Calculations Include:

Valves

Control valves
- Calculation of the cv value, total flow and upstream and downstream pressures
- Calculation of frequency-dependent sound pressure levels in accordance with the IEC 60534-8-3/4. Noise calculations according to the VDMA 24422 from 1979 and 1989 are still possible.
- Calculation of the installed flow characteristics with graphical optimization - including for reducers, viscosity correction and downstream resistance structures
- Precisely mapping of standard valves thanks to a comprehensive library of valve modifiers
or
- Direct selection of the valve from a manufacturer-specific valve database

Control valves with 2-phase flow at the inlet
- Calculation and optimization of control valves with noise prediction and characteristics
- Calculation of liquids with vapour portion
- Calculation of liquid/gas mixtures

Steam conditioning unit
Calculation for designing steam conditioning valves and the associated injection valve.
- The required cooling water flow rate is first of all determined on the basis of the steam-converting valve, then a suitable injection valve is calculated taking account of the injection nozzle.

Actuator forces (Globevalves)
This program module calculates the forces that must be produced by actuators in order to guarantee reliable functioning of the control valve. The following actuator forces are calculated:
- Min. closing force (closed position), Fs0
- Min. opening force (closed position), Fo0
- Min. opening force (open position), Fo100
- Min. closing force (open position), Fs100
- Min. stability force, F? (flow in closing direction)

Throttle Elements

Differential pressure transmitters
- Calculations optionally according to:
- VDI/VDE 2040/2041
- ISO 5167-1 of 02.80 (DIN 1952/07.82)
- ISO 5167-1 of 1995 (DIN 1952/09.92)
- ISO 5167-1 of 1995 / A1 of 1998
- ISO 5167 of 2003
- Instructions concerning conformance with standards provided by an expert support system
- Calculation of measurement uncertainties
- Calculations also for humid gases and non-standard differential pressure transmitters
- Calculations of nozzles in accordance with ASM PTC 6-1996
- Calculations of pitot tubes with selection from an extensible equipment database
 Restriction orifice plates
- Calculation of the internal diameter, differential pressure, volumetric flow and mass flow rate
- Calculation of the energy balance (power loss) and the sound pressure level

Piping System Calculations

Pressure loss calculation
- Individual calculations for pipes, partial resistances, geodetic height and energy balance
- Graphical support

Pressure surge
- Calculation for single-run piping systems which end with a control valve, as a function of the closing time and the valve characteristic
- Valve database and graphical support

Sizing
- Calculation of basic values, such as the surface area, volume, flow velocity and Joukowsky peak

Pipe wall thicknesses
- Calculations optionally according to:
- EN 13480:2002
- DIN 2413:1993
- DIN 2413:1972
- Pipe bends with or without a constant wall thickness can be calculated for pulsating and static loads in addition to straight pipes
- Pipe materials in accordance with EN 13480:2002 can be selected from a user extensible Material Database and you can also calculate all relevant parameters, such as tensile strength, creep rupture strength and yield strength.

Pipe compensation
- Calculations for L and U-bends, changes in length, pipe support loads and stress limits

Span calculation
- Calculation of the individual weights (pipe, medium, insulation)
- Span calculation taking account of sag
- Pipe materials in accordance with EN 13480:2002 can be selected from a user extensible Material Database

Heat Exchangers

Industrial heat transfer media
- Extensible database containing the properties of approximately 180 industrial heat transfer media included in the package.

Shell-and-tube heat exchangers
- Design with calculation of the heat transfer coefficient and the heat balance
- Recalculation by entering the geometry data and calculating the heat transfer coefficient

Condensers
- Calculation of the heat balance, actual heat exchanged, pressure loss, thermal characteristic and flow velocities at the nozzle

Chemical Engineering

Safety valves
- Calculations optionally according to:
- ISO 4126:2004
- AD 2000 Specification A2
- Calculation of the pressure losses in the feeding and discharge pipes as well as the reaction forces
- Database containing the most common safety valve manufacturers for fast, automatic selection

Tank depressurization
- Simulation of contraction and depressurization in one or two tanks by means of a control valve
- Influence of pressure regulators
- Graphical functions for depressurization time, pressure losses in the pipe, noise emissions and operating pressures in the system

Pump motor output
- Power input of pumps and fans
- Recommendations for standard motors

Service

Property calculation
- Thermodynamic calculation of Natural Gas according to AGA-8. The composite of the gas can be defined by the user.
- Calculation of the density, boiling pressure, viscosity, entropy, enthalpy, thermal conductivity, specific heat capacity and enthalpy of evaporation for water and steam in accordance with the steam table IAPWS-IF97
- Additional option for thermodynamic calculation of more than 60 fluids.
- Pressure and temperature-dependent calculation of the specific volume, density, boiling pressure, dynamic viscosity, compressibility, enthalpy of evaporation, etc. for around 1000 other fluids on the basis of an extensible property database
- Graphical representation of all calculated quantities in isobars and isotherms
 

 Material data calculation
- Calculation of the design strength values and physical properties of pipe and equipment materials in accordance with EN 13480:2002, including operating limit tests.

Curve regression
- Calculation and graphical optimization of the factors of polynomials as well as spline, logarithmic, power and exponential functions on the basis of measured values

Instrument Vendors

The following vendors are provided by the CONVAL valve database:

Control valve vendors
Arca, B-Controls, B-Tec , Baumann, Bürkert, Eckardt, EPC, FCV, Fisher, Flowserve, Foxboro, Garlock, Gestra, Gulde, Kaemmer, Leusch, Linde Mapag, Masoneilan, NAF, Neles, Nopa , P&W, Pfeiffer, Samson, Schmidt, Tyco, Valtek, Vetec

Pitot Tubes
Rosemount, Systec, Controls

Safety valve vendors
Ari, Leser

Interfaces

Interfaces that allow data to be exchanged with other programs are nowadays an absolute must for software packages like CONVAL.
CONVAL® entire functionality can for this reason also be made available to other applications via a COM (Component Object Model) interface, a standard developed by Microsoft for its Windows operating system.
CONVAL® users are thus able exchange data between programs such as Excel, Access, Word, etc. on the one hand and CONVAL® on the other.
Many software vendors also have designed their software to interface with Conval, some of these software packages are: CIMS 2000, COMOS, Intergraph, Intools and many others.