Impeller pump Sub TWI 6 series

for fresh waterfor potable waterelectric

Product

• Submersible pump

Key features

• Long service life thanks to corrosion-resistant stainless steel, optionally in V4A quality
• ACS certified for domestic hot water applications
• A high degree of flexibility thanks to versions in the 4, 6, 8 and 10-inch area
• High range of performance from 1 to 250 m³/h

Design
Multistage 6" submersible pump in tie strap version for vertical or horizontal installation.

Application

• Designed for pumping drinking water (in accordance with ACS and RI.SE), rainwater and process water with up to 50 g/m³ sand content from wells and rainwater storage tanks
• Irrigation
• Sprinkling
• Water supply
• Pressure boosting
• Ground water drainage and lowering

Equipment / Function

• Integrated non-return valve
• Discharge port according to NEMA

Type key
Example: Wilo-Sub TWI 6.18-04-C-SD
Wording explanation:
TWI = Series
6 = Diameter of the hydraulic unit in inches ["]
18 = Rated volume flow [m³/h]
04 = Number of hydraulic stages
C = Series generation
SD = Starting mode (SD = Star-delta starting; without = Direct starting)

Technical data

• Mains connection: 3~400 V, 50 Hz
• Submerged operating mode: S1
• Fluid temperature: 3 – 30 °C
• Minimum flow rate at motor: 0.08 – 0.5 m/s (depending on motor)
• Max. sand content: 50 g/m³
• Max. number of starts: 20/h
• Max. immersion depth: 100 m or 350 m (depending on motor)
• IP rating: IP68
• Discharge port: Rp 2½ - Rp 3

Materials

• Hydraulics housing: 1.4301 (AISI 304)
• Impellers: 1.4301 (AISI 304)
• Hydraulic shaft: 1.4057 (AISI 431)
• Motor housing: 1.4301 (AISI 304)
• Motor shaft: 1.4301 (AISI 304) or 1.4305 (AISI 303)

Construction - Hydraulics
Tie strap version of multistage submersible pump with radial or semi-axial impellers, integrated non-return valve and a standardised connection. 4" and 6" connections: NEMA standard. Discharge port with threaded flange and female thread. All parts that come in contact with the fluid are made of corrosion-free materials.

Motor

• Three-phase current motor for direct or star-delta start
• Sealed motor with lacquer-insulated, resin-covered winding and water-glycol filling
• Rewindable motor with PVC-insulated winding and water-glycol filling
• Motor bearings are self-lubricating

Cooling

• The motor is cooled by the pumped fluid. Always operate the pump in a submerged state
• Vertical installation is possible with or without cooling jacket
• Horizontal installation must be performed in conjunction with a cooling jacket

Scope of delivery

• Hydraulics + motor completely assembled
• 4 m, 5 m or 10 m connection cable approved for drinking water
• Installation and operating instructions

Options

• Hydraulics in 1.4401 (AISI 316)
• Motor in 1.4401 (AISI 316), 1.4408 (ASTM A 351) or 1.4571 (AISI 316TI)
• Rewindable motor
• Motor with drinking water filling
• Pressure shroud version for direct installation of the pump in the pipe system (max. inlet pressure: 10 bar)
• Custom-made variants

Accessories

• Cooling shroud
• Pressure shroud
• Diaphragm expansion tank
• Gate valve
• Float switch
• Pressure switch
• Electrode
• Switchgear
• Alarm switchgear
• Casting resin kit
• Connection cable

Caractéristiques / spécifications techniques

• Mains connection: 3~400 V, 50 Hz
• Submerged operating mode: S1
• Fluid temperature range: 3 – 30 °C
• Minimum flow rate at motor: 0.08 – 0.5 m/s (depending on motor)
• Maximum sand content tolerated: 50 g/m³
• Maximum number of starts: 20 per hour
• Maximum immersion depth: 100 m or 350 m (depending on motor)
• Ingress protection: IP68
• Discharge port sizes: Rp 2½ to Rp 3