The NW521 is an extremely lightweight pump: 29.5 lbs. (excl. cable) with a capacity as high as pumps that normally weigh between 40 and 73 lbs. in our competitor’ range! Trouble-free operation with service intervals every 6 months (service performed in a few minutes only) makes the NW521 an ideal pump for Steam Manholes.

FEATURES: The shaft seals are grease lubricated. The pump seal consists of one radial lip seal (Simmer rings). The motor seal consists of one radial lip seal (Simmer ring). Both the pump seal and the motor seal are built in one complete unit of aluminum filled with grease. The rotor shaft has a tungsten carbide wear sleeve rotating against the lip seals.