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Johnson Pump MCHC, Instruction Manual

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MCHZ/EN (0912) 4.2

Disassembly and assembly

27

MCHZ

7 Disassembly and assembly

7.1

Special tools

Assembly and disassembly work requires no special tools. However, such tools can 
make certain jobs easier, for instance replacing the shaft seal. If such is the case it will be 
indicated in the text.

7.2

Precautionary measures

Before the pump can be repaired it must first be dismantled. The following measures are 
required for this:

7.2.1

Switch off the power supply

1 Switch off the power supply to the pump by placing the pump switch on the control 

box to the "OFF" position, or if an operating switch is fitted by turning this "OFF".

2 Remove the fuses.

3 Fit a warning board onto the control box.

7.2.2

Pipe support

If the entire pump has to be removed check that the pipes are supported. If this is not the 
case, then ensure sufficient support and fixing points for the pipes first.

7.2.3

Draining the liquid

If the liquid being pumped is hot, then allow the pump to cool down further 
before proceeding. Make sure you do not come into contact with the 
pumped liquid if this is hot or of an unknown composition!

1 Close any relevant stop cocks.

2 Drain the pump until no more liquid flows out.

An MCHZ(S) pump can not be drained fully in the horizontal position. If 
possible place the pump vertically on the bearing cover and allow it to drain 
further.

Summary of Contents for MCHC

Page 1: ...Instruction Manual MCHZ S Horizontal self priming multistage pump Orginal instructions Read and understand this manual prior to operating or servicing this product MCHZ EN 0912 4 2 ...

Page 2: ...bed by the manufacturer and as the case may be after the complete system of which this pump forms part has been made to fulfil the requirements of Directive 98 37 EC as altered most recently Manufacturer s declaration valid until 30 12 2009 Directive 98 37 EC appendix II B Manufacturer SPX Process Equipment NL B V Dr A F Philipsweg 51 P O Box 9 9400 AA Assen The Netherlands hereby declares that th...

Page 3: ... refers may only be put into operation after they have been installed in the way prescribed by the manufacturer and as the case may be after the complete system of which these pumps form part has been made to fulfil the requirements of Directive 2006 42 EC as altered most recently Declaration of incorporation valid from 30 12 2009 Directive 2006 42 EC appendix II B Manufacturer SPX Process Equipme...

Page 4: ...e to or brought to the notice of third parties without our prior written consent SPX Process Equipment NL B V hereafter called Johnson Pump is part of SPX Process Equipment AB The core activities of SPX Process Equipment AB are the development production sale and maintenance of pumps and pump units SPX Process Equipment NL B V P O Box 9 9400 AA Assen The Netherlands Tel 31 0 592 376767 Fax 31 0 59...

Page 5: ...4 MCHZ EN 0912 4 2 ...

Page 6: ...tions 13 2 3 Type code 14 2 4 Serial number 14 2 5 Liquids 15 2 6 Construction 15 2 6 1 Pump section 15 2 6 2 Self priming section 15 2 6 3 Impellers 15 2 6 4 Bearing construction 15 2 6 5 Shaft seal 16 2 7 Application area 16 2 8 Re use 16 2 9 Scrapping 16 3 Installation 17 3 1 Safety 17 3 2 Preservation 17 3 3 Environment 17 3 4 Piping 18 3 5 Accessories 18 3 6 Installation 19 3 6 1 Piping 19 3 ...

Page 7: ...e power supply 27 7 2 2 Pipe support 27 7 2 3 Draining the liquid 27 7 3 Disassembling the MCHZ S 12 5 14a b 16 28 7 3 1 Replacing the stuffing box packing MCHZ 28 7 3 2 Replacing the mechanical seal MCHZS 29 7 3 3 Disassembling the pump 29 7 3 4 Disassembling the bearing housing on the drive side 29 7 3 5 Disassembly of the ball bearing 29 7 3 6 Disassembling the mechanical seal MCHZS 29 7 3 7 Di...

Page 8: ...e mechanical seal MCHZS 41 7 7 3 Disassembling the MCHZ S 41 7 7 4 Disassembling the bearing housing on the drive side 41 7 7 5 Disassembly of the ball bearing 42 7 7 6 Disassembling the mechanical seal MCHZS 42 7 7 7 Disassembling the set of stage casings 42 7 7 8 Disassembling the bearing housing on the suction side 42 7 7 9 Disassembling the ball bearing on the suction side 42 7 7 10 Disassembl...

Page 9: ...3 10 2 Permissible pressure and temperature 74 10 3 Hydraulic performance 75 10 3 1 Performance overview 3000 min 1 75 10 3 2 Performance overview 3600 min 1 76 10 4 Tightening moments for bolts and nuts 77 10 5 Tie rod torque 77 10 6 Post greasing of ball bearings 77 10 7 Recommended locking liquids 77 10 8 Noise data 78 10 8 1 Pump noise as a function of pump power 78 10 8 2 Noise level of entir...

Page 10: ...ithout being obliged to change earlier deliveries accordingly 1 2 Safety This manual contains instructions for working safely with the pump Operators and maintenance staff must be familiar with these instructions Below is a list of the symbols used for those instructions and their meaning Personal danger for the user Strict and prompt observance of the corresponding instruction is imperative Risk ...

Page 11: ...ly carelessly improperly and or negligently The products supplied become defective due to external circumstances beyond our control All parts which are liable to wear are excluded from guarantee Furthermore all deliveries are subject to our General conditions of delivery and payment which will be forwarded to you free of charge on request 1 4 Inspection of delivered items Check the consignment imm...

Page 12: ...being lifted If the electric motor is provided with a lifting eye this lifting eye is intended only for the purpose of carrying out service activities to the electric motor The lifting eye is designed to bear the weight of the electric motor only It is NOT permitted to lift a complete pump unit at the lifting eye of an electric motor 1 5 4 Storage If the pump is not to be used immediately the pump...

Page 13: ... A fax order form is included in this manual You should always state all data stamped on the type plate when ordering parts and in any other correspondence regarding the pump This data is also printed on the label on the front of this manual If you have any questions or require further information with regard to specific subjects then do not hesitate to contact Johnson Pump ...

Page 14: ...foot motor The power is transmitted through a flexible coupling Due to the modular design of the construction parts there is a high level of interchangeability even with other types of multistage pumps such as the MCV or the MCH 2 2 Applications The pump can be used for the following applications warm and hot water supply systems air conditioning cooling for land and marine installations water sup...

Page 15: ...ulti stage Centrifugal Horizontal Z Self priming Shaft sealing stuffing box packing S mechanical seal Impeller diameter 12 5 impeller diameter in cm 14 16 20 Impeller width standard impeller a narrow impeller b wide impeller Number of stages n number of stages n 7 n 1 impellers of which the first has a reduced diameter 70 of full diameter in this example Connections 3 2 diameter suction and pressu...

Page 16: ... The stage casings are fitted with exchangeable wear rings To prevent turbulence and for the benefit of the required NPSH values there is a suction cover with 2 anti rotation partitions located in front of the first impeller 2 6 2 Self priming section The self priming section contains a built in vacuum pump which operates according to the liquid ring principle Air or gas which is sucked in is disc...

Page 17: ... materials and components Also working conditions may cause differences For more detailed information see paragraph 10 2 Permissible pressure and temperature 2 8 Re use The pump may only be used for other applications after prior consultation with Johnson Pump or your supplier Since the lastly pumped medium is not always known the following instructions should be observed Flush the pump properly M...

Page 18: ... men or the environment take appropriate measures to drain the pump safely Possible leakage liquid from the shaft seal should also be discharged safely 3 2 Preservation In order to prevent corrosion the inside of the pump is treated with a preserving agent before leaving the factory Before commissioning the pump remove any preserving agents and flush the pump thoroughly with hot water 3 3 Environm...

Page 19: ...here is a risk that this pressure might be exceeded for instance because of an excessive inlet pressure appropriate measures should be taken by mounting a safety valve in the piping Sudden changes in the rate of flow can lead to high pressure impulses in the pump and the piping water shock Therefore do not use quick acting closing devices valves etc 3 5 Accessories Fit any parts that may have been...

Page 20: ...rs under the pump or under the motor feet 3 Place the pump on the base plate Fix the pump to the base plate 4 Place the electric motor on the base plate Move the motor to obtain a gap of 3 mm between both coupling halves 5 Place copper shims under the feet of the electric motor Fix the electric motor to the base plate 6 Align the coupling in accordance with the following instructions 3 6 4 Alignme...

Page 21: ... to the locally prevailing regulations of the electricity company Refer to the instruction manual belonging to the electric motor If possible mount a working switch as close as possible to the pump Table 1 Alignment tolerances External diameter of coupling mm V Vamax Vamin mm Vrmax mm min mm max mm 81 95 2 4 0 15 0 15 96 110 2 4 0 18 0 18 111 130 2 4 0 21 0 21 131 140 2 4 0 24 0 24 141 160 2 6 0 2...

Page 22: ...the first time and after the pump has been overhauled 1 Fully open the stop valve in the suction pipe Close the delivery stop valve 2 Fill the pump and the suction pipe with the liquid to be pumped 3 Turn the pump shaft a few times by hand and add more liquid if necessary 4 4 Checking the sense of rotation Beware of possible non screened rotating parts when checking the sense of rotation 1 The sen...

Page 23: ...e other a quarter turn 2 Wait 15 minutes after each adjustment before making the next adjustment 3 Continue in this way until an acceptable leakage by drops has been attained 10 20 cm3 h 4 6 2 Mechanical seal A mechanical seal may never show visible leakage 4 7 Pump in operation When the pump is in operation pay attention to the following The pump should never run dry Never use a stop valve in the...

Page 24: ...l seal A mechanical seal generally requires no maintenance however it should never be allowed to run dry If there are no problems do not dismantle the mechanical seal As the seal faces have run in on one another dismantling usually implicates replacement of the mechanical seal If a mechanical seal shows any leakage it has to be replaced 5 3 Environmental influences Regularly clean the filter in th...

Page 25: ...d to each bearing In case the pump is overhauled the bearings and bearing chambers on drive side have to be cleaned and provided with new grease See paragraph 10 6 Post greasing of ball bearings for recommended greases 5 5 Noise If a pump starts making noise this may point to certain problems with the pump unit A crackling noise can indicate cavitation or excessive motor noise can indicate deterio...

Page 26: ...ell as their possible causes are shown in the table below Table 2 Most frequently occurring failures Most common faults Possible causes see Table 3 Pump delivers no liquid 1 2 3 4 5 8 9 10 11 13 14 17 19 20 21 29 Pump has insufficient volume flow 1 2 3 4 5 8 9 10 11 13 14 15 17 19 20 21 28 29 Pump has insufficient head 2 4 5 13 14 17 19 28 29 Pump stops after start up 1 2 3 4 5 8 9 10 11 Pump has ...

Page 27: ... pump unit 23 Pump and motor not well aligned 24 Rotating part running out of true 25 Imbalance in rotating parts for instance impeller or coupling 26 Pump shaft is running out of true 27 Bearings faulty or worn out 28 Casing wear rings faulty or worn out 29 Damaged impeller 30 Shaft on the spot of the stuffing box packing rings or seal faces of the mechanical seal are worn out or damaged 31 Worn ...

Page 28: ...n or if an operating switch is fitted by turning this OFF 2 Remove the fuses 3 Fit a warning board onto the control box 7 2 2 Pipe support If the entire pump has to be removed check that the pipes are supported If this is not the case then ensure sufficient support and fixing points for the pipes first 7 2 3 Draining the liquid If the liquid being pumped is hot then allow the pump to cool down fur...

Page 29: ...k and it can remain on the foundation Proceed as follows this applies for both sides of the pump 1 Remove the gland nuts 0280 and pull the gland 0120 backwards 2 Remove the packing rings 0140 from the stuffing box Use the special packing puller for this see figure 6 3 Clean the stuffing box and then grease it with graphite grease or silicone grease Also grease the new packing rings 4 Bend open the...

Page 30: ... slacken the inner bearing cover 0110 This is now free from the pump shaft 6 Remove the outer external circlip 0220 and the filling ring 0100 from the pump shaft 7 Slacken the bolts 0290 and pull the bearing housing 0010 vertically from the pump section The bearing will be pulled from the pump shaft 8 Remove the lower external circlip 0220 and the filling ring 0100 from the pump shaft 9 Remove the...

Page 31: ... 0090 and any throttling sleeve 0600 from the pump shaft 6 Remove the end cover 0030 and the air wheel 0040 Remove the key 0730 from the shaft 7 Remove the pump cover 0530 and remove the external circlip 0090 8 Remove all impellers 0520 stage casings 0510 and keys 0730 9 Remove the suction cover 0020 from the pump casing 0500 7 3 8 Disassembling the bearing housing on the suction side 1 Position t...

Page 32: ...de of the wear rings must be positioned equally with the flat side of the cover see figure 8 1 Fit the small wear rings 0590 into the covers 0510 2 Fit a wear ring 0580 into the suction cover 0500 3 Fit the wear rings 0580 and 0610 into the covers 0510 4 Fit the wear rings 0610 into the pump cover 0530 7 4 3 Pump assembly 1 Place a little Loctite 641 on the fitting face of the throttling bush 0070...

Page 33: ...ustment screw 0280 see figure 9 For the correct distance see the value mj in the table below 2 Before fitting check whether the grooves for the external circlips 0220 have any sharp edges 3 Wet the clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0140 with a slight twist in clockwise direction onto the shaft Apply pressure or tension during assemb...

Page 34: ...l circlip 0220 into the rear of the 2 grooves on the pump shaft and fit the filling ring 0100 6 Grease the bearing on both sides with ball bearing grease not for 2RS 1 type bearings For the correct type of grease see paragraph 10 6 Post greasing of ball bearings 7 Fit the bearing 0210 over the pump shaft and into the seat of the bearing housing using a suitable assembly bush which rests on both th...

Page 35: ...peat steps 5 and 6 until the last impeller has been fitted 8 Secure the impeller set by fitting an external circlip 0090 to the pump shaft 9 Fit a gasket 0660 and place the suction cover 0500 on the stage set 10 Fit a gasket 0660 to the inlet casing using assembly grease Place the inlet casing 0020 over the shaft end on the stage set 11 Fit the tie rods 0740 with the nuts 0750 For MCHZ S 12 5 x 1 ...

Page 36: ... 90 with regard to each other 6 Press the gland against the last packing ring and tighten the gland nuts one by one by hand 7 5 2 Replacing the mechanical seal MCHZS If only a mechanical seal has to be replaced the pump will have to be disassembled first Then the relevant bearing housing will have to be removed For this see paragraph 7 5 5 and paragraph 7 5 9 Then see paragraph 7 5 6 for disassemb...

Page 37: ...crew the nuts 0750 from the tie rods 0740 4 Remove the pump casing 0030 from the stage set Using a suitable bush press or tap the throttling bush 0060 out of the inlet casing 5 Remove the external circlip 0100 and any throttling sleeve 0600 from the pump shaft 6 Remove the end cover 0040 and the air wheel 0050 Remove the key 0730 from the shaft and remove the gasket 0180 7 Remove the pump cover 05...

Page 38: ...equally with the flat side of the cover see figure 8 Steps 2 and 3 are only applicable for design Q with bronze impellers 1 Fit the small wear rings 0590 into the covers 0510 2 Fit a wear ring 0580 into the suction cover 0500 3 Fit the wear rings 0580 and 0610 into the covers 0510 4 Fit the wear rings 0610 into the pump cover 0530 7 6 3 Pump assembly 1 Place a little Loctite 641 on the fitting fac...

Page 39: ...external circlip groove must be 54 mm 2 Before fitting check whether the grooves for the external circlips 0220 have any sharp edges 3 Wet the clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0160 with a slight twist in clockwise direction onto the shaft Apply pressure or tension during assembly via the rear end of the spring only The sliding surf...

Page 40: ... with ball bearing grease For the correct type of grease see paragraph 10 6 Post greasing of ball bearings Attention Both bearings have to be fitted in X arrangement This means that both bearings have to be turned with the largest diameters facing each other 6 Fit the first of the two bearings 0220 over the pump shaft and into the seat of the bearing housing using a suitable assembly bush which re...

Page 41: ... and place the suction cover 0500 on the stage set 10 Fit a gasket 0660 to the inlet casing using assembly grease Place the inlet casing 0030 over the shaft end on the stage set 11 Fit the tie rods 0740 with the nuts 0750 12 For assembly of the other seal see paragraph 7 6 4 to paragraph 7 6 5 With the exception of the following point The value mj from step 1 of paragraph 7 6 5 now becomes 18 7 7 ...

Page 42: ... with regard to each other 6 Press the gland against the last packing ring and tighten the gland nuts one by one by hand 7 7 2 Replacing the mechanical seal MCHZS If only a mechanical seal has to be replaced the pump will have to be disassembled first Then the relevant bearing housing will have to be removed For this see paragraph 7 3 4 and paragraph 7 3 8 Then see paragraph 7 3 6 for disassembly ...

Page 43: ... rods 0670 and 0680 4 Remove the pump casing 0020 from the stage set Using a suitable bush press or tap the throttling bush 0100 from the pump casing 5 Remove the external circlip 0130 and any throttling sleeve 0110 from the pump shaft 6 Remove the end cover 0060 and remove the air wheel 0070 Remove the key 0660 from the shaft and remove the gasket 0210 7 Remove the pump cover 0050 and remove the ...

Page 44: ...or inserting the wear rings The flat side of the wear rings must be positioned equally with the flat side of the cover see figure 14 1 Fit the small wear rings 0580 into the covers 0510 2 Fit a wear ring 0560 into the suction cover 0500 3 Fit the wear rings 0560 and 0570 into the covers 0510 4 Fit a wear ring 0570 into the pump cover 0050 7 8 3 Pump assembly 1 Place a little Loctite 641 on the fit...

Page 45: ... fingers 1 Fit the set ring 0120 and lock it with the adjustment screw 0400 The distance between the set ring and the nearest external circlip groove must be 64 5 mm 2 Before fitting check whether the grooves for the external circlips 0290 have any sharp edges 3 Wet the clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0230 with a slight twist in c...

Page 46: ...t with the narrow opening pointing to the inside of the pump 5 Fit the external circlip 0290 into the inner of the 2 grooves on the pump shaft and fit the filling ring 0160 6 Fit the bearing 0280 over the pump shaft and into the seat of the bearing housing using a suitable assembly bush which rests on both the inner and outer rings of the bearing 7 Fit the other filling ring 0160 and external circ...

Page 47: ...eller must point up 6 Fit the gasket 0600 and fit a stage casing 0510 on the pressure bracket 7 Repeat steps 5 and 6 until the last impeller has been fitted 8 Secure the impeller set by fitting an external circlip 0130 to the pump shaft 9 Fit a gasket 0600 and place the suction cover 0500 on the stage set 10 Fit a gasket 0600 into the inlet casing using assembly grease Place the pump casing suctio...

Page 48: ...MCHZ EN 0912 4 2 Dimensions 47 MCHZ 8 Dimensions ...

Page 49: ...II drain plug Figure 17 Dimensions sketch MCHZ S 12 5 MCHZ MCHZS da tb ve zb 12 5 x 1 405 507 227 169 12 5 x 2 450 552 272 214 12 5 x 3 495 597 317 259 12 5 x 4 540 642 362 304 12 5 x 5 585 687 407 349 12 5 x 6 630 732 452 394 12 5 x 7 675 777 497 439 12 5 x 8 720 822 542 484 12 5 x 9 765 867 587 529 4516 MCHZS ...

Page 50: ... Figure 18 Dimensions sketch MCHZ S 14a b MCHZ MCHZS da da tb tb ve zb zc zc 14a b x 1 425 527 237 179 202 14a b x 2 475 577 287 229 202 14a b x 3 525 627 337 279 202 14a b x 4 575 677 387 329 202 14a b x 5 625 671 727 773 437 379 202 248 14a b x 6 675 721 777 823 487 429 202 248 14a b x 7 771 873 537 479 248 14a b x 8 821 923 587 529 248 14a b x 9 871 973 637 579 248 4517 MCHZS ...

Page 51: ...lug Figure 19 Dimensions sketch MCHZ S 16 MCHZ MCHZS da tb ve zb 16 x 1 6 5 495 624 267 217 16 x 2 6 5 555 684 327 277 16 x 3 6 5 615 744 387 337 16 x 4 6 5 675 804 447 397 16 x 5 6 5 735 864 507 457 16 x 6 6 5 795 924 567 517 16 x 7 6 5 955 984 627 577 16 x 8 6 5 915 1044 687 637 16 x 9 6 5 975 1104 747 697 4518 MCHZS ...

Page 52: ...CHZ S 20 I leakage water drain II pressure gauge connection III drain plug Figure 20 Dimensions sketch MCHZ S 20a b MCHZ MCHZS da tb ve zb 20a b x 1 600 727 332 282 20a b x 2 675 802 407 357 20a b x 3 750 877 482 432 20a b x 4 825 952 557 507 4519 MCHZS ...

Page 53: ...59 112M 19 6 350 398 135 630 900 50 287 162 0 44 995 259 12 5 x 4 100L 19 6 350 398 135 630 900 50 287 162 0 44 1020 304 112M 19 6 350 398 135 630 900 50 287 162 0 44 1040 304 132S 19 6 350 398 135 630 900 50 307 182 0 44 1111 304 12 5 x 5 112M 19 8 425 473 145 710 1000 63 300 175 0 44 1085 349 132S 19 8 425 473 145 710 1000 63 300 195 0 44 1156 349 12 5 x 6 112M 19 8 425 473 145 710 1000 63 300 1...

Page 54: ...00 63 363 223 0 44 1249 279 14a x 4 132S 19 8 425 473 145 710 1000 63 335 195 0 44 1146 329 160M 19 8 425 473 145 710 1000 63 363 223 0 44 1299 329 14a x 5 132S 19 8 425 473 145 710 1000 63 335 195 0 44 1196 379 132S 19 10 425 475 160 800 1120 70 342 202 0 44 1242 379 160M 19 8 425 473 145 710 1000 63 363 223 0 44 1349 379 160M 24 10 435 495 175 900 1250 70 370 230 0 44 1395 379 14a x 6 160M 24 10...

Page 55: ...14b x 5 160M 19 8 425 473 145 710 1000 63 363 223 0 44 1349 379 160M 24 10 435 495 175 900 1250 70 370 230 0 44 1395 379 160L 24 10 435 495 175 900 1250 70 370 230 0 44 1439 379 14b x 6 160M 24 10 435 495 175 900 1250 70 370 230 0 44 1445 429 160L 24 10 435 495 175 900 1250 70 370 230 0 44 1489 429 180M 24 10 485 545 175 900 1250 80 400 260 0 44 1460 429 180M 24 10 435 495 200 1000 1400 80 400 260...

Page 56: ...426 397 160L 24 10 435 495 175 900 1250 70 390 230 0 40 1470 397 180M 24 10 435 545 175 900 1250 80 400 260 0 40 1487 397 200L 24 10 535 595 200 1000 1400 90 410 290 0 40 1601 397 16 x 5 160L 24 10 435 495 200 1000 1400 80 400 240 0 40 1530 397 180M 24 10 435 495 200 1000 1400 80 400 260 0 40 1547 457 200L 24 10 535 595 200 1000 1400 90 410 290 0 40 1661 457 16 x 6 180M 24 10 435 495 200 1000 1400...

Page 57: ... 282 20a x 2 160L 24 10 435 495 175 900 1250 70 495 270 0 48 1468 357 180M 24 10 485 545 175 900 1250 80 505 280 0 48 1485 357 200L 24 10 535 595 200 1000 1400 90 515 290 0 48 1599 357 20a x 3 200L 24 10 535 595 200 1000 1400 90 515 290 0 48 1674 432 225M 24 10 590 658 240 1120 1600 100 550 325 0 48 1780 432 250M 24 10 720 788 240 1120 1600 130 605 380 0 48 1845 432 20a x 4 200L 24 10 590 658 240 ...

Page 58: ... 282 200L 24 10 535 595 200 1000 1400 90 515 290 0 48 1524 282 20b x 2 200L 24 10 535 595 200 1000 1400 90 515 290 0 48 1599 357 225M 24 10 590 658 240 1120 1600 100 550 325 0 48 1705 357 20b x 3 200L 24 10 535 595 200 1000 1400 90 515 290 0 48 1674 432 225M 24 10 590 658 240 1120 1600 100 550 325 0 48 1780 432 250M 24 10 720 788 240 1120 1600 130 635 410 0 48 1845 432 280S 24 10 720 788 240 1120 ...

Page 59: ...58 Dimensions MCHZ EN 0912 4 2 ...

Page 60: ...mp number The pump number is stated on the label on the cover of this manual and on the type plate of the pump 4 In the event of different electric motor voltage you should state the correct voltage 9 1 2 Recommended spare parts Parts marked with a are recommended spare parts 9 2 Designs The following designs are possible in the parts list below Cast iron Design P cast iron pump casings stage casi...

Page 61: ...60 Parts MCHZ EN 0808 4 1 9 3 MCHZ 12 5 14a b 16 Figure 27 MCHZ 12 5 14a b 16 ...

Page 62: ...brass 0290 8 tap bolt steel 0500 1 suction cover cast iron 0510 n 1 stage casing cast iron 0520 n impeller cast iron bronze 0530 1 pump casing cast iron 0570 1 shaft alloyed steel 0580 n wear ring bronze 0590 n 1 wear ring bronze 0600 1 throttling ring alloyed steel only for MCHZ 12 5 x 8 9 and MCHZ 16 x 5 9 0610 n wear ring bronze 0660 n 3 gasket 0720 1 balance pipe copper only for MCHZ 12 5 x 5 ...

Page 63: ...62 Parts MCHZ EN 0808 4 1 9 4 MCHZS 12 5 14a b 16 Figure 28 MCHZS 12 5 14a b 16 ...

Page 64: ... 2 internal circlip steel 0240 3 V ring rubber 0250 8 plug copper 0260 8 sealing ring copper 0290 8 tap bolt steel 0300 2 adjustment screw alloyed steel 0340 2 pipe union brass 0500 1 suction cover cast iron 0510 n 1 stage casing cast iron 0520 n impeller cast iron bronze 0530 1 pump casing cast iron 0570 1 shaft alloyed steel 0580 n wear ring bronze 0590 n 1 wear ring bronze 0600 1 throttling sle...

Page 65: ...64 Parts MCHZ EN 0808 4 1 9 5 MCHZ 14a b with heavy bearing construction Figure 29 MCHZ 14a b with heavy bearing construction ...

Page 66: ... 1 gasket 0200 1 key alloyed steel 0210 1 ball bearing 0220 2 ball bearing 0230 4 external circlip steel 0240 1 internal circlip steel 0250 3 V ring rubber 0260 4 plug steel 0270 4 wear ring copper 0280 4 stud alloyed steel 0290 4 nut brass 0300 4 tap bolt steel 0310 4 tap bolt steel 0320 2 grease nipple steel 0360 4 stud steel 0500 1 suction cover cast iron 0510 n 1 stage casing cast iron 0520 n ...

Page 67: ...66 Parts MCHZ EN 0808 4 1 9 6 MCHZS 14a b with heavy bearing construction Figure 30 MCHZS 14a b with heavy bearing construction ...

Page 68: ...asket 0150 1 mechanical seal 0160 1 mechanical seal 0170 1 waved ring alloyed steel 0180 1 gasket 0190 2 set ring alloyed steel 0200 1 key alloyed steel 0210 1 ball bearing 0220 2 ball bearing 0230 4 external circlip steel 0240 1 internal circlip steel 0250 3 V ring rubber 0260 8 plug steel 0270 8 wear ring copper 0300 4 tap bolt steel 0310 4 tap bolt steel 0320 2 grease nipple steel 0330 2 adjust...

Page 69: ... 0660 n 3 gasket 0670 1 balance pipe copper 0730 n key alloyed steel 0740 4 tie rod alloyed steel 0750 8 nut steel 0755 4 washer stainless steel Item no Quantity Description Cast iron Cast iron bronze impeller Design P Design Q ...

Page 70: ...MCHZ EN 0808 4 1 Parts 69 MCHZ 9 7 MCHZ 20a b Figure 31 MCHZ 20 a b ...

Page 71: ...90 4 external circlip steel 0300 2 internal circlip steel 0310 3 V ring rubber 0320 4 plug steel 0330 4 wear ring copper 0340 4 stud alloyed steel 0350 4 nut brass 0360 8 tap bolt steel 0420 2 plug steel 0500 1 suction cover cast iron 0510 n 1 stage casing cast iron 0520 n impeller cast iron bronze 0550 1 shaft alloyed steel 0560 n wear ring bronze 0570 n wear ring bronze 0580 n 1 wear ring bronze...

Page 72: ...MCHZ EN 0808 4 1 Parts 71 MCHZ 9 8 MCHZS 20a b Figure 32 MCHZS 20 a b ...

Page 73: ...et 0220 1 mechanical seal 0230 1 mechanical seal 0260 1 key alloyed steel 0270 1 ball bearing 0280 1 ball bearing 0290 4 external circlip steel 0300 2 internal circlip steel 0310 3 V ring rubber 0320 10 plug steel 0330 10 sealing ring copper 0360 8 tap bolt steel 0400 2 adjustment screw alloyed steel 0410 2 pipe union brass 0420 2 plug steel 0500 1 suction cover cast iron 0510 n 1 stage casing cas...

Page 74: ...1 standard bearing construction heavy bearing contruction 12 5 x 1 7 3600 12 5 x 8 9 3000 14a x 1 4 3600 14a x 5 6 3000 3600 14a x 7 8 3600 14a x 9 3000 14b x 1 4 3600 14b x 5 6 3000 3600 14b x 7 8 3600 14b x 9 3000 16 x 1 7 3600 16 x 8 9 3000 20a x 1 3 3600 20a x 4 3000 20b x 1 3 3600 20b x 4 3000 ...

Page 75: ... 20a 20b max capacity m3 h 8 16 26 42 65 100 max head m 275 250 255 350 250 160 max inlet pressure bar 10 max suction head m 8 water of 15 C with air drawn in discharged without back pressure test pressure bar 1 5 x working pressure min test pressure bar 15 max test pressure bar 50 max permitted working pressure bar 40 3x inlet pressure temperature range MCHZS C 20 C to 120 C ...

Page 76: ...MCHZ EN 0912 4 2 Technical data 75 MCHZ 10 3 Hydraulic performance 10 3 1 Performance overview 3000 min 1 Figure 33 Performance overview 3000 min 1 ...

Page 77: ...76 Technical data MCHZ EN 0912 4 2 10 3 2 Performance overview 3600 min 1 Figure 34 Performance overview 3600 min 1 ...

Page 78: ...ue Nm Screwthread Material MCHZ S 12 5 89 118 M16 40CrMo4 MCHZ S 14a b 99 133 M16 MCHZ S 16 200 267 M20 MCHZ S 20a b 137 183 M20 Pump type Bearings Post grease with one of the following types of grease classification acc to NLGI 2 MCH S 14 a b with reinforced bearing suction side bearing BP Energrease LS2 Gulf Crown Grease nr 2 Chevron Polyurea EP Grease 2 Mobil Mobilux EP2 Esso Beacon 2 Shell Alv...

Page 79: ...of pump power kW at 1450 min 1 A sound energy B sound pressure Figure 36 Noise level as function of pump power kW at 2900 min 1 A sound energy B sound pressure 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 0 1 1 10 100 200 P kW dB A A 4103_A B 60 65 70 75 80 85 90 95 100 0 1 1 10 100 300 P kW dB A 4104_A A B ...

Page 80: ...on of the motor 3 Determine the difference between both levels L1 L2 4 Find the differential value on the L1 L2 axis and go up to the curve 5 From the curve go left to the L dB axis and read out the value 6 Add this value to the highest value of both noise levels L1 or L2 Example 1 Pump 75 dB motor 78 dB 2 75 78 3 dB 3 3 dB on the X axis 1 75 dB on the Y axis 4 Highest noise level 1 75 dB 78 1 75 ...

Page 81: ...80 Technical data MCHZ EN 0912 4 2 ...

Page 82: ...l seal 23 stuffing box packing 23 E Earthing 17 Electric motor connection 20 Environment 17 Environmental influences 23 F Faults 24 Foundation 17 G Guarantee 10 H Hoisting 11 I Impellers 15 Inspection motor 21 pump 21 L Lifting eye 11 Liquid drain 27 Liquids 15 Lubrication of the bearings 24 M Maintenance staff 9 Mechanical seal 22 Monitoring 22 N Noise 22 24 O Operational range 75 P Pallets 10 Pi...

Page 83: ...apping 16 Self priming section 15 Sense of rotation 21 Serial number 14 Shaft seal 16 Special tools 27 Start up 22 Static electricity 17 Storage 10 11 Stuffing box packing adjustment 22 T Technicians 9 Temperature 74 Tie rod torque 77 Tightening moments for bolts and nuts 77 Transport 10 Type description 14 V Ventilation 17 W Working switch 20 ...

Page 84: ...der will only be dealt with if this order form has been correctly completed and signed FAX Nr ADDRESS Order date Your order number Pump type Execution Quantity Item No Part Article number pump Delivery address Invoicing address Ordered by Signature Telephone ...

Page 85: ...84 ORDFORM 0804 3 1 EN ...

Page 86: ...r worldwide locations approvals certifications and local representatives please visit www johnson pump com www spxpe com SPX Corporation reserves the right to incorporate our latest design and material changes without notice or obligation Design features materials of construction and dimensional data as described in this bulletin are provided for your information only and should not be relied upon...

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