What is the need for stators

Accessories and additional devices for pumps & systems

The ideal addition for the different demands on NETZSCH products

Dry run protection for NEMOLAST® Stators

The dry run protection (STP2A, STP2D) continuously monitors the surface temperature of the stator while the pump is in operation. If the preset switch-off temperature (s) is exceeded, for example due to dry running, a signal is sent to the motor control - and the pump switches off. This reliably prevents damage to the rotor and stator. A second switch-off temperature can be preset using the controller: the first switch-off temperature for dry-running protection if the pumped medium is missing, the second switch-off temperature for dry-running protection if the medium temperature changes (when cleaning).

Flow monitor for solid stators

The flow monitor is used for solid stators. This device is installed in the immediate vicinity of the pump, either in the suction or pressure line. If the flow is insufficient, the flow monitor sends a signal to the motor control and the pump switches off.

Speed ​​monitoring unit

Some processes require monitoring of the speed of rotation of the pump. For this purpose, NETZSCH offers pulse switches that are attached to the drive unit. The shaft can be equipped with one or more contacts to measure the desired number of pulses per revolution. This unit is stably and securely mounted either on the lantern or the bearing bracket of a pump.

Contact pressure gauge with G3 / 4 inch diaphragm seal

The operating pressure is displayed on a manometer. The pressure measuring device is safely separated from the medium by a stainless steel membrane. The G3 / 4 inch contact pressure gauge is suitable for use with low to medium viscosity media. If the maximum permissible pressure is exceeded, the pump switches off automatically, whereby the switch-off pressure can be set individually.

Contact pressure gauge with flange diaphragm seal DN50 PN40

This diaphragm seal differs from the G3 / 4 inch by the open measuring flange DN50. Due to the large nominal diameter of the measuring flange, the pump can be reliably protected from overpressure even with highly viscous, puncture-resistant media that tend to clog.

Pressure control device DTSL 3

The operating pressure is displayed on a manometer and elastic diaphragms safely separate the pressure measuring device from the medium. If the maximum permissible pressure is exceeded, the pump switches off automatically, whereby the switch-off pressure can be set individually. This pressure control device is also optionally available with a differential pressure switch for switching on / off.

Multifunctional pressure monitoring unit

In addition to a display that shows the current pressure of the pump, it is possible with this device to set additional alarm and switch-off points in the event of overpressure.

Quench tank

If a shaft seal is operated with quench and this quench space is permanently flushed with liquid, dry running of the shaft seal can be reliably prevented. The use of a quench container can also reliably prevent the medium from crystallizing out in contact with the atmosphere.

Permanent lubricator

The permanent lubricator is used for shaft seals where a grease seal supports the sealing function. This can be the case with stuffing box packings with a grease chamber ring as well as with mechanical seals with a quench chamber. The job of the permanent lubricator is to continuously keep a grease reservoir under pressure in the grease chamber ring or quench chamber by means of a pretensioned spring. A shut-off device on the permanent lubricator can be activated when the pump is at a standstill.

Pressure flushing for double-acting mechanical seal

When using a back-to-back mechanical seal, it is imperative to provide a sealing water supply unit for the seal. It must be ensured that the barrier pressure applied to the mechanical seal is at least 2 bar above the pressure prevailing in the suction casing. In addition, the flow rate in the barrier chamber must be checked. The pressure and flow monitoring system is mounted on the pump to save space.

Filling device for K and Z joints

For the correct operation of K and Z joints, they must be filled with the lubricating oil specified by NETZSCH in the operating and maintenance instructions. Complete and fast filling is only guaranteed via the filling unit with oil container, pump unit and hoses.

Ring nozzle

When pumping solid media, we recommend using our lubricant injection system to reduce the pressure loss in the pipeline. This is attached directly behind the pressure port of the pump. Depending on the lubricant, this lubricant injection system reduces the friction loss, which reduces the delivery pressure by up to 70%. The use of a ring nozzle can significantly reduce both investment and operating costs.

Adhesive dowels

We recommend the use of adhesive dowels to ensure that the base plate is securely fastened to the floor. The anchor is anchored in the ground with a 2-component adhesive. After a short hardening time, the dowel is connected to the floor material, so that the base plate can then be installed together with the pump.

Stator puller

This tool is used to dismantle and assemble the stator. We recommend using the strap wrench up to pump size NM 045. From pump size NM 053 we recommend the use of the chain wrench.

Machine feet

To protect the floor surface when setting up the base plate together with the pumps, spherical feet are mounted directly on the base plate. This arrangement has the advantage that there are no cavities, and therefore no bacteria accumulation, and the pump can be set up hygienically. The floor area under the base plate is easy to clean thanks to the machine feet. In addition, the tiled floor is not damaged, as is the case with dowels, for example. In addition, the threaded spindles in stainless steel compensate for uneven floors.

Driving devices

For pumps that are used at different locations, we offer a wide variety of travel devices.

Cover hoods for drives

For units whose electric drives require special protection, we offer cover hoods in various stainless steel designs for the drive. A necessity may exist especially in wet areas, as protection against splashing and condensation water in case of dripping pipes. Further examples of the sensible use of a cover are protection against accidental contact with hot drives, weather protection for outdoor installations, optical reasons or the covering of the rotating drive shaft in the pump lantern.

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