Valve Curve Data Fields

This table lists all the data fields for a Valve Curve. Some of them can be viewed and edited on the Valve Curve Grid View of the Links Grid.

There are a number of built in curves displayed in the Valve Curve Grid View. Fields cannot be edited for built in curves.

Once a User Defined curve has been added to the Valve Curve Grid View, fields can be viewed and edited on the Valve Curve Page, which also displays a graph of valve characteristics.

Further information, including units details, about all the Network Object fields stored in the database can be found in the data fields topics listed in the Network Data Fields topic.

Note: Use the scroll bar at the bottom of the table to view its entire content.

Valve Curve Data

Database Table Name: wn_valve_curve

Field Name

Help Text

Flag

Grid

Property Page

Size

Precision

Units

Database Field

Data Type

Default

Error Lower Limit

Error Upper Limit

Warning Lower Limit

Warning Upper Limit

Notes

You can keep freeform notes about any object in your network. The notes field can be up to 64,000 characters in size, or about 10 pages of printed text.

NO

YES

NO

0

notes

Memo

Loss Coefficients

Table of values describing the curve. The table should be filled in from manufacturers' information where possible.

Opening

Percentage Opening of the valve

Loss Coefficient

Loss coefficient value (from manufacturers information where possible)

Flow Factor

Flow Factor (from manufacturers' information where possible)

Database Table Name: wn_valve_loss_coefficients

Position in Data Structure

Field Name

Help Text

Flag

Size

Units

Database Table

Database Field

Type

Default

Error Lower Limit

Error Upper Limit

Warning Lower Limit

Warning Upper Limit

1

Opening

YES

WN_OPEN

wn_valve_loss_coefficients

opening

0

100

2

Loss Coefficient

NO

wn_valve_loss_coefficients

loss_coeff

NO

YES

NO

0

curve

Array

Curve ID

Name of curve (limited to 30 characters)

YES

YES

NO

30

curve_id

Text

Curve Type

Either "Builtin" or "User Defined"

Database Value

Description

0

Builtin

1

User Defined

NO

YES

NO

user_defined

Boolean

1

Description

Optional text to be entered by user

YES

YES

NO

80

description

Text