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InstruCalc 9.0

Industry’s most popular and complete desktop applications for instrumentation calculations and analyses.
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InstruCalc 9.0 is one of the industry’s most popular and complete desktop applications for instrumentation calculations and analyses. InstruCalc is a set of engineering programs capable of determining the basic engineering data and requirements for equipment.
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InstruCalc 9.0 calculates the sizes of control valves, flow elements, and relief devices; produces data sheets for calculated items; and prepares instrument summaries and uses data sheets as a database for generating reports:

  • Size more than 50 different instruments with this easy-to-use and accurate sizing program.
  • Calculates the sizes of control valves, flow elements, and relief devices; produces data sheets for calculated items; and prepares instrument summaries and uses data sheets as a database for generating reports.
  • The Control valve and Flow element modules now will calculate, display and print graphs of the calculations.
  • Allows to select any set of engineering units, including your own customized set. Units can be mixed, matched and changed in the middle of a calculation.
  • Consists of more the 74 routines divided into four main sections: Control Valves • Flow Elements • Relief Devices • Process Data
  • Calculates process data at flow conditions for 54 fluids in either mixtures or single components and 66 gases in either mixtures or single components. Files can be updated with additional users’ fluids and gases.
  • Calculates the orifice size, flowrate or differential range, which enables the user to select the flowrate with optimum accuracy. It provides the recommended size and corrects the orifice size accordingly.

Process data can be converted individually or jointly with a simple click of the mouse.

Updates and What’s New in InstruCalc Version 9.0

1.  Engineering Standard Upgrades

A. Control Valve revisions:

Updated to ANSII/ISA 75.011.01-2012

Calculation accuracy changed for critical flows

Viscosity correction factor changed

Pressure drop calculation revised to agree with Crane Technical paper No 410.

Option of Cv Units (English) or Kv units (Metric) added.

Option of either, aerodynamic noise calculation by ISA 75.17 method or InstruCalc method

Calculation accuracy added (input data within acceptable limits)

B.  Relief Devices

Pressure Relief Devices Program follows API 520 Pt 1, 9th edition dated 7/14

2.  Operational Improvements

Added the ability to have more than one calculation open at a time. Each instance of the program is framed in a different color. The user can have multiple “what if” scenarios displayed for making engineering decisions.

The programs are conveniently divided into 4 modules:

  1. Control Valves
  2. Flow Elements
  3. Relief Devices
  4. Miscellaneous

Module 1- Control Valves

For liquid, gas, steam, and two-phase flow using the ISA formulas.

Contains programs for calculating Cv and analyzing for cavitation within the valve, critical flow and flashing through the valve, and noise generated by the valve.

Calculation Screen for Valve Sizing

Required input fields highlighted. Other options for calculate system pressure drop, water hammer (valve closing time), prepare data sheet and create graphs. Change setup option to set units, select calculation from valve size, flowrate or pressure drop and other options.

Module 2 – Flow Elements

For flow and restriction orifice plates; flow nozzles and venturies; gas, steam, vapor, and liquids; flange, radius, pipe, and corner taps.

Uses concentric, eccentric, segmental, quadrant edge, and conical plates. Calculates Beta ratio, orifice bore and flow for a selected bore.

Calculation Screen for Liquid Flow, Concentric Flange Taps

Required input fields highlighted. Options for calculating inlet pressure, preparing data sheets and creating graphs.

Change setup option for setting units, selecting calculation options from orifice size, flowrate or differential range, selecting drain and vent hole and other available options.

These programs determine the relationship between the flow rate, the pressure drop and the size of the hole. They are based on ISO 5167 and follow the procedures described in The Flow Measurement Engineering Handbook by R. W. Miller.

Module 3 – Relief Devices

For pressure-relief devices, rupture discs, and breather valves.

This liquid and gas application calculates API or ASME size for known flow, thermal expansion, and external fire. The external fire program has the option of either the API or the NFPA heat input methods. It also calculates the maximum flow rate for the selected valve and the maximum back pressure, which maintains the required flow and relieving forces.

Liquid relief known flow calculation screen

Required input fields highlighted.

Options for calculating pipe losses and preparing data sheets.

Change setup option for setting units, selecting calculation options from valve size or flowrate, and other available options.

Module 4 – Auxiliary Programs

For determining line pressure drops for gas and liquids, calculates compressibility factor, flowing density, vapor pressure and temperature, latent heats at pressure and temperature, and physical properties of mixtures.

These programs are useful for many other engineering activities, such as centrifugal pump line loss calculations and determining pressure available for control valve pressure drop.

Line loss – Liquid flow calculation screen

Required input fields highlighted.

Change setup option for setting units, selecting fluid density options (density or specific gravity)