ES Base Mounted

//ES Base Mounted
ES Base Mounted 2019-01-14T13:11:29+10:00
peristaltic pump

ES Base Mounted

The Gorman-Rupp ES Base Mounted sewage pump stations are pre-engineered packaged units with one, two or more sewage pumps, motors, all valves, interconnecting piping and can be supplied with or without controls and liquid level control systems. The sewage pumps in the station can either be Gorman-Rupp’s Super T or Ultra V Series sewage pumps. Flows to 250 l/s for a single pump can be achieved, and this can be expanded with self priming pumps, because only the suction line needs to be in the wet well [not whole pumps], so that 3 or more sewage pumps can be utilised. A variety of enclosures  are available to house the sewage pump equipment. Advantages include:

ES Base Mounted Sewage Pump Station – Video

50 Years of Gorman Rupp Lift Stations

Enclosures Base Mounted Pump Stations

Gorman-Rupp’s ES Base Mounted pump stations can be mounted in any type of enclosure that suits the surrounding environment. Enclosures can be brick, concrete or acoustically rated sheet steel.

Base Mounted pump stations

Base Mounted pump stations

Base Mounted pump stations

Lower Civil Costs

With a Gorman-Rupp engineered system, there is great potential to save on civil engineering and site work. Firstly, because the pumps are self priming, only the suction lines are in the wet well, so the sump can be significantly smaller [while delivering the same flow rate capability]. There is also no need to construct a separate valve vault/chamber and assemble all the valves into it as part of the installation procedure, because Gorman-Rupp systems are supplied with all the valves fitted.

The Gorman-Rupp packaged pump stations are pre-tested, completely assembled and ready for installation. Just place them, bolt them down, attach the suction and discharge lines, connect the power, and the job is done.

Fully equipped Base Mounted

With Gorman-Rupp packaged sewage pump stations, you only need to connect the piping, hook up the power…. and your station is ready to go.

With a Gorman-Rupp engineered system, there is no need to dig a valve vault, no need to install guide rails or discharge elbows in the wet well, and no need to integrate all of the systems on site when all the equipment arrives in pieces. Your Gorman-Rupp ES Base Mounted pump station is fully equipped and ready to go. This includes:

  • Sewage pumps
  • Pump motors
  • Isolation valves
  • Non-return valves
  • Air release valves
  • All inter-connecting piping
  • Suction and discharge gauges to monitor pump performance
  • Motor control centre
  • Liquid level control system
  • Ventilation
  • Internal lighting
  • All equipment is ready to mount into an existing or purpose built enclosure
  • Complete system testing prior to the station leaving Gorman-Rupp
  • 5 Year warranty on everything within the station

Lower Operational Costs

A Gorman-Rupp engineered system will save the asset owner many thousands of dollars [when compared to the submersible pump alternative] over the life of the pump station. The reasons are many:

  • Access and maintenance are much easier for operators, because the pumps are at ground level and much easier to access.
  • The pumps themselves are the easiest to maintain in the industry. Just 10 minutes for one operator to adjust internal pump clearances [on both pumps] is just one example of this.
  • Pumps can be set up with a “self cleaning wet well” so that the contents of the wet well can be removed with every pump cycle [including fat and silt]. This reduces the need for “sucker trucks” to remove silt and fat build-up, because the Gorman-Rupp system can greatly slow down or eliminate this build-up from happening. Solving the problem, not treating the symptom is the answer to this often problematic occurrence.
  • Very long pump service life when compared to submersible pumps.
  • No guide rails or discharge bends to ever replace.
  • No real need to ever open the wet well lids. This means the number of operators needed to attend site for blockage removal or maintenance can be reduced.
  • Operators can trouble-shoot much easier with pressure gauges than amp readings. Pumps do pressure, not amps. Motor amp readings can be misleading, whereas gauges on the suction and discharge of a self priming pump will tell operators exactly where any issue lies. This cannot be said for amp readings on submersible pumps.
  • No false call-outs because of pump seal moisture detectors. Self priming pumps don’t have or need them.

Reduced WH&S

Using Gorman-Rupp self priming pumps can reduce WHS issues associated with pumping applications. Because pumps are located at “ground level”, high and dry above the wet well [not in it], pumps are easily accessed by operators for monitoring, maintenance or repair. Some of the identified risks that can be reduced or eliminated include:

        • Working over water
        • Working at heights
        • Working with cranes
        • Working with heavy swinging weights

Other OH&S issues can also be eliminated with the use of self primers. Unlike submersible pumps, self priming pumps do not need guide rails and discharge base elbows that will need service and replacement over the life of the installation, requiring confined spaces entry and the associated dangers. Submersible pumps also need chains to raise them to the surface. These chains can become corroded and weakened over time, creating a potential danger to operators lifting them.

Easy Access

Because Gorman-Rupp self priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids (exposing operators to “working at heights” and “working over water”) and winching or craning pumps to the surface (exposing operators to “working with swinging weights”), operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry well” which is accessed by going down stairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers.

Pump Station Controls

Although our Gorman-Rupp packaged pump stations can be supplied “less controls”, we can provide controls that are intuitive and designed specifically for self priming pumps. PLC based controls with simple touch screen interface is combined with pinpoint precision start/stop set points for one or more pumps. Controls can be supplied with DOL starters, soft starters or with VFD’s. Advantages of using Gorman-Rupp designed controls are as follows:

  • All components in Gorman-Rupp pump stations are warranted for 5 years [including the controls].
  • The controls are purpose built for self priming pumps.
  • Controls can incorporate an air bubbler liquid level control, improving reliability and safety.
  • Touch screen interface is very intuitive and easy to operate.
  • Locally supported in Australia

Level Control System

Gorman-Rupp engineered systems can be supplied with all of the usual level control systems, but our preference is for the safest and most advanced “air bubbler system”. The principle involves pumping a low volume of air into a tube, which runs down into the wet well. The pressure is accurately measured using a pressure switch. At a fixed density, the hydrostatic pressure remains proportional to the level of water in the wet well. This measurement technology is used anywhere that reliable liquid measurement is required.

The compact compressor/pressure switch device is located in the control panel “high and dry” out of the wet well. Only the air tubing and the air enter the wet well. Advantages include:

  • No opening wet well lids to access the level control device [like ultrasonics, submersible transducers or floats].
  • Measurement not affected by surface foam, mist or suspended matter.
  • Reliable measurement over the long term.
  • Long compressor life
  • 24V power supply
  • Quick release connection terminals
  • Maximum margin for error 0.3%

Steep System Head

When using Gorman-Rupp’s pump stations, a wide range of pumping solutions is available. One of these is the unique “parallel/series” piping arrangement that is only possible using self priming pumps. With this arrangement, pumps can alternate as is the usual case for sewage pump stations, but when a single pump can’t keep up with the inflow and the 2nd pump is required to “assist”, this is where the unique set-up comes into play. When two pumps operate together with this unique piping arrangement, the two pumps pump in series (not parallel)!!

This system has the capability of overcoming the losses normally associated with long or undersized rising mains (without “forcing” the pumps to operate outside of acceptable operating areas of their performance curve). It is also a good choice if more than one pump station uses the same rising main.