Process Pumps acc. to API 685 2nd Edition Type PRM / PRMW our ution contrib for mental environion protect

Volute casing Magnetic coupled DICKOW-pumps of the series PRM according to API 685 are heavy duty sealless pumps. The containment shell forms a closed system to separate the pumped liquid from the atmosphere by confined gaskets. The standard volute casing is cast en bloc and centerline supported. The equipment (including auxiliaries) is designed for a minimum service life of 20 years (excluding normal wear parts) and an uninterrupted operation of at least 3 years. Application Magnetic coupled PRM-pumps improve plant and personnel safety and reduce maintenance costs, because 90% of these costs...

Other available material options are: - Zirconium oxide (industrial ceramic) without eddy current losses. - PEEK composite (carbon fibre reinforced Polyetheretherketon) without eddy current losses. - Titanium for high pressure applications. - Segment containment shell with duplex segment rings (design SCS) or zirconium oxide tube (design SZCS) for high power and high pressure applications. The couplings are sized to fit the maximum power consumption of the rated impeller and allow also at least 5% increase of the installed impeller diameter. If nothing else is specified, the magnet coupling is...

internal circulation double sleeve bearing containment shell protection replaceable labyrinth seal heavy duty volute casing, centerline mount heavy duty bearing bracket oil lubricated impeller and casing wear rings containment shell closed impeller external magnets flanged drain confined gasket metal-to-metal fit internal magnets

Double sleeve bearings Wear rings The pump shaft is carried by wetted sleeve bearings. Standard material is pure Silicon Carbide with diamond layer, providing limited dry-run capability. SiC is highly resistant to corrosion and wear and can be used for all kind of liquids, also for solid containing products. The SiC-components are shrinkfitted and therefore protected against shock and thermal stress. Both sleeve bearings are bolted in one common bearing housing to grant a correct alignment. Renewable wear rings are furnished on both the casing and the impeller. Front and back wear rings are part...

Hot oil pump, type PRMW with air cooler For handling heat transfer fluids up to 400°C (750°F) the PRMW-design with air cooler reduces the fluid temperature in the magnet area to maximum 250°C (485°F) and keeps away dirt and pipe scale from the magnetic coupling. Pump with heating jacket, type PRM b For handling fluids with melting temperature above ambient. Design data for heating jacket 24 bar / 250°C (485°

Secondary control / containment Secondary control design Minimization of release of pumped liquid in the event of failure of the containment shell. Gas lubricated stand-by mechanical seal, design "CGS": gas lubricated mechanical seal bearing isolator containment shell drive rotor bearing bracket bearing bracket lantern intermediate flange leakage fluid - Gas seal can operate up to 24 hours in case of failure. - Occuring leakage in case of failure must be drained externally. - Leakage monitor is required. Secondary containment design Confinement of the pumped liquid within a secondary pressure...

Performance curves for the different pump sizes are available on request.

Technical changes reserved. Printed in Germany. 100-07.14 S&W