proof models
• Suitable for gas, liquid, and steam media
• Reliable switching performance
• High overload capability
• Long service life
• Stable operation in industrial environments
• Suitable for hazardous area applications (Explosion-proof model)

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Explosion-Proof Version

The explosion-proof model is designed for hazardous environments containing explosive gas mixtures.

Explosion-Proof Mark:

Ex d e IIC T6 (Based on the product specification image. Please confirm the certification marking on the product nameplate before publication.)

It is suitable for locations containing Class IIA, IIB, and IIC explosive gas mixtures with T1–T6 temperature groups, provided that the working medium does not corrode the pressure sensing components.

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Product Applications

The Mechanical adjustable differential pressure switch NT41 is widely used in:

• Hydraulic systems
• Pneumatic systems
• Steam systems
• Industrial process control
• Chemical plants
• Petrochemical facilities
• Oil & gas industry
• Power plants
• Mechanical equipment
• Industrial automation
• Hazardous area pressure control
• Explosion-proof process equipment

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Technical Specifications

Pressure Performance

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Suitable Media

The controller is suitable for:

• Gas
• Liquid
• Steam

The media should not corrode the pressure sensing elements.

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Standard & Explosion-Proof Specifications

Note: The specification image shows “10 cycles,” which is almost certainly a formatting omission. It is typically expressed as 10⁶ cycles (1 million operations). Please verify the original technical datasheet before publishing.

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A size chart (mm)

B Type ⸺ Dimensional Drawing (mm)

Product Advantages

The Mechanical adjustable differential pressure switch NT41 combines robust mechanical sensing technology with dependable switching performance. Available in both standard and explosion-proof configurations, it provides reliable pressure control for demanding industrial applications while maintaining excellent durability, repeatability, and safety.

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Typical Applications

The Mechanical adjustable differential pressure switch NT41 is commonly installed in:

• Hydraulic power units
• Industrial compressors
• Steam boilers
• Pump control systems
• Chemical processing equipment
• Petrochemical plants
• Oil & gas installations
• Power generation systems
• Industrial automation equipment
• Hazardous area process control

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Frequently Asked Questions (FAQ)

What pressure range does the controller support?

The controller offers an adjustable pressure setting range of -0.1 MPa to 40 MPa.

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What sensing elements are available?

Depending on the model, the controller may use:

• Diaphragm
• Bellows
• Piston
• Spring tube

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What media can the controller measure?

The controller is suitable for:

• Gas
• Liquid
• Steam

The working medium should not corrode the pressure sensing components.

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Is an explosion-proof version available?

Yes. The controller is available in an explosion-proof model certified for hazardous industrial environments requiring explosion protection.

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What protection level does the controller provide?

Both the standard and explosion-proof versions feature an IP67 protection rating, providing excellent resistance to dust and water ingress.

Why Choose the Mechanical adjustable differential pressure switch NT41 ?

The Mechanical adjustable differential pressure switch NT41 provides dependable automatic pressure control using proven diaphragm, bellows, piston, and spring tube sensing technologies. With a wide pressure adjustment range, IP67 protection, high repeatability, and optional explosion-proof certification, it is an ideal solution for hydraulic systems, steam applications, industrial automation, and hazardous-area process control.