INSTRUCALC - Instrument Engineering Calculations
Control Valves, Flow Elements, Relief Devices, Fluid Properties, Pipe Pressure Loss, Liquid Waterhammer
Size more than 50 different instruments with this easy-to-use and accurate sizing program.
InstruCalc 8.1 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 calculate, display and print graphs of your calculations.
InstruCalc 8.1 allows you 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.
InstruCalc 8.1 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.
InstruCalc 8.1 consists of more than 74 routines divided into five main sections
- Control Valve sizing: Gas, liquid and two-phase flow.
Noise prediction and cavitation. Graphs available for Control Valves are:
valve Cv and flow; valve pressure drop and flow; linear trim; and, equal
percent trim. Uses ANSI/ISA 75.01.01 Standard
- Relief Valve sizing:
disks, tank vents. Program
uses API RP 520 7th Edition. Tank venting is to API 2000 5th Edition
- Flow Element sizing: ISO and AGA orifice plates,
nozzles, venturis; annubars; integral flow orifice meters; restriction
orifices; vortex, target, rotameter and elbow meters.
Program 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. Flow Element graphs include: flow and
Miller's Handbook, 3rd edition, 1996 , and ISO 5167, 2003.
- Pressure drop in liquid and gas pipes - Calculations use Darcy
Formula, Colebrook equation and Crane Technical Paper No.410
- Waterhammer calculations: Waterhammer Closing Time,
Pressure Rise and Support Force. Uses Joukowski formula
INSTRUCALC v8.1 New Features
1.Engineering Standard upgrades
- Latest CV ISO Standard ANSI/ISA 75.01.01-2007
- Pressure Relief Devices Program follows API 520 2009
2. Engineering Improvements
- Technique for showing cavitation in restriction orifices and venturi meters
- Expanded vortex meter sizes available – up to size 36 (Flow Elements)
- Incorporation of Z-factor in gas-flow for sizing Flow Elements
- AGA8 option for Natural Gas in Flow Elements
- Added option to specify outlet pressure of orifice Flow Element.
- Added Text box at the bottom of the calculation for comments such as
exit angle of venture meters
- PRV Program provide option to calculate flow rate for a known size RV.
- Clarify status to show more clearly flashing, cavitation and choking of
- Outlet of control valves - flow velocity at outlet flange
- Allow for Density input instead of Specific Gravity in all Programs
- Allow absolute and gauge units for all pressure inputs
3. Operational Improvements
- Compatibility with Windows 7 (both 32 bit and 64 bit)
- Rearrange appearance of program – basic form set-up and day to day
options – removed them and clarified there use.
- Excel Import/Export for process data
- Database Print manager with options to print all the database
stored data and all the calculations or any combination of them.
4. New Ability to Transfer Data between Files
- Provision has been provided to transfer Version 5.x data to MS
Access for Version 8 use .
- Data files are now Microsoft Access.
- Version8.1 now saves all calculated data. There are separate tables for
calculation data, units' data, data sheets, pressure drop calculations,
chemical properties composition data and water hammer data. This allows for
data to be available for manipulation.
Purchase ISA Standards for Control Valves, On-Off Valves and Actuators Here
Purchase ISA Standards for Measurement Devices and Transducers Here
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