Portable Horizontal Single Stage Centrifugal Pump High Pressure Safety Maintenance Long
Features
1. Simple structure
2. Reliable peformance
3. Small volume
4. Easy operation and maintenance.
5. The suction and discharge pipes no need be taken down for pump cover and impeller disassembly.
6. The GHS parts are universally replaceable. The whole series have 46 models that only adopt six types of shaft. All parts may be universally exchanged.
Application
1. Applied to convey clean liquid
2. For water-supply & drainage for factory
3. For supplying chemical and physical liquid (clean water).
Construction
The pump is back exposed design , when open the casing cover and impeller, there is not necessary to dismantle suction pipe and discharge pipe. Bearing house is equipped with bearing. The bearing can be lubricated by oil or grease, and pump is directly driven by motor through the flexible coupling. Volute chamber, feet, inlet flange and outlet flange are castinged as a whole one.
| No. | Name |
| 1 | Pump body |
| 2 | Cap nut |
| 3 | Pipe plug |
| 4 | Impeller flat key |
| 5 | Impeller |
| 6 | Seal ring |
| 7 | Pump cover |
| 8 | Pump body O-ring |
| 9 | Suspension |
| 10 | Water deflector |
| 11 | Shaft cap |
| 12 | Shaft |
| 13 | Bearing |
| 14 | Suspension support |
| 15 | Pump connection flat key |
Operation
ELECTRIC MOTOR DRIVE
Install a starter with overload protection to prevent the motor being damaged by overload.
The overloads should be set so that they trip if the current exceeds the normal current of the
motor (see motor nameplate) by 10%. (N.B. Fire pumps may require exemption from this
note)
BEFORE STARTING
The pump is ready for starting when:
a) Pump base-plate is grouted and bolted to the foundation.
b) Pump and driver are correctly aligned.
c) Bearing lubrication is provided.
d) Stuffing box has been packed or fitted with seal.
e) Cooling water is supplied to bearing—if specified.
f) Prime mover has been checked for correct direction of rotation.
g) All rotating parts are found free by turning by hand.
h) Pump is primed. Never run a pump dry. The liquid in the pump serves as lubricant for close
running fits within the pump and the pump may be damaged if operated dry for an
extended period. The pump may be primed by using an ejector, exhauster or vacuum
pump. If a foot valve is used in the suction line, the pump may be primed by venting and
filling the casing with liquid.
RUNNING
While the pump is running, a periodic inspection should be made of:
a) Stuffing-Box
Keep stuffing-boxes (if soft packed, not fitted with mechanical seal) so that there is
sufficient leakage to lubricate the package.
b) Bearing
Check the bearing for temperature which should not exceed 70(160°F)
Grease nipples are provided for bearing lubrication. The grease lubrication interval is
dependent upon a number of factors and may vary with each application. As a guide the
period of lubrication should be approximately every 1000 running hours.
When the pump is used infrequently add lubricant every 12 months and rotate shaft by
hand a few revolutions each week.
c) Alignment
Successful operation of the pumps depends on accurate alignment. It is recommended to
re-check the alignment after preliminary run.
STARTING
Start the pump with discharge valve closed and bring it up to speed rapidly.
When pressure is reached open discharge valve slowly. Do not operate unit for prolonged
periods with closed discharge valve, so as to avoid overheating.
The pump should be shut down at once and the trouble corrected if the pump is running at its
rated speed and found to have any of the following defects.
a) No liquid delivered.
b) Not enough liquid delivered.
c) Not enough pressure.
d) Loss of liquid after starting.
e) Vibration.
f) Motor runs hot.
g) Pump bearing over-heating.
Work shop
