In the standard versions, grey cast iron is used for the construction of the pump housing. Other housings in welded steel are possible. The rotors are always made from carbon alloy steel and depending on the models and sizes may be nitrided steel.

They should not include any products thats lack viscosity and lubricant power -water, petrol, benzyl, etc. -however, they have been used successfully in the transport of certain materials which, due to their chemical composition do not require pumps made from stainless steel, in general, all products that are compatible with the construction material that have a minimum viscosity (30 cSt) and are not abrasive or contain solids in suspension.