Centrifugal with volute pump NMWR

wateroildiathermic oil

Description
The NMWR is a volute casing pump (dimensions according to ISO 2858) with a permanent magnet coupling, designed for thermal oil applications. The split pot hermetically seals the pumped medium to the outside. The bearing housing with cast ribs serves as a cooling element, keeping temperatures in the split-pot area significantly below the inlet temperature in the volute casing. There is no internal circulation; plain bearings and a throttle section prevent exchange of contaminated product with the clean medium in the magnet chamber.

Important operational notes

• For higher eddy-current losses an additional cooling circuit is required.
• Cooling water is not required.
• The pump is not self-venting and must be vented via a venting device when the suction valve is open.

Design / bearings / sealing

• Magnetic coupling (permanent magnet coupling) as sealing; split pot hermetically seals the medium.
• Pump shaft: product-side SiC plain bearings.
• Drive shaft: oil-lubricated rolling bearings.
• Wear rings are standard on suction and discharge sides.
• Foot support and axially centered suspension are available options.

Applications

• Oil & Gas
• Chemical
• Petrochemical
• Offshore
• Shipbuilding / Marine
• Refueling stations & Aviation
• Industrial heating systems / heat transfer
• Tank farms / storage terminals
• Renewable energy / environmental technology

Characteristics / technical specifications

• Q max: 1400 m³/h (depending on size and speed)
• H max: 250 m (depending on size and speed)
• Operating pressure: 25 bar (higher pressures on request)
• Temperature range: up to 450 °C (higher temperatures on request)
• Max. speed: 3500 min−1
• Sealing: magnetic coupling
• Arrangement: horizontal
• Self-priming: no
• Bearings: rolling bearings (drive side), product-side plain bearings (SiC)
• Lubrication: oil
• Materials: ductile iron / cast steel
• Standards: ISO 15783
• Ex protection: Category 2 / Zone 1