$2500 FREE FREIGHT PROGRAM is for supplies, repair parts and whole goods. Tanks, pipe, sprayers and other large equipment are not included in this program. Applies to Continental U.S. ground shipments only.

Call for details! 1-888-677-5054


Dultmeier Sales will be closed Thursday, November 24th and Friday, November 25th in observance of Thanksgiving

Dultmeier Sales will be closed Monday, December 26th.
Normal operations will resume Tuesday, December 27th. We wish you and your family a very Merry Christmas!

Dultmeier Sales will be closed Monday, January 2nd in observance of
New Year's Day

Dultmeier Sales will be closed Monday, July 4th in observance of Independence Day.
Normal operations will resume Tuesday, July 5th. We wish you a happy 4th of July!!

We are experiencing some technical difficulties on dultmeier.com and apologize for any inconvenience.
If you are running into issues, please phone your order in to 1-888-677-5054

Customer Pickup Orders: to help reduce exposure for our customers and our employees, if you are placing an order for in-store pickup please call in your order ahead of time or place your order online and pre-pay with a credit card. Be sure to let us know when you plan to arrive. We will have your merchandise ready for you and will greet you outside our facility. Thank you for your help!

Due to the impending winter storm Wednesday afternoon and Thursday, ASAP Express is cancelling all operations effective noon Wednesday until midnight Thursday.

Pump Filters / Strainers

by Tom Hansen P.E.by Tom Hansen, P.E. | ©Dultmeier Sales

There are a large variety of pump filters & strainers used in liquid transfer & spraying systems. The main function of a strainer is to "strain" large and small particles from the liquid before it enters key components in the system such as certain types of pumps, meters and storage tanks or truck tanks. While centrifugal pumps can generally handle 1/4" or 3/8" solids without damage, many other pumps such as gear pumps, piston & plunger pumps, injection pumps and others cannot tolerate even very small particles. Therefore, locating a strainer on the suction side of those types of pumps is critical in protecting the pump from damage. On the other hand, many centrifugal pump applications have a strainer located on the discharge side of the pump to protect the meter and to keep particles from entering the final storage tank.
All strainers have screens inside them. These strainer screens are usually easy to remove so they can be cleaned periodically. Screens come in variety of mesh sizes, usually ranging from #6 mesh (6 x 6 squares per inch of screen) to 12 mesh, 20 mesh, 40 mesh, 60 mesh, 80 mesh, 100 mesh and even 200 mesh screens. Most all strainer mesh screens are constructed of stainless steel for corrosion resistance. If the application requires a finer mesh than #200, then most operators use a filter instead. Filters can eliminate fines down to 1 or 2 microns in size.

Y-Style Strainers

The most common type of strainer is the "Y" Style Strainer. These can vary in size from 1/2" to 12" or larger and in a variety of materials.

T-Style Strainers

The second most common type of strainer is the "T" Style Strainer; this type of strainer is more compact than Y Style Strainers.

Basket Style Strainers

Another style of strainer is the high capacity Basket Style Strainer. We offer this style of strainer from Miller-Leaman called the Thompson Filter. These are really strainers, not filters. Screen sizes for the Thompson Strainer range from 1/4" perforated round holes to 100 or even 200 mesh screens. These strainers include very large conical shaped screens with large surface areas for high flowrates at low pressure drops. They also include bottom clean-out ports and are constructed of stainless steel.

Endline Strainers

Another key style of strainer is the Endline Strainer. These strainers are usually located on the end of suction pipes or hose that are pulling liquids from ponds, pits or below ground tanks. Endline Strainers are meant to prevent larger solids and debris from entering the suction hose, not finer particles so a second strainer like the styles noted above will likely be needed to protect some types of pumps, meters, etc. in the liquid system. Another version of the Endline Strainer is the Bottom Hole Skimmer.

Tom Hansen, P.E.  |  Dultmeier Sales
© Copyright Dultmeier Sales, LLC this material cannot be utilized in any way including on other websites or publications without the express written permission of Dultmeier Sales.