Standardized chemical pump NP and close-coupled chemical pump NP-B

Horizontal centrifugal pump with volute casing and single-entry, single-stage radial Impeller. Casing and fitting dimensions to EN 22858/ISO 2858, complemented by size 40-25-125, 250-200-400 and 300-250-400 pumps.

Description

Type NP/NP-B standardized chemical pump

The NP pump series is excellently suited to pumping tasks in the chemical industry, electroplating plants, metallurgical industries, steel and stainless steel pickling lines, evaporation and regeneration units, wet flue gas cleaning systems downstream of waste incinerators as well as in exhaust air scrubbing and industrial waste water treatment. The MUNSCH REA mechanical seal, specifically developed for non-metallic pumps, ensures maximum operating reliability and a long service life while being easy to assemble and repair. The main construction material of the mechanical seal is silicon carbide. No other material offers better corrosion and wear resistance.

Good reasons for Munsch NP or NP-B series pumps

Corrosion resistant plastic casing

Sturdy, single-piece plastic casing and solid casing cover provide diffusion-tight containment, eliminating secondary sealing problems; superior mechanical wear resistance for maximum operating reliability in chemically aggressive and abrasive environments.

Corrosion resistant plastic casing

Sturdy, single-piece plastic casing and solid casing cover provide diffusion-tight containment, eliminating secondary sealing problems; superior mechanical wear resistance for maximum operating reliability in chemically aggressive and abrasive environments.

Silicon carbide seal rings

Rotating and stationary seal rings are fabricated from this advanced silicon carbide, that not only offers extreme abrasion resistance but is also resistant to virtually all acids and alkalis.

Various impeller designs

Impeller available in closed and semi-open designs.

Options

  • Continuous flushing
  • Shutdown flushing
  • Spring chamber flushing
  • Volute casing drain

Technical Data

Series Pump capacity [Q]  Differential head [H] Operating temperature [t] Operating pressure [p] Discharge nozzle Motor rating
NP up to 1.200 m³/h up to 100 m from -20°C to +110 °C up to 10 bar DN 25 to DN 250 up to 200 kW
NP-B up to 160 m³/h up to 70 m from -20°C to +110 °C up to 10 bar DN 25 to DN 100 up to IEC size 132

Industries

Pumps and Metering Systems for Distillation Plants and Applications in Refineries

Crude oil must be cleaned, separated, and converted (refined) until the final products suitable for sale are made (e.g., gas, diesel, heating oil, lubricants, propane, butane). LEWA supports you with pumps and metering systems, which are used in the refining process during chemical metering. Application with our products are distillation plants, coker, cracker, or visbreaker, for example. Ask our experts for more information!

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Pumps and Metering Packages for the Petrochemical Industry

We have supplied durable pumps and metering systems for applications such as the hydrocracking process for over 50 years. Petrochemicals generate starting products for the manufacture of plastics, pharmaceuticals, colorants, detergents, and other products. Contact our experts and allow us to provide you with detailed information about metering and pumping solutions for the hydrocracking process!

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Chemical Pumps and Metering Packages for the Chemical Industry

When critical, environmentally hazardous, toxic, or flammable fluids and suspensions need to be reliably conveyed or metered in high-pressure processes, there is no alternative to hermetically sealed metering pumps, process diaphragm pumps, and metering systems from LEWA. Hermetically sealed LEWA pumps with pressures up to 1200 bar are the first choice for the production of chemical intermediate and end products. Contact our experts and let us advise you about your individual chemical pump or system solution!

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Pumps and Systems for the Plastics Industry

We offer you special expertise for all compounding processes in the plastics processing industry (addition of waxes, flame retardants, and lubricants). Contact our experts! We're happy to give you advice about metering and pumping solutions for the plastics industry such as in polyethylene processing.

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Pumps and Systems for the Production of Personal Care Products

Processes with strict quality and hygiene requirements, such as GMP or the need to avoid preservatives, require the right equipment. We support you in the selection and the design of hygienic components and systems for producing personal care products. Contact our experts and let us advise you – we will work with you to develop customized metering solutions for your process, such as for manufacturing personal care products.

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Pumps and Metering Systems for Other Industries

LEWA offers customized solutions and references for almost all industries in which processes require exact metering or the reliable conveyance of fluids. As specialists in fluid handling, we of course also have experience in areas outside of our key markets.

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Applications

Amine treatment

At LEWA, you receive pumps and systems for amine treatment in power plants. Ask our experts for more information.

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Polymerization

LEWA manufactures metering pumps and metering systems for polymerization which optimally meet the necessary requirements. We are happy to help.

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Production of biodiesel

LEWA provides metering systems for producing biodiesel and other biofuels. Consult us!

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Dilution of surfactants

Dilution of surfactants such as sodium lauryl ether sulfate (SLES) with LEWA pumps during production of detergents.

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