Wellman
Mandals Wellman is made from extruded thermoplastic polyether based polyurethane (TPU) with excellent wear & tear properties. The reinforcement is made from circular woven filament polyester yarn. The “extrusion through the weave” production method gives a very strong bonding between cover and lining as well as firmly encapsulating the woven polyester.
The hose has the following potable water certifications:
- WRAS approved to BS 6920UK
- KTW-DVGW approval, Germany
- W270 approval, Germany
- NSF 61 listing, USA
Mandals Wellman is an important part of a system where also the coupling is central, and can be supplied by Mandals. The hose is meant for use in a borehole with a submersible pump mounted at the end of the hose (we can direct you to pump suppliers if needed). The very high tensile strength of the hose makes this possible. Also, the incorporated strap with loops at the outside of the hose facilitates the strapping of the electrical cables for the pump to the hose.
The main advantages of the Wellman system is:
- Easier to handle than pipes of steel, fibreglass or similar
- Simple installation and retrieval
- Very good hydraulic characteristics – less friction and more flow
- Low risk of damage to cables and pump
- No corrosion
- Simple maintenance
Mandals Wellman can operate in a temperature range from -50°C to +75°C and can withstand intermittent use up to + 80°C. Maximum length extension under recommended operation is 2 % and maximum diameter swell under recommended operation is 15 %.
Standard lengths up to 200 meters, and longer lengths can be made on request.
Technical Data
| Inner Diameter | Wall Thickness | Weight * | Burst Pressure | Max. Well Depth | Max. Continuous End Load ** | ||||||
| inch | mm | inch | mm | lbs/ft | kg/m | psi | bar | ft | m | lbs | kg |
| 2 | 51,0 +2,0 | 0,11 | 2,8 | 1,23 | 0,58 | 870 | 60 | 820 | 250 | 3 750 | 1 700 |
| 3 | 76,0 +2,0 | 0,13 | 3,2 | 2,01 | 0,91 | 870 | 60 | 820 | 250 | 6 600 | 3 000 |
| 4 | 102,0 +2,5 | 0,14 | 3,6 | 3,00 | 1,86 | 870 | 60 | 820 | 250 | 12 100 | 5 500 |
| 5 | 127,0 +2,5 | 0,16 | 4,0 | 4,23 | 1,95 | 870 | 60 | 820 | 250 | 15 900 | 7 200 |
| 6 | 152,0 +3,0 | 0,16 | 4,0 | 5,07 | 2,30 | 870 | 60 | 820 | 250 | 19 850 | 9 000 |