Centrifugal with volute pump NHX

for hot waterwaterself-priming

Description
The NHX type is designed for use in medium and large hot-water systems. It is a single-stage volute pump with an axial suction nozzle and a centrally mounted, vertical upward discharge nozzle. The design of the DICKOW hot-water circulation pump is based on long-standing experience in the hot-water sector and ensures reliable operation.

Cooling and degassing system
The DICKOW patented cooling and degassing system maintains moderate temperatures in the plain-bearing area and ensures a stable liquid film in the mechanical seal gap.

Operation and maintenance
The pump is self-priming and requires no external air or water cooling. No personnel-intensive external interventions are necessary. High bearing temperatures are prevented even under extreme loading conditions. Lowest life-cycle costs through efficient hydraulics and low maintenance effort.

Applications

• Chemical industry
• Petrochemical industry
• Offshore
• Shipbuilding / Marine
• Industrial heating systems / Heat transfer fluids
• Renewable energy / Environmental engineering

Documentation
Brochure (German & English) and sectional drawing (German & English) available.

Performance curves
Characteristic curves for various speeds available (including 1450, 1750, 2900, 3500 min−1).

Characteristics / Specifications

• Type: NHX (single-stage volute pump with mechanical seal for hot-water applications)
• Q max: 1400 m³/h (6160 g.p.m.)**
• H max: 220 m (722 ft)**
• Operating pressure: 40 bar (580 psi)*
• Temperature: 220° C (428° F)*
• Max. speed: 3500 min−1
• Sealing: mechanical seal
• Arrangement: horizontal
• Self-priming: yes
• Bearings: rolling bearings, plain bearings
• Lubrication: grease
• Materials: spheroidal cast iron / steel casting
• Standards: DIN EN ISO 2858, ISO 5199
• Ex protection: Category 2 / Zone 1
• * higher pressures and temperatures on request
• ** dependent on size and speed