The request
“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.”
Then tryAdd a low-level alarm on the chemical day tankAdd a second duty metering pump
What is in this drawing
Read the decisions behind it.
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.
More like this
Other examples in this family.
FAQ
Common questions
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.