WOLF ENERGY SA
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Engineering & Technology

# BUTTERFLY VALVES

## MAIN FEATURES

• Selection of an unlimited number of valves for each analysis
• Description of each valve through data supplied from manufacturers (e.g. shape, geometry, mass, weight, etc.)
• Computation of characteristic curves (i.e. head versus angle of attack, discharge versus angle of attack, torque versus angle of attack, rotational speed versus angle of attack) for any given working condition
• Computation of head H and torque T given the discharge Q and the rotational speed N for all angles of attack i.e. H=H(Q) & T=T(Q,N)
• Computation of head H and rotational speed N given the discharge Q and the torque T for all angles of attack i.e. H=H(Q) & N=N(Q,T)
• Computation of discharge Q and torque T given the head H and the rotational speed N for all angles of attack i.e. Q=Q(H) & T=T(H,N)
• Computation of discharge Q and rotational speed N given the head H and the torque T for all angles of attack i.e. Q=Q(H) & N=T(H,T)
• Comparison of analytical results with original data from manufacturers
• Visualisation of results
• Suitable for designing and testing

## OPTIONS FOR IO OPERATIONS

• Microsoft Excel Spreadsheet Files (xlsx)

## OPTIONS FOR GRAPHICS

• Standard Image Formats (jpeg, tiff)
• Portable Document Format (pdf)

## TEST CASES

Figure 1, Figure 2, Figure 3 and Figure 4 illustrate non dimensional coefficients as a function of angle of attack for a typical valve.

Figure 1. Contraction coefficient (Y-Axis) versus angle of attack (X-Axis).

Figure 2. Loss coefficient (Y-Axis) versus angle of attack (X-Axis).

Figure 3. Eccentricity coefficient (Y-Axis) versus angle of attack (X-Axis).

Figure 4. Torque coefficient (Y-Axis) versus angle of attack (X-Axis).

## DELIVERABLES

 User's Manual PDF