The ValSize software from Schubert & Salzer Control Systems allows you to determine an ideal valve size and the required flow coefficients for given operating conditions and fluid properties – and also offers a variety of practical functions and tools as well.
During its development, we focused especially on ease-of-use. Special valve characteristics that the user is probably unaware of, like the FL value (pressure recovery factor) for example, are not queried – they are stored in databases for each valve series.
The website with the corresponding data sheets for the calculated valve can be accessed simply by clicking on the link in the software interface. The program can be operated in 12 languages and is available for free via download.
Valve Sizing Software (ValSize 10.3)
Format: exe (setup file)
File size: 426 KB
The calculation concept is based on the sizing equations in the international standard IEC 60534, the currently valid standard is DIN EN 60534-2-1:2012-01 “Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions”.
Overview of all functions and tools:
In the “Sizing” mode, a valve suitable for the fluid properties of the application is calculated, and various data for the individual operating conditions is provided. This includes the particular KV/CV values, the corresponding valve openings and the required rangeabilities. These provide an indication for the selected valve incl. its characteristic curve about the ability to handle the entire range of the mass flows to be controlled. In addition, the flow velocities, up- and downstream, are determined. If desired, ideal nominal sizes are also suggested to keep the valves in an “economic” range. Moreover, a calculation of the expected noise level and the fluid properties of the selected fluid is given.
In the “Flow Calculation” mode, the flow for a selected valve can be determined depending on the valve opening.
Leakage Rate Calculation:
A new feature in Version 10.3.4.0 is the ability to calculate allowable leakage rates for various seating technologies.
Process Flow Characteristic:
The “Process Flow Characteristic” tool allows a calculation of the characteristic curve based on the installation data, which means the flow as a function of the valve opening. Typically this is not identical to the valve characteristic because most of the time for an installed valve, the inlet pressure usually decreases with raising flow, whereas the outlet pressure increases.
Heat Exchanger Calculation:
The “Heat Exchanger Calculation” tool allows calculation of the mass flow of condensed saturated steam from the required heat exchanger output.
Vessel Pressure Calculation:
When a vessel is filled with a gas or gas is drained from a vessel, the pressure profiles over time can be calculated using the “Vessel Pressure Calculation” tool.
Fluid Properties Catalog and Assistant:
Standard media such as air, water, and water vapor can be selected as the flow media. In this case, there is no need to enter additional fluid properties. Implausible temperature entries are corrected automatically. For example, if the temperature specified is too low for water vapor, then it is reset to the saturation temperature. In addition, databases for perfect gases and liquids can be generated, mixtures of perfect gases can be calculated, and the fluid properties of unknown media can be determined using the so-called “Fluid Properties Assistant”.