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Dover PSG Mouvex P BA Series, Installation - Use - Maintenance

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Dover PSG Mouvex P BA Series Installation - Use - Maintenance Download Page 42

9.3.1 Operation of a single mechanical shaft seal

The shaft 

501

drives the rotating part 

697

by means of

set screws 

617

. The counterpart 

604

is integrated with

the shaft seal holder 

601

by the seal 

605

and the pin 

627

.

THE SEALING IS ACHIEVED :

• On the shaft, by ring seals 

613

of rotating part 

697

.

• By the contact face between the rotating part 

697

and

the fixed counterpart 

604

.

• Between the fixed counterpart 

604

and the shaft seal

holder 

601

by the seal 

605

.

Fluid tightness therefore depends on the condition of the
friction faces and ring seals.

REASONS FOR LEAKING SHAFT SEAL :

• Seal damaged during assembly (scratching on friction

faces, etc.).

• Shaft seal unsuitable for the liquid pumped (chemical

attack or mechanical damages to seals and counter-
parts).

• Normal wear of the shaft seal.

9.3.2 Replacing a single mechanical shaft seal

Before undertaking disassembly, make sure that the pump
has been drained, and take the necessary precautions
to prevent it from starting up. The pump must not start up,
even accidentally.

Uncouple the pump by removing the coupling sleeve.

Remove the pump mounting screws.

Place it on a bench or a flat surface free from obstructions.

Dismantling :

• Remove the shaft key 

508

.

• Carefully clean the end of the shaft with emery paper

no. 320 to remove any traces of paint, oxidation, burrs, etc.

• Unscrew the 4 screws 

723

.

• Remove the cover, 

705

without damaging the seal 

707

.

• Remove the circlips 

537

.

• Remove the washer 

731

.

• Using the bearing puller, remove the bearing 

703

:

position the claws behind the bearing, sliding them into
the openings in the housing 

725

and pressing against

the shaft end 

501

.

• Remove the second washer 

731

.

• Unscrew the 3 screws 

726

(4 screws in the case of jac-

ket versions 

P40 - P60 - P100).

• Slide the strainer assembly 

725

along the shaft 

501

taking care not to damage the lip seal 

716

or the fixed

counterpart 

604

(for jacket versions P40 - P60 - P100,

the shaft seal holder 

601 

is connected directly to the

front cover 

401a.

The strainer 

725

should be removed

with just its seals).

• Unscrew the 2 screws 

729

and their square nuts 

730

.

• Remove the shaft seal holder 

601

.

• Remove the counterpart 

604

and its ring seal 

605

remaining on the shaft seal holder 

601

.

• Undo the screws 

607 

on the shaft keeping the rotating

part in place 

697

(for jacket version P40 - P60 - P100 :

unscrew the plug 

651

on the cover 

401a

to get access

to the screw 

617

, turn the shaft 

501

slowly to align them).

• Remove the rotating part

697

by sliding it along the

shaft 

501

(for jacket version P40 - P60 - P100 : remove

the jacket unit

622 

and rotating part 

697

by sliding

them along the shaft 

501

).

42/53

NT 1008-C00 07 18 P BA series  e

9. SHAFT SEAL (continued)

Summary of Contents for PSG Mouvex P BA Series

Page 1: ...or Z I La Plaine des Isles F 89000 AUXERRE FRANCE Tel 33 0 3 86 49 86 30 Fax 33 0 3 86 49 87 17 contact mouvex com www mouvex com WARRANTY P Series pumps are covered 24 months by warranty within the limits mentioned in our General Sales Conditions In case of a use other than that mentioned in the Instructions manual and without preliminary agreement of MOUVEX warranty will be canceled ...

Page 2: ...e flow 34 8 6 Energy consumption 34 8 7 Replacing the spring 34 9 SHAFT SEAL 35 9 1 Packing 35 9 2 MOUVEX mechanical shaft seal 37 9 3 Single mechanical shaft seal 40 9 4 Remounting a single mechanical shaft seal with grease container 44 9 5 Double mechanical shaft seal 45 10 MAINTENANCE 49 10 1 Lubrication of the bearing 49 10 2 Checking the vanes and the pushrods 49 10 3 Checking the condition o...

Page 3: ...Pump plate PA ATEX plate 4 holes Ø 18 at 90 on Ø 145 4 holes Ø 14 Suction Discharge 4 holes Ø 18 at 90 on Ø 145 P15 P25 BA Single bypass P15 P25 BA Stirrup AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate PA ATEX plate S Inserting M6 sensor Thread size 8 mm max Ø 122 Ø 185 18 Ø 122 Ø 185 18 ...

Page 4: ...Ø 18 at 90 on Ø 145 4 holes Ø 14 Discharge Suction Weight 46 kg AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover K Reheating jacket port P Pump plate PA ATEX plate S Inserting M6 sensor Thread size 8 mm max 4 holes Ø 18 at 90 on Ø 145 4 holes Ø 14 Weight 51 kg P15 P25 BA Jacket Single bypass P15 P25 BA Double bypass Ø 122 Ø 185 18 Ø 122 Ø 185 18 2 se...

Page 5: ...tment J Space required for removing front cover K Reheating jacket port P Pump plate PA ATEX plate S Inserting M6 sensor thread size 8 mm max J Space required for removing front cover P Pump plate PA ATEX plate 4 holes Ø 14 Weight 58 kg 4 holes Ø 18 at 90 on Ø 145 P40 BA Stirrup P15 P25 BA Jacket Double bypass Ø 122 Ø 185 18 Ø 200 Ø 138 22 2 sensors on double bypass 1 on each plug ...

Page 6: ... 4 holes Ø 14 Suction 4 holes Ø 14 8 holes Ø 18 at Ø 45 on Ø 160 Weight 64 kg Discharge 8 holes Ø 18 at 45 on Ø 160 Discharge Weight 72 kg Suction P40 BA Double bypass P40 BA Single bypass AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate PA ATEX plate S Inserting M6 sensor thread size 8 mm max Ø 200 Ø 138 22 Ø 200 Ø 138 22 2 sensors on d...

Page 7: ...8 at 45 on Ø 160 for CB ISO PN16 DN80 4 holes Ø 14 View A K Reheating jacket port V Draining the jacket AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate Weight 66 kg Weight 69 kg Ø 200 Ø 138 22 P40 BA Jacket Single bypass P40 BA Jacket Stirrup 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 Pump shaft Vi...

Page 8: ... 70 kg AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate K Reheating jacket port V Draining the jacket Weight 74 kg Ø 220 Ø 158 22 P60 BA Stirrup P40 BA Jacket Double bypass View A Pump shaft 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 8 holes Ø 18 at 45 on Ø 160 for CB ISO PN16 DN80 4 holes Ø 14 ...

Page 9: ...x 4 holes Ø 14 8 holes Ø 18 at 45 on Ø 180 Discharge Suction Weight 75 kg 8 holes Ø 18 at 45 on Ø 180 Suction Discharge Weight 80 kg 4 holes Ø 14 AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate PA ATEX plate S Inserting M6 sensor Thread size 8 mm max Ø 220 Ø 158 22 Ø 220 Ø 158 22 P60 BA Double bypass P60 BA Single bypass 2 sensors on do...

Page 10: ...t J Space required for removing front cover P Pump plate 4 holes Ø 14 8 holes Ø 18 at 45 on Ø 180 for CB ISO PN16 DN100 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 8 holes Ø 18 at 45 on Ø 180 for CB ISO PN16 DN100 4 holes Ø 14 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 Pump shaft View B 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 Pump shaft View B 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 Weight 77 kg Ø 22...

Page 11: ... adjustment J Space required for removing front cover P Pump plate K Reheating jacket port V Draining the jacket 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 8 holes Ø 18 at 45 on Ø 180 for CB ISO PN16 DN100 4 holes Ø 14 Pump shaft View B 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 8 holes Ø 18 at 45 on Ø 210 Weight 83 kg Ø 158 Ø 220 22 Ø 250 Ø 188 24 P60 BA Jacket Double bypass 4 holes Ø 18 Discharge Su...

Page 12: ... Thread size 8 mm max 4 holes Ø 18 8 holes Ø 18 at 45 on Ø 210 Weight 175 kg Weight 195 kg Discharge Suction 24 Ø 188 Ø 250 8 holes Ø 18 at 45 on Ø 210 P100 BA Double bypass P100 BA Single bypass Discharge Suction 24 Ø 188 Ø 250 4 holes Ø 18 AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover P Pump plate PA ATEX plate S Inserting M6 sensor Thread size ...

Page 13: ...holes Ø 18 Weight 126 kg Weight 138 kg Ø 250 Ø 188 Ø 250 Ø 188 8 holes Ø 18 at 45 on Ø 210 for CB ISO PN16 DN125 8 holes Ø 18 at 45 on Ø 210 for CB ISO PN16 DN125 24 24 K Reheating jacket port V Draining the jacket J Space required for removing front cover P Pump plate AJ Space required for removing cap F Bypass adjustment J Space required for removing front cover K Reheating jacket port P Pump pl...

Page 14: ...Space required for removing front cover K Reheating jacket port P Pump plate V Draining the jacket Pump shaft View B 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 4 M12 at 90 on Ø 65 for CB ISO PN16 DN15 4 holes Ø 18 Weight 149 kg Ø 188 8 holes Ø 18 at 45 on Ø 210 for CB ISO PN16 DN125 24 P100 BA Jacket Double bypass Ø 250 ...

Page 15: ... cir cuit should always be determined so as to reduce the height and length of the piping as much as possible Wherever possible siphons and reverse slopes should be avoided in the inlet piping Particular care needs to be taken with the sealing on the inlet side to prevent air entering Pipe elbows must always have a large radius more than 3 times the diameter of the pipes and must not be mounted to...

Page 16: ... in one operating direction This is to say that its orientation is a function of the ope rating direction of the pump see BYPASS It is also possible to order the following options Bypass clamp the pump then has no other integrated safety device In that case it is strongly recommended to install a pressure switch to limit any overpressure Double bypass Here the pump is fitted with an inte grated sa...

Page 17: ...l be on the lower opening P15 P25 P40 P60 P100 If using liquid the inlet will be on the lower opening and outlet will be on the upper opening P15 P25 P40 P60 P100 Draining the product when hot could cause serious injuries or damage 2 9 Heat insulation Take care of keeping outboard bearing holder and bea ring outside insulation to ensure sufficient bearing cooling Coupling guard For any application...

Page 18: ...eduction gearbox pump shafts The motor and pump shafts are accurately aligned at the factory before dispatch but they should be checked carefully when received at the site and realigned if necessary To align the coupling and the shaft use a straight edge to check the concentricity and thickness gauges for the angular misalignment The 3 figures below show the procedure in detail and the admissible ...

Page 19: ...d with the motor 2 13 Diesel engines drive Do not forget that these engines are not reversible It is therefore vital to carefully check the inlet and outlet sides of the pump before connecting the pump unit to the piping The use of diesel engines drive is now well known Nevertheless we strongly recommend that you carefully read the technical manuals concerning them WARNING DISCONNECT THE ELECTRICI...

Page 20: ...hed for the MOUVEX P BA series pump in good conditions without the drive is less than P15 P25 74 dB A P40 P60 76 dB A P100 78 dB A 3 4 Starting up the pump Before starting the pump make sure that the following conditions are met The circuit should be in one of its pumping configu rations with the appropriate valves open especially on the intake side For products requiring heating they must be brou...

Page 21: ...ther This protection should also prevent condensation It is recommended to turn the pump by hand every two months to distribute the lubricant around the interior Items should then be placed where there is no risk of damage if they are moved slightly by vibrations 3 7 3 Restarting Follow the standard start up procedure for the pump motor driven pump as well as the instructions below Turn the pump b...

Page 22: ... cleaned up WARNING BE CAREFUL WITH THE WEIGHT OF THE PARTS WHEN THEY ARE BEING REMOVED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe damage WARNING TAKE ALL NECESSARY MEASURES TO RENDER ANY START UP EVEN AC...

Page 23: ...king sure it is fitted in the right direction see details below and making sure it slides properly in its slot By hand turn the pump shaft to bring the next vane into a horizontal plane Then proceed in the same way for each vane 5 3 Changing the bushing Dismantling Place the front cover 401b vertically on side jacket Insert the extractor inside the ring 407 as far as the front cover 401b When the ...

Page 24: ...ce if necessary Place the front cover 401b on the shaft 501 and tighten it as much as possible by hand Tighten the 6 screws 410 Turn the shaft as you tighten the screws 410 24 53 NT 1008 C00 07 18 P BA series e 5 OPENING AND CLOSING THE NON DRIVE SIDE BASE continued ...

Page 25: ...S INJURY ANY SPILLS MUST BE CLEANED UP Slippery lubricant Spills should be cleaned up WARNING BE CAREFUL WITH THE WEIGHT OF THE PARTS WHEN THEY ARE BEING REMOVED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe...

Page 26: ... by means of suitable straps elastic bracelets Check the seal 403 6 2 Dismantling the vanes and pushrods Place the front cover 401a and rotor 301 assembly on a bench Remove the straps and the vanes 317 Pull out the pushrods 318 by pushing them if necessary with a screwdriver Check the pushrods 318 for wear see MAINTENANCE and change them as necessary Pull out the rotor 301 Remove the keyways 536 C...

Page 27: ...e in line with that of the front cover 401a Fit the front cover 401a on the strainer 725 If there is a double shaft seal index the seal insert and the cover Tighten the 3 screws 726 6 4 Reassembly the vanes and pushrods 6 4 1 Shaft with 2 key grooves Position the shaft 501 vertically with the front cover 401a facing down Check the seal 403 and replace if necessary Fit the seal 403 in the front cov...

Page 28: ... the vane as seen by the observer fitting direction here is counterclockwise Pump WITHOUT pushrods Put the keys 536 n the grooves WITHOUT circular marks Put rotor 301 on shaft 501 Rotor will thus be orien tated to close pushrods holes Pump with 12 vanes rotor Pump with 6 vanes rotor In the case of a rotor with 6 vanes make sure the rotor is facing the right direction The rule for correct orienta t...

Page 29: ...is assembly into the body 101 removing the straps at an opportune moment 6 5 Closing the drive side base Refit the front cover 401a on the pump body 101 Screw the 6 screws 410 Check that the pump rotates freely when turned by hand Replace the pump mounting screws Couple the pump by placing the coupling sleeve Check the pump alignment see ALIGNMENT OF MOTOR PUMP AND REDUCTION GEARBOX PUMP SHAFTS Ro...

Page 30: ... ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe damage WARNING TAKE ALL NECESSARY MEASURES TO RENDER ANY START UP EVEN ACCIDENTAL OF THE PUMP DURING THE WORK IMPOSSIBLE Any unforeseen start up can cause serious injuries...

Page 31: ...731 is pressed against the shoulder of the shaft 501 Couple the balls bearing 703 on to the shaft by hand see GREASING OF THE BALL BEARING Push it on with a sleeve until it comes to bear against the washer 731 In no case must the balls bearing be pushed on to the shaft without support for the shaft 501 FAILURE TO FOLLOW THIS PROCEDURE CAN SERIOUS LY DAMAGE THE INTERIOR OF THE PUMP Place a second w...

Page 32: ...OVED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe damage WARNING TAKE ALL NECESSARY MEASURES TO RENDER ANY START UP EVEN ACCIDENTAL OF THE PUMP DURING THE WORK IMPOSSIBLE Any unforeseen start up can cause s...

Page 33: ... only protects the pump in one direc tion of operation Consequently it is necessary to check that the pump s direction of operation is correct by veri fying that the cap 827 is located on the inlet side The bypass must be reversed if in the wrong direction 8 3 Bypass inversion Loosen the 2 screws 859 Remove the bypass Check the seals 858 and change them as necessary Turn the bypass through 180 Scr...

Page 34: ...cessary precautions to prevent it from starting up The pump must not start up even accidentally Disassembly Loosen the 2 screws 859 Lift off the bypass and place it on a bench or flat surface free from obstructions Set the bypass pressure to the minimum see BYPASS ADJUSTMENT Keep the bypass vertical during the rest of the process Slowly loosen the screws 856 THE SPRING IS ALWAYS UNDER SLIGHT TENSI...

Page 35: ...t the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe damage WARNING TAKE ALL NECESSARY MEASURES TO RENDER ANY START UP EVEN ACCIDENTAL OF THE PUMP DURING THE WORK IMPOSSIBLE Any unforeseen start up can cause serious injuries o...

Page 36: ...ing gland 631 by sliding it along the shaft 501 Carefully lift out the worn shaft seal Reassembly Cut 5 rings with the diameter of the shaft from the replacement packing Insert them in the strainer 725 one after the other arranging them in such a way that the joints in the rings 629 do not merge into one another The last ring must not protrude from the strainer Put back the packing gland 631 Reins...

Page 37: ...VED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEVERE DAMAGE Excessive temperature can cause injury or severe damage WARNING TAKE ALL NECESSARY MEASURES TO RENDER ANY START UP EVEN ACCIDENTAL OF THE PUMP DURING THE WORK IMPOSSIBLE Any unforeseen start up can cause se...

Page 38: ...ns to prevent it from starting up The pump must not start up even accidentally Uncouple the pump by removing the coupling sleeve Remove the pump mounting screws Place it on a workbench or on a flat surface free from obs tructions Dismantling Remove the shaft key 508 Carefully clean the end of the shaft with emery paper no 320 to remove all traces of paint oxidation burrs etc Unscrew the 4 screws 7...

Page 39: ...01 until it comes to abut the front cover 401a be careful with the friction face of the counterpart 604 of the shaft seal and the lip seal 716 Screw the 3 screws 726 Position the washer 731 against the shoulder of the shaft 501 Fit the bearing 703 on the shaft by hand Push it on with a sleeve until it comes to bear against the washer 731 Under no circumstances should you push the bearing onto the ...

Page 40: ...N THE PUMP LUBRICANT IS VERY SLIPPE RY AND MAY CAUSE SERIOUS INJURY ANY SPILLS MUST BE CLEANED UP Slippery lubricant Spills should be cleaned up WARNING BE CAREFUL WITH THE WEIGHT OF THE PARTS WHEN THEY ARE BEING REMOVED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEMPERATURE LIABLE TO CAUSE INJURY OR SEV...

Page 41: ... with Loctite 243 Demounting port details Plug 651 seal with Loctite 5331 or equivalent STANDARD P15 P25 P40 P60 P100 JACKET P15 P25 JACKET P40 P60 P100 9 3 Single mechanical shaft seal View F Loctite is a registered brand Slope of stan dard thread lock Loctite 243 F ...

Page 42: ...nd of the shaft with emery paper no 320 to remove any traces of paint oxidation burrs etc Unscrew the 4 screws 723 Remove the cover 705 without damaging the seal 707 Remove the circlips 537 Remove the washer 731 Using the bearing puller remove the bearing 703 position the claws behind the bearing sliding them into the openings in the housing 725 and pressing against the shaft end 501 Remove the se...

Page 43: ...over 401a and turning the shaft 501 for jacket versions P40 P60 P100 Insert the shaft seal holder assembly 601 and the counterpart 604 into the strainer 725 be careful not to bump the edge of the shaft seal counterpart 604 Tighten the 2 screws 729 and nuts 730 on the strainer 725 Slide the strainer assembly 725 onto the shaft 501 until it reaches the front cover 401a be careful with the fric tion ...

Page 44: ...the screws 729 and nuts slightly 730 Follow step 12 in REPLACING A SINGLE MECHANICAL SHAFT SEAL Reassembly then Fit the lubricator 644 and breather 643 Unscrew the 2 screws 729 and push the cover 645 out ward Using a grease gun fill the interior of the shaft seal hol der 601 and the cover 645 with grease driving out as much air as possible then tighten the 2 screws 729 Use the lubricator to fill t...

Page 45: ...sonal injury or property damage CAUTION THE PUMP LUBRICANT IS VERY SLIPPE RY AND MAY CAUSE SERIOUS INJURY ANY SPILLS MUST BE CLEANED UP Slippery lubricant Spills should be cleaned up WARNING BE CAREFUL WITH THE WEIGHT OF THE PARTS WHEN THEY ARE BEING REMOVED The weight ot the parts can be dangerous and may provoke bodily injuries or material damages CAUTION THE SURFACES OF THE PUMP CAN BE AT A TEM...

Page 46: ...ouble mechanical shaft seal STANDARD P15 P25 P40 P60 P100 JACKET P15 P25 JACKET P40 P60 P100 Loctite is a registered brand G1 4 cleaning port View F Slope of standard thread lock Loctite 243 Demounting port details Flushing product exit Seal with Loctite 5331 or equivalent Flushing product entry ...

Page 47: ... pump has been drained and take the necessary precautions to prevent it from starting up The pump must not start up even accidentally Uncouple the pump by removing the coupling sleeve Remove the pump mounting screws Place it on a workbench or on a flat surface free from obs tructions Dismantling Remove the shaft key 508 Carefully clean the end of the shaft with emery paper no 320 to remove any tra...

Page 48: ... counterpart Insert the shaft seal holder 601 and seal 602 in the strainer 725 be careful not to bump the edge of the counterpart 604 of the shaft seal Tighten the 2 screws 729 and their nuts 730 Slide the strainer 725 onto the shaft 501 until it contacts the front cover 401a Tighten the 3 screws 726 Position the washer 731 against the shoulder of the shaft 501 Fit the bearing 703 on the shaft by ...

Page 49: ...ise checking the condition of the friction bushings at the same intervals as the vanes and pushrods Replacement of the bushings should be scheduled if a bushing shows large scratches or if it is more than 1 mm out of oval Bushings 10 4 Packing Packings should be replaced when the adjustment screws are at the end of their thread see PACKING 10 5 Mechanical seal Mechanical shaft seals should be repl...

Page 50: ... screw or replace the spring after checking that the electric motor is suitably protected 2 1 2 The bypass valve is not closed check whether the seat is contaminated 2 1 3 The pump is worn this will also affect the suction capacity of the pump cf 3 2 2 c 2 2 If the pressure complies with the equipment data pump speed and motor output it is possible that 2 2 1 The pressure required for the given in...

Page 51: ...he cause a air must be entering upstream of the pump isolating valve b the vapor tension of the liquid is to high or has become so as a result of a change in temperature cf 3 1 3 3 2 2 If the vacuum is low or zero this may be because a the bypass valve is not closing properly due to dirt on the valve seat b air is entering the pump check the front cover seals flanges etc c the pump is worn and the...

Page 52: ...ably protected 8 2 abnormal stress on the pump the transmission is pulling on the shaft pulling on the flanges by the piping 8 3 broken material or a foreign body in the pump EXCESS POWER CONSUMPTION 9 The most spectacular event occurs when a heat motor stalls or the power to an electric motor is shut off 9 1 If this incident occurs when closing the discharge line the cause may be a bypass fitted ...

Page 53: ...en bezogen auf mechanische und elektrische Risiken die für rotierende Maschinen gelten NF EN 809 2009 NF EN 1672 2 2009 NF EN ISO 13857 2008 NF EN 12162 2009 ATEX Richtlinie 2014 34 EU 26 Feb 2014 wie umgesetzt im nationalen Recht in Bezug auf Ausrüstungen für den Einsatz in explosionsgefährdeter Atmosphäre Die Konformität hat Geltung durch Anwendung folgender Normen NF EN 1127 1 1997 NF EN 13463 ...

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