Water Treatment Chemical Dosing Skid P&ID

This process P&ID shows a compact chemical dosing skid for water treatment. Raw water enters the flash mixer while coagulant leaves the chemical day tank through a diaphragm metering pump. FT-101 measures the chemical dosing flow and sends an electric signal to FIC-101. The controller moves fail-closed FV-101 through a pneumatic signal to regulate the chemical dose. The mixed water then enters a contact tank before leaving as treated water. The drawing makes the relationship between the process stream, chemical stream, and control loop clear without attempting to show every skid detail. Add duty and standby pumps, bunding, injection quills, sampling points, interlocks, and chemical-specific safety equipment when the installation requires them.

Type P&IDNorme ANSI/ISA-5.1-2009 + ISO 10628-1:2014Moteur schematex-pidMis à jour 24/09/2026

La demande

“A water treatment chemical dosing skid: a chemical day tank with duty and standby diaphragm metering pumps sends coagulant through FT-101 and fail-closed FV-101 into a flash mixer receiving raw water, then to the mixed-water outlet; FIC-101 controls the dose valve.”

Essayez ensuiteAdd a low-level alarm on the chemical day tankAdd a second duty metering pump

Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Chemical source

Store coagulant in a day tank.

02Metering

Use a diaphragm pump for the dosing stream.

03Control

Measure chemical flow and adjust FV-101.

04Process path

Mix raw water and dose before the contact tank.

Use this P&ID pattern for a basic liquid chemical dosing skid ahead of a treatment contact stage.

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FAQ

Questions fréquentes

Why use a diaphragm metering pump?

It is commonly used to deliver a controlled liquid chemical dose.

What does FIC-101 control?

It adjusts the chemical flow-control valve using the measured dosing flow.

What is the contact tank for?

It provides time after mixing for the treatment chemical to act on the water.