Template:Valve2 Setting Data Section

|- | On || Tick Box || This allows the user to disable the valve. If the valve is Off then the pressure drop across the valve = 0. |- | EquipID || Input || This field is optional. The user may type in an unique ID for the valve. |- | colspan="3" font style="background: #ebebeb" | There are two different operating classes of valve:

1. Simple Valves - these are always 100% open and have no control mechanism.
2. Controlled Valves - these can be opened and closed by the user and the pressure drop changes based on the valve opening.

|- | valign="top" rowspan="7" | OpType || Fixed Drop (Simple) || The user may specify a fixed pressure drop across the valve. |- | Fixed ExitP (Simple) || The user may specify a fixed exit pressure from the valve. |- | Fixed AtmosP (Simple) || The exit pressure from the valve = atmospheric pressure. |- | dP Prop to mass Flow (Simple) || The pressure drop across the valve will be proportional to the mass flow through the valve. The user may NOT set the valve position if this operating mode is used, as the mass flow is the only variable used to calculate pressure drop. |- |Cv Lookup (Controlled) || Use Cv values to calculate the pressure drop across the valve, based on the user defined valve position. |- | dP Prop to Posn (Controlled) || The pressure drop across the valve will be proportional to the user defined position of the valve. |- |K Open Closed (Controlled) || The user defines the K value for the 100% open valve. This type of valve may either be fully open (100%) or fully closed (0%) and no other position. |- | colspan="3" font style="background: #ebebeb" | Fixed Drop (Simple) The following field is visible with this mode. |- | FixedDrop || Input || The required pressure drop when the valve is in the fully open position. |- | colspan="3" font style="background: #ebebeb" | Fixed ExitP (Simple) The following field is visible with this mode. |- | FixedP || Input || The required outlet pressure from the valve in the fully open position. |- | colspan="3" font style="background: #ebebeb" | dP prop to MassFlow (Simple) The following 3 fields are visible with this mode. |- | PressDrop.NoFlow || Input || The required pressure drop when there in no flow through the valve. |- | PressDrop.NominalFlow || Input || The required pressure drop when there is nominal flow (specified below) through the valve. |- | NominalFlow || Input || The nominal flow through the valve. Used for the pressure drop calculations. |- | colspan="3" font style="background: #ebebeb" | dP Proportional to Position (Controlled) The following 2 fields are visible with this mode. |- | PressDrop.Open || Input || The required pressure drop when the valve is in the fully open position. |- | PressDrop.Closed || Input || The required pressure drop when the valve is in the fully closed position. |- | colspan="3" font style="background: #ebebeb" | K Open Closed (Controlled) The following 2 fields are visible with this mode. |- | Diameter || Input || The required diameter of the valve. |- | UserValveK || Input || The required K value of the valve in the fully open position. |- | colspan="3" font style="background: #ebebeb" | Cv Lookup (Controlled) The following fields are visible with this mode. |- | Diameter || Input || The diameter of the entry pipe into the valve. |- | MinorK || Input || The K value for the minor pressure losses into and out of the valve. |- | valign="top" rowspan="7" | CvLookup
(see Model Theory) || Single Point || In this case a single coefficient is specified, corresponding to the flow for the valve fully open. For a partially open valve, the flow coefficient is just scaled proportionally. |- | 2pts (100% interval)|| Provide a Cv for the valve in the fully closed and fully open positions and assume the Cv varies linearly between these values. |- | 3pts (50% interval) || Provide Cv values for the valve for 0, 50 and 100% positions. |- | 5pts (25% interval) || Provide Cv values for the valve at 25% intervals. |- | 11pts (10% interval) || Provide Cv values for the valve at 10% intervals. |- | Quadratic || If the variation of Cv with open area is quadratic then you can specify a single Cv (fully open) and the actual Cv will be calculated using the quadratic equation given in Model Theory. |- | Angle || Provide Cv values at 10 degree intervals for 0 (CV01, fully closed) to CV10 (90 degrees, fully open). |- | Cv00.. || Input || Depending on the Cv Lookup option chosen above, this may be a single field, or up to 11 fields for the user to enter the Cv values for the valve. |- | LinearInterpolate || Tick Box || This option is only visible if the user chooses 3, 5 or 11 points. If this is enabled then the model will interpolate linearly between the individual points. |- | colspan="3" font style="background: #ebebeb" | Stroke Times The following fields are visible if dP proportional to Position or Cv Lookup are chosen. |- | valign="top" rowspan="3" | StrokeTimeMode || None || The actual valve position will move to the required position with no delay time. |- | Single Stroke Time || There will be a fixed delay between setting the required valve position and when the actual valve position reaches the required position. |- | Open/Close Stroke Time || The delay between setting the required valve position and when the actual valve position reaches the required position will be different for opening and closing settings. |- | StrokeTime || Input || The required delay between setting the required valve position and when the actual valve position reaches the required position. Visible if Single Stroke Time is selected. |- | OpenStrokeTime || Input || The required delay between setting the required valve position and when the actual valve position reaches the required position, if the valve is opening. Visible if Open/Close Stroke Time is selected. |- | CloseStrokeTime || Input || The required delay between setting the required valve position and when the actual valve position reaches the required position, if the valve is closing. Visible if Open/Close Stroke Time is selected.