A paint and varnish manufacturer uses a Boerger Rotary Lobe Pump with packing mechanical seals in a paint mixing plant for pumping paint containing solvent.
The pump is installed with a mixer in a small room. The Börger Rotary Lobe Pump complies with ATEX standarts due to the explosive protection zone in the room. To protect the packing seals from critical temperatures, both packing seals are monitored thermally by ATEX compatible temperature gages. If a critical temperature is reached, the pump is shut down via the control unit.
The various ingredients of the paint are blended together in a tank outside the EX room. The ingredients are transferred to a mixer by the Börger pump. After the mixer, the Börger Rotary Lobe Pump transfers the medium back to the tank. The Boerger pump keeps the medium circulating until it has become a homogeneous mixture. A number of different paints and varnishes are blended in this plant. The speed of the pump can be adapted to the different viscosity of the pumped medium.
|Börger||Rotary Lobe Pump|
|Medium||Paint with solvent content|
|Viscosity||1,000 - 10,000 mPas|
|Rated capacity||1 - 3 m³/h (4,4 - 13,2 usgpm/h)|
|Speed||220 - 320 rpm|