MD - Metering Pump for precise metering and dosing

Designed with threaded connections for general metering applications

MD Range progressive cavity pumps are used in virtually all industries for metering and dosing precise quantities. They are particularly good for minimal pulsation conveyance of thin to viscous fluids, as well as corrosive media containing solids.

Conveying Capacity
0.06–1,000 l/h
0.053–264 US gph
Pressure
24 bar
350 psi

Features and Benefit

Economical

Reduced costs due to inexpensive rotating unit

No vapor locking

Cavity design allows for conveyance of liquids, solids, and gases

Ease of operation

Valveless flow control for ease of operation

Performance efficiency

Low slip (internal back flow) provides performance efficiency and less wear on components

Easy maintenance

Simple and predictive maintenance due to minimal components

Durable

High corrosion resistance due to the variety of components made of Hastelloy C or Titanium

Exact Dosing

High dosing accuracy (deviation only +/- 1%)

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.

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.

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.

Multiple-acting mechanical seal

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

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.

Pressure branch

In stainless steel, 1/2" connections to DIN EN ISO 228-1 or NPT.

Stator adapter

In stainless steel, enabling the use of all sizes of rotor/stator giving inter- changeability with only one housing and drive unit.

Rotor

Wear resistant and corrosion-proof materials.

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.

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.

Drive

Geared motors, variable speed drives or frequency controlled motors of all major manufacturers, directly flanged to the pump without additional couplings or guards. Covers made of stainless steel are available.

Base plate

Tailor-made selection of base plates. The base plates can be easily combined with different drives from all major manufacturers.

Suction casing

In stainless steel, 1" connection to DIN EN ISO 228-1 or NPT, can be rotated in 90° increments, with drain plug, available with gauge or flushing connections.

Coupling rod

With two pin joints with hardened and wear resistant components, easily assembled, grease lubricated and positively sealed with elastomer sleeves and two holding bands.

Shaft sealing

Single acting mechanical seal. Alternatively, a double acting mechanical seal or gland packing are available.

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.

Lantern

For connection of pump and drive and to secure the assembly to the base plate or directly to the foundation.