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.

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.

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