Differential Pressure Gauges CYW-152B and CYW-153B: Reliable Field Components for Process Differential Pressure Measurement

In the design and implementation of industrial projects such as chemical, power, and nuclear power processes, system integrators and engineering contractors often face challenges such as strong media corrosivity, severe operating vibrations, and limited installation space. These factors can lead to corrosion failure, setpoint drift, or installation compatibility issues in traditional differential pressure measurement devices. The Nexisense stainless steel differential pressure gauge CYW-152B and CYW-153B series utilize an all-stainless steel structure and a double bellows measurement system to provide a stable, corrosion-resistant local indication solution for process control, facilitating rapid integration with three-valve manifolds, PLCs, and SCADA systems.

Through precise differential pressure signal indication, this series of instruments supports flow calculation and process parameter monitoring, helping engineering teams build reliable automation monitoring architectures in complex media environments.

Industry Application Scenarios

Nexisense stainless steel differential pressure gauges are widely used in chemical process pipelines, chemical fiber production equipment, metallurgical furnace systems, and auxiliary circuits for thermal and nuclear power projects. In chemical reactors and separation towers, the instruments are used to measure the pressure difference between the top and bottom of the tower or across heat exchangers to help determine clogging or leakage trends. In power boiler wind and smoke systems and nuclear power containment auxiliary systems, differential pressure monitoring ensures the normal operation of ventilation and filtration units.

In smart factory and energy monitoring infrastructure projects, this series of instruments is often paired with throttling devices to achieve local flow indication, reducing initial reliance on high-precision transmitters. In hazardous chemical production and long-distance pipeline engineering, the all-stainless steel material and IP54 protection rating ensure the instrument works stably for a long time in corrosive atmospheres or outdoor environments.

In Distributed Control System (DCS) or PLC architectures, engineering contractors can use differential pressure gauges as field-layer redundant indication devices to form complementary verification with the upper computer, enhancing overall system safety and maintainability.

Equipment Structure and Principle

The instrument uses a double bellows structure as the pressure-sensing element. Two bellows of the same stiffness are installed symmetrically on both sides of an "I"-shaped bracket, connected respectively to the high and low-pressure joints on the case via conduits. The movable end of the bracket is connected to the fixed end via a spring plate. A gear transmission mechanism is installed at the fixed end and linked to the movable end through a pull rod, with the dial fixed directly onto the transmission mechanism.

The working principle is based on force balance: when equal pressure is applied to both the high and low-pressure ends, the two bellows generate equal concentrated forces acting on the movable bracket; the spring plate remains undisturbed, and the bracket stays in its original position, with the pointer indicating zero. When a pressure difference exists between the high and low ends, the unbalanced force causes the bracket to displace. This displacement is amplified by the gear transmission mechanism via the pull rod, and the pointer indicates the differential pressure value.

This mechanical design avoids the issue of single bellows being easily affected by static pressure, maintaining good linearity and stability even under high nominal working pressures. Nexisense strictly controls the bellows forming accuracy and welding quality during manufacturing to ensure long-term repeatability.

Core Technical Parameters

The following are the main technical indicators of Nexisense CYW-152B and CYW-153B stainless steel differential pressure gauges for engineering selection reference.

Basic Performance Parameter Table

Material Configuration Table

Note: Differential pressure measurement range, nominal working pressure, and joint thread size can be customized according to project conditions. Common differential pressure ranges cover micro to medium pressure segments (e.g., 0-60kPa). Specific selection should be determined based on media density, pipe diameter, and flow calculation formulas.

System Integration, Protocol Compatibility, and Docking Considerations

In industrial automation projects, CYW-152B/CYW-153B primarily serve as local indication instruments. Their mechanical output can be combined with Nexisense edge acquisition modules to achieve digital conversion of differential pressure signals. Integrators can connect the differential pressure values to PLC digital/analog input channels through dry contacts or matching transmitters, supporting Modbus RTU local networking or Modbus TCP remote upload.

When docking with SCADA systems, a redundant architecture is recommended: the differential pressure gauge provides direct field readings, while the electronic transmitter handles continuous signal acquisition and 4-20mA output, forming an interlocking verification mechanism. For fieldbus architectures supporting OPC UA or EtherCAT, protocol conversion can be completed through Nexisense edge gateways, reducing field wiring complexity.

Installation considerations include:

• Correct correspondence of high and low-pressure joints to avoid measurement errors caused by reverse connection.

• Pressure guiding pipelines must remain horizontal or be equipped with vent/drain valves to prevent air resistance or liquid column errors.

• In high-vibration environments, prioritize parallel joints and secure the gauge body, taking full advantage of the V.H.3 level vibration resistance.

• EMC environment assessment: The instrument has no electronic components and naturally possesses strong anti-electromagnetic interference capabilities, but accompanying cables should be shielded.

Nexisense can provide integration testing support to ensure signal compatibility between the instruments and PLCs, DCS, or IoT edge modules in the project.

OEM/ODM Customization, Bulk Supply, and Quality Control Advantages

Nexisense provides OEM/ODM services for system integrators and engineering companies, including range customization, joint specification adaptation, unification of nameplate logos, and special media compatibility optimization. Bulk supplies can be delivered in batches according to project schedules; standard lead times are stable, and quality control follows ISO industrial standard processes, implementing full traceable records from raw materials entering the factory to finished product shipment.

Engineering procurement teams can obtain prototype verification, type test reports, and long-term spare parts support through technical docking, reducing project risks and inventory pressure.

Real-World Project Application Cases

In a chemical park expansion project, a system integrator needed to configure differential pressure monitoring points for multiple reaction separation units. Traditional carbon steel instruments suffered from corrosion in acidic media environments, leading to indication failure. After adopting the Nexisense CYW-153B slanted joint model, the instruments successfully connected directly with existing three-valve manifolds, shortening the installation cycle by 20%. After six months of operation, the differential pressure indication remained stable without drift or leakage, assisting the PLC in completing flow calculation closed-loop control.

In another nuclear power auxiliary system renovation project, the engineering contractor faced cramped space and vibrating environments. Choosing the parallel CYW-152B allowed the instruments to be embedded in the control cabinet panel and linked with the upper SCADA for alarm functionality, meeting the project's reliability and maintainability requirements for acceptance.

These cases demonstrate that this series of instruments can effectively reduce integration difficulty and post-operation maintenance costs in process control subsystems.

Frequently Asked Questions (FAQ)

Q1: How should I choose between CYW-152B and CYW-153B joint forms to match three-valve manifold integration?
The parallel joint design supports direct flange or thread connection with standard three-valve manifolds, suitable for most process control pipelines. The slanted joint is suitable for cases where pipeline routing is restricted or the installation angle needs adjustment. During engineering selection, it is recommended to provide valve group interface drawings, and Nexisense can confirm the best matching solution.

Q2: How does the double bellows structure ensure long-term stability in high-corrosion media environments?
Both the measurement system and the pressure guiding system are made of special austenitic stainless steel, which possesses strong resistance to chloride ions and acid-base media erosion. Project engineers should provide media composition and concentration parameters so that material upgrades or the installation of isolation protection can be evaluated if necessary.

Q3: How can the signals from the stainless steel differential pressure gauge be connected to a PLC or SCADA system for remote monitoring?
The instrument itself is a mechanical indicator. It can be paired with a Nexisense differential pressure transmitter or edge I/O module to convert displacement into standard analog/digital signals. Through Modbus RTU/TCP protocols, the differential pressure values can be collected and integrated into PLC alarm logic. Redundant configurations are recommended to improve system availability.

Q4: Is the V.H.3 level vibration resistance sufficient for power and metallurgical projects?
This level is suitable for conventional industrial vibration environments. In high-vibration stations, it is recommended to add vibration-damping brackets or choose a liquid-filled auxiliary solution. It is advisable to conduct field vibration tests for verification before actual deployment.

Q5: What technical parameter adjustments are supported for OEM customization during bulk procurement?
Customization is supported for differential pressure range, nominal working pressure, joint thread specifications, nameplate content, and enclosure identification. Engineering companies can propose requirements based on unified project standards, and Nexisense provides prototype verification and consistency assurance for mass production.

Q6: What is the positioning of this mechanical differential pressure gauge compared to electronic differential pressure transmitters in a project?
Mechanical gauges are suitable as local intuitive indicators and emergency backup devices, complementing electronic transmitters. Integrators often adopt a "gauge + transmitter" combination scheme, which meets the field inspection needs of operators while ensuring continuous data acquisition for the upper system.

Q7: What matters should be focused on during installation and maintenance to extend service life?
Regularly check the tightness and venting of pressure guiding pipelines to avoid media solidification or impurity clogging; the zero-calibration cycle depends on operating conditions; for high-temperature or strong corrosion environments, adding protective covers is recommended. Nexisense provides field installation guidance and spare parts supply.

Q8: How are project lead times and quality control guaranteed for engineering progress?
Reasonable stocks of standard products are maintained to support urgent small-batch deliveries; customized models are scheduled for production after signing technical agreements. Quality control covers raw material traceability, process inspection, and factory testing to ensure each batch of instruments meets enterprise standard requirements.

Summary

Nexisense stainless steel differential pressure gauges CYW-152B and CYW-153B, with their all-stainless steel double bellows structure and reliable mechanical indication performance, provide practical field components for process differential pressure measurement in chemical, power, nuclear power, and other fields. Their corrosion resistance, vibration resistance, and flexible joint forms enable system integrators to quickly complete engineering deployment and PLC/SCADA docking.

Project managers, technical procurement engineers, and system integrators are welcome to contact the Nexisense team to obtain detailed technical data, condition adaptation suggestions, or prototype support to jointly promote the stable optimization of process control systems and efficient project implementation.