Gate Valve: Equipment Tab

Variable Definitions, Ranges and Default Values

The following table shows the meaning of the variables appearing in this tab, as well as their default values and their generally acceptable range. Note that due to the manner by which the variables are used by the sizing and costing equations, the range of acceptable values may be further reduced.

Variable	Default Value	Range

◙ Diameter The diameter of the valve.	5.0 cm	Positive
◙ Max Diameter The maximum diameter that a unit of this type is available for purchase in the market.	10.16 cm	Positive
● Flow Capacity The fully open flowing capacity of the valve.	250.0 Cv	Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Sizing: Design Mode

In Calculate (Design Mode), the user specifies the Maximum Diameter and the system computes the Number of Units and the Diameter. See also Liquid Pressure Drop in a Gate Valve: Modeling Calculations and Gas Pressure Drop in a Gate Valve: Modeling Calculations.

Sizing: Rating Mode

In User-Defined (Rating Mode), the user specifies the Number of Units and the Diameter.

Costing

Equipment purchase cost is based on the diameter and the material of construction. It is supplied by the built-in model assuming as material of construction SS316.

For more information on this equipment, see:

● Gate Valve

Globe Valve

Butterfly Valve

For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.