PSIL’s range of VS4 and VS5 pumps are custom-engineered to meet clients’ process requirements, building on a proven design base specification achieved through decades of research, development, testing and operational use.
Ensuring that each pump can be put into service and run with minimal maintenance requirements during its design life is a crucial element of the manufacture of each PSIL product.
Effective length
VS4 vertical pumps with intermediate bearings can be supplied beyond 8 metres long, lubricated either by pumped fluids, separate water flush, oil or grease. VS5 pumps without intermediate bearings in cantilever shaft form can be supplied up to 2 metres long.
Hydraulic ends
Designed for heavy duty use, single volute, double volute and diffuser ring designs area available, alongside Vortex products designed to handle large solids concentrations or in low-shear applications.
Top Bearing Housings
Combined thrust and radial bearings, grease-lubricated, are fitted to absorb thrust and radial loads.
Impellers
Open, semi-open and shrouded designs are available, all designed to meet or exceed minimum NPSH requirements.
Shafts and sleeves
Our engineers design shaft and span of intermediate bearings so that operating speeds and critical speeds are well-separated, with bearing spacings lower than that mandated by API610.
Intermediate Bearing Brushes
Spaced to provide stability and smooth-running. Fluted bushes are made in materials selected to suit each application — from bronzes, carbon and rubber to PTFE composites.
Support Plates
The support plate, through which a pump is anchored, can be manufactured square or circular dependant on operational design requirements in steel plate, which cladding with stainless steel, nickel alloys or titanium are optional.
Sealing
No sealing is generally required where a shaft passes through the support plate, above the high liquid level however, lip seals, packed glands, single or double mechanical seals and dry-running gas seals are available as options.