Centrifugal pump NML

for hydrocarbonsfor chemicalsmagnetic-drive

Description
Type NML is a PN16 chemical process pump built to ISO 2858 with a magnetic coupling. Sizes adapted from the standard performance curve and tailored to operator requirements are arranged to provide efficient operation across the duty range.

Magnetic coupling and construction
The pump is equipped with a permanent magnet coupling; the containment shell hermetically separates the pumped medium from the exterior. An internal circulation flow evacuates heat generated by eddy current losses.

Bearing and sealing
The pump shaft runs in SiC sleeve bearings; the drive shaft is supported by grease-lubricated rolling bearings. Wear rings are standard on suction and discharge sides. Axial thrust is balanced by relief holes, back vanes or other measures as appropriate.

Applications

• Oil & Gas
• Chemical industry
• Petrochemical
• Offshore
• Shipbuilding / Marine
• Refuelling installations & Aviation
• Tank farms / terminals
• Renewable energy / Environmental engineering

Notes
* Higher pressures and temperatures available on request.
** Performance data depend on size and rotational speed.

Properties / Technical specifications

• Type designation: NML
• Design: single-stage chemical process pump to ISO 2858 with magnetic coupling
• Q max: 500 m³/h (2200 g.p.m.)**
• H max: 250 m (820 ft)**
• Operating pressure: 16 / 24 / 40 bar (232 / 348 / 580 psi)*
• Temperature range: up to 200 °C (392 °F)*
• Max. speed: 3500 min−1
• Sealing: magnetic coupling
• Installation: horizontal
• Self-priming: yes
• Bearings: drive side rolling bearings, product side sleeve bearings (SiC)
• Lubrication: grease (permanently greased)
• Materials: Duplex, Ni-based alloys, spheroidal/ductile cast iron, forged/ductile steel, austenitic cast steel
• Standards: DIN EN ISO 2858, ISO 15783
• Ex protection: Category 2 / Zone 1