Wilo-Sub TWI 8
Multistage 8″ submersible pump in tie strap version for vertical or horizontal installation.
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Description
Multistage 8″ submersible pump in tie strap version for vertical or horizontal installation.
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Advantages
- 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
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Technical Features
Design
Multistage 8″ submersible pump in tie strap version for vertical or horizontal installation
Application
Designed for pumping drinking water (in accordance with ACS and RI.SE) and process water with up to 50 g/m³ sand content from wells and rainwater storage tanks for the following applications:
- Water supply
- Pressure boosting
- Ground water drainage and lowering
Typekey
Example: Wilo-Sub TWI 8.80-02-C-SD TWI Series 8 Diameter of the hydraulic unit in inches [“] 80 Rated volume flow [m3/h] 02 Number of hydraulic stages C Series generation SD Starting mode - Without = Direct starting
- SD = Star-delta starting
Technical Data
- Mains connection: 3~400 V, 50 Hz
- Submerged operating mode: S1
- Fluid temperature: 3 – 20 °C or 3 – 30 °C (depending on motor)
- Minimum flow rate at motor: 0.1 – 0.5 m/s (depending on motor)
- Max. sand content: 50 g/m3
- Max. number of starts: 10/h or 20/h (depending on motor)
- Max. immersion depth: 100 m or 350 m (depending on motor)
- Protection class: IP68
- Discharge port: Rp 5
Materials
- Hydraulics housing: 1.4301 (AISI 304)
- Impellers: 1.4301 (AISI 304)
- Hydraulic shaft: 1.4057 (AISI 431)
- Motor housing: EN-GJL-250 (ASTM A48 Class 35/40B) and 1.4301 (AISI 304)
- Motor shaft: 1.4021 (AISI 420) or 1.4301 (AISI 304) or 1.4305 (AISI 303)
Construction
Submersible pump for vertical or horizontal installation.
Hydraulics
Tie strap version of multistage submersible pump with semi-axial impellers, integrated non-return valve and a standardised connection:
- 6″ connection: NEMA standard
- 8″ connection: NEMA connection
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.
The 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.
Options
- Hydraulics in 1.4401 (AISI 316)
- Motor in 1.4401 (AISI 316) or 1.4571 (AISI 316TI)
- Motor with drinking water filling
- Pressure shroud version for the direct installation of the pump in the pipe system (max. inlet pressure: 10 bar)
- Custom-made
Accessories
- Cooling shroud
- Pressure shroud
- Diaphragm expansion tank
- Gate valve
- Float switch
- Pressure switch
- Electrode
- Switchgear
- Alarm switchgear
- Casting resin kit
- Connection cable
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Downloads
Click Below to Download:
Submersible motor pump – motor pre-filled
Submersible motor pump – motor non-filled
Submersible motor pump in booster shroud – motor pre-filled
Submersible motor pump in booster shroud – motor non-filled
Wilo-Sub TWI 4, Wilo-Sub TWI 6/TWI 06, Wilo-Sub TWI 8/TWI 08, Wilo-Sub TWI 010 – Certification Booklet
Wilo-Sub TWI – Certification Booklet
Group Statement REACH
UKCA 2223458
UKCA 2223722
Why Wilo Pumps…
Self-Priming
Convenient
Highly-Efficient
Noise-Free
Diversity
Optimised Design
What Trebles Customers Think
Job delivered and commissioned at the height of the pandemic with no changes to the excellent service we always receive.
Carl Berridge – MD, Powergas
The team at Trebles were great. I really can’t praise them enough.
Richard Beard – Club Secretary, Belvedere Park FC
Not many providers would be able to fully breakdown & rebuild a booster on site
Clive Bradley – Senior Contracts Engineer, JS Wright
We relied on Trebles expertise to ensure the right products were sourced for our project.
Matthew Gidley – Senior Contracts Engineer, JS Wright
Top workmanship and a professional attitude from a supportive team
Richard Leek – Project Manager, Marshdale
Excellent customer service again! You genuinely make my life so much easier
Anthony Gooding – Director, HSP
Excellent service and a company I would recommend to anyone in future
Jason Goldsmith – Supervisor, Interserve
Engineers were very professional with an excellent knowledge of their trade
Martin Deakin – Gas Surveyor, Bromford
We’re writing to express our sincere thanks to all who help ensure our hospitals are able to run smoothly
Richard Hill – Estates Manager, London Road Community Hospital
Job delivered and commissioned at the height of the pandemic with no changes to the excellent service we always receive.
Carl Berridge – MD, Powergas
The team at Trebles were great. I really can’t praise them enough.
Richard Beard – Club Secretary, Belvedere Park FC
Not many providers would be able to fully breakdown & rebuild a booster on site
Clive Bradley – Senior Contracts Engineer, JS Wright
We relied on Trebles expertise to ensure the right products were sourced for our project.
Matthew Gidley – Senior Contracts Engineer, JS Wright
Top workmanship and a professional attitude from a supportive team
Richard Leek – Project Manager, Marshdale
Excellent customer service again! You genuinely make my life so much easier
Anthony Gooding – Director, HSP
Excellent service and a company I would recommend to anyone in future
Jason Goldsmith – Supervisor, Interserve
Engineers were very professional with an excellent knowledge of their trade
Martin Deakin – Gas Surveyor, Bromford
We’re writing to express our sincere thanks to all who help ensure our hospitals are able to run smoothly
Richard Hill – Estates Manager, London Road Community Hospital
Job delivered and commissioned at the height of the pandemic with no changes to the excellent service we always receive.
Carl Berridge – MD, Powergas
The team at Trebles were great. I really can’t praise them enough.
Richard Beard – Club Secretary, Belvedere Park FC
Not many providers would be able to fully breakdown & rebuild a booster on site
Clive Bradley – Senior Contracts Engineer, JS Wright
