Reduce model development time by 60%. PSX™ is a relief valve rating model for use within Steady State and Dynamic simulation models. Capacity calculations for all types of relief valves defined in API 520 9th ed.

What is PSX

PSX™ is a highly flexible rating model for relief valves for use with process simulators Petro-SIM® from KBC Advanced Technologies and Aspen HYSYS® from AspenTech. Both steady state and dynamic calculation modes are supported. The benefits are:
  • PSX™ provides engineers with an accurate representation of relief valve capacity inside the overall system
  • PSX™ provides improved safety study results by increasing relief valve modelling accuracy

PSX™ is more accurate than the default relief valve model because:

  1. The default model is not accurate for multiphase flow
  2. The default relief valve model input parameters are static within a simulation
  3. PSX™ uses the HEM method for base flow calculation
  4. PSX™ defaults to API 520 for all correction coefficients
  5. PSX™ eliminates the need to estimate de-rating coefficients as they are continuously updated in a Dynamic simulation

This software comes as an extension for Petro-SIM® 6 and onwards from KBC Advanced Technologies and Aspen HYSYS® v7.3 and onwards from AspenTech.

Core Benefits

High integrity safety assessment

No risk of overestimating the relief system capacity under all conditions. No underestimation of capacity due to conservative assumptions.

Default API derating

No input beyond the basic definition of a relief valve is required to model a PSV with the default derating factors. Easy to use for users not intimately familiar with relief valve design.

Detailed definition can be added

All details of the PSV and the derating coefficients are highly customisable. Vendor information can be used to match vendor performance data and operating curves.

Specification Requirements

Operating System
Windows 7 (64 bit) The software has been tested using Windows 7 (64 bit), but will work with Windows 7 (32 bit) as well.
Process Simulator
KBC Petro-SIM 6 and onwards Or Aspen HYSYS V7.3 (CP2) and onwards The software has been qualified with Cumulative Patch 2 installed, but earlier installations of HYSYS V7.3 should also work. Minimum licenses required: HYSYS_Process
Microsoft .NET Framework
.NET Framework 3.5 SP 1 Usually installed as part of HYSYS installation.
Hardware Requirements
BPT PSX has no specific hardware requirements beyond the specifications required for running Aspen HYSYS.

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