Circor IMO K12DHZ-312P Product Service Manual
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Circor IMO K12DHZ-312P Product Service Manual

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K12DHZ-312P Pump
PRODUCT SERVICE MANUAL
Imo Part Number / BOM # 3220/523
WARNING
This manual and the "General Installation, Operation, Maintenance and
Troubleshooting Manual" (SRM00046) should be read in their entirety prior
to installing, operating or servicing this pump.
Manual No. SRM00102
Rev 01 (21-2001)
October, 2021
1

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Summary of Contents for Circor IMO K12DHZ-312P

  • Page 1 K12DHZ-312P Pump PRODUCT SERVICE MANUAL Imo Part Number / BOM # 3220/523 WARNING This manual and the “General Installation, Operation, Maintenance and Troubleshooting Manual” (SRM00046) should be read in their entirety prior to installing, operating or servicing this pump. Manual No. SRM00102 Rev 01 (21-2001) October, 2021...

  • Page 2: Table Of Contents

    READ ENTIRE PAGE BEFORE PROCEEDING FOR SAFETY OF PERSONNEL AND TO PREVENT DAMAGE TO EQUIPMENT, THE FOLLOWING NOMENCLATURE HAS BEEN USED IN THIS MANUAL: DANGER Failure to observe precautions noted in this box can result in severe bodily injury or loss of life. WARNING Failure to observe precautions noted in this box can cause injury to personnel by accidental contact with equipment or liquids.

  • Page 3: General Instructions

    GENERAL INSTRUCTIONS Instructions found herein cover disassembly, assembly and parts identification for the K12DHZ- 312P pump. NOTE: Individual contracts may have specific provisions that vary from this manual. Should any questions arise which may not be answered by these instructions, refer to General Instructions Manual, CA-1, provided with your order.

  • Page 4: Pump Model Identification

    PUMP MODEL IDENTIFICATION This service manual covers the K12DHZ-312P pump. Model of pump is identified on pump nameplate. Refer to Pump assembly drawing and Table 2 for instructional keys when using this manual. Design Modification Lead and Rotation Series P = 1.6D, CW Letter Designator (Seal Design) H- Positive Drive...
  • Page 5 F.2 OPERATING LIMITS CAUTION ATTENTION Operating conditions, such as speed, fluid viscosity, temperature inlet pressure, discharge pressure, filtration, duty cycle, drive type, mounting, etc., are interrelated. Due to these variable conditions, specific application limits may be different from that of operational limitations.
  • Page 6 Figure 1 - RECOMMENDED AREAS FOR PUMP INSULATION SEE NOTE 2 .188 ( ) [ ( 4.78 ] ( ) .177 ( ) [ ( 4.50 ) ] ( ) REAR PUMP FOOT SHIMS BY .75 [19.1] CUSTOMER MIN ENGAGEMENT INSTALL CAP SCREW WITH LOCTITE DETAIL A THREADLOCKER PRODUCT NO.

  • Page 7: Parts List

    G. PARTS LIST Table 2 – Pump Parts List IDP QTY DESCRIPTION IDP QTY DESCRIPTION Case Bearing Retaining Ring Inlet Head Bearing Retainer Dowel Pin Inboard Cover Case Bolts Bearing Retainer Bolts Stop Pin Seal Seat Adapter Dyna Seal Ball Bearing Housing Retaining Ring Power Rotor Inlet O-Ring...
  • Page 8 WARNING Fluid leakage from disassembly of pump may make floor slippery and cause personal injury. 1. Close suction and discharge piping to pump and disconnect piping. Remove seal piping (71). Remove drain plugs (67), and drain unit. Remove pump from driver, coupling and base plate. Remove coupling hub and key (31).
  • Page 9 b. Sealed ball bearing is assembled to power rotor (63) with a light press fit. Ball bearing (49) may be removed by using a bearing puller or a vertical arbor press. When using press, two pieces of key stock are to be placed through openings of mechanical seal seat adapter (48) underneath ball bearing (49) on both sides of power rotor shaft.
  • Page 10 first application is much higher than for subsequent applications. To ensure required preload on Nylok fastener is achieved for each application, the following procedure is mandatory assembly practice. 1. Using a suitable torque wrench, install fastener in mating piece until Nylok insert is completely engaged.

  • Page 11: Troubleshooting

    10. Install assembled power rotor (63) in pump, centering all parts as they enter inboard cover (46). Align one of openings in spacer (48) over drain in inboard cover (46). 11. Install bearing retainer (43) on inboard cover (46) using bolts (47). Torque bolts to values indicated on assembly drawing.
  • Page 12 Our factories provide maintenance, overhaul and test facilities in event user prefers to return pumps for inspection or overhaul. Pumps that have been factory-overhauled are normally tested and warranted “as- new” for a period of one year from date of shipment. For either field service or factory overhaul assistance, contact your local Imo Sales Office or representative at Technical/Customer Service Department in Monroe, NC, USA.
  • Page 14 CIRCOR 1710 Airport Road PO Box 5020 Monroe, NC USA 28111.5020 Tel: +1. 877.853.7867 Email: cc@circor.com Web: www.circorpt.com © 2021 CIRCOR Pumps North America, LLC. All rights reserved.

This manual is also suitable for:

Imo 3220/523

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