TM 10-4610-229-10
1-7.
EQUIPMENT DATA (CONT)
High Pressure Pump Diesel Engine
Part Number:
2914356-1
Type:
4-stroke, 6-cylinder diesel
Bore:
5.4 in. (11.9 cm)
Stroke:
6.5 in. (14.3 cm)
Displacement:
893 cu in. (14,634 cc)
Power Rating:
325 hp/2100 rpm (intermittent)
250 hp/1800 rpm (continuous)
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-8. GENERAL. The ROWPU consists of a series of diesel-engine-driven pumps, filters, and a reverse osmosis block
assembly capable of converting 150,000 gpd of brackish or sea water to drinking water. The following paragraphs
describe the operation of the individual functional groups which comprise the ROWPU and their relation to the overall
system.
1-9. FUNCTIONAL GROUPS
a.
Raw Water Pump Assembly
Consists of a skid-mounted diesel engine/ centrifugal pump combination. The
engine may be started by a hand-crank or with an electric starter. The pump takes water from a remote location up to 95
ft away and pumps it to the boost pump assembly up to 500 ft away.
b.
Boost Pump Assembly.
Consists of a skid-mounted diesel engine/ centrifugal pump combination. The
engine is started with an electric starter and drives the pump through a belt. This pump provides the pressure to
maintain feedwater flow to the pretreatment assembly, through the multimedia filters, back through the pretreatment
assembly, and to the high pressure pump assembly.
c.
Pretreatment Assembly.
Consists of skid-mounted gage panel, two chemical metering pumps,
interconnecting piping, valves, and cartridge filter. A manually adjustable chemical metering pump doses the feedwater
with a coagulant aid as it enters the pretreatment assembly. This coagulant aid helps the multimedia filters to remove
fine particles. The feedwater then goes to the multimedia filters where particles are removed. It returns to the
pretreatment assembly where it is dosed with a scale inhibitor by a second manually adjustable chemical metering pump.
The scale inhibitor prevents the formation of scales on the reverse osmosis membranes. The feedwater continues to the
cartridge filter where any remaining fine particles are removed.
1-11
