NS - Standard pump with free bare shaft

Open for anything

The standard pumps of the NS range have a drive casing with a free bare shaft, which allows all drive types to be mounted. The universal configuration of the drive systems offers maximum flexibility. The easy maintenance of the plug connection between the rotating unit and drive shaft simplifies replacement of the rotating wearing parts and the shaft seal.

Conveying Capacity
0.03–500 m³/h
0.132–2,200 US gpm
Pressure
96 bar
1,400 psi

Features and Benefits

Flexible

Thanks to the free bare shaft, it is possible to mount a wide variety of drive types – e.g. elastic couplings or V-belts

Easy maintenance

Simple maintenance without dismantling the bearing thanks to a quick-release plug connection between the unit and drive system

Low pulsation

Gentle, even pumping flow without dampeners or condensers – particularly suitable for sensitive pumping media

Flexible installation options

Depending on the on-site conditions, installation is possible in a horizontal or vertical position with a large, rotatable, spherical suction intake

Compatible

Available with various rotor/stator geometries and a wide range of different shaft seals – tailored to suit any conveying process

SCT retrofit option

Retrofit option for the particularly maintenance-friendly Smart Conveying Technology (SCT)

Technologies, accessories and options

Dry running protection / TSE

TSE monitors the temperature of the rotating stator and shuts down the pump when the limit value is reached to protect the pump from dry running.

Retensioning device

With this device, a worn stator can be evenly readjusted at several points so that the clamping between the rotor and stator is once again optimal and the pump performance increases.

Seal barrier system

This unit protects the shaft sealing by selectively supplying barrier liquid. Also available with flow meter on request.

Overpressure Protection

The pressure gauge switches off the pump as soon as a pre-set pressure is exceeded or not reached and protects the pump from increased wear and tear or piping damage.

Overpressure protection with bypass

A safety relief valve directs the medium into a bypass in the event of overpressure, thus reducing the pressure in the pump.

Standard base plate

Short base plate B with geared motor for all standard applications.

Base plate API 676

Particularly robust design with integrated drip tray; base plate for applications in the oil and gas industry.

Standard gland packing

Universal seal for hopper and standard pumps for sealing the plug-in shaft and suction casing or feed hopper. Also available with grease or lantern ring to shut off the media flow. Can also be supplied with upstream labyrinth seal and additional flush connection or lubricating device.

Single-acting mechanical seal

Universal standard mechanical seal for dosing, food applications and semi-submersible pumps for sealing the plug-in shaft in the suction casing or the hopper.

Multiple-acting mechanical seal

Mechanical seals arranged in a row. Available in "back-to-back", "face-to-face" or "tandem" sequence.

Cartridge mechanical seal

Ready-to-install pre-assembled units with supply connections and attachment brackets for quick replacement.

Universal joint sleeve protection

Stainless steel protective housing protects the universal joint sleeve from mechanical destruction by rough parts made of plastic, metal, wood, etc. Up to 10,000 operating hours guaranteed.

Pressure Branch

With gauge connection. Flange connections alternatively to DIN or ANSI.

Rotor

Wear resistant and corrosion-proof materials, with additional surface treatment.

Conventional geometry

With short pitches and a compact design, the conventional geometry produces high pressures.

6L geometry

With a small rotor diameter and a long pitch, the 6L geometry attains lower surface velocities and extends the service life due to its large sealing line.

Tricam geometry

The rotor with Tricam geometry features a three-helix geometry. This enables it to achieve larger conveying capacities with the same overall length of the pump.

Stator

The seal on both ends is moulded as an integral part of the elastomeric stator; corrosion of the stator tube is never a problem because the pumped liquid never comes into contact with the metal tube or the bonding adhesive. Available with optional adjustable stator retensioning device.

Conventional geometry

With short pitches and a compact design, the conventional geometry produces high pressures.

6L geometry

With a small rotor diameter and a long pitch, the 6L geometry attains lower surface velocities and extends the service life due to its large sealing line.

Tricam geometry

The rotor with Tricam geometry features a three-helix geometry. This enables it to achieve larger conveying capacities with the same overall length of the pump.

Equal Wall Stator

The stator with uniform wall thickness is used in situations with very high pressures or temperatures.

Tie bolts/screw

Corrosion proof, optional available in stainless steel design.

Coupling rod

For power transmission. Improved design, special designs optional available.

Suction casing

With large cross section and designed for smooth flow conditions, with drain plug and connections for pressure/vacuum gauge. Flange connections in DIN or ANSI can be rotated in 90° increments.

Joint connection

Consisting of just 5 components. Power transmission through wear resistant, hardened and replaceable joint parts: easily repaired.

Universal joint sleeve with holding bands

Protects the grease-filled joints from penetration of the liquid pumped, even in case of maximum vacuum or pressure loading. Streamlined design to reduce turbulence and NPSHr.

Shaft sealing

Gland packing with or without flushing/seal cage ring or single or double mechanical seals.

Plug-in shaft

Connects the drive shaft to the joint. With gland packing the plug-in shaft is used as a shaft protection sleeve. Upon request, it is available with wear resistant coating.

Plug-in shaft connection

For easy dismantling of the pump and drive enabling quick replacement of the rotating parts and shaft seals. The plug-in shaft pin secures the shaft connection to the drive and the splash ring protects the bearing from contamination/gland leakage.

Drive

Drive shaft and bearings can be lubricated. Open shaft end enables connection of various types of drives. Available with double bearing seals to prevent ingress of dust or moisture.

Lantern

A corrosion resistant design, optionally made of stainless steel, connects the pump and drive and secures the assembly to the base plate or skid.