Bowker Machinery Ltd Information Booklet for Cartridge Filter Type Spray Booths Suitable for Powder Paint Application Revision 2 February 2018 Bowker Machinery Ltd Unit 29 Dinting Vale Business Park Glossop Derbyshire SK13 6LG T: 01457 868888 E: tony_bowkermachinery@hotmail.com W: www.ukpowdercoating.com
Table of contents Page Contents 2 7 Declarations of Conformity 8 Safety Instructions 9 10 Operating Instructions 11 19 Test Reports and Schematics 20 Assembly Instructions 1
2
3
4
Declaration of Conformity Counterpart Letter Manufacturer: Bowker Machinery Ltd Machine or Item of Equipment: Spray Booth Serial Number: Complies with current European Legislation: EN 746-2:2010 Complies with British Standard 'Industrial thermo processing equipment' BSEN746-2:2010 Low voltage directive 2006/95/EC EMC directive 2004/108/EC and Electromagnetic Compatibility Regulations SI2006 No.3418 5
EC Declaration of Conformity We declare that unit Serial No: Conforms to: BSEN746-2:2010 European standard EN746-2:2010 Low voltage directive 2006/95/EC Gas appliance directive: 90/396/EEC EMC directive 2004/108/EC and Electromagnetic Compatibility Regulations SI2006 No.3418 Signed: Anthony Bowker Director Bowker Machinery Ltd Unit 29 Dinting Vale Business Park Glossop Derbyshire SK13 6LG 6
Form MME The following work has been carried out by Bowker Machinery Limited to ensure that products comply with The Supply of Machinery (Safety) Regulations 2008 as amended by The Supply Machinery (Safety) (Amendment) Regulations 2001, and are in complinace with the current CE legislation. The Spray Booths designed and built by Bowker Machinery Limited adopt the following safety features: Filtration Filtration is achieved by using cartridge flters in an open compartment. The fltered clean air (now devoid of powder particles) then passes through a sealed plenum chamber and via the centrifugal extraction fan back into the factory atmosphere. The system avoids any explosion risk that may be caused by passing powder laden unfltered air into a sealed chamber. Sound Level Due to the level of air fow required the noise level determines that ear defenders are required. Structure Tests are carried out on the stability and structural strength of the spray enclosure. All operating and installation instructions are supplied on delivery. 7
Safety Instructions for Spray Booths 1. Ensure that a clear unrestricted supply of air is available to ensure that the extraction fan is able to work efciently. 2. Do not obstruct the fan outlets in any way. 3. If spraying wet paint, the fans must be ducted to outside. 4. Do not store any goods on the roof of the spray booth. 5. Protective clothing, including ear defenders and suitable breathing masks must be worn when spray painting. Filtration Effciency The cartridge type flters (powder only booths) are designed to flter 99% of all particles down to 5 microns. Important Notice Powder paint manufacturers supply powder in particle size whereby 90% of the particles are in a size range of 200 microns. Some particles however will inevitably be much smaller. A particle size of less than 5 microns will migrate through almost any flter. 8
How to change the time intervals between cleaning blasts 1. Check LOGO screen 2. Date 3. Esc STOP PROGRAM SET UP NETWORK DIAGNOSTIC 4. Highlight PROGRAM 5. OK 6. Set Param 7. OK 8. BO5 9. Set to desired time (e.g. 30 seconds): TH 00.40S TL 30.00S Do not alter TH, this is the blast duration 10. OK 11. ESC 9
Operating Instructions for Cartridge Filter Spray Booths A clean air supply rated at a minimum 6 C.F.M @ 90 P.S.I is required. The air supply must be fltered but not lubricated as unfltered air could lead to fragments of dirt and debris being delivered to the diaphragm valves. This may lead to the rubber diaphragm being perforated or the valve sticking open. Both of these faults will result in a constant stream of air passing through the flter. The factory timing calibration is set at 0.2 of a second pulse duration and an interval time of 15 seconds between each flter pulse. Under heavy and prolonged use it may be necessary to modify these parameters, this decision is usually determined if the efciency of the booth begins to diminish and re-programming by Seimens P.L.C. must be done only after consultation with Bowker Machinery. Under normal working conditions the cylinder cartridge flters with have a minimum 1 year life span, replacement flters are kept in stock at Bowker Machinery and replacement is facilitated by 12mm nut on the underside of each flter. The flter should be blown with a hand air gun once each week with care taken to clean the top of the flters, an area the automatic cleaning seems to miss. The optimum pressure required by the self-cleaning mechanism is 60 90 P.S.I., however this may be lowered to a minimum of 30 P.S.I. if noice restraint is a factor. The pulsing will be noticeably quieter at this level, but the cleaning not as comprehensive. To assist cleaning in this situation it is advisable to run the machine at a higher pressure, say 90 P.S.I., for a period of 15 minutes at a convenient time. If wet paint is used the life of the cartridge flters will be reduced. Only spray within the confnes of the booth. Check the sealing of the flters on a regular basis. If powder is escaping through the booth, the cartridge flters are not sealing correctly. Due to having to use high pressure centrifugal fans to obtain the necessary air fow of 0.7m per second per 1m, the noise level determines that ear defenders are required. 10
Operational Testing of Spray Booths The spray booths manufactured by Bowker Machinery are tested in air fow in the following ways: A hand-held anemometer is used to take readings at a distance of 400mm from the face of the booth and at intervals of 300mm longitudinally. The combined total is then divided by the number of readings. The suction force equals an average of 0.7 per second or above. Important Notes The anemometer readings will vary over the face of the booth. The performance will drop when the flters become resistive. Due to the high air fow combined with a high pressure required necessitating the use of centrifugal fans with forward curve impellers, the resultant noise level will mean that ear defenders are required. It is strongly advised that our patented automatic switching device is used. Tests in production indicate that over 60% of the time the suction is not required, our switching device switches off the fans when the gun is in the holster, thus saving operating costs. 11
12
13
14
15
Panel Booth 16
Cartridge Booth 17
18
19
Assembly Instructions 1. Position main body 2. Fit and bolt the right and left hand panels to the body 3. Fit and secure the roof panel 4. Connect the air line and the power lead into a 32 AMP 5-pin red socket 5. Check the rotation of fans, must be clockwise looking from motor 6. Fit silencers if supplied (option) 7. Fit and connect lights 20