Are you sizing Pressure Safet Valves correctly under backpressure?

Hi ,

When sizing a Pressure Safety Valve, most engineers focus on set pressure and relieving rate—but ignore how backpressure can quietly derate the valve capacity and lead to undersizing.

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In a new practical guide, we shall walk through how to use the backpressure correction factor Kb when sizing PSVs, including:

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• What Kb actually represents and why it matters for PSV capacity.
• When you should apply Kb depending on valve type and flow regime.
• How to read API 520 charts to estimate Kb for balanced bellows, conventional, and pilot-operated valves.

If you’re doing PSV or relief system sizing, this will help you avoid common mistakes around backpressure and select safer, more reliable valves.

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👉 Read the full guide here:

https://boostrand.com/psv-sizing-guide-how-to-calculate-the-backpressure-correction-factor-kb/

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Best regards,

Mohamad