1. Introduction Solenoid valves are widely used actuators in industrial process control. Their performance and safety characteristics are closely related to the type of power supply. The two most common options are 24V DC (direct current) and 220V AC (alternating current) solenoid valves. This article provides a systematic comparison between the two, covering power supply, […]
Comparison Between 24V DC and 220V AC Solenoid Valves Read More »
1. Definition and Classification of Level In industrial processes, level (liquid level, bulk solid level, and interface) is one of the four key parameters alongside temperature, pressure, and flow. It plays a critical role in production stability, efficiency, equipment safety, energy utilization, and product quality. Liquid Level (Tank/Column/Reservoir): Height of liquid surface. Bulk Solid Level
Level Instrument Selection Guide: Principles, Applications, and Best Practices Read More »
Safety Instrumented Systems (SIS) play a crucial role in ensuring the safety and reliability of industrial processes. These systems are designed to automatically detect and mitigate hazardous conditions, protecting people, equipment, and the environment. A typical SIS is composed of several key components, each with distinct functions that contribute to the overall safety of industrial
Understanding the Components of a Safety Instrumented System (SIS) Read More »
Introduction In operational management and control optimization, I have always emphasized the importance of cross-departmental collaboration and collective problem-solving. A plant that is running steadily already has effective methods in place; what is often missing is a mechanism to identify these methods, standardize them, and then automate them. Advanced tools are not the core contradiction,
Operational Management and Control Optimization: Beyond Tools to Real Capability Read More »
Abstract Gas leak detectors are critical instruments for ensuring workplace safety, preventing environmental pollution, and protecting human health. However, their accuracy degrades over time due to sensor aging, environmental conditions, or frequent use. Regular calibration is not just a maintenance task—it is a rigorous metrological activity that ensures measurement traceability and reliability. This article explains
The Importance of Gas Leak Detector Calibration and Verification Methods Read More »
1. Traditional View of PID Tuning In the conventional approach, PID loop tuning is often treated as an isolated single-input, single-output (SISO) problem. The emphasis is placed solely on the controlled process itself. Once the process model is identified, suitable PID parameters can be directly calculated. From this perspective, testing and modeling the process are
Rethinking PID Loop Tuning: From Isolated Parameters to System Perspective Read More »
1. Introduction Purpose of instrument insulation boxes in harsh environments. Common problems caused by improper selection (temperature instability, water ingress, frequent maintenance). Importance of correct design, materials, and heating system. 2. Core Technical Requirements 2.1 Dimensions and Structure Standard size: 600(H) × 600(W) × 500(D) mm; optional: 800(H) × 600(W) × 500(D) mm. Removable structure
Technical Specification and Application Guide for Instrument Insulation Boxes Read More »
1. Role of Surface Roughness in Flange Sealing Surface roughness of the flange sealing face is a critical factor in ensuring a leak-tight connection. A controlled “serrated” finish enables the gasket to undergo plastic deformation and interlock with the flange surface. Proper roughness creates sufficient frictional resistance to prevent gasket blow-out under internal pressure. The
Surface Roughness of Flange Sealing Faces: Principles, Types, and Practical Guidelines Read More »
A Practical Guide to 9 Common On-Site Installation Issues Flowmeters are indispensable instruments in modern industrial processes. Yet, many measurement inaccuracies, maintenance challenges, or even outright failures are often not due to the meter itself—but rather to improper installation practices.From insufficient straight pipe lengths for electromagnetic flowmeters, to misaligned filters in rotameters, or incorrectly oriented
Are Most Flowmeter Problems Caused by Installation? Read More »
HART (Highway Addressable Remote Transducer) communicators play an essential role in industrial process control by facilitating two-way digital communication over 4-20 mA current loops. These devices are widely used for configuration, diagnostics, and maintenance of field instruments. One notable requirement when using a HART communicator is sometimes having to include a 250Ω resistor in series
Understanding Why a 250Ω Resistor is Needed in HART Communicators Read More »
