The reliable timing gear of the Börger Rotary Lobe Pump is separated from the wetted
pump parts by a fluid filled intermediate chamber that also quenches the mechanical seal.

The Börger Pumps are equipped with solid, non-product wetted shafts.

The variety of available materials allows customizing to individual applications.

Pump casing:	- Cast iron, wear and corrosion resistant
	- Special hardened ductile cast iron
	- Stainless steel with high corrosion resistance
Protective casing liners:	- Solid carbon steel, wear resistant
	- Corrosion resistant stainless steel
Rotors/Rotary Lobes:	- Entirely rubber coated rotors or pushed-on rotor tips from:
	SBR (Buna), wear and age resistant NBR (Buna-N), for multiple fluids, oil resistant EPDM, multiple uses for chemicals FPM, very good oil and chemical characteristics CSM, good chemicals and ozone resistance Non-standard materials for special applications
	- Rotors from PTFE, for extreme chemical and temperature loads
	- Rotors from solid stainless steel for pumping clean, aggressive fluids
Shaft sealing:	- Mechanical seals, for abrasive and corrosive loads, from:
	Duronite SI/SIC (silicon carbide reaction bonded) SSIC (silicon carbide sintered pressureless) with secondary seals from available customary elastomers
	- Special shaft sealings for customized solutions,
	Examples: Glandpackings, with or without seal chamber ring Multi-ring-seals, elastomer or synthetics based