DNB

Application

The DNB series is used for pumping and draining clear liquid and sewage. The special S-Flow channels impeller permits the passage of short solid fibrous and is particulary suitable for wastewater and sewage treatment plants. The 4 poles versions can be used in application where continue S1 service is needed and are characterized by their quiet operation.

Characteristic

The main components are realised in cast iron GG20. The Double mechanical seals in a back to back configuration located in the oil chamber guarantee long durability to the product.

Motor range

• Squirrel cage motor in 2 and 4 pole version
• Thermal protection embedded in the winding (In the DNB …-2/220 and DNB 4 poles model the thermal protection T1 and T2 conductor to be wired to the control panel)
• Insulation class F 155°C
• Motor protection IP 68

Motor cooling

The cooling of the motor is ensured by the liquid where the pump is submerged.

Limits of use

• Max. permissible liquid temperature: 40°C with pump fully submerged
• Maximum depth of immersion: 20 mt.
• Permissible pH value: 6-10
• Hydraulic features suitable for liquids with density <1,1 kg/dm3
• Allowed voltage: 230V-400V ±5%
• Allowed frequency: 50Hz ±2%

S-Flow impellers
The Superior efficiency of the S-Flow Impeller guarantees excellent performances, with wide solid bodies passage and with low power pumps.

Explosion proof pumps
Pumps with explosion proof available on request.

Relay
For the correct operating of the float switch on the three-phase version, up to 1,5 kW 2 poles. ATEX excluded

Inspectional Oil Chamber
Excellent lubrication of the mechanical seals even in the harshest pumping conditions. The presence of a lip seal ensure the maximum seal in case of oil leakage..

For single phase pumps:
Control-box with external main capacitor on request

Automatic coupling foot
Type: DUTY 50 – DUTY 65 -B4 (PN10)

Explosion proof control box available
on request

Flanged hose connection N5
Thread G2” hose connection
up to 1,1 kW

Automatic coupling foot
Type: DUTY 65 -B4/PN10

Flanged hose connection N5

Explosion proof control box available on request

For single phase pumps:
Control-box with external main capacitor

Explosion proof control box available
on request

Automatic coupling foot
Type: DUTY 80 and B5

Flanged hose connection N2

For single phase pumps:
Control-box with external main capacitor

Automatic coupling foot
Type: DUTY 80 and B5

Flanged hose connection N2

Explosion proof control box available
on request