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WESTFALL


Westfall Manufacturing Company 為美國專業流體設備製造商，技術歷史可追溯至 1955年，長期深耕於水處理與工業流體控制領域。自創立以來，Westfall 累積了：
  • 超過 2,500 套真空硅藻⼟過濾系統（⾃1955 年起）
  • 超過 10,000 台文丘里流量計（Venturi）（自 1965 年起）
多年來，Westfall 持續為眾多水處理原廠設備製造商（OEM）提供核心流體設備，建立穩定且長期的合作關係。

產品原理

無動件混合原理
Westfall 靜態混合器為無動件設計，透過內部特殊結構產生交替渦流分 剪切擾流（Shear Turbulence）使注入流體在短距離內完成均勻混合。 此設計具備：
  • 高效率混合
  • 極低壓損
  • 無轉動部件
  • 幾乎免維護
  • 使用壽命長

客製化設計

Westfall 提供完整客製能⼒：
  • 特殊尺寸
  • 環體設計
  • 客製混合板結構
  • 客製加藥接頭與注入管
  • 不同壓力等級設計
  • CFD 模擬分析優化
  • 可依流量、壓力、黏度與混合需求進行工程設計。

產品優勢

  • 優異的混合效果
  • 低壓損設計
  • 短安裝長度，節省空間
  • 安裝簡便
  • 無轉動部件，無維護需求
  • 使用壽命長
  • 整合式加藥接頭設計
  • 適用管徑可達 120”
  • 可提供多種材質：PVC、FR、316 不鏽鋼、鈦材、Kynar、Teflon 等

應用領域

水處理系統

  • 飲用水與廢水處理
  • pH 控制
  • 氯化與脫氯

化學與工業製程

  • 化學加藥混合
  • 聚合物與絮凝劑混合
  • 溶解氣體處理

管線式精準混合

  • 在線加藥系統
  • 連續式流體混合
  • 低壓損短距離混合需求

Westfall Model 2800 混合性能驗證

Westfall Model 2800 靜態混合器經美國 Alden Research Laboratory 進⾏ CFD 模擬驗

  • 測試管徑：4” 管
  • 測試流體：水（常溫常壓）
  • Beta ratio =0.7 ，為混合板開孔比例，⽤於調整混合強度與壓降平衡。
  • 流速範圍：0.1 – 1.0 m/s
  • 湍流模型：k-ε Turbulence Model
  • 以 CoV（Coefficient of Variation）評估混合均勻度，CoV 越低，代表混合越均勻

經第三方模擬驗證，約 3D 內完成主要混合，5D 內 CoV < 0.06，10D 內達⾼度均勻狀態其阻力係數，K-value = 29.2

混合效率數據

壓降特性

Variable Flow Static Mixer Model 2900

For maintaining constant headloss while blending liquids or gases of varying flows, viscosities and temperatures

The compact drop-in Variable Flow Mixer Model 2900 accommodates a turn down ratio of up to 20-1 in liquids or gases by incorporating two of Westfall’s signature wafer mixers. The mixer provides a faster, better and often more economic choice for mixing and blending while providing constant headloss.

The upstream wafer remains stationary while the downstream wafer pivots as it adjusts incrementally to changing flow conditions. The downstream mixer responds to a differential pressure controller, opening wide for maximum flow velocity to reduce headloss, and closing as flow decreases to enhance mixing. Headloss remains constant throughout.

Variable Flow Mixer for Bitumen Blending

Westfall Manufacturing introduced the Variable Flow Wafer Model 2900 for bitumen blending, viscosity and density control in 2010. The device mixes multiple diluents to the correct viscosity and density, and allows pumping over a wide range of flow rates.

The Westfall Model 2900 is a high shear wafer-style static mixer which achieves a low CoV (coefficient of variation) of injected diluents. Because it is capable of achieving a uniform concentration of injected materials while sustaining specific pressure loss criteria downstream, the Model 2900 reduces consumption of bitumen diluents.

The CFD report from Alden Labs shows that this mixer accommodates flow rates at up to a 20 to 1 turndown ratio.

Model 2900 Variable Flow Static Mixer used for bitumen blending achieves a low CoV of injected diluents. Capable
of achieving uniform concentration of injected materials within a short downstream distance, while sustaining the
maximum pressure loss criteria.
CFD Report 6″ Variable Flow Rate Mixer 2900
2900 Brochure
 

Why Choose a Model 2900 Variable Flow Static Mixer?

  • Fixed Upstream Mixer & Pivoting Downstream Mixer
  • Differential Pressure Control
  • Sustains Required Headloss
  • Up to 20-1 Turndown Ratios
  • Viscosity & Density Control
  • Mixes Well at Low Flow Rates
  • Reduces Consumption of Dilutants
  • 3 Orifice Ratios
  • 3/8” to 120” Pipe Diameters
  • Affordable, Easy to Install
  • Low Maintenance
  • Ultra-Durable
  • Easily Ships Worldwide

Common Applications

• Water Treatment
• Waste Water
• Chlorination/De-Chlorination
• Chemical Processing
• Polymer Blending
• Flocculant Blending
• pH Control
• Chemical Blending
• Food Processing

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