GATHER - Magnetically Coupled Gear Pump

The GATHER gear pump was originally developed for degassing water in medical technology. This special type of pump has been further developed from a special laboratory pump to a high-precision pump for, amongst others, the chemical industry and water management, and enables pumping tasks involving a large volume flow range (20ml up to 4000l/h) with a differential pressure up to Δp_max = 20 bar.

The possibility of operating non-lubricating liquids within the viscosity range from 0.1 to 2000 mPa s (cP) is attained, amongst other things, by means of different and high-precision processed  materials. The pump housing and gear shafts are made of stainless steel, Hastelloy^® or Titan, the slide bearings of carbon or plastics such as PEEK or PTFE. The gear wheels are made of a nickel-based alloy, PEEK or PTFE (Teflon^®) and can be freely combined with each other. The materials used for gear wheel and slide bearings all have excellent tribological properties.

Internal rinsing channels and holes direct a small portion of the flow rate from the discharge side through the slide bearings back to the suction side. This results in the internal cooling of the magnet system and the slide bearings. Additionally, the necessary sliding film is produced on the slide bearings which ensures a durable function. 

If aqueous liquids are delivered, there will be no dead spaces in the pump. This effect can be exploited for cleaning in place (CIP) by means of a solvent or cleaning agent. This is also the basis for a SIP pump (SIP – sterilization in place) which can be sterilzed in the installed state and is mainly used in the pharmaceutical industry.

Since the gear pump has a speed-dependent flow rate characteristics,  delivery rates can be adjusted via the engine speed. The speed of the motors can be adjusted manually with a potentiometer or controlled externally via a control current or line voltage. Due to its delivery characteristics and in conjunction with a suitable drive, the GATHER gear pump can be easily integrated into a control loop (or PLC).  

With the right pump design, selection of materials and design of the drive unit we find the solution which enables our customers to work with process reliability. This also includes the design as a complete system with corresponding control circuit and accessories according to the customer’s specifications. Special solutions are our speciality. This also involves the use in potentially explosive atmospheres in compliance with the ATEX directives.