1. Manuals
  2. Brands
  3. IWAKI AMERICA Manuals
  4. Water Pump
  5. MDF-L Series
  6. Instruction manual

IWAKI AMERICA MDF-L Series Instruction Manual

Magnetic drive pump
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
IWAKI AMERICA
MDF-L SERIES
MAGNETIC DRIVE PUMP
INSTRUCTION MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MDF-L Series and is the answer not in the manual?

Questions and answers

Related Manuals for IWAKI AMERICA MDF-L Series

Summary of Contents for IWAKI AMERICA MDF-L Series

  • Page 1 IWAKI AMERICA MDF-L SERIES MAGNETIC DRIVE PUMP INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    MDF-L SERIES INSTRUCTION MANUAL Table of Contents UNPACKING AND INSPECTION ........................1 MODEL IDENTIFICATION GUIDE .......................2 SPECIFICATIONS .............................3 ........................4 ATERIALS OF OMPONENTS HANDLING INSTRUCTIONS ..........................5 INSTALLATION, PIPING, AND WIRING .....................8 ............................8 NSTALLATION OSITION ..............................8 NSTALLATION ................................9 IPING ..............................9 UCTION IPING ............................11...

  • Page 3: Unpacking And Inspection

    Thank you for selecting an Iwaki America MDF-L Series magnetic drive pump. This instruction manual explains the correct handling, operating, maintenance, inspection and troubleshooting procedures for your pump. Please read through it carefully to ensure the optimum performance, safety and long service of your pump.

  • Page 4: Model Identification Guide

    Model Identification Guide MDF-L Pump Size Model Suction Discharge Motor HP Motor Frame ¾ 1 ½ 1 ½ 1 ½ 1 ½ 145TC 1 ½ 182TC 1 ½ 184TC Bearing System Bearing option Thrust collar, inboard 99.8% alumina ceramic Thrust collar, outboard PTFE Bushing Carbon...

  • Page 5: Specifications

    ETFE type: 32 - 194°F (0 - 90° C) Some models may be operated in a temperature of 194 - 212°F (90 - 100°C). Consult Iwaki America or your distributor. Slurry: In general, slurries should not be handled. However, a pump with a ceramic bearing system, AA, can handle slurries if the hardness is 80Hs or below, with a maximum grain size of 2 MIL (50 microns) and maximum density 5% wt.

  • Page 6: Materials Of Main Components

    Materials of Main Components Figure 1 Parts 1. Casing liner 20% carbon reinforced fluoroplastic ETFE 2. Containment shell 3. Bushing High density carbon 99.8% alumina ceramic 4. Shaft 99.8% alumina ceramic 5. Thrust collar, inboard 6. Impeller 20% carbon fiber reinforced fluorplastic ETFE 7.

  • Page 7: Handling Instructions

    Handling Instructions Do not operate the pump dry The sliding parts used in the MDF-L series pump are lubricated and cooled by the fluid being pumped. Never operate the pump dry or with the valves on the suction side closed.
  • Page 8 AA or KK type, can handle slurries if the hardness is 80 Hs or below, with a maximum grain size of 2 MIL (50 microns) and the maximum density 5% wt. Contact Iwaki America or your distributor for details. Influence of specific gravity on pump performance The performance of the MDF-L pump does not change when pumping fluids of high specific gravity.
  • Page 9 Ambient temperature range: 32 - 104° F (0 - 40°C) Refer to corrosion resistance tables for the recommended temperature range for various types of liquids. In case of any questions, contact Iwaki America or your distributor to determine if operation is feasible.

  • Page 10: Installation, Piping, And Wiring

    (suction lift), be sure to arrange a foot valve in the suction pipe. The lifting capability depends upon the liquid properties, temperature, and length of suction piping. For details, consult Iwaki America or your distributor.

  • Page 11: Piping

    Avoid installations with poor suction conditions (e.g. vacuum in suction tank, large suction head or long suction piping). NPSHa should always be at least 2 feet greater than NPSHr. For NPSHr values, refer to the standard performance curve for your pump model or contact Iwaki America or your distributor.
  • Page 12 When using a bend on the suction side, install a straight pipe which is more than 20 inches long or 10 times as long as the suction port diameter before the suction port of the pump. Use the largest possible radius of curvature for the bend. Do not allow any projection where air may be trapped along the suction pipe.

  • Page 13: Discharge Piping

    Discharge Piping Use proper pipe supports so that the weight of the piping does not load the pump nozzle. If a method other than flooded suction is used, install a special pipe for priming. If the piping is very long, its diameter should be determined by calculating the piping resistance.

  • Page 14: Wiring

    The installation of a gate valve on the discharge pipe is recommended for the adjustment of discharge quantity and for the prevention of motor overload. When installing both a check valve and a gate valve, the check valve should be positioned between the pump and the gate valve.

  • Page 15: Operation

    For pumps using a motor of 10 HP or larger, use of a soft start motor voltage/amperage device is recommended. Refer to the wiring examples shown above. (These examples do not include the installation of a dry run prevention device. Follow the instruction manual of the dry run prevention device when installing it.) Operation Notes on Operation...

  • Page 16: Start-Up Preparation

    If the direction is reversed, exchange two wires of the three-phase power wires. Note: All Iwaki America MDF-L series pumps rotate counter-clockwise when looking at the suction port of the pump. Naturally, from the motor fan side, this would be viewed as...

  • Page 17: Starting Operation Steps

    Starting Operation Steps Pump operation is detailed below. Operation Step Notes Suction valve should be fully open, discharge 1. Verify valve position valve fully closed. If the pump is not full of liquid, fill it according to 2. Check that the pump is filled with liquid. steps 5 &...

  • Page 18: Stopping Operation Steps

    Stopping Operation Steps Operation Step Notes 1. Close discharge valve gradually. Caution! Do not cause sudden closure by using solenoid valve, etc. Pump may be damaged by water hammer. Observe that the motor stops rotating slowly 2. Stop motor. and smoothly. If not, check inside of pump. Points to be observed when stopping: If pump operation is stopped in cold weather, liquid inside the pump cavity may freeze and damage the pump.

  • Page 19: Periodic Inspection

    Periodic Inspection To ensure efficient, smooth operation of the pump, carry out periodic inspection by following the procedure described below. Inspection records should be maintained. When carrying out an overhaul inspection, handle the internal bushings and plastic components most carefully. Since the outer drive magnet and inner magnet capsule are very powerful, handle these components with caution.
  • Page 20 Inspection Part Inspection Points Operator Action Interval # Is there scoring on rear face or # Contact distributor if any cylindrical body? abnormality is observed. # Are there any cracks in the # Contact distributor if any plastic of the rear section or abnormality is observed cylindrical body? # Replace if abnormality is...

  • Page 21: Replacement Tolerance Chart

    Replacement Tolerance Chart Dimensions in inches (mm) Model 401/422/423/425 (N)= New (W) = Worn 0.71 0.75 1.02 1.06 (A) Bushing ID * (18) (19) (26) (27) 0.71 0.67 1.02 0.98 (B) Shaft OD* (18) (17) (26) (25) 0.31 0.24 0.31 0.24 (C) Thickness of outer thrust collar ** 0.33...

  • Page 22: Checking Wear Of Conical Thrust Bushing

    Pumps whose model identification codes have D or E at the end are designed to have contact between the impeller thrust tip and the shaft face in the event of an abnormal operating condition (cavitation, dry operation, etc.). If the surfaces are worn out beyond the wear limit "A", the pump is subject to serious damage.
  • Page 23 • Conical bushing is worn beyond wear limit if: The impeller and inner magnet do not rotate smoothly. Contact between the containment shell and impeller at location A, or contact between the containment shell and the inner magnet bushing at location B, as shown in Figure 10 below, does not allow for the continuous smooth rotation of the impeller and the inner magnet assembly.

  • Page 24: Troubleshooting

    Troubleshooting Symptom on Pump Inspection & Problem Cause Discharge valve Discharge valve Countermeasures closed open Pressure gauge & vacuum Insufficient priming Stop pump, feed priming liquid gauge indicate zero Dry run operation & restart Replace strainer Liquid level drops Foot valve clogged immediately when priming with foreign matter Check whether seat is clogged...
  • Page 25 Symptom on Pump Inspection & Problem Cause Discharge valve Discharge valve Countermeasures closed open Discharge Pressure gauge reads low Pressure & vacuum gauges Rotating direction of Correct motor wiring to reverse quantity is small & vacuum gauge reads indicate low values pump/motor is rotation (clockwise when viewed very low...

  • Page 26: Parts Description And Exploded View

    Parts Description and Exploded View MDF-L 250-401 Models MDF-L 422, 423,425 Models...
  • Page 27 Parts Description Description Description Front casing liner Hex socket bolt M8 x20 Containment shell Hex socket bolt M8 x 15 Impeller Hex socket bolt M6 x 18 Thrust collar, outboard Hex socket set screw M8 x 10 Outer magnet asm Hex bolt Inner magnet asm MDF-L250...

  • Page 28: Disassembly And Assembly Of Pump

    Disassembly and Assembly of Pump Caution! Since the magnets used in the pump are powerful, be careful not to catch your fingers or hand between them during disassembly or assembly. Also, keep the magnet unit away from any electronic device that could be affected by a strong magnetic field. Prior to servicing, the suction and discharge valves must be closed.
  • Page 29 Remove impeller (3) and inner magnet assembly (6) from the containment shell (2) by drawing it forward. Be careful not to scratch the surface of each part. Since the inner magnet assembly is strongly magnetized, store it in a place free of metal pieces.

  • Page 30: Replacement Of Bushing, Outboard Thrust Collar And Shaft

    5 minutes. Then using a hand (arbor) press, remove the bushing (12) by pressing the re- placement jig from the front end of the inner magnet assembly. (Consult Iwaki America for jig specifications). Align the new bushing to the back end of the inner magnet assembly.* Use the replacement...
  • Page 31 Front Casing Liner: FRONT CASING COVER C Remove the drain and vent caps (14). LINER Remove the four hex socket bolts (19). COVER A Remove the two hex socket bolts (18) and separate Cover C (9). * Note: Cover C is divided into two halves.

  • Page 32: Reassembly

    Attach and temporarily secure the two halves of Cover C (9) to Cover A (7) with the hex socket bolts (17). Tap the two parts gently in a slanted direction from the front casing liner suction port. [Fig. 19] Align Covers A, B and C and secure all hex socket bolts tightly. Insert gasket (10) into the vent and drain caps (14) prior to installing them.
  • Page 33 “H” Size Model in (mm) 0.31 (7.8) Figure 20 0.28 (7.1) 422, 423, 425 0.098 (2.5) MDF-L250, 401, 422, 423, 425 models Mount and bolt the frame (15) to the motor. Mount and secure the outer magnet (5) to the motor shaft. [Fig. 20] *Note: Use Loctite 242 (threadlocker) and torque the set screws to 8.7 ft-lbs.

  • Page 34: Spare Parts

    Appropriate spare parts are necessary to ensure continued pump operation. Expendable parts, such as bushings, shaft and outer thrust collar, should always be kept on hand. Consult your distributor or Iwaki America for the correct part number and pricing. When placing orders, supply the following information.

  • Page 35: Dimensions And Weights

    Dimensions and Weights MDF-L250- 425 Dimensions in inches (mm) Model 0.47 [4] (110) (150) (51) (95) (165) (115) (122) (88) (25.4) (25.4) (231) (12) 11.8 (130) (170) (58) (111) (250) (135) (102) (38) (300) 11.5 (293) 0.55 [4] (140) (38) (14) 10.8 (140)
  • Page 36 Iwaki America Corporation 5 Boynton Road Hopping Brook Park Holliston MA 01746-1446 USA TEL: 508-429-1440 FAX: 508-429-1386 Website: www.iwakiwalchem.com...

This manual is also suitable for:

Mdf-l 250Mdf-l 401Mdf-l 422Mdf-l 423Mdf-l 425

Table of Contents