CHEM gear pump for conveying and metering of fluids with low medium viscosity. The application range goes from classic transfer and metering tasks in the chemical and pharmaceutical industries up to the conveyance of monomers, oligomers and prepolymers during the production of polymers. Decades of experience in construction and an optimum selection of materials, make this type of chemical pump suitable for even the most demanding tasks and are outstanding in their reliability and metering precision in both vacuum and high pressure applications. Typical areas of application for this type of pump are to be found in the chemical, cosmetic, food, petrochemical and polymer industries.
The CHEM series is also suitable for the food industry, e.g. for conveying butter, margarine or vegetable oils.
Chemical pumps of this type can be supplied with or without heating.. The WITTE modular construction system for friction bearings, gear and shaft seals offers a maximum of flexibility for the end customer.
Non-alloyed and alloyed steels · tantalum · titanium · Hastelloy · ceramic
1.4112 but also all other processable ceramics and metals, e.g. 1.4571, Ferralium, ferro titanite Hastelloy, etc. · with optional surface coating · spur gearing
Carbon · NiAg (nickel-silver) · silicon carbide · zirconium oxide · tool steel · Al-bronze · special materials · with optional surface coating
Single mechanical seal (ED) · Single mechanical seal with buffer fluid (AD) · Double mechanical seal with buffer fluid (DD) · magnetic coupling · stuffing box · viscoseal
Steam · water · heat transfer oil · electrical
0.5 to 1000000 mPas (cP)
Up to 300°C (580°F) · higher temperatures upon request
Vacuum of max. 15 bar (215 psig), higher with magnetic drive
Conveying Pressure / Differential Pressure
Up to 120 bar (1740 psig)
The values listed are maximum values and must not coincide under certain circumstances.
From 22/6 (1.28 ccm/rev – 20 l/h) to 280/280 (12000 ccm/rev – 170000 l/h).
Organic and inorganic chemicals
Alcohols · additives · bases · esters · glycerine · resins · hardeners · isocyanates · monomers · oils · phenol · acids · biodiesel · asphalt · bitumen · tar · hotmelt · glues · waxes · etc.
Celluloseacetate · Nylon 66 · prepolymers · etc.
Vegetable oils · butter · margarine · flavourings · chocolate · fudge · liquorice · chewing gum · vitamins · syrup · gelatine · etc.
Pharmaceutical and Cosmetic Products
Amino acids · lotions · shampoo · vitamins · etc.
Single mechanical seal (ED)
Suction pressure: up to 15 bar (abs.) (215 psig)
Viscosity: 0.2 – 5000 mPas
Temerature: max. 300°C (580°F
Double mechanical seal with buffer fluid (DD)
Suction pressure: vacuum to max 15 bar (abs.) (215 psig)
Viscosity: 0.2 – 10000000 mPas (cP)
Temerature: max 300°C (580°F)