本文描述了一个计算机模型，用于计算与压力过滤系统运行相关的水力条件，提供了评估许多设计方案的能力，这些方案如果手动执行，则不具有成本效益。计算机模型提供了轻松更改的能力:管道和控制阀配置数据；井泵曲线；以及接收分配系统液压坡度线高程。这允许用户优化过滤器表面管道和控制阀的选择和尺寸。该计算机模型用于设计每天860万加仑压滤水处理厂的过滤面管道和调节控制阀的尺寸。该工厂旨在将水源水的铁和锰浓度降至《安全饮用水法》规定的二级最高浓度限值。 计算机模型分析了大约50种不同的系统水头配置、油井排放条件和过滤器运行模式的水力。Mathcad被用来准备计算机模型。该模型在屏幕上是交互式的，可以立即更新结果。交互环境使设计团队能够快速评估替代方案和ifs，使他们能够快速集中在最终的过滤面管道和控制阀设计上。模型程序包括显示控制阀开度的图表，允许对结果进行视觉评估。所采用的方法适用于其他水力建模问题。

This paper describes a computer model used to compute the hydraulic conditions related to the operation of a pressure filter system providing the ability to evaluate many design alternatives that are not cost effective if performed manually. The computer model gives the ability to easily change: the piping and control valve configuration data; well pump curve; and receiving distribution system hydraulic grade line elevation. This allows the user to optimize selection and sizing of the filter face piping and control valves. The computer model was used to design the filter face piping and to size the modulating control valves for an 8.6 million gallon per day pressure filter water treatment plant. The plant is designed to reduce the source water iron and manganese concentrations to secondary maximum concentration limits set by the Safe Drinking Water Act. The computer model analyzed the hydraulics of approximately 50 different configurations of system head, well discharge conditions, and filter operation modes. Mathcad was used to prepare the computer model. The model was on screen-interactive and provided immediate update of results. The interactive environment allowed the design team to quickly evaluate alternatives and what ifs, allowing them to rapidly converge on final filter face piping and control valve design. The model program included graphs showing the degree of control valve opening that allow visual evaluation of results. The methods employed are applicable to other hydraulic modeling problems.