Torishima Pump MML User manual

Operating Instruction
MML
High Pressure Centrifugal Pump
PT. TORISHIMA GUNA INDONESIA

I. Introduction
Our machines are very high quality products, which will always give you completely satisfactory and trouble free service, if they
are erected, serviced and operated properly by skilled personnel. The instructions and recommendations contained in this booklet
should be carefully followed to obtain trouble-free operation, and it should be accessible to everyone in charge of the erection, operation
and maintenance of the machines. We shall gladly supply further copies on request.
Please get in touch with us if you require any expert advice. We shall be glad lo oblige, and this also applies to any repair work
which may be required, and which you may prefer to entrust to us. We can provide the services of a skilled fitter on request, or you may
prefer to send the machine back to our works for repair.
If the instructions contained in this booklet are followed, you will be covered by the guarantee contained in our conditions of
supply.
Our guarantee will however become void, if the machine is used to pump liquids or media other than those specified in the
confirmation of order, and at higher operating temperatures; if damage is caused to the machine as a result of improper manipulation,
operation outside the operating range specified, the use of unsuitable operating materials, faulty erection, wrong or unskilled laying of
the pipelines, etc.
During the validity period of the guarantee, any dismantling of the machine or its components may only be carried out after
receiving our previous consent in writing.
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Contents Pa
g
e
1.
2.
2.1.
2.1.1.
2.1.2.
2.1.3.
2.1.4.
2.1.4.1.
2.1.5.
2.1.6.
2.2.
2.3.
3.
3.1.
3.2.
3.2.1.
3.3.
3.4.
3.4.1.
3.4.2.
3.5.
3.5.1.
3.5.2.
3.5.3.
4.
4.1.
4.2.
Introduction
General construction of pump
Description of pump
Casing
Rotating assembly
Bearings
Stuffing boxes
Soft packed stuffing boxes
Coupling
Foundations
Driver
Mode of operation of pump
Erection
Erecting the pump
Fitting and dismantling the coupling
Aligning the coupling
Instrumentation
Piping
Suction piping (suction lift piping or positive suction head piping)
Discharge piping
Valves and fittings
Valves and fittings in suction line (suction lift line or positive suction head line)
Valves and fittings in discharge line
By-pass non-return valve
Operating instruction
Commissioning and starting up the pump
Supervision during running
1
2
2
2
2
3
3
3
5
5
6
6
7
7
8
8
9
9
9
10
10
10
11
12
13
13
13

4.3.
4.4
4.4.1.
4.4.2.
4.4.3.
4.4.4.
4.4.5.
4.5.
4.5.1.
4.5.2.
4.5.3.
4.5.4.
4.5.5.
4.5.6.
4.5.7.
5.
5.1.
5.2.
5.2.1.
5.2.2.
5.2.3.
5.3.
6.
7.
8.
Shutting down the pump
Maintenance
Maintenance of pump
Maintenance of soft-packed stuffing boxes
Maintenance of mechanical seal
Maintenance of bearings
Maintenance of balancing device
Operating troubles : causes and remedies
Pump does not deliver rated capacity
Driver is overloaded
Pump discharge pressure is excessive
Pump leaks
Stuffing boxes leak
Excessive bearing temperature
Excessive wear of balancing device
Dismantling and reassembling the pump
Dismantling
Reassembly
Reassembly of pumps with O-ring seals
Reassembly of pumps with metal to metal sealing faces
Assembling the bearing
Protection of pump during prolonged shut downs and transport
Spare parts
Stub shaft dimensions, packing details, cooling water and oil
requirements, bearings, seals, gasket and O-rings
List of components and sectional drawings
14
14
14
14
15
16
17
18
18
19
20
20
20
21
21
22
22
23
23
24
24
25
25
26
27

2. General construction of pump
2.1. Description of pump
MML pumps are normally employed where the total head ranges from 215 to 710 Ib/in2 = 15 to 50 kg/cm*. The size designation
is in accordance with the bore of the discharge flange, e.g. MML 40 has a discharge bore of 40 mm = 1.5 in, etc. Constructional details
are shown in the sectional drawings at the end of this booklet.
2.1.1. Casing
MML high pressure pumps are multistage centrifugal pumps, with a radially split casing. The casing consists of the suction and
discharge casings (see sectional drawing, page 28, part Nos. 1060 and 1070) and of a number of intermediate, or stage casings
(IOSO). The individual casing components are clamped together by tie bolts (9050).The intermediate casings and tie bolts are encased
in a sheet steel cladding, and pumps which are intended for very hot liquids have a layer of insulating material underneath the cladding.
The diffusers (1710) are inserted between each successive pair of intermediate casings. The stuffing box housings (4510), and bearing
brackets (3500) are flanged onto the suction and discharge casings by studs. If the nature of the fluid pumped and the operating
conditions permit it, the casing components are made of high grade cast iron. Where necessary, bronze, cast steel or chrome steel are
used for these components. The diffuser are made of cast iron, bronze or chrome steel, as required.
A leak-proof joint between the individual casing components is ensured by inserting rings (4120.5) profile seals, gaskets, or by
providing ground metal-to-metal joints, according to the operating temperature, and the material of the casings. In the latter case, the
pressure necessary to seal the metal-to-metal faces is provided by correct tensioning of the tie bolts.
The suction and discharge casings include integrally cast feet, the position of which varies according to the execution and
application of the pump and the temperature of the liquid; usually the feet are at the bottom of the casings, but for elevated operating
temperatures they may be at shaft centerline level in order to obviate any damage due to uneven expansion in the pump. Renewable
case wear rings (5020) are fitted to the suction casing and intermediate stage casings, which can be renewed when the wear has
become excessive.
2.1.2. Rotating assembly
The shaft (2100) transmits the torque generated by the driver, in equal proportions to all the impellers, via the impeller keys.
The spacer sleeves (5251, and 521 or also 5252 on pump sizes 150 and above), ensure the correct axial location of the impellers and
also act as shaft protecting sleeves. The correct axial position of the whole rotor assembly is maintained by the balance disc (6010),
which also absorbs the axial thrust. The shaft protecting sleeves ( 5240.1, 5240.2 ) provided to protect the shaft where it passes
through the stuffing box packing are screwed on to the shaft, one having a left-hand and the other a right-hand thread.
Fig. 2
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