News
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The Steel Joints of Coal Chemical Industry: A Complete Guide to How Valves & Instruments Govern the Entire Process Flow
When people talk about coal chemical plants, they picture massive gasifiers, crisscrossing pipelines and towering process columns. Yet it is often the inconspicuous valves and instruments that determine whether this complex industrial system can operate safely, stably and efficiently. Acting as the plant’s hands, limbs and eyes, they are the unsung hidden champions of the coal chemical sector. How Harsh …Read more -
Why Are Valve Positioners So Important?
A valve Positioner is a device used to increase or decrease the air load pressure driving the actuator until the valve’s stem reaches a “POSITION” balanced to the output SIGNAL from the process variable instrument controller. Valve positioners are used on controlling valves where accurate and rapid control is required without error or hysterises. Positioners are generally mounted on the …Read more -
5 Common Causes of Inaccurate Level Gauge Readings and On-Site Troubleshooting Methods
Level gauges are critical instruments in petrochemical, refining, and chemical processing plants. When readings drift or become unreliable, the consequences range from process inefficiency to serious safety incidents. Yet in many cases, the root cause is not a faulty instrument — it’s an installation issue, a maintenance oversight, or an overlooked process condition. This article walks through the five most …Read more -
Differential Pressure Level Transmitter: Impulse Line Principle & Troubleshooting
1. Normal Operating Principle 💡 Low-pressure side (L):Taps vapor-phase pressure from the tank’s upper space (approximately atmospheric pressure for open-top tanks). High-pressure side (H):Taps bottom pressure = Vapor-phase pressure + Hydrostatic liquid column pressure. Transmitter measured differential pressure: ΔP=PH−PL With stable medium density & unobstructed impulse piping and proper vapor pressure compensation: ΔP≈ρgh Differential pressure varies synchronously with liquid level …Read more -
Why Relying on a Single Level Sensor in Storage Tanks Is a Critical Risk (And What to Do Instead)
The Illusion of Simplicity A single-level sensor seems like the obvious, cost-effective solution—especially when tanks appear stable and operations run smoothly. But in industrial storage, apparent simplicity masks systemic vulnerability. One sensor failure doesn’t just mean missing data—it can trigger overfills, under-draws, safety incidents, environmental releases, or unplanned shutdowns. 3 Hard Truths Behind Single-Sensor Reliance 1. No Redundancy = No …Read more -
Why Do Control Valves in PTA Units Keep Jamming? We’ve Identified These 4 Real Causes
Why Is the PTA Environment So Demanding? The process medium in a PTA oxidation unit is an acetic acid solution carrying terephthalic acid (TA) slurry. Typical conditions: acetic acid concentration 85–98%, operating temperature 180–200°C, pressure approximately 15–18 bar. This combination creates what we call a “four-way attack” on any control valve: Concentrated acetic acid corrodes standard stainless steels continuously. TA …Read more -
Valve Technology: Professional Terminology Reference Guide
Part I — Performance Terminology 1. Strength Performance The strength performance of a valve refers to its capacity to withstand the pressure exerted by the working medium. As pressure-bearing mechanical components, valves must possess sufficient structural strength and rigidity to ensure long-term, reliable operation without cracking or permanent deformation. 2. Sealing Performance Sealing performance refers to a valve’s ability to …Read more -
How to Choose Reliable Industrial Equipment for Global Procurement in 2026
As global industries continue to expand and modernize, the demand for reliable industrial equipment has grown significantly. From oil & gas to power generation and chemical processing, procurement professionals are under increasing pressure to source equipment that ensures efficiency, safety, and long-term operational stability. In today’s competitive environment, choosing the right industrial equipment supplier is no longer just about price—it’s …Read more -
Control Valve vs Regulating Valve: What’s the Difference?
In the oil & gas, petrochemical, and process industries, the terms “control valve” and “regulating valve” are often used interchangeably. But are they truly the same? In practice, there are subtle differences in definition and usage that are worth understanding. 1. What is a Control Valve? A control valve is a key final control element in a process control system. It is …Read more -
Common Valve Issues and Their Possible Causes
Industrial valves play a critical role in regulating flow, pressure, and process safety. However, during operation, various issues may arise due to installation conditions, process changes, or improper maintenance. Understanding common valve problems and their potential causes can help operators identify faults quickly and maintain stable system performance. Below are some of the most common valve issues encountered in industrial …Read more