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Oil Lubricated:
A.
Drain the oil from the bearing housings and refill to the recommended level with new oil. Recycle old oil
according to local ordinances.
B.
Place the pump in service per instructions in this manual.
Do not attempt to clean the pump until electrical power has been disconnected and it has been verified that
the pump cannot start.
Pump Identification:
General Description:
The 5800-NSF series pump consists of several components. The following is a list of those major parts (or
component assemblies) and a brief description of their design & function.
Removable Bearing Housings/Arms:
The pumps consists of upper and lower half casings containing the volute and suction passages, and removable
bearing housings that are doweled and securely bolted to the lower half casing. The inboard and outboard bearing
housings are replaceable without the need for field alignment.
Non-Removable Bearing Housing Arms:
The pumps consist of upper and lower half casings containing the volute and suction passages and bearing arms.
Casing:
Casing is axially split along the horizontal shaft centerline with flat-faced suction and discharge flanges and mounting
feet cast integral with the lower half casing. Casing is line-bored to assure concentricity and angular alignment. The
upper and lower half casings are a single volute design and doweled to permit easy removal and accurate
replacement of the upper half for inspection and maintenance.
The upper half casing shall be completely removable without disturbing the suction or discharge piping connections.
Suction and discharge connections are sized to reduce hydraulic friction losses and to reduce turbulence and pipe
noise. All suction and discharge flanges shall be designed for straight through nut-and-bolt flange connections.
Upper half casing shall have a drilled and tapped connection at the highest point on the casing for the purpose of
pump priming or air release. The lower half casing is drilled and tapped to allow for drainage piping.
Impeller:
Impeller is of the enclosed type, double-suction, Francis vane design, to minimize inlet losses and accommodate
high suction lifts. The Impeller is hydraulically and statically balanced to reduce bearing loading.
Impellers are precision cast in one piece with smooth flow contours to promote maximum efficiency. Impellers are
fixed axially along the shaft by shaft sleeves and nuts and secured to the shaft through a precision fit and full length
key.
The impeller skirt has sufficient metal thickness to allow machining for installation of impeller rings.
Shaft:
The pump shaft is manufactured of high quality heat treated steel of sufficient diameter to allow no greater than
0.003" maximum deflection measured at the sealing box for all normal performance conditions on the curve. The
shaft is manufactured to meet stiff shaft construction with a critical speed at least 25% in excess of operating speed,
in order to prevent vibration and fatigue and is accurately machined along its entire length. A keyway is machined at
the coupling end.
The shaft is reversible to provide for field change to opposite rotation if required. Renewable shaft sleeves are
provided to protect the shaft from wear and from contact with the pumped liquid. The sleeves also serve to
accurately position the impeller on the shaft.
FN-1060 1/7/2019
DANGER:
10
Fairbanks Nijhuis™
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