suction bell to the discharge elbow outlet and shall not be less than
[_____] percent at the head-capacity condition(s) specified in paragraph
CAPACITIES.]
2.2.4
Suction Bell
**************************************************************************
NOTE: The recommended minimum thickness of steel
pipe to be specified is:
MINIMUM
DISCHARGE DIAMETER
THICKNESS
mm (in.)
mm (in.)
Up to and including 750 (30)
10 (3/8)
Above 750 (30) and up to and
13 (1/2)
including 1200 (48)
Above 1200 (48) and up to and
16 (5/8)
including 2100 (84)
If a formed suction inlet (FSI) is specified, this
paragraph should be deleted.
**************************************************************************
Make suction bell of [either cast iron, cast steel, or welded steel plate,]
[stainless steel plate]. Provide flanged connection for mating with
impeller bowl with a rabbet fit or four equally spaced dowels installed in
the vertical position for initial alignment purposes and to maintain
concentric alignment of pump. [Steel plate, if used,][Stainless steel
plate] shall have thickness of not less than [_____] mm inch. Suction bell
shall be [made in one piece][split vertically with bolted flanges joining
the two pieces together. Alignment shall be maintained by use of dowels].
Suction bell shall be supported entirely by pump casing. Supports from
sump floor will not be acceptable, [except those that are part of a formed
suction intake].[ Umbrellas, if used, should be supported by suction bowl.
Construct umbrella in two pieces if a single piece umbrella could not be
removed using pump opening in operating floor. Provide bolted flanges on
each half of umbrella and provide for easily removable bolted connection to
suction bowl. Provide sufficient lifting lugs on umbrella to aid in
handling.]
2.2.5
Impeller Bowl
**************************************************************************
NOTE: The recommended minimum thickness of steel
plate to be specified is:
MINIMUM
DISCHARGE DIAMETER
THICKNESS
mm (in.)
mm (in.)
Up to and including 750 (30)
13 (1/2)
Above 750 (30) and up to and
16 (5/8)
including 1200 (48)
Above 1200 (48) and up to and
19 (3/4)
including 2100 (84)
**************************************************************************
Make impeller bowl of [either cast iron, cast steel, welded steel plate or
SECTION 15131A
Page 23
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