Wilo T 17 E3 Series - Page 12

en Product description
12 WILO SE 2019-01
T12 ... T 20 T 20.1 T 24 ... T42 T49, T56 T 50, T 50.1, T 57.1, T 63.1 T 63.2, T 72
Roller bearing: regular re-greasing
− − − − • •
• = standard-equipped , − = not available
* NOTICE!In the case of Ex-rated motors, the condensation water cannot be drained
off from all motors. Depending on the motor, the drainage screw would be placed in
a spark-proof area!
The connection cable is longitudinally watertight and has bare cable ends.
4.1.3 Seal
Different methods are used for the seal to the fluid and the motor compartment:
ƒ Version “H”: rotary shaft seal on the motor side, mechanical seal on the fluid side
ƒ Version “G”: two separate mechanical seals
ƒ Version “K”: two mechanical seals in a block seal cartridge made of stainless steel
Leakage from the seal is caught in the sealing chamber or leakage chamber:
ƒ The sealing chamber accommodates any possible leakage of the seal on the fluid
side.
ƒ The leakage chamber accommodates any possible leakage of the seal on the motor
side.
In the case of motors without an additional leakage chamber, the leakage from the
seal on the motor side is taken up in the motor.
Overview of gasket and leakage chamber
T12 ... T 20 T 20.1 T 24 ... T42 T49, T56 T 50, T 50.1, T 57.1, T 63.1 T 63.2, T 72
Sealing chamber
• • • • • •
Leakage chamber
− • − − • •
• = standard-equipped , − = not available
The sealing chamber between the mechanical seals is filled with medical white oil. The
leakage chamber is empty.
4.1.4 Material
The following materials are used in the standard version:
ƒ Pump housing: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Impeller: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Motor housing: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Seal on the motor side:
– “H” = NBR (nitrile)
– “G” = carbon/ceramic or SiC/SiC
– “K” = SiC/SiC
ƒ Seal on the fluid side: SiC/SiC
ƒ Seal, static: NBR (nitrile)
The precise details of the materials are shown in the respective configuration.