Chemical Feed Pump Suction

ohiowater · Feb 21, 2003

What is a good recommended minimum and maximum velocity to maintain in chemical feed pump suction pipe sizing?

Also, is there much concern with drawing 2 - 3 ft suction with typical mag-drive transfer pumps (pump centerline a couple feet above the bulk tarnsfer tank outlet)?

Chris73 · Feb 21, 2003

If you choose between 0.5 and 3 m/s you are in a good range.
If it is a diaphragm pump you can suck 2-3 ft head without a problem.

waterexpert · Feb 21, 2003

You need to know the fluid, the line size and length, and the desired flowrate to answer this question. These can be used to work out net positive suction head. Fluids may allow up to approximately 10 meters of suction line vertical height depending on their vapour pressure at the working temperature, and pressure losses in the line.

Line velocities (assuming you do not wish to keep solids in suspension, and are not dealing with something like 98% sulphuric acid) of around 1m/s are a reasonable approximate first guess for suitable materials of construction.

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Chemical Feed Pump Suction

ohiowater

Civil/Environmental

Chris73

Civil/Environmental

waterexpert

Chemical

Similar threads

Part and Inventory Search

Sponsor