Category Archives: Application

Abrasive Ceramic Slip Success

By Yamada Salesman, Central US

I recently began working with a ceramic tile manufacturer in my territory that uses a good number of air operated diaphragm pumps that hadn’t been performing well. Their process consisted of transferring abrasive ceramic slip mixture throughout different parts of their manufacturing process. The customer was using a competitor’s brand of diaphragm pumps and were growing impatient with the lack of consistently and longevity to hold up in their abrasive fluid service. The air operated diaphragm pump is the most commonly used pump technology in this type of application. However, the biggest issue they were having was with the abrasive fluid creating premature wear on both the diaphragms and the check balls/seat area of the pump within typical operation. In this instance, the customer was experiencing a ton of issues related to wear on the seats/balls of their ½” diaphragm pumps. After meeting with the customer on their concerns, they expressed interest in trying a Yamada diaphragm pump to address some of the issues they were experiencing.

Yamada 3/4″ NDP-20 Aluminum Pump

Upon hearing about their willingness to commit to trying a Yamada pump in their process, I coordinated with engineering at Yamada on coming up with a pump offering that would give them a solution to the issues they were experiencing. Previously, the customer had been using a ½” pump constructed of polypropylene with Santoprene® elastomers. Instead of offering the same material and size pump, we decided to suggest a larger ¾” pump to be run at a slower inlet air pressure supply to lessen the wear from the abrasive fluid. Along with increasing the pump size, we also decided to offer an aluminum pump with stainless steel check balls/seats that would hold up better to the abrasive service that was eating away at the seating surface of the competitor pumps.

In addition, we also supplied the pump with abrasion pads, which are unique to Yamada pumps, providing an extra layer of protection between the inner portion of the diaphragm and center disk. These abrasion pads protect against the commonly seen uniform wear pattern that develops in abrasive service applications and helps extend the life of the diaphragm over time. 

Click to Trial a Yamada Pump Today!

We put the Yamada pump in on trial and it proved to be much more successful and durable, as compared to the competitor pumps the customer was already using. Previously they were getting approximately 3-4 weeks of service out of the competitor brand pumps. The Yamada pump stayed in service, without a failure, for 9 weeks! After successful completion of the trial period, the customer then tried larger versions of the same Yamada pump in similar applications, utilizing Yamada’s 2” and 3” pumps. The larger pumps proved successful as well. The plant has now decided going forward to switch all of their diaphragm pumps over to Yamada pumps.

Given the alternative materials of construction we offered for the trial pump to hold up in the abrasive service, and the support from engineering at Yamada, we were able to provide the customer with a pump that held up longer and proved reliably in a demanding ceramic slip transfer application. Thus, allowing us to earn their business and trust all while standing behind our product via a trial. 

Santoprene® is a registered trademark of Exxon Mobile Corporation.


By Vaughn Mullet

Meat processing facilities, such as the poultry industry, produce wastewater with heavy loads of fats, oils, grease and solids. Before sending that water down the sewer drain, pre-treatment is required to remove as much of these solids and oils as possible. Removing these contaminants is simple with the proper designed DAF system. Yamada Pumps have been able to fill a “niche” in these systems, enabling better handling of the waste.

What is a DAF system?

Dissolved Air Flotation Systems (DAF) is a water treatment process that clarifies wastewater through the removal of suspended matter, such as, oil, greases or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended matter, casing the suspended matter to float to the surface of the water, where it may then be removed by a skimming device.

Pumps for handling DAF sludge.

A multitude of positive displacement pumps have been used to transfer the DAF sludge; however, recently AODD (Air-Operated Double Diaphragm) pumps have become an option. Their ability to handle the viscous sludge and the ability to run dry without damage enables the pump to continue to run as the hopper empties. Conventional ball valve design AODD pumps (with bottom suction, top discharge) constructed in Aluminum with TPO or Buna N elastomers, were previously used. In poultry fresh (kill) plants, pieces of debris from the wash down would hang up the ball check valves, requiring regular tear down for cleaning. This would require the conventional AODD pump to be removed from service and completely tore down in order to clean out the ball check areas.

Step in SolidPRO Pump!

Because the SolidPRO pump is designed to handle solids up to 2-inches and easy clean-out ports, it has quickly gained recognition as the preferred solids pump for DAF sludge.

SolidPRO pump installed at a plant.
Watch the SolidPRO pump used at a chicken processing plant.

Easy Clean-out Ports!

The SolidPRO clean-out cover plates enable access to the flapper check valves for easy flushing or cleaning.

SolidPRO valve plates for easy access.
SolidPRO valve plates for easy clean-out.

Waste sludge from the DAF system that does not have suspended solids can be transferred to a “plate and frame” filter press. The Yamada pump is another perfect fit when compressing solids with minimal energy usage.

Yamada pump used in a filter press.

Yamada has quickly become the pump of choice within the poultry and meat processing industry. Either handling the sludge off the dissolved air flotation unit, compressing sludge in the filter press, or transferring solid laden sludges to be a transport carrier, there’s a Yamada pump to fit into any waste water DAF system.