NAGANO KEIKI CD71 Explosion-Protected Differential Pressure Switch

Welcome to Nichiboku's industrial Blog

Introduction

Industrial facilities that operate in hazardous or high-pressure environments rely on highly reliable instrumentation to maintain safety and efficiency. The NAGANO KEIKI CD71 Explosion-Protected Differential Pressure Switch is designed precisely for such demanding applications. With its robust construction, flameproof design, and ability to handle both low differential pressure and high system pressures, the CD71 delivers dependable performance across a wide range of industries.

Introducing the CD71 Differential Pressure Switch by Nagano Keiki, designed with explosion protection for robust industrial applications, combining high proof pressure and versatility.

---

Key Features of the NAGANO KEIKI CD71 Explosion-Protected Differential Pressure Switch

High Proof Pressure (8 MPa)

The CD71 is engineered with a reinforced pressure-receiving structure that enables it to withstand 8 MPa of proof pressure, making it suitable for systems where high-pressure process fluids are present.

Explosion-Protected Construction (Ex d ⅡB + H₂ T4)

Designed for hazardous environments, the CD71 features an explosion-protected housing suitable for plants where flammable gases or vapors are present—ensuring operator safety and system integrity.

Wide Differential Pressure Range

Available in multiple ranges from 0–25 kPa to 0.2–1 MPa, the CD71 provides flexibility for applications including low differential pressure detection and heavy-duty industrial monitoring.

Front-Facing Operation & Compact Body

The switch is designed for easy front-side adjustment, enhancing maintenance efficiency. Its compact footprint saves space and supports easier integration into equipment or panel-mounted systems.

Corrosion-Resistant Coating

With an acid-resistant coating applied to the exterior, the CD71 maintains long-term durability even in harsh or corrosive industrial environments.

Multiple Installation Options

Supporting both panel mounting and 2B pipe mounting, the CD71 adapts well to plant layout constraints and existing system configurations.

Typical Applications

The CD71 differential pressure switch is ideal for:

• Monitoring liquid level in sealed tanks

• Detecting strainer clogging in pipelines

• Overpressure and differential pressure alarm systems

• Oil & gas plants, chemical processing facilities, and flammable gas environments

• High-pressure process monitoring in demanding industries
  

Advantages of Implementing the CD71

Before (Conventional Devices)	After (CD71 Implementation)
Limited explosion protection	Full flameproof construction (Ex d ⅡB + H₂ T4)
Low pressure tolerance	High proof pressure up to 8 MPa
Restricted differential ranges	Wide pressure range options
Bulky design, difficult maintenance	Compact body, front-side adjustment
Vulnerable to corrosion	Corrosion-resistant coating

Selection Guidance

To ensure optimal performance when selecting the CD71 differential pressure switch:

1. Identify the fluid type and hazardous environment classification.

2. Select the proper differential pressure range, ideally with normal operating differential pressure falling between 30–65% of the rated range.

3. Confirm installation method (panel-mounted or 2B pipe).

4. Evaluate environmental conditions, especially exposure to corrosive or salt-rich atmospheres.
   

Conclusion

The NAGANO KEIKI CD71 Differential Pressure Switch combines durability, high pressure tolerance, flameproof construction, and flexible configuration options. It is a trusted solution for pressure monitoring, level detection, and safety applications across critical industrial sectors.

If your facility requires reliable pressure monitoring under hazardous conditions, the CD71 offers proven performance backed by Japanese engineering excellence. Go to the official catalog:

Nichiboku Worldwide Supply Support

Nichiboku Ltd. provides global supply support for Japanese industrial products, ensuring reliable distribution and after-sales assistance worldwide.

➡️ Get global supply support ➡️ Inquire about international shipping and product availability ➡️ Partner with Nichiboku for worldwide industrial solutions

---

Contact Us