Could package submersible pump stations make your job easier? Submersible pump stations have many benefits when installed in waste water systems. Allied Pumps has been providing submersible pump station solutions for over 30 years.
Submersible pumps are efficient. The pump works with the rotation of the impellers sucking water into the body of the pump. As the impellers continue to move, the liquid is pushed out of the pump, through associated pipework to a gravity sewer main.
It is important to have an easily accessible dry valve chamber as Recommended in the Water Corporations Private Sewer Pump Station Guidelines. The valve chambers are formed as part of the main chamber and the valves preassembled in the discharge pipework.
Besides protecting the valves from corrosion, the user can operate the uncontaminated valves without risk of comprising hygiene or safety by having to reach into the pit.
In the event of mechanical or power failure, the submersible pump station should have emergency storage. It is a Water Corporation suggestion that this storage volume should equal three hours of average daily inflow. Essentially, this three hours will allow a technician or service to attend site or make alternative arrangements.
With a range of large diameters available, the emergency storage can be efficiently contained in the station.
This capacity should be between the “high level sensor” and the inlet pipe. This is important as the “high level sensor” will raise the alarm and this will be the first warning to the user that the pump station is malfunctioning. Where cases require higher storage volume, a secondary storage tank can be installed beside the pump station.
In some remote sites, it may be suggested to increase the emergency storage if it will take longer than 3 hours for a technician to be able to attend site. It may be worth factoring in the additional costs if your pump station overflowed.
Pump stations should remain as empty as possible at all times. By keeping a pit empty, the system has the greatest capacity to absorb any peak flows or emergency storage and prevents waste turning septic. Most pump stations operate with a minimum of three level sensors.
The lowest “Pump OFF” sensor should be located at the top of the pump, this is positioned as low as possible but keeps the pump submerged for cooling. In pump stations, the middle sensor (Pump ON) can be mounted 100-150mm above the lowest sensor. The setting of the middle switch may need to be raised if it is expected that the pump could start more than 20 times in an hour.
The high-level sensor can be mounted again 150mm above the “Pump OFF”, by keeping the level sensors close together, a fault or breakdown can be quickly realised.
These sensors are designed to gauge operation and are the first line of notification should there be a breakdown.
Submersible pumps can handle both solids and liquids without faltering. However, there are many things that can cause blockages, for example flushable wipes and other miscellaneous objects. These are constant sources of frustration for pump owners. To address blockage issues, pump manufacturers commonly incorporate cutting devices into the design, this reduces the size of the solids, which then allows the material to pass through the pump. There are a number of different grinder and cutter options available, depending on your requirements.
Grinder pumps have a narrow inlet where the rotating mechanism grinds solids into a fine slurry. Grinders macerate solids and can cope with some of the toughest materials in the stream, but may absorb more power and usually pump lower flows. We suggest using grinder pumps for public venues, commercial, industrial and other high use facilities.
Cutter pumps work in a similar way to grinders. A cutter pump’s impeller drives the rotating cutter against the stationary element, which is mounted at the pumps suction inlet. As solids enter the pump, the cutter shreds the materials, allowing them to pass through the pump. Cutter pumps are a lower cost option to the grinders; however, they are less efficient at reducing solids, which is why the typical use is domestic situations. The owner must be prepared to oversee what is discharged into the system.
Submersible pump stations are available as a complete package. They are cost effective and pre-fabricated to exact specification, reducing site work costs and installation time as the major components are stocked allowing for fast turnaround.
Submersible pumping stations are a great solution for a variety of domestic, industrial and commercial applications. These stations can be engineered to deal with a variety of needs from low usage requirements to multi-use locations. Learn more about Allied Pumps submersible pumping stations offerings today.