A-A-59000A
3.
SALIENT CHARACTERISTICS
Strainer shall comply with the applicable
3.1 Codes and standards.
requirements of table I.
TABLE I.
Reference data.
Equipment/Characteristic
Description
Fluid type
Sea water
Operation pressure
150 or 250 psi
70 to 120oF
Temperature range
Piping connections
Inlet, outlet, and sump port
150 and 250 rating MIL-F-20042
full face flanges
Pressure resistance
FCI 78-1
Flow capacity
Table III per ISA-S75.02
Shock resistance
MIL-S-901 grade A
Type II strainer only
Motor
MIL-M-17059
Control Panel
MIL-M-38510 and MIL-STD-1686
3.2 Design and construction. Each strainer shall be of the type, class,
style, and size as specified (see 2.1). Each strainer shall contain one or
more rotatable screens and fixed scraper bars for the purpose of cleaning the
screen without shutting down operation of the system. Compartment covers
shall be flanged and attached to the body by bolts. Each cover shall effect a
positive seal on an O-ring recessed in the cover plate. Blade inspection/
adjustment covers on strainer sizes 4 inches and above shall be bolted to
flanges on the strainer body. An O-ring recessed in the cover shall be
provided to form a watertight seal. The sump below the screen(s) shall be
fitted with a drain outlet.
3.3 Material. The material requirements for all strainer components shall be
in accordance with table II.
3.4 Screen. The screen shall be made of one unit. Screen shall be of the
perforated plate construction. All seam welds shall be continuous. The total
clear/open area of the perforations shall be sufficient to allow a maximum
clean pressure drop of 6 psi at the design flow rates as shown in table III.
Unless otherwise specified (see 7.1), perforated holes are sized as specified
by 7.6.3).
2
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