Description

A Low Pressure and High Pressure Dosing System is a classification of chemical dosing systems based on the operating pressure of the dosing pump and pipeline. These systems are widely used in water treatment, RO plants, industrial chemical processes, and boiler/cooling water treatment. ⚙️💧 🔎 What is a Low Pressure & High Pressure Dosing System? Dosing systems inject chemicals into a process at controlled rates. The difference between low-pressure and high-pressure systems lies mainly in: Pump type Operating pressure Piping and valve requirements Applications 1️⃣ Low Pressure Dosing System Characteristics Operating Pressure: up to 5–10 bar (70–150 psi) Flow Rate: Usually moderate Pump Type: Diaphragm, peristaltic, or small plunger pumps Pipe Material: PVC, PP, or HDPE Applications Water treatment plants – chlorine, acid/alkali dosing RO plants – antiscalant injection Cooling towers – biocides, corrosion inhibitors Small chemical processes Advantages ✔ Simple and cost-effective ✔ Easy to install and maintain ✔ Suitable for continuous dosing at low pressures 2️⃣ High Pressure Dosing System Characteristics Operating Pressure: 10–100+ bar (150–1500+ psi) Flow Rate: Can be high or low depending on pump Pump Type: High-pressure plunger/piston pumps, heavy-duty diaphragm pumps Pipe Material: Stainless steel, PTFE-lined, or high-pressure-rated pipes Applications High-pressure RO plants – antiscalant injection Industrial chemical reactors Oil & gas pipelines – corrosion inhibitors, methanol injection Boilers and high-pressure water treatment