This website uses cookies

Cookies facilitate us providing this website. Some cookies are essential, and the site won't work as expected without them. These cookies are set when you submit a form, login or interact with the site by doing something that goes beyond clicking on simple links.

We also use some non-essential cookies to anonymously track visitors or enhance your experience of the site. If you're not happy with this, we won't set these cookies but some features of the site may be unavailable.


Axial flow centrifugal pump in metal

Horizontal chemical circulating pump type RSU is designed for high flow rates at relatively low heads. By using specially designed screw impellers or propellers in Siguss is excellent suitability for the circulation of different acids, e.g. for the evaporation of spent and contaminated sulphuric acids as well as for the concentration of raw phosphoric acid. In order to achieve a sufficiently resistant - usually difficult to cast and machinable - materials, armoured versions are available.

Design Features


Axial flow pump




DN 250 - DN 500



Delivery rate

Qmax. = 3.400 m3/h

Delivery head

Hmax. = 6 m


-40 °C to 150 °C

Nominal pressure

6 bar

Circulation of acids in a wide variety of concentrations, temperatures and solids contents, old or weak contaminated acids in condensation and upgrading plants.


ISO 5199


Horizontal, single-stage

Casing design

Cast pipe elbow



Bearing lubrication

Grease lubrication

Installation versions

Base plate, base frame or unfounded installation

Motor coupling

Direct coupled or with V-belt drive

Ambient temperature

-20°C to 60°C

Solid content limit value

approx. 35 %

Hydrodynamically, pneumatic stationary seal