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Installation, Operation and Maintenance manual

22

DFPRE Large Dust Collectors

Routine inspection

To maintain the optimum performance of the dust collector, a routine inspection should 

be made to minimise down-time in the event of equipment malfunction, particularly 

on continuous performance applications and to ensure the equipment is maintained 

to its original supply condition.
Any abnormal change in differential pressure across the filter cartridges indicates a 

change in operating conditions and a fault to be rectified. For example, a prolonged 

stoppage of compressed air will cause an excessive build-up of dust on the cartridges, 

resulting in a greatly increased pressure drop.
After the fault has been rectified, resumption of compressed air cleaning will usually 

return the filter to normal efficiency. However, it is advis able to operate the in still-air 

conditions for a short period to dislodge any accumulated dust before putting the 

collector into operation.
Filter resistance can be checked by viewing the display on the front panel of the 

controller. This will give a continuous indication of the state of the filter. Once running, 

the operating resistance will be relatively stable, the actual value depending on the 

air volume and the characteristics of the dust being handled.

  If the differential pressure exceeds 120 mm WG, check the following:

• 

The compressed air supply is installed correctly, is free of water or oil and 

is maintained at the recommended pressure (refer to Table 3).

• 

The differential pressure connections are not blocked.

• 

The solenoid and diaphragm valves are functioning correctly.

• 

The controller is operational.

• 

The dust container is properly sealed.

 

If the differential pressure still exceeds 120 mm WG after checking the above, 

then reduce the pulse cleaning interval time to see if this will improve the 

cleaning of the filter cartridges and, in turn, lower the differential pressure 

(details of pulse interval settings are provided in the controller manual).

 

If the differential pressure exceeds 150 mm WG, then the cartridges have 

reached the end of their lifetime and need replacing.

  Ignition minimising fans are fitted with a lining inside the casing. As this may 

only offer protection for a limited period, if there is any upset condition leading 

to rubbing, then the fan must be switched off immediately and the condition 

corrected.

  It is recommended to periodically inspect the general casing integrity.

  Do not operate above recommended compressed air pressure. Excessive 

pressure will reduce the working life of components.

Servicing schedule

A record of all pressure checks should be kept in a log book to aid the speedy diagnosis 

of faulty operation.

Daily

1.  Check level of contents in dust container and cyclopeel if applicable, and empty 

if ¾ full.

Summary of Contents for DFPRE 12L

Page 1: ...DFPRE Dust Collectors Series DFPRE Large 4L 6L 9L 12L INSTALLATION OPERATION AND MAINTENANCE MANUAL Publication DOCAM1216501 REV 01 GB 1121 MASTER LANGUAGE ENGLISH...

Page 2: ...tional fan box assembly 12 Dust container assemblies 13 Compressed air requirements 15 Controller 15 Overload protection 16 Installation check list 16 COMMISSIONING 16 Commissioning check list 16 Star...

Page 3: ...chor 11 Figure 6 Removal lifting profiles 11 Figure 7 Cyclopeel spark trap assembly 12 Figure 8 Fan box assembly 13 Figure 9 Dust container assembly 13 Figure 10 Big bag 14 Figure 11 Big bag hook 14 F...

Page 4: ...t collector as when combined they can create a violent thermite reaction that would ignite a fire and or explosion 4 Applications having a risk of sparks and fires Where sparks are generated by the pr...

Page 5: ...ource Lifting and erection Electrical installation inspection and maintenance work Pneumatic installation inspection and maintenance work Any access to internal classified potentially explosive atmosp...

Page 6: ...should comply with a category according to EN 60079 0 The DFPRE dust collector is designed for handling non explosive dusts Where applicable equipment connected to the dust collector for example a cy...

Page 7: ...ectors 200 L dust drum Clean air plenum access door Fan box Slide gate handle Lifting lugs for fan box Lifting bracket for unit Dirty air plenum access door Dirty air inlet Hopper Earthing point Power...

Page 8: ...ng a back draft damper on outlet in order to prevent dust migration during offline cleaning Required tools and equipment Crane fork lift Slings clevis pins and adequate lifting equipment Standard tool...

Page 9: ...e to lifting The collector should be lifted using either the four point lifting arrangement or the fork lifting arrangement by a qualified competent person refer to figures 2 and 3 During all lifting...

Page 10: ...Installation Operation and Maintenance manual 10 DFPRE Large Dust Collectors 90 1 2 m Figure 2 Four point lifting arrangement Figure 3 Fork lifting arrangement Figure 4 Lifting...

Page 11: ...fan box consider Anchor the dust collector to the foundations Anchor should project a minimum of 45 mm and account for nut washer base plate and shims grout Provisional anchor bolt recommendations 4 C...

Page 12: ...ea 1 are fastened from inside the clean air chamber The bolts in area 2 are fastened from inside the contaminated air chamber The bolts in area 3 are fastened from inside the contaminated air chamber...

Page 13: ...along eacht side of the bolt pattern 2 Bolt dust container to the hopper flange Keep your toes and feet away from pinch points giving your full attention while assembling dust disposal system The dust...

Page 14: ...ian hopper transition piece bolt washer nut rotary airlock Big bag Figure 10 Big bag When using big bag hook A sealant must be fitted between all connecting flanges Circular or square shaped Big bag s...

Page 15: ...ssor and dust collector should be long enough to act as a cooling device for the compressed air A typical requirement for the smaller installation would be 10 m 30ft of 12 mm NB piping For further det...

Page 16: ...Regulations 2008 to provide adequate isolation and emergency stop facilities Due to the varied nature of site installations this cannot be provided by Donaldson but instead is the responsibility of th...

Page 17: ...nameplate To reverse rotation three phase power supply Turn electrical power OFF at source and switch any two phase wires on either the motor junction box or the controller input terminals Ensure acc...

Page 18: ...lter cartridges casing and discharge hopper To achieve this equipment should be shut down in the following order 1 Stop fan only leaving controller and compressed air supply switched on to allow filte...

Page 19: ...s remove the fine particulate and clean filtered air passes through the cartridge to the clean air chamber and discharges through the clean air outlet At regular intervals governed by the controller e...

Page 20: ...e container by lowering the handle 2 Remove and empty the container 3 Replace container by sliding it back into position 4 Reseal the container by raising the handle Hook on dust bin collector hopper...

Page 21: ...ompetent personnel These risks include inhalation of dust and potential explosion hazards Appropriate personal protection equipment PPE should be used e g dust mask safety hat gloves etc In order to m...

Page 22: ...ed If the differential pressure exceeds 120 mm WG check the following The compressed air supply is installed correctly is free of water or oil and is maintained at the recommended pressure refer to Ta...

Page 23: ...eassembly It may be necessary to check operation of the valves while the system is pressurized Care should be taken to avoid injury Every 2 months 1 Check connected ducting Repair any leaks as necessa...

Page 24: ...of significant dust emission i e due to damaged filter media or seal etc The fan should be inspected immediately if there is any unexpected noise temperature or vibration The fan should be inspected e...

Page 25: ...ng screwdriver unscrew 4 screws to remove bonnet from valve 4 Diaphragm assembly is now accessible for cleaning or replacement When replacing diaphragm assembly ensure the marking THIS SIDE OUT faces...

Page 26: ...Filter cartridges cannot be washed and re used Do not drop cartridges Refer also to figure 10 1 Turn off power to the collector and compressed air 2 Open Dirty Air Plenum access doors by removing the...

Page 27: ...er is seated and sealed properly Seal must be compressed to ensure it is airtight Damaged seals must be replaced 10 Continue by replacing the remaining filter cartridges in the top row Proceed to repl...

Page 28: ...door Cartridge cover Cartridge Wing nut Washer Figure 18 Cartridge replacement HEPA filter replacement 1 Remove the HEPA filter by unclamping the outlet grid panel at the side top 2 Install the new HE...

Page 29: ...s and components made of plastic or non metal must be removed and disposed of separately Electrical components switches power supplies boards etc must be removed in order to be reused if they are stil...

Page 30: ...transpose if necessary Airflow damper incorrectly adjusted Check airflow in duct Adjust damper control until correct airflow is achieved Access panels open or incorrectly secured Check all access pan...

Page 31: ...nd clear Visible effluent in clean air outlet Filter cartridges not properly sealed Check cartridge access covers are seated and seal properly Damaged filter cartridge Damaged cartridges can be identi...

Page 32: ...RE 6L 63 bar liters DFPRE 9L 91 bar liters DFPRE 12L 91 bar liters Material used for manifold construction Structural hollow section according to EN13445 1 bar 105 Pa TABLE 3 COMPRESSED AIR REQUIREMEN...

Page 33: ...Hz IEC 60034 30 kW Nameplate details Range 0 75 3 0 230 3 50 D 220 240 D 400 3 50 Y 380 420 Y 4 0 and above 400 3 50 D 380 420 D 690 3 50 Y 660 690 Y 3 Phase 60 Hz kW Nameplate details Range 0 75 3 0...

Page 34: ...16 436 Ultra Web Stainless Steel DFE ULTRA WEB SS CARTRIDGE 349 MM X 349 MM OD X 660 MM L 13 74 X 13 74 OD X 26 L P034305 016 436 Fibra Web DFE FIBRA WEB CARTRIDGE 349 MM X 349 MM OD X 660 MM L 13 74...

Page 35: ...consult Donaldson Access door assembly Gasket Prik 5004 GASKET PRIK 5004 EPDM SHEET THICKNESS 1 MM TO 3 5 MM 10 M PACK 2622569X 000 440 Gasket 10 x 5 mm Neoprene 07011636 Dust container assembly Poly...

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