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RELIEF VALVE SETTING AND ADJUSTMENT
The relief valve pressure setting is marked on a metal tag
attached to the valve cover. Generally, the relief valve should
be set at least 15 - 20 psi (1.0 - 1.4 Bar) higher than the
operating pressure, or the external bypass valve setting (if
equipped).
DO NOT remove the R /V Cap OR adjust the relief valve
pressure setting while the pump is in operation.
1.
To INCREASE the pressure setting,
remove the relief
valve cap, loosen the locknut, and turn the adjusting screw
inwar
d, or clockwise. Replace the valve cap.
2.
To DECREASE the pressure settin
g, remove the relief
valve cap, loosen the locknut, and turn the adjusting screw
outwar
d, or counterclockwise. Replace the valve cap.
Refer to the individual Blackmer pump parts lists for various
spring pressure ranges. Unless specified otherwise, pumps
are supplied from the factory with the relief valve adjusted to
the mid-point of the spring range.
Incorrect settings of the pressure relief
valve can cause pump component
failure, personal injury, and property
damage.
Hazardous pressure
can cause personal
injury or property
damage
Relief valve cap is exposed to
pumpage and will contain some fluid
Hazardous or toxic
fluids can cause
serious injury.
MAINTENANCE:
NOTICE:
Maintenance shall be performed by qualified technicians
only, following the appropriate procedures and warnings
as presented in this manual.
SCHEDULED MAINTENANCE
Failure to disconnect and lockout
electrical power or engine drive
before attempting maintenance can
cause severe personal injury or death
Hazardous
machinery can
cause serious
personal injury.
Failure to disconnect and lockout
electrical power before attempting
maintenance can cause shock, burns
or death
Hazardous voltage.
Can shock, burn or
cause death.
Failure to relieve system pressure
prior to performing pump service or
maintenance can cause personal
injury or property damage.
Hazardous pressure
can cause personal
injury or property
damage
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Hazardous pressure
can cause personal
injury or property
damage
If pumping hazardous or toxic fluids,
system must be flushed and
decontaminated, inside and out, prior
to performing service or maintenance
Hazardous or toxic
fluids can cause
serious injury.
LUBRICATION
NOTICE:
To avoid possible entanglement in moving parts do not
lubricate pump bearings, gear reducer or any other parts
while the pump is running
.
NOTICE:
If pumps are repainted in the field, ensure that the grease
relief fittings (76A) are functioning properly after painting.
Do NOT paint them closed. Remove any excess paint
from the fittings.
Pump bearings should be lubricated every one to twelve
weeks (AT MINIMUM), depending on the application, and
operating conditions.
Recommended Grease:
Mobil® - Mobilgrease XHP222,
or equivalent.
Greasing Procedure:
1. Remove the grease relief fittings (76A) from the bearing
covers (27A).
2.
SLOWLY
apply grease with a hand gun until grease
begins to escape from the grease relief fitting port.
3. Replace the grease relief fittings (76A).
DO NOT overgrease pump bearings. While it is normal for
some grease to escape from the grease tell-tale hole after
lubrication, excessive grease on pumps equipped with
mechanical seals can cause seal failure.
If equipped: Blackmer gear reducers are shipped from the
factory without oil in the gearcase. Fill with the grade of oil
indicated on the reducer tag. The oil should be changed after
the first 48 hours of use and approximately every 500 hours
of use thereafter.
