Power Venture - Cambodia

25/07/2026

25/07/2026

PRV vs PSV – Understanding the Difference in Process Plants

In every pressure system, protecting equipment and personnel from overpressure is critical. Two of the most important safety devices used in process industries, oil & gas, chemical plants, and CBG (Compressed Biogas) plants are the Pressure Relief Valve (PRV) and the Pressure Safety Valve (PSV).

Although their names sound similar, they serve different purposes.

🔹 What is a PRV (Pressure Relief Valve)?

A Pressure Relief Valve (PRV) is primarily designed for liquid service. It opens gradually (modulating action) as the system pressure increases above the set pressure. The valve releases only the amount of fluid required to maintain a safe operating pressure and closes gradually when the pressure returns to normal.

Key Features:

✔ Used mainly for liquids (water, oil, slurry, chemicals)
✔ Gradual opening and closing
✔ Controls system pressure continuously
✔ Prevents damage to pumps, pipelines, and liquid systems

Common Applications:

• Pump discharge lines
• Hydraulic systems
• Water pipelines
• Slurry transfer systems
• Liquid storage tanks

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🔹 What is a PSV (Pressure Safety Valve)?

A Pressure Safety Valve (PSV) is designed for gas, steam, and vapour service. It operates with a pop action, opening fully and instantly when the pressure exceeds the set limit. This rapid release protects equipment from catastrophic overpressure.

Key Features:

✔ Used for gases, steam, and vapours
✔ Opens instantly (Pop Action)
✔ Provides emergency pressure relief
✔ Protects pressure vessels and critical equipment

Common Applications:

• Pressure vessels
• Digesters
• Biogas holders
• Compressors
• Boilers
• Steam systems
• Gas pipelines

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🔹 PRV vs PSV – Quick Comparison

PRV

- Medium: Liquid
- Operation: Gradual (Modulating)
- Function: Pressure control
- Application: Pumps & liquid systems

PSV

- Medium: Gas/Steam/Vapour
- Operation: Instant (Pop Action)
- Function: Emergency pressure protection
- Application: Pressure vessels & gas systems

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🔹 Importance in CBG Plants

In a CBG (Compressed Biogas) plant, both valves play an essential role in ensuring safe and reliable operation.

PRV is typically

25/07/2026

Storage Tanks 🙂

25/07/2026

Power Plant DCS System

24/07/2026

🔋⚡ Battery Run Time Calculation – How Long Will Your Backup Last? ⏳

Accurate battery run time calculations are essential for UPS systems, data centres, telecom sites, and emergency power to ensure uninterrupted operation. 🏢

✅ Determine the total connected load (W or kW) ⚡
✅ Select the battery voltage (V) 🔋
✅ Calculate the required battery capacity (Ah) 📊
✅ Consider inverter/UPS efficiency (%) 📈
✅ Apply the required backup time (minutes or hours) ⏱️
✅ Include a safety margin for battery aging and future expansion 🛡️

💡 Proper battery run time calculations ensure reliable backup power, prevent unexpected shutdowns, and optimize battery system performance. 👷‍♂️🔋

17/07/2026

⚙️ Want to learn the basics of DCS Programming?

DCS (Distributed Control System) is used to monitor and control industrial processes safely and efficiently. This infographic explains the basic workflow of DCS programming, system architecture, programming languages, and control loop in a simple and easy-to-understand way.

If you are a student, fresher, or working in automation, this guide will help you understand the fundamentals.

💬 Which DCS platform have you worked on—ABB, Yokogawa, Honeywell, Siemens, or Emerson? Share your experience in the comments!

15/07/2026

LPG Manufacturing Process.