for horizontal end suction and vertical type pumps.
Careful consideration will be given to the type of
pump selected. The Pump Column paragraph applies
only to vertical type pumps and should be deleted if
horizontal type pumps are selected. Delete design
conditions if pump schedule is shown on drawings.
**************************************************************************
Condensate pumps shall be [_____] identical [_____] liter per hour gpm,
[horizontal end suction ANSI size A70 type pumps][vertical type pumps with
suction barrels] type. Nomenclature used in this specification pertaining
to pumps and hydraulic conditions is that used by the Hydraulic Institute
Standards for Centrifugal, Rotary and Reciprocating Pumps.
2.8.2.1
Design Conditions
Number of pumps
[_____]
Rated capacity of each pump, L/hr
[_____]
Total dynamic head at rated capacity m
[_____]
Net positive suction head (NPSH) available m
[_____]
Maximum allowable shut-off head, m
[_____]
Type of fluid pumped
Condensate
Maximum expected temperature of fluid, degrees C
[_____]
Maximum speed of pump, rpm
1800
2.8.2.2
Construction and Materials
Pump shall be [centrifugal, horizontal end suction, top discharge type]
[vertical, multistage, self contained type with suction barrel]. The pumps
shall include [_____] Class [_____] suction flange and [_____] Class
[_____] discharge.
2.8.2.3
Casing and Casing Bowls
Pump [casing] [casing bowls] shall be flanged and bolted with jacketing top
bolt. [Casing shall be constructed of ductile iron ASTM A 395/A 395M,
Grade 60-40-18.] Casing bowls shall be flanged, constructed of ASTM A 48/A
48M Class 30 cast iron equipped with pinned, replaceable wearing rings
constructed of ASTM A 276 Type 316 stainless steel with 11 to 13 percent
chrome hardened to 450 BHN. Bowls shall be unlined. Bowl assemblies shall
be designed to withstand an operating pressure of 4.3 MPa 630 psi.
[Minimum casing thickness for horizontal pumps shall be 12.7 mm 1/2 inch
thickness with an additional 3.2 mm 1/8 inch corrosion allowance.]
2.8.2.4
Impeller
[Impeller for horizontal type pump shall be totally open type, screw
mounted directly to shaft with an 0-ring seal and constructed of ductile
iron ASTM A 536, Grade 60-40-18. Impeller shall be dynamically balanced to
the maximum rated speed.] [Impeller for vertical can type pumps shall be
enclosed, split ring, key mounted type and shall be constructed of 11 to 13
percent chrome steel in accordance with ASTM A 743/A 743M or 316 SS ASTM A
SECTION 15561A
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