Sealless Centrifugal Pumps
The sealless centrifugal pump is used when there is a need to contain toxic, dangerous and/or valuable fluids. Application may be dictated by space, noise, environment, or safety regulations. This section outlines components of sealless centrifugal type pumps.
The driven shaft is completely contained in a pressurized vessel containing the pumped fluid. The pressurized vessel or primary containment device (chamber) is sealed by static seals such as gaskets or O-rings.
The power required by the driven shaft is transmitted through a containment barrier. Methods include (1) the "canned motor pump" with a liner (can) placed between an induction motor's armature and stator; (2) the "magnetic drive pump" with a shell(s) located between an outer rotating element with permanent magnet's and a mating inner ring which follows the driving magnets. The inner rotor may have permanent magnets or it may be an induction device.
Canned Motor Pumps
These compact, self contained, leak-free, sealless centrifugal pumps are ideal for handling corrosive, aggressive or expensive liquids which must not come into contact with the atmosphere. Canned motor pumps require no on-site alignment and offer primary and secondary fluid containment as standard making them the ideal choice for the toughest applications.
View our range of Canned Motor pumps
Magnetically Coupled Pumps
Magnetically coupled centrifugal pumps which are leak-free by design, so particularly suited to handling toxic, flammable or other dangerous liquids. Generous internal clearances and Silicone Carbide bearings maximise pump life and increase maintenance intervals.
- Close-coupled or frame mounted configurations available
- 26 sizes covering capacities to 300m3/hr and differential heads up to 145 metres
- High temperature design available for pumping fluids up to 400°C without cooling