Gardner Denver HD-2250, Operating And Service Manual

Page: 11 / 47

Page 5
hydrostatically tested, on test stands having
adequate guards to protect the operator, per
the
hose manufacturer's proof test
procedure.
Fluid end component inspections should
be performed more frequently than every
six months if pressures above 2500 psi
are used in the discharge system or if
corrosive, abrasive, flammable or hot
(over 110º F) fluids are being pumped.
Proper stuffing box packing selection is
important for safe pump operation. Contact
a Gardner Denver service representative for
assistance in selecting the proper packing
before beginning operation.
Before starting the pump the first time, and
periodically thereafter check the pump,
suction and discharge system fastener
torques versus the values listed on page 12
to insure proper tightness. Over and under
torquing can damage threaded pipes,
connections and fasteners, which may lead
to component damage and/or failure.
Replace all components found to be
damaged or defective. On pumps equipped
with stuffing boxes, the gland must be
engaged by at least three (3) threads to hold
the discharge pressure of the pump.
DANGER
Do not attempt to service, repair or
adjust the plunger packing or other-
wise work on the pump while the unit
is operating. Shut off the pump drive
engine and relieve the fluid pressure
in the suction and discharge systems
before any work or investigation is
performed on the pump or pump
systems.
Block the crankshaft from turning and make
certain that all pump drive motor or engine
start switches or starter controls are clearly
tagged with warnings not to start the pump
while repair work is in process.
Whenever
the pump is operating,
continually monitor the entire suction,
discharge and pump lubricating systems for
leaks. Thoroughly investigate the cause for
leakage and do not operate the pump until
the cause of the leak has been corrected.
Replace any parts which are found to be
damaged or defective. When a gasketed
joint is disassembled for any reason, discard
the used gasket and replace it with a new,
genuine Gardner Denver gasket before
reassembling the joint.
Due to the high working pressures contained
by the fluid end, discharge manifold and
discharge
piping, welding on these
components is not recommended. If
welding on the discharge system cannot be
avoided, only experienced, qualified welders
should be used. In addition, the welded part
should be hydrostatically proof tested in the
shop with water or hydraulic fluid to one and
one half times maximum discharge system
working pressure, with no observable fluid
leakage, before the part is reinstalled in the
pump system.
In summary, high pressure fluid streams can
possess sufficient energy to cause personal
injury, death and/or equipment damage.
These results can occur either through
direct contact with the fluid stream or by
contact with loose objects the fluid stream
has propelled, if the pump system is
improperly used, or if the fluid is
misdirected, or allowed to escape from
defective
or improperly maintained
equipment.
FLAMMABLE, HOT, COLD OR
CORROSIVE FLUID PUMPING
DANGER
Extreme caution must be exercised
by trained and experienced operators
when
flammable, hot, cold or
corrosive fluids are being pumped to
avoid personal injury, death an/or