Itt Industries, Inc.

Flygt Ab

Valdemar Carlsson

Boris Fredriksson

Balint Szendroi

A device is provided for obtaining automatic circulation in waste water pump stations. At the pressure side of the pump unit, there is a valve which opens during certain times to form a connection between the pump and the pump station to create a circulation. The valve is opened and closed by means of communicating bellows which are controlled by the pressure difference between two sections in the valve having different areas.

Device for automatic circulation in a waste water pump station

A pump impeller to be used when pumping liquid containing solid bodies. The impeller is provided with one single vane designed with a hollow for balancing the impeller. The hollow is connected to the surroundings via a slot at a point where the vane has its maximum diameter. The impeller is then perfectly balanced when rotating in liquid as well as in air.

Centrifugal pump impeller

A device for transporting lubricant to the mechanical sealds in a submersible machine includes a funnel shaped guide means arranged on a rotating shaft in an oil room. Oil will be sucked in at the small end of the guide means and flow out at its big end thus obtaining a transport of oil.

Mechanical seal lubrication device

The pump unit (2) is provided with a valve (6) at the pressure side, which is arranged to open a connection between the pump and the pump station thus obtaining a circulation. The valve is arranged at the upper side of the pump housing and the outlet of the valve is directed opposite to the flow direction (A) in the pump housing (4) thus minimizing the risk of clogging.

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Solna, Sweden

Valdemar Carlsson