We’ve all seen it in movies…prison inmates sneaking cigarettes and other contraband from one person to another while guards are not looking; and while these scenes from cinema may be highly dramatized, the reality is that goods do get smuggled throughout prisons and correctional facilities. One correctional facility located in the Great Plains region had to deal with the very real consequences of smugglers’ tape being flushed down toilets.
While there is great effort made to restrict the flow of contraband throughout a prison, this correctional facility struggled to keep unwanted materials from entering the sewage system. Tape, pieces of cloth, and other evidence of contraband smuggling were being flushed through the septic system and made their way into a wastewater sump located outside of the correctional facility. The wastewater sump had relied on two grinder pumps in a duplex arrangement to transport the raw sewage from the correctional facility through the sewer system to the local municipal wastewater treatment plant. The problem was that the smugglers’ tape, cloth remnants, and other debris had been frequently clogging the grinder pumps.
To alleviate the excessive clogging, the in-house maintenance team at the correctional facility installed catch baskets on the in-flow pipes. These baskets, which were designed with spikes to catch the large pieces of tape and garbage, had to be manually cleaned out three times each week – which was an absolute nightmare for the in-house maintenance staff.
The in-house maintenance staff talked with their plumbers and together they decided to look for different style pumps that could reliably handle the wastewater without clogging. They discovered submersible shredder pumps from BJM Pumps and selected the SK55C-208T for the following reasons:
- The SK Submersible Shredder Pump is engineered to shred solids. The SK55C utilizes a cutting impeller design with a Tungsten Carbide Tip to continuously rip apart solids against a tooth-edged spiral-shaped cover plate. With 360-degree shredding action and non-clog, two vane impellers, the SK55C has the capacity to shred the tape and other fibrous materials that were being flushed through the correctional facility’s sewage system.
- Proven to handle solids up to 3.5 inches in size, the SK55C could pump wastewater at 570 gallons per minute with a maximum of 54 feet of head.
- With a motor housing manufactured from 304 stainless steel, the SK55C is more resistant to corrosion and last far longer than pumps with cast iron, steel or aluminum motor housings.
- The BJM Pumps SK55C submersible shredder pump is constructed using a hardened ductile iron impeller and suction cover that can withstand pumping solids-laden wastewater; unlike pumps with standard cast iron or plastic components.
- The SK55C is built with “Three Seal Motor Protection”, which means that the motor is protected by double mechanical seals and an additional lip seal. In the double mechanical seal design, the lower seal faces are made of silicon carbide / silicon carbide and the upper seal uses cooler running carbon / ceramic. An additional lip seal is installed above the impeller to help prevent unwanted materials from entering the mechanical seal chamber. The SK55C also utilizes motor overload protection and (NEMA) Class F motor insulation, making it superior to pumps with Class A and B insulation. If the motor temperature and/or amp draw becomes too high, the motor overload switch “opens” and turns the pump motor off. The switch automatically resets when the motor cools, and the pump resumes operation.
The correctional facility purchased two SK55C-208T Submersible Shredder Pumps through their regional distributor in addition to slide rail assemblies. The slide rail assemblies were installed to make sure the in-house maintenance team could easily pull the pumps for future inspection and maintenance as needed. The slide rail assemblies and pumps were installed into the correctional facility’s wastewater sump in June of 2015 and have been running well since their installation. There have been no clogging problems with the SK55C submersible shredder pumps, and the in-house maintenance team was able to remove the catch baskets at the in-flow pipes.
When you have a pump that is clogging frequently, you may not have the right pump for your specific application. Frequent clogging can cause headaches and waste precious maintenance dollars. On the other hand, when your pumps are working the way they are supposed to, it frees up your maintenance team to focus on other demands throughout your facility.
Learn more about BJM Shredder Pumps.