HH-225c Information
Fact Sheets
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Drawings
E-Electric; T-Trailer; S-Skid
HH-225c 12" x 8" High Head Centrifugal Pump
Description of Unit
The pump is an end suction centrifugal pump with a fully
automatic priming system built into the design. This enables
the pump to self-prime from completely dry conditions, even
with extended suction lines. Liquid is not required to prime
the pump, and therefore, in temporary dry trench conditions,
the pump will “snore” until such time as liquid is available.
The priming system utilizes a standard air compressor, which
feeds a pneumatic ejector mounted above the air/water separation
tank. With this device, suction lifts up to 28ft. (8.5m)
can be achieved. The pump can handle raw unscreened sewage, trade
effluents, thick slurries and solids up to a normal limitation
of 3.375” (85.7mm) diameter.
The impeller is of a semi-open design, of cast iron construction.
It is mounted on a LaSalle 1144 stress proof shaft with
AISI 416 stainless steel shaft sleeve fitted to a cast iron
bearing bracket; which also provides concentric location
for the pump volute.
The pump casing is fitted with replaceable wearing parts,
consisting of the impeller and wear rings, to simplify and
reduce costs of pump rebuilds.
The mechanical seal is leak tight and suitable for sewage
and sludge. The mechanical seal is fitted with tungsten
carbide vs. silicon carbide faces and Buna-N or Viton seal
elastomers. The arrangement incorporates an oil-filled seal
housing to lubricate the seal faces.
Material options include: Cast Iron bearing frame
with a Cast Iron pump casing and fitted with 316 stainless
steel or CD4MCu impeller and wear rings; complete 316 stainless
steel wet ends; complete CD4MCu wet ends.
Guards are fitted as standard to all moving parts.
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