Multitech 1777.8/7-10 G3 Operating Instructions Manual
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Multitech 1777.8/7-10 G3 Operating Instructions Manual

High-pressure pumps in ring-section design
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Operating instructions
1777.8/7-10
G3
Works No.:
__________________________________
Type series:
__________________________________
These operating instructions contain fundamental
information and precautionary notes. Please read
the manual thoroughly prior to installation of unit,
connection to the power supply and commissioning. It is
imperative to comply with all other operating instructions
referring to components of this unit.
This manual shall always be kept close to the unit's
location of operation or directly on the pump set.
Multitec
High-pressure pumps in
ring-section design

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Summary of Contents for Multitech 1777.8/7-10 G3

  • Page 1 Operating instructions 1777.8/7-10 Works No.: __________________________________ Type series: __________________________________ These operating instructions contain fundamental information and precautionary notes. Please read the manual thoroughly prior to installation of unit, connection to the power supply and commissioning. It is imperative to comply with all other operating instructions referring to components of this unit.

  • Page 2: Table Of Contents

    Contents General Safety Marking of instructions in the manual Personnel qualification and training Non-compliance with safety instructions Safety awareness Safety instructions for the operator / user Safety instructions for maintenance, inspection and installation work Modification and manufacture of spare parts by customer Unauthorized modes of operation Transport / Storage...

  • Page 3: Personnel Qualification And Training

    Index Adjusting dimensions for coupling alignment, pump sizes 32 to 65, versions E, Ex, F, Fx, V, Vx Aligning the pump / drive Applications Bearings Bearings and lubrication Checking the direction of rotation Commissioning Commissioning, start-up / shutdown Connecting the motor Connecting the piping Connection to power supply Contact guard...

  • Page 4: General

    General The Multitec pump has been developed in accordance with state-of-the-art technology; it is manufactured with utmost care and subject to continuous quality control. These operating instructions are intended to facilitate operation of the pump and help in commissioning and maintenance. The manual also contains important recommendations for reliable, proper and efficient operation.

  • Page 5: Safety Instructions For Maintenance, Inspection And Installation Work

    Safety instructions for the operator / user - Any hot or cold components that could pose a hazard must be equipped with a guard by the operator. - Guards which are fitted to prevent accidental contact with moving parts (e.g. coupling) must not be removed whilst the unit is operating.

  • Page 6: Description Of The Product And Accessories

    Description accessories Technical specification Multistage centrifugal pumps in ring-section design with suction impeller for low NPSH value (exception: MTC 32). Horizontal design, baseplate mounted 1 casing entry, drive end 1 rolling element bearing, drive end 1 plain bearing, suction end axial suction nozzle for the entire H/Q range same as installation type A, but...

  • Page 7: Installation At Site

    Installation at site Safety regulations / Special instructions Electrical equipment operated explosive atmospheres must comply with the relevant explosion protection indicated on the motor rating plate. If the equipment is installed in potentially explosive atmospheres, the applicable local explosion protection regulations and the regulations of the test certificate supplied with the equipment and issued by the responsible approval authorities must be observed and complied with.

  • Page 8: Aligning The Pump / Drive

    5.3.1 Aligning the pump / drive Coupling guard compliance with Caution regulations the pump must not be operated without a coupling guard / a guard on the drive lantern. If the customer specifically requests not to include a coupling guard / lantern guard in our delivery, then the operator must supply one.

  • Page 9: Connecting The Piping

    Connecting the piping Suction lift lines shall be laid with a rising slope towards the pump and suction head lines with a downward slope towards the pump, to prevent the formation of air pockets. With short pipelines, the nominal diameters should be at least equal to the nominal diameters of the pump nozzles.

  • Page 10: Vacuum Balance Line

    5.4.1 Vacuum balance line Where liquid has to be pumped out of a vessel under vacuum, it is advisable to install a vacuum balance line. This line shall have a minimum nom. diameter of 25 mm and must extend above the highest permissible liquid level of the vessel.

  • Page 11: Commissioning, Start-Up / Shutdown

    Commissioning, start-up / Shutdown Instructions for boiler feed applications Limit values for boiler feed water and condensate when using cast iron pump parts: pH value ³ 9.0 (target: ³ 9.3) content 0.02 ppm. ≤ These values must be ensured under all operating conditions before entry into the pump.

  • Page 12: Contact Guard

    6.1.3 Contact guard In compliance with health and safety regulations the pump must not be operated without a coupling guard. If the customer specifically requests not to include a coupling guard in our delivery, then the operator must supply one. 6.1.4 Connection to power supply If the pump is equipped with an electric motor, connection to the power supply must be effected by a trained electrician only.

  • Page 13: Switching Frequency

    6.2.2 Switching frequency The permissible number of start-ups in a given period of time depends on the circumstances prevailing in the plant and the operating conditions. Overloading of the motor may generally result in: - an abnormal increase in motor temperature exceeding the temperature limit of the winding or bearing grease - premature coupling wear - reduced service life of the pump components...

  • Page 14: Servicing / Maintenance

    Servicing / maintenance General instructions The operator is responsible for ensuring that all maintenance, inspection and installation work be performed by authorized, qualified personnel who are thoroughly familiar with the manual. A regular maintenance schedule will help avoid expensive repairs and contribute to trouble-free, reliable operation of the pump with a minimum of maintenance expenditure and work.

  • Page 15: Shaft Seal

    Oil quality / Oil change Quality: ISO VG 46. The first oil change shall be carried out after 300 operating hours, the following ones every 3000 operating hours. Unscrew the screwed plug in the re-fill hole and in the drain hole. Allow the bearing housing to drain completely, then plug the drain hole again.

  • Page 16: Dismantling The Bearings

    7.3.3 Dismantling the bearings The sections below describe partial dismantling (bearings, seals, etc.) and complete dismantling of the pump unit. 7.3.3.1 Dismantling the non-drive-end bearings Plain bearing The plain bearing is removed without dismantling the hydraulic section of the pump. Axial suction nozzle: Fig.
  • Page 17 7.3.3.2 Dismantling the drive-end rolling element bearings N.B.: The ceramic bearing installed at the non-drive end need not be dismantled in order to remove the drive-end rolling element bearings. If the pump is oil-lubricated, the oil must be drained before dismantling. - After loosening the grub screw in the coupling hub pull out coupling half with key 940.3.

  • Page 18: Dismantling And Replacement Of Shaft Seals

    7.3.4 Dismantling and replacement of shaft seal Gland packings 7.3.4.1 Replacing the packing rings Access to packing rings without removing the bearing or the lantern: - Undo both nuts 920.3 and pull gland cover 452 out of seal housing 441.1. - Remove packing rings 461.
  • Page 19 7.3.5.2 Removing an air-cooled mechanical seal (seal code 64) Fig. 33 N.B.: This mechanical seal design is used for application temperatures from 140 to 200°C and Multitec sizes 32 to 100. The pump shall only be coupled to a motor with enclosure IP 55. - Remove the bearing as described in sections 7.3.3.1 and 7.3.3.2.

  • Page 20: Dismantling The Hydraulic System

    7.3.6 Dismantling the hydraulic system - Remove the bearings as described in sections 7.3.3.1 and 7.3.3.2 and the shaft seals as described in sections 7.3.4 and 7.3.5. If possible, place the hydraulic system in vertical position and start dismantling it from the discharge end. - Undo the four tie bolts 905.

  • Page 21: Tightening Torques - Tie Bolts, Part No. 905

    7.4.1 Tightening torques - Tie bolts, part No. 905 Material codes 10, 11, 12, 13 (casing: cast iron) Pump size Tightening torque Nm Multitec 32 Multitec 50 Multitec 65 Multitec 100 Multitec 125 Multitec 150 Material code 20 to 30 (Casing: steel or stainless steel) Pump size Operating pressure...

  • Page 22: Bearings

    Mechanical seals Mechanical seals are precision components. The Caution seat ring and the spring-loaded ring must always be replaced together, i.e. always replace the entire mechanical seal. To ensure trouble-free operation of the mechanical seal, the seal faces and the tools must be absolutely clean. Mechanical seals must be installed with utmost care.

  • Page 23: Tightening Of Shaft Nuts On Multitec Pumps

    When tightening the shaft nuts, please observe the following: Caution The shaft nuts must be tightened to the torques indicated in the table ”Tightening torques for shaft nuts”. Tightening the shaft nuts on Multitec pumps Shaft nuts without lockwasher Not applicable to drive end on MTC 32/50/65 with self-locking shaft nut Caution Tightening torques for shaft nuts Drive end...
  • Page 24 If there is no suitable torque wrench available for tightening the shaft nuts, proceed as follows, depending on the pump version: Self-locking nut on drive end (or non-drive end on versions C und D) Tighten the shaft nut firmly Loosen the shaft nut again Apply thread-locking agent to the thread (e.g.

  • Page 25: Re-Adjusting The Clearance Gaps

    Radial bearing Versions C and D are equipped with a deep-groove ball bearing as radial bearing. (The other versions are fitted with a plain bearing in the suction casing). The outer race of the deep-groove ball bearing must have axial play. The bearing is installed without spacer discs 551.1.

  • Page 26: Trouble-Shooting

    Trouble-shooting Cause Pump delivers against an excessively high discharge pressure. Pump or piping are not completely vented or primed. Supply line or impeller clogged. Formation of air pockets in the piping. * * * Suction head is too high / NPSH Air intake at the shaft seal.

  • Page 27: General Assembly Drawings

    General assembly drawing Pump sizes 32 to 100 Radial suction nozzle Version without balance drum Axial suction nozzle up to pump size 50 1) for pump models with mechanical seal only 2) pump size 65 and above 3) pump size 100 and above 4) except pump size 32 5) pump sizes 32 and 50 only 6) hydraulics 9.2/10.2/11.1 and 12.1 only...
  • Page 28 Close-coupled pump up to pump size 65 Radial suction nozzle Vertical design Pump sizes 32, 50 and 65 Vertical design Pump sizes 100, 125 and 150 1) for pump models with mechanical seal only 2) pump size 65 and above 3) pump size 100 and above 4) except pump size 32 5) pump sizes 32 and 50 only...
  • Page 29 Pump sizes 125 and 150 Version B Version C 1) for pump models with mechanical seal only 2) pump size 65 and above 3) pump size 100 and above 4) except pump size 32 5) pump sizes 32 and 50 only 6) hydraulics 9.2/10.2/11.1 and 12.1 only 7) for variant with balance drum only Material codes 20, 21, 22, 23 and 30...

  • Page 30: List Of Components

    List of components This list includes all components mentioned in this document Part No. Description 106.1/2 Suction casing Discharge casing 108.1 Stage casing 160.1/2 Cover 171.1 Diffuser Pump stool Foot Shaft 230.1/3 Impeller Suction stage impeller 320.1/2 Rolling element bearing Drive lantern Thrust bearing lantern 350.1...

  • Page 31: Adjusting Dimensions For Coupling Alignment

    Adjusting Dimensions for Coupling Alignment, Pump sizes 32 to 65, Pump versions E, Ex, F, Fx, V, Vx Cotes de réglage pour alignement de l’accouplement tailles 32 jusqu’à 65, Exécutions E, Ex, F, Fx, V, Vx Einstellmaße für Kupplungsausrichtung Baugrößen 32 bis 65 Ausführung E, Ex, F, Fx, V, Vx Bild 44 Fig.
  • Page 32 Multitec KSB Aktiengesellschaft P.O. Box 1361, 91253 Pegnitz · Bahnhofplatz 1, 91257 Pegnitz (Germany) Tel. +49 9241 71-0 · Fax +49 9241 71-1791 · www.ksb.com...

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