Goulds Pumps HS - IOM - Manual (Page 25)

LIQUID END
GENERAL INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CLEARANCE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GENERAL INSTRUCTIONS
See Fig. W16. The impeller of the HS pump is
recessed in a circular opening at the back of the casing.
The uniform running clearance between the impeller
and the casing keeps a uniform pressure around the
outside of the impeller, and the resulting hydraulic
forces on the impeller are low compared to the
conventional centrifugal pump. The bearing loads and deflection through the stuffing
box are reduced with the HS configuration. The
impeller is fitted with back vanes to reduce to axial
pressure unbalance and the resulting loads on the
thrust bearings.
The HS pump is designed to pass any solid which can
enter through the suction opening, provided the solid is
not significantly longer that it is wide. Most of the
solids do not flow through the impeller passageways.
HS IOM 5/08
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