KRACHT - Model KF 4/125...KF 6/730 -Transfer Gear Pumps with Magnetic Coupling

The magnetic coupling serves as a shaft seal and for the transmission of the torque. The outer rotor of the magnetic coupling is assembled on the engine shaft and the inner rotor is assembled directly on the pumping shaft. The torque is transmitted through the magnetic forces between the outer and inner rotor. Between the two rotors, you have the split case which hermetically seals the pump.

The magnetic coupling is used when an absolute sealing is required between the pumping room and the atmosphere, for example, in the case of a dosage of isocyanate, where the contact with air would lead to an unwanted cure of the medium. It can be used in vacuum operation for example, filling brake fluid in which an intrusion of air into the system is steadily prevented.

Also, a leak-free operation is ensured when working in closed systems with high pressure on the pump inlet side. The magnetic coupling is predestined for dispensing dangerous and health hazardous mediums.

• Pump
• Housing and cover : EN-GJL-250 (GG 25) EN-GJS-400-15 (GGG 40) on request
• Gearing : 16MnCr5
• Bearing bushes : DU (multi-compound plain bearings P10, DP4) optional Iglidur X
• Seals : EPDM, CR, HNBR, FKM, FEP
• Magnetic coupling
• Inner rotor :
• Hub made of stainless steel 1.4571
• Magnets made of Sm2Co17
• Magnet covering made of stainless steel 1.4571
• Split case :
• Flange made of stainless steel 1.4571
• Pod made of stainless steel 1.4571 (From construction size 75; alternatively of Hastelloy In ceramics (Zr02MgO) on request)
• Outer rotor :
• Hub made of 355J2G3 (St 52)
• Magnet made of Sm2Co17 or NdFeB

• Fixing type : flange
• Connection type : flanged connection, welding connection, threaded connection
• Direction of rotation : clockwise or anticlockwise
• Mounting position : optional