Torishima Pump MML Operating Instruction
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Torishima Pump MML Operating Instruction

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

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Summary of Contents for Torishima Pump MML

  • Page 1 Operating Instruction High Pressure Centrifugal Pump PT. TORISHIMA GUNA INDONESIA...

  • Page 2: Introduction

    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.

  • Page 3: Table Of Contents

    Contents Page Introduction General construction of pump 2.1. Description of pump 2.1.1. Casing 2.1.2. Rotating assembly 2.1.3. Bearings 2.1.4. Stuffing boxes 2.1.4.1. Soft packed stuffing boxes 2.1.5. Coupling 2.1.6. Foundations 2.2. Driver 2.3. Mode of operation of pump Erection 3.1. Erecting the pump 3.2.
  • Page 4 4.3. Shutting down the pump Maintenance 4.4.1. Maintenance of pump 4.4.2. Maintenance of soft-packed stuffing boxes 4.4.3. Maintenance of mechanical seal 4.4.4. Maintenance of bearings 4.4.5. Maintenance of balancing device 4.5. Operating troubles : causes and remedies 4.5.1. Pump does not deliver rated capacity 4.5.2.

  • Page 5: General Construction 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.

  • Page 6: Bearings

    2.1.3. Bearings The rotor assembly in MML pumps sizes 40 to 150 inclusive runs in two anti-friction bearings; from MML 200 and upwards two plain bearings are used. The bearing brackets (3500) flanged to the suction and discharge casings are identical in dimensions. The rotor assembly is afforded a small amount of axial float by the plain bearings and also by the anti-friction bearings, which are NU series taper lock sleeve cylindrical roller bearings (3220).
  • Page 7 Stuffing Box Conventional Types Cooling Liquid HW 105 °C<t<220°C Stuffing Boxes Special Types Hushing fluid Medium Compressed : For liquids with entrained abrasive particles, when the packing must be protected againts the penetration of any abrasive materials ( e. g. oil with Kieselgur, fractions from the catalytic cracking plan with entrained abrasive particles). Sealing, resp, leakage liquid Medium Compressed : For liquid that have to be drawn off under vacuum, (e.

  • Page 8: Coupling

    Cooling or heating liquid Medium Compressed : For LPG, expect liquefied propone below 130 °F (55 °C) above lubricant and heat transfer media (e. g. Down them) below 360 °F (180 °C) above. Fig. 6. Flexible Coupling 2.1.5. Coupling The pump and driver are connected to each other by a flexible coupling. Fig. 6 illustrates the type of flexible coupling most frequently used.

  • Page 9: Driver

    Dςp (= seaIing clearance gap diameter) and inside diameter DA ( = o.d. of spacer sleeve). This axial thrust A is transmitted to the rotor and is absorbed by a special hydraulic balancing device on MML series pumps.

  • Page 10: Erection

    Fig. 8 Characteristic curves at constant pump speed Fig. 8 illustrates the fact that the power absorbed by the pump does not decrease proportionately with the reduction in pump capacity; on the contrary, the power absorbed at shut-off head (capacity Q = O) is quite considerable. This absorbed power is transformed almost wholly into heat within the pump, and this will rapidly lead to over heating and vapor formation in the pump, when it is operated for any length of time against a closed discharge valve, or at very low through puts;...

  • Page 11: Fitting And Dismantling The Coupling

    7. After the piping is connected, the alignment at the coupling should be checked once again. It should be possible to rotate the rotating assembly easily by hand on the coupling, if the stuffing boxes are not packed (see section 3.2.1). 8.

  • Page 12: Instrumentation

    3.3. Instrumentation In order to facilitate operating supervision, we recommend that each pump be provided with pressure gauges (with large dials) at the suction and discharge nozzle and on the balance water line. These gauges should incorporate a gauge cock or valve.

  • Page 13: Discharge Piping

    Eccentric reducer (fitted belly down) Fig. 12 .11a Suction lift line Fig. 11b For positive suction head lines, (see fig. 11b), the same considerations apply as for suction lift lines, as regards features and laying of the line. The horizontal sections of the line should however be laid with a gently rising incline towards the suction vessel.

  • Page 14: Valves And Fittings In Discharge Line

    An isolating valve should only be incorporated in a suction lift line, if more than one pump is connected too common suction line. In such cases, the valve should be installed with its stem horizontal, or pointing vertically downwards, to prevent the formation of air pockets.
  • Page 15 It must always be installed vertically, with the direction of flow from bottom to top. Its construction and mode of operation is illustrated in fig. 14 and 14a, Name of Part Body Cover By-Pass Outlet Bearing Cover Seal Venturi Rocker Guide Rocker Arbor Washer...

  • Page 16: Operating Instruction

    4. Operating instructions 4. 1. Commissioning and starting up the pump A. Points to be checked prior to commissioning or start-up: 1 .Check the oil level in the bearings of the pump, and if necessary replenish until the oil runs out of the over flow. 2.

  • Page 17: Shutting Down The Pump

    4. 3. Shutting down the pump 1. Close discharge valve. 2. Switch off driver, and observe pump rotor running down to a stand still. 3. Turn off cooling water, when the pump has cooled down below 105 °C (220 °F). This only applies to pumps with cooled stuffing boxes or bearings.

  • Page 18: Maintenance Of Mechanical Seal

    Before insertion in the stuffing box, cotton vibration packing rings must be thoroughly soaked in oil, but asbestos vibration packing rings should only be coated with oil on the inside. The first ring is wrapped around the sleeve and carefully pushed to the bottom of the pacing compartment by means of the stuffing box gland.

  • Page 19: Maintenance Of Bearings

    If the carbon rings and rotary rings have to be renewed, they should never be placed anywhere with their working faces down, since even the slightest scoring of the highly finished surfaces may result in leakage. Fig. 17 Auxiliary Stuffing Box 1758:15 4.4.4.
  • Page 20 0.3 mm 0.2 mm 0.5 mm casing, ; and the discharge casing (1070), or in MML sizes 200-350, between the 'pacer sleeve in the discharge-casing (5252) and the bush M - 17 - 18) in the discharge casing (1070) *) If the wear rings and spacer sleeves are of chrome steel, the above listed clearances should be slightly increased . This is also true where the materials of construction used have different heal elongation coefficients and, as a result, excessive closing-in of the clearances could take place when fluids are pumped at high temperatures.

  • Page 21: Operating Troubles Causes And Remedies

    5020/2300, or 1060/5251, or 1070/6010 (on sizes MML 40-125), or 1070/5252 (on sizes MML 150-350), or 6010 or 5252 and 5210 (on sizes MML 200- 350), as the case may be. Adjust as necessary, or replace worn components by new ones.

  • Page 22: Pump Leaks

    4. 5. 2. Overloading of driver Possible cause Remedy 1. Pump discharge pressure is lower than specified at the Partially close the isolating valve in the discharge line until the design stage, and in the confirmation of order (check pump discharge pressure corresponds with the figure on the figures on the pump rating plate).

  • Page 23: Stuffing Boxes Leak

    (5252) in the discharge casing, or in the case of pump sizes MML 40-125, adjust the hub of the balance disc (fig. 21).

  • Page 24: Dismantling And Reassembling The Pump

    Fig. 19 Withdrawing the balance disc. In MML pump sizes 150-350, the balance disc (6010) and the spacer sleeve (5252) in the discharge casing are separate components, but share the same key on the shaft. This key must always be removed before the sleeve (5252) is withdrawn.

  • Page 25: Reassembly

    To facilitate removal of components mounted on the shaft of a pump that has been in service for a prolonged period, the use of one of the better-know rust solvents is recommended. If this proves ineffective, the parts in question (not the shaft) may be expanded by gradually heating up with a blow lamp.

  • Page 26: Reassembly Of Pumps With Metal To Metal Sealing Faces

    After mounting the last impeller, and, in the case of pomp sizes MML 150-350, the spacer sleeve on the discharge side, the discharge cover (1070) with diffuser (1711) of final stage and the last O-rings (4120.5,4120.6) are fitted.

  • Page 27: Assembling The Bearing

    A part from special types, MML pump sizes 40-125 are fitted with taper lock sleeve roller bearings these combine the two features of a tight fit on the shaft required by the design, and an assembly which can be readily dismantled, so that there practically no risk of the bearing being damaged by having to use force to remove it from the shaft.

  • Page 28: Spare Parts

    1). When plain bearing are fitted ( MML 200 – 350 ) according to fig. 26 2). For pumps fitted with mechanical seals, see section 2. 1. 4. 2.

  • Page 29: Stub Shaft Dimensions, Packing Details, Cooling Water And Oil

    7. Stub shaft dimensions, packing details, cooling water and oil requirements, bearing details, seals gaskets and O-rings. Size of pump MML Stub shaft dimensions 24¯ x 60 28¯x60 28¯x60 34¯x80 45/65¯ 34¯x10 42¯ x 120 Dimensions of stuffing box compartment 34/50¯x35...
  • Page 30 9. Sectional drawings and list of components Size MML 40, 50, 65 Stuffing box housing : Type N Name Material Name Material Name Material 1060 Suction casing 4120.5 O-ring 9021 Stud SUS420J, 1070 Discharge casing 4120.6 O-ring ASBEsTOS 9050 Tie bolt...
  • Page 31 Size MML 40, 50, 65 Stuffing box housing : Type HW Name Material Name Material Name Material 1060 Suction casing FC 250 4120.1 O-ring VITON 6020 Balance disc seat FC 200 1070 Discharge casing FC 250 4120.2 O-ring N B R...
  • Page 32 Size MML 80, 100, 125 Stuffing box housing : Type N Name Material Name Material Name Material 1060 Suction casing 4120.6 O-ring ASBESTOS 9050 Tie bolt S C M 3 1070 Discharge casing 4510 Stuffing box housing 9201.1 Hexagonal nut...
  • Page 33 Size MML 80, 100, 125 Stuffing box housing : Type HW Name Material Name Material Name Material 1060 Suction casing FC 250 4120.3 O-ring N B R 6240 Pivot for indicator SS 40 1070 Discharge casing FC 250 4120.4 O-ring...
  • Page 34 Size MML 150 Stuffing box housing : Type N Name Material Name Material Name Material 1060 Suction casing 4510 Stuffing box housing 6240 Pivot for indicator S 30 C 1070 Discharge casing 4520 Stuffing box gland 6801 Cladding S P C C...
  • Page 35 Size MML 150 Stuffing box housing : Type HW Name Material Name Material Name Material 1060 Suction casing FC 250 420.4 O-ring VITON 6010 Balance disc 1070 Discharge casing FC 250 4120.5 O-ring VITON 6020 Balance disc seat 1080 Stage casing FC 250 4120.6 O-ring...
  • Page 36 TORISHIMA PUMP MFG.CO.,LTD. Head Office & Works : 1 −8, Miyata−ch −1 o, T akatsuki City, Osaka, Japan. Phone : 0726−95−0551 Telex : 5336568 TORIPUJ Telefax: 0726−93−1288 TORISHIMA SINGAPORE TORISHIMA SINGAPORE PTE.LTD. 30 Ubi Crescent # 01 ˘ 02 Ubi Tech Park Singapore 408566 Phone : (65)67790123 Fax : (65) 67796900...

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