Discharge Pumps
Discharge Pumps
Discharge pumps of the POLY series have an extra large inlet opening which guarantees a uniform product flow to the gears. The pumps can be used for a wide range of applications and also operate under extreme conditions such as vacuum or low NPSH conditions.
Modular system for discharge pumps
For WITTE discharge pumps, a wide range of modification options is available. Different inlet openings are available as well as low Npsh versions or various sealing variants. In addition, we offer a comprehensive range of additional services for our discharge pumps, such as regular maintenance, installation service in the system or on-site support during the start-up process.
Our pumps for the plastics industry:
- discharge pumps
- Reactor discharge pumps
- Pumps for reactor emptying
Conversion service for discharge pumps
Other makes of gear pumps from other manufacturers are rebuilt in our workshops and equipped with higher quality and more durable shafts, bearings and seals. This allows throughputs to be increased and maintenance intervals to be extended. A cost-intensive new acquisition can thus be avoided. We can supply these spare parts for many makes of other large, well-known manufacturers. Especially for large discharge pumps, retrofitting can lead to significant improvements in the process and the end product.
- Discharge pumps with suction pressures from vacuum to 10 bar and differential pressures up to 250 bar
- Discharge pumps with viscosities up to 40,000 Pas
- Discharge pumps from 4.7 ccm/rev to 25,000 ccm/rev Delivery volume
- Discharge pumps from 3 l/h to 52,000 l/h flow rate
- Discharge pumps for temperatures up to 350 °C
Applications of our discharge pumps
WITTE discharge pumps are suitable for the following applications.
Media to be conveyed and dosing of:
- ABS
- Biopolymere
- HIPS
- PA
- PBT
- PC
- PE
- PET
- POM
- PP
- PS
- SAN
Applications of our discharge pumps:
- Polymer process
- Polymer production
- Pre-polymer preparation
- Reactor discharge
- Melt conveying
Technical data of our discharge pumps
Technical fields of application:
- Viscosities up to 40.000 Pas
- Temperatures up to 350 °C degrees
- Differential pressures up to 250 bar
- Suction pressures from vacuum to 10 bar
Technical specifications:
- from 3 l/h to 52,000 l/h flow rate
- from 4.7 ccm/rev to 25,000 ccm/rev Conveying volume
Discharge pumps with delivery volume of:
- 4,7 ccm/rev
- 10,2 ccm/rev
- 25.6 ccm/rev
- 46,3 ccm/rev
- 92,6 ccm/rev
- 176 ccm/rev
- 371 ccm/rev
- 716 ccm/rev
- 1.482 ccm/rev
- .3200 ccm/rev
- 6.100 ccm/rev
- 12.000 ccm/rev
- 18.000 ccm/rev
- 25.000 ccm/rev
Discharge pumps with flow rates from:
- 3 - 56 l/h
- 6 - 92 l/h
- 15 -230 l/h
- 28 - 417 l/h
- 55 -722 l/h
- 105 - 1.370 l/h
- 222 - 2.890 l/h
- 430 - 4.700 l/h
- 900 - 8.850 l/h
- 1.920 - 17.000 l/h
- 3.660 - 32.000 l/h
- 6.590 - 58.000 l/h
- 13.000 - 40.000 l/h
- 17.000 - 52.000 l/h
Technical specifications:
- Vacuum threaded shaft seal
- blocked stuffing box
- blocked lip seals
- double locked mechanical seal
- Combinations of different sealing variants possible
- Heating with heat transfer oil
- Steam heating
Discharge pumps for the polymer industry
We can offer our discharge pumps in different versions, with square or round inlet or with shortened inlet flange. Alternatively, we also develop solutions that are precisely adapted to the system and the installation situation. Modified versions with the same footprint and double throughput are already in use at many customers. We can also consider the dimensions of a third-party product and replace it with a modified WITTE version.
Outlet Pumps
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