Dayliff DS 77 submersible pumps are designed specifically for borehole water supply applications.
Dayliff DS 77 Pump Construction
These pumps are made from stainless steel with water-lubricated rubber bearings. A submersible motor is fitted beneath the pump, and suction done through a strainer between the pump and motor.
Motor
The pump is connected to a sealed, liquid-cooled, 2-pole asynchronous squirrel cage motor made of stainless steel. This motor requires a remote starter, and in cases where unstable supply voltage may occur, it is advisable to include an additional quick-tripping control relay. It is important to note that due to the low starting torques associated with submersible motors, the use of Direct-On-Line (DOL) starters is recommended. For thorough pump control, including protection against low-level motor overload and irregular power supply, a DAYLIFF SCT electronic pump controller is suggested.
Enclosure Class: IP68
Insulation Class: F
Voltage: 3x415V
Speed: 2900 rpm
Operating Conditions
Pumped Liquid: Thin, clean, chemically non-aggressive liquids without solid particles or fibres.
Max. Liquid Temperature: DS wet end—50°C
Max. Water Depth: 300m
Min. Borehole Diameter: 200mm – 6″, 254mm – 8″
| Models | Motor Size ('') | Motor | Full Load Current (A) | Istart/I | Dimensions (mm) | Weight (kg) | ||||
| kW | HP | A | B | C | E* | |||||
| DS 77-3 | 6 | 11 | 15 | 24.2 | 4.8 | 1604 | 730 | 874 | 178 | 92 |
| DS 77-4 | 15 | 20 | 32 | 5 | 1788 | 785 | 1003 | 113 | ||
| DS 77-5 | 18.5 | 25 | 40 | 5.5 | 1991 | 860 | 1131 | 119 | ||
| DS 77-6 | 22 | 30 | 47 | 5.1 | 2179 | 920 | 1259 | 138 | ||
| DS 77-7 | 26 | 35 | 56.5 | 5.1 | 2500 | 1157 | 1387 | 181 | ||
| DS 77-9 | 30 | 40 | 64 | 5.7 | 2694 | 1050 | 1644 | 200 | ||
| DS 77-11 | 37 | 50 | 78.5 | 3.7 | 3080 | 1180 | 1900 | 217 | ||
| DS 77-15 | 8 | 55 | 75 | 114 | 5.9 | 3400 | 1350 | 2424 | 200 | 269 |
