2.
Use suction pipe one or two sizes larger than the pump
suction, with a reducer at the suction flange.
Suction
piping should never be of smaller diameter than the
pump suction.
3.
Reducers should be eccentric at the pump suction
flange with sloping side down and horizontal side at
the top (Figs. 26, 27, 28).
$
CAUTION
Pump must never be throttled on suction side.
4.
Suction strainers, when used, must have a net “free
area” of at least three times the suction pipe area.
5.
Separate suction lines are recommended when more
than one pump is operating from the same source of
supply.
Suction Lift Conditions
1.
Suction pipe must be free from air pockets
2.
Suction piping must slope upwards to pump.
3.
All joints must be air tight.
4.
A means of priming the pump must be provided, such
as a foot valve, except for the self priming pump.
Suction Head/Flooded Suction Conditions
1.
An isolation valve should be installed in the suction
line at least two pipe diameters from the suction to
permit closing of the line for pump inspection and
maintenance.
2.
Keep suction pipe free from air pockets.
3.
Piping should be level or slope gradually downward
from the source of supply
4.
No portion of the piping should extend below pump
suction flnge.
5.
The size of entrance from supply should be one or two
sizes larger than the suction pipe.
6.
The suction pipe must be adequately submerged below
the liquid surface to prevent vortices and air
entrainment at the supply.
24
3298 Family Rev. 4/07
CORRECT PIPING
Fig. 27
CORRECT
Fig. 26
Fig. 28
Summary of Contents for Goulds Pumps V 3298
Page 6: ...6 3298 Family Rev 4 07 ...
Page 26: ...26 3298 Family Rev 4 07 ...
Page 32: ...32 3298 Family Rev 4 07 ...
Page 38: ...38 3298 Family Rev 4 07 ...
Page 112: ...112 3298 Family Rev 4 07 ...
Page 115: ...3298 Family Rev 4 07 115 7 ...
Page 116: ...INTERCHANGEABILITY 3298 XS GROUP 116 3298 Family Rev 4 07 ...
Page 117: ...INTERCHANGEABILITY 3298 S GROUP 3298 Family Rev 4 07 117 7 ...
Page 119: ...INTERCHANGEABILITY 3298 L GROUP 3298 Family Rev 4 07 119 7 ...
Page 120: ...INTERCHANGEABILITY SP 3298 S GROUP 120 3298 Family Rev 4 07 ...
Page 121: ...INTERCHANGEABILITY V 3298 S GROUP 3298 Family Rev 4 07 121 7 ...
Page 122: ...INTERCHANGEABILITY V 3298 M GROUP 122 3298 Family Rev 4 07 ...
Page 124: ...124 3298 Family Rev 4 07 ...
Page 125: ...APPENDIX I 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 125 8 ...
Page 126: ...3298 HYDRAULIC COVERAGE CHARTS 126 3298 Family Rev 4 07 ...
Page 127: ...SP 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 127 8 ...
Page 128: ...SP 3298 HYDRAULIC COVERAGE CHARTS 128 3298 Family Rev 4 07 ...
Page 129: ...V 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 129 8 ...
Page 130: ...V 3298 HYDRAULIC COVERAGE CHARTS 130 3298 Family Rev 4 07 ...
Page 134: ...134 3298 Family Rev 4 07 ...
Page 136: ...IMPELLER TRIM PROCEDURE 136 3298 Family Rev 4 07 Fig III 2 Group S M Fig III 3 Group L ...
Page 142: ...142 3298 Family Rev 4 07 ...