The hydraulic elements of these pumps have their origins in OSNA’s range of horizontal centrifugal pumps. Although, these pumps are also available in multistage versions. OSNA’s vertical immersed pumps come mounted on a tank using a supporting plate, which is constructed as a tank cover. The supporting plate can also be constructed as gas-tight, round flange according to DIN, ANSI or other standards. The driver and the shaft seal of the pump are located above the tank.
A line shaft pipe connects the pump to the cover plate. This line shaft pipe can consist of either one or several segments, being constructed with intermediate pipes and shafts, bearings and shaft couplings. When using the hydraulic part of an end suction pump, the discharge pipe and line shaft pipe are separate components. In multistage pumps, the line shaft pipe also serves as the discharge pipe.
The main medium used for these pumps consist of clean water, boiler feeding water, condensate and cooling water (NMVN & GVN); Clean water or waste water in a low pressure range (SVN & SKVN).
Performance data:
The maximum pumping parameters, such as flow capacity and head, depend on the pump construction, operating speed, immersion depth, etc. For an accurate quotation for the best possible pump, we will need to know these details, along with any specific requirements you have.
Shaft Sealing:
This is as per your requirements or according to the pumping medium, with either gland packing or mechanical seal. The pumping medium allowing, a shaft seal may be omitted completely if line shaft and discharge pipe are separated.
Lubrication:
Friction bearings with pumping medium, with grease from automatic grease pump, or with fresh water. The antifriction bearing is lubricated with grease or oil.
Special constructions:
OSNA are highly skilled at delivering bespoke designs that are tailored to your exact requirements. Because of this, OSNA have delivered many pumps to the market in order to provide the best possible solutions for their customers. Twinned with Salvtech’s own expert knowledge and experience in pumping systems and process consulting, customers benefit from our combined expertise.
