Chemical pumps [CHEM] - Individual types & designs

Gear pumps for chemical applications

CHEM gear pump to transport and dose low to medium viscous media.

The application range reaches from classic transfer and dosing tasks in the chemical and pharmaceutical industries to the transportation of monomers, oligomers and prepolymers during polymer production. Through decades of construction experience and optimal material selections, these chemical pumps are suitable for even the most difficult of tasks and maintain their reliability and dosing accuracy in vacuum and high-pressure applications. Typical areas of application for this pump type can be found in the chemicals, cosmetics, food industries, petrochemicals, and polymer industries.

WITTE chemical pumps from the CHEM series can be operated horizontally, vertically and also as submersible pumps lowered in medium.


Design variants for chemical pumps

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Advantages at a glance:

  • Seals
  • Housing
  • Gear Shafts
  • Spacer rings
  • Bearings

  • Seals

    Different seal variations for the secure and non-leaking operation of the pumps and for difficult applications, conditions and processes.

  • Housing

    The housing for the CHEM series can be offered in different materials such as stainless steel, ceramic or titanium and other special materials.

  • Gear Shafts

    Different designs and materials are possible.

  • Spacer rings

    The axial clearance from the CHEM series is set through spacer rings

  • Bearings

    Bearings from the CHEM series are made of carbon in the standard version. A wide range of materials aer aviable for special applications.

CHEM - Chemical pump for reliable conveying and metering tasks

Technical data

Unalloyed and alloyed steel · Tantalum · Titanium · Hastelloy® · Ceramics
Gear Shafts
1.4112, but also all other processed ceramic and metal materials, such as 1.4571, Ferralium®, Ferro Titanite®, Hastelloy®, etc. · optional with coating · gearing
Axial shaft seals
Single internal, single external or double mechanical seal · Stuffing box · Magnetic coupling
Steam · Water · Heat transfer oil · Electric
Friction bearing
Carbon · NiAG (nickel silver) · Silicon carbide · Zirconium oxide · Tool steel · Aluminum bronze · Special materials · optional with coating

Operating parameters

0,5 to 1.000.000 mPas
Up to 300°C · higher temperatures on request
Suction pressure
Vacuum up to max. 15 bar, magnet drive also higher
Transport pressure /differential pressure
Up to 120 bar
Pump sizes
From 0.2-9-5.5 to 12,000-280-280

Application examples for WITTE chemical pumps from the CHEM series

Organic and inorganic chemicals
Alcohols · Additives · Bases · Ester · Glycerin · Resins · Hardeners · Isocyanate · Monomers · Oils · Phenols · Acids · Biodiesel · Asphalt · Bitumen · Tar · Hotmelt · Adhesives · Wax · etc
Cellulose · Nylon 66 · Prepolymers · etc.
Vegetable oils · Butter · Margarine · Flavoring · Chocolate · Fondant · Licorice · Chewing gum mass · Vitamins · Syrup · Gelatin · etc.
Pharmaceutical and cosmetic products
Amino acids · Lotion · Shampoo · Vitamins · etc.
Other medium
Cellulose · Hotmelt · various adhesives

Heating variations [CHEM] chemical pumps

This pump type can be designed as heated or unheated. 3 heating variations are available to choose from. Hydraulic heating can be offered in a standard or premium design. Alternative heating with heating cartridges, therefore electric, is also possible.


Seal variations for CHEM chemical pumps

References chemical pumps

CHEM Mini chemical pump from WITTE
CHEM - Gear pump from WITTE
Chemical pumps Gear pumps from WITTE
Picture of a CHEM gear pump