DEWATERING PUMP DW
Fluid DW - Submersible Pump Closed Impeller
Differences to other Pumps
The Fluid DW (Dewatering) range has a totally steel wet end, where some manufacturers utilize rubber lined components.
A comprehensive cooling jacket protects the DW pump in full from over heating; and a large integrated carry handle makes moving the pump effortlessly.
In some other (dewatering) pump brands, the mechanical shaft seal is situated just behind the impeller.
Pumps that do have their mechanical shaft seal running in oil, lacks effecting cooling of the motor winding, as water is only channelled a quarter way up, next to the stator housing.
This lack of cooling creates a problem, if low flow passes through the discharge channel, as it will result in over heating of the stator and rotor shaft, which in turn damages the rubber bellow on the mechanical seal, causing a possible burn-out/failure.
The FP dewatering pump, transfers water through the impeller, which is dispersed by the diffuser upwards in to the cooling jacket, that fully surrounds the motor stator housing, ensuring maximum cooling.
Spigots in H7 Tolerance allows for Ex Approval.
Mechanical Shaft Seal
The Fluid Pumps mechanical seal is back-to-back, in an oil housing, out of range of the transferred product.
Fully submerged in oil, allowing for maximum lubrication, as well as proper cooling for a limited dry-run, without damaging the mechanical seal.
The FP mechanical seal is pre-screened with an oil seal, sealing effectively around the impeller neck.
Impeller
On larger models, the impeller design is an enclosed vane centrifugal type, not open / suction liner type.
Higher efficiency is achieved by using a enclosed impeller, compared to open / suction liner type.
Moveability
The Fluid DW pump is equipped with a large heavy duty carry / transport handle, wider than the outer diameter of the dewatering pump, for easy and safe handling.
With the reduced pump weight, it is possible (and within limits) for two people to move the dewatering pump effortlessly.
Technical (Motor)
— Voltages: 380/415, 50Hz; 525/550, 50Hz; 1000/1100, 50Hz.
— Motorpoles: 2 & 4.
— Protection: IP68 @ 20m.
— Rotor/Shaft Balanced to ISO 1940-1 G2.5.
— Quality Stator Core with laminations wound in Class H-180°C, B Temperature Rise Specification.
Materials/Composition
— Cable: HO7-TR Non-Flameproof. Twenty meter standard length or to customer's requirements.
— Pilot Circuit: Ex Flameproof special cable.
— Cable Entry: SG40 Cast Iron.
— O-Rings & Oil Seals: Nitrile.
— Mechanical Shaft Seal: Silicon Carbide/Silicone Carbide; Tungsten Carbide/Tungsten Carbide.
— Top Cover/Motor Casing: SG40 Cast Iron.
— Bearing Housing: SG40 Cast Iron.
— Diffuser/Suction Liner: SG60; CrM0102.
— Volute: SG40 Cast Iron.
— Shaft: 431-T Stainless Steel.
— Strainer: High Carbon Steel; SG40 Cast Iron.
— Cooling Jacket: High Carbon Steel.
— Carry Handle: Mild Steel.
— Bearings: D.E. Large Double Angular Contact Bearing; N.D.E Deep Groove Ball Bearing.
— Rotating Assembly Balanced to ISO 1940-1, G2.5 Specification.
— Paint Protection: Dual Pack – System B Specification.
The Fluid DW submersible is available in a Non-Flameproof pump for surface conditions, as well as an Explosion Proof pump for underground conditions.
SABS Approved. Classification: Ex dl/IIB T4 Mb.
Downloads
— PDF catalogues / drawings — click here
Dewatering Pump: The Fluid DW submersible is available in a Non-Flameproof pump for surface conditions, as well as an Explosion Proof pump for underground conditions.
Dewatering Pump: Equipped with a large heavy duty carry / transport handle, for easy and safe handling.
Dewatering Pump: Big wheels for improved mobility.
Dewatering Pump: Available in Multi Impeller and Material options to meet duty demand.
Dewatering Pump: Transfers water through the impeller, which is dispersed by the diffuser upwards in to the cooling jacket, that fully surrounds the motor stator housing, ensuring maximum cooling.
Applications: Raw water transfer dewatering, shaft sinking, open pits, haulages, and travel ways.