PSV Sizing – Gas, Vapour & Liquid Excel Calculator with Rohit Kumar Yadav

🛡️ Simplify Pressure Safety Valve Sizing

The ChemicalWala PSV Sizing Live One-Page Calculator is a practical Excel-based engineering tool developed for preliminary sizing and technical evaluation of pressure safety valves.

Enter the selected relief scenario data, fluid properties, relieving pressure, back pressure, temperature and required relief load. The calculator automatically determines the required discharge area and helps identify a suitable standard valve orifice.

✅ Key Calculations and Features

• Gas and vapour PSV-sizing calculations

• Liquid-service PSV-sizing calculations

• Critical and subcritical gas-flow evaluation

• Relieving-pressure and back-pressure consideration

• Discharge-coefficient input and correction factors

• Compressibility-factor and molecular-weight inputs

• Required effective discharge-area calculation

• Standard API 526 orifice-area comparison

• Recommended next-larger standard orifice

• Selected-orifice adequacy and margin check

• Gas, vapour and liquid result summaries

• Automatic engineering status and warning indicators

• Live Excel formulas with instant recalculation

• Clean one-page calculation-sheet format

📚 Engineering Basis

• API 520 sizing methodology

• API 521 relief-system considerations

• API 526 standard valve-orifice selection

• Vendor verification required for final selection

📦 What You Will Receive

• One ready-to-use Excel PSV-sizing calculator

• Editable relief-case and fluid-property inputs

• Automatically calculated minimum discharge area

• Standard-orifice selection and adequacy check

• Reusable format for different services and relief cases

• Professional calculation sheet for engineering reviews

🎯 Suitable For

• Process and Chemical Engineers

• Process-safety and relief-system engineers

• EPC, project and plant engineers

• Engineering consultants and freelancers

• Students learning practical PSV sizing

⚠️ Engineering Note

This calculator supports preliminary PSV sizing and engineering evaluation. The user must independently establish the governing relief scenario and required relieving rate. Final sizing and valve selection must be reviewed by a qualified engineer and confirmed against the latest applicable standards, project specifications and certified vendor software.