Dolphin Floating
Suction Strainers
 Megator Dolphin floating suction
strainers draw from just below the surface of water, below scum and debris
and above sand and muck. It screens out materials that damage and wear
out pump impellers, seals and bearings. A patented construction with a
freely turning tube eliminates the common twisting effect of the hose
and ensures correct attitude of the strainer at all times. The float
chamber contains a moulding of polyurethane foam, providing millions of
separate air cells, so there is no loss of buoyancy if damaged.
For dewatering mines, quarries, excavations, sumps. For water
supplies from rivers, lakes and ponds. Supplying water to fire
appliances. For oil storage and other installations required to
draw from just under the surface.
| Model |
Hose Size |
Diameter |
Height |
Max. Capacity |
| 11/2" |
11/2" |
53/4" |
63/8" |
37 US gpm |
| 38 mm |
146 mm |
162 mm |
140 lt/min |
| 2" |
2" |
73/16" |
67/8" |
74 US gpm |
| 51 mm |
183 mm |
175 mm |
280 lt/min |
| 3" |
3" |
10" |
81/2" |
148 US gpm |
| 76 mm |
254 mm |
216 mm |
560 lt/min |
| 4" |
4" |
12" |
101/2" |
304 US gpm |
| 102 mm |
305 mm |
267 mm |
1150 lt/min |
| 6" |
6" |
153/4" |
19" |
792 US gpm |
| 152 mm |
400 mm |
482 mm |
3000 lt/min |
Suction Hose
A suction hose of 10 ft (3 m) long is
recommended. The floating strainer will support this length of
hose in the water, the other end resting on the ground or attached to a
fixed pipe. The floating strainer normally floats with
the hose hanging in a loop. part of the strainer may be above the
water surface, but air will not be drawn in, as the entry tube is well
submerged. In shallow water a longer hose is practicable as it
rests partly the bottom.
Large rise and fall
If there is a large rise and fall of the water level,
and particularly if the length of hose is restricted, the fixed end of
the hose should be only a little above the low water level. It
does not generally matter if the strainer is completely submerged at
high level. Foot valve
If a foot valve is required, due to the use of a
non-self priming pump, it should be fitted at the lowest point of the
suction piping. It is not advisable to fit a foot valve in or
adjoining the strainer, as this could form an air lock in the hose.
Dolphin strainer Adobe Acrobat
PDF format (127 KB)
Dolphin strainer movie (1.1 mb)
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Reduce wear of pumps.
