background image

Fulton Boiler FBS Series 

FBS 01/05                                                                28 

                                                                                 

 

FITTING NEW GASKET 

 

General 

CAUTION 

TOPOG-E  gasket  have  a  finite  life  after  installation  and  must  be  renewed  annually.  It  is 

important that the instructions given in this section are adhere to. 

The boilers are fitted with TOPOG-E gaskets in all the inspection holes of the boiler. These gaskets 

work very well and millions have been safely used over the last 30 years, however, it is absolutely 

essential to observe a few simple rules in order to get the best performance from your installation. 

Elastomeric  Vulcanizates,  which  form  the  basis  of  TOPOG-E  gaskets,  undergo  degredation  from 

many sources including heat, oxygen, stress, and overdosing from certain types of water treatment. 

This takes the form of material oxidation, hardening/embrittlement and cracking which may result in 

gasket failure. Steps must be taken to minimize the effects of such attacks. 

Water treatment and oxygen attack can be combated by ensuring that the gasket is aligned correctly 

so that only the extreme edges of the gasket are exposed. If a new gaskets leaks after fitting this is 

almost    certainly due to incorrect seating or alignment. As such gaskets are very reduce the life of 

the gasket and cause problems later. 

Under stress can be avoided by tightening just sufficiently to stop any leakage when fitting cold and 

before firing the boiler. Fire the boiler and then gradually warm the boiler up, allowing the increasing 

steam pressure to take over and complete the seal. The will allow the gasket material to contract 

naturally and follow the topography of the mating surfaces. The securing nut can then broken when 

the boiler is cold and under negative pressure. 

Gentle warming of the boiler on initial firing after maintenance will also help to ensure that the rubber 

‘cures  to  shape’.  If  the  rubber  post-cures,  the  elastic  memory  will  be  destroyed  and  any  initial 

over-tightening  will  cause  the  gasket  to  become  hardened  and  embrittled,  leading  to  cracks  and 

eventual failure. 

Fitting Instructions 

Blowdown  the  boiler  completely  and  examine  all  inspection  holes  in  the  boiler.  If  any  leakage  is 

evident, proceed as follow: 

(a)  Disassembly the crabs and cover plate and remove the inspection hole assembly. Remove the 

old gasket and thoroughly clean the mating faces of the cover plate and boiler ring. 

(b)  Pace the new Topog-E gasket on the cover plate, ensure the gasket is the correct size and is 

seating flat against the plate. Do not use any grease, lubricant or adhesive. If the new gasket is 

not seated properly before the plate is tightened, the gasket may be pinched causing a failure 

when the pressure builds up. 

(c)  Position the cover plate in the boiler ring, ensuring that the plate is correctly centred. An off-centre 

cover plate can concentrate forces on the gasket and cut it in two. The cover plate may also drag 

on the boiler hole ring and fail to seal as the pressure rises. Set the crabs further quarter of the 

turn using a spanner. DO NOT OVERTIGHTERN. 

NOTE 

Ensure the gasket is aligned correctly so that only the extreme edges are exposed to water 

treatment or oxygen attack. If the gasket is misaligned, over tightening to seal a leak will not 

prevent subsequent leakage at a later date. 

(d)  Gradually  warm  up  the  boiler,  allowing  steam  pressure  to  make  the  seal.  If  the  gasket  leaks 

during  pressure  build  up,  tighten  the  securing  nuts  sufficiently  only  to  stop  the  leakage.  It  is 

important to keep the nuts correctly tightened thereafter, this prevents the vacuum developed by 

cooling on shutdown from feeding and draining the boiler. 

NOTE 

New gasket fitted to inspection holes located along the bottom of the boiler are more difficult 

to install without leaking. Small particles of the scale or sand tend to run down on the mating 

surfaces after cleaning but prior to assembling. This condition is likely to have occurred if 

excess tightening is required to stop a leak before warming the boiler. In this event, the best 

course of action is to drain the boiler and repeat the gasket fitting procedure. Failure to do so 

will severely reduce the life of the gasket. 

(e)  Clean and inspect each water gauge sight glass. If any water leakage is evident, renew the sight 

glass gasket. 

 

 

Summary of Contents for FB-S series

Page 1: ...FULTON BOILER FB S SERIES INSTALLATION OPERATION MAINTENANCE MANUAL...

Page 2: ...pment the following tests are made to assure the customer the highest standards of manufacturing a Material inspections b Manufacturing process inspections c ASME welding inspection d ASME hydrostatic...

Page 3: ...ney requirements Water supply Valves Electrical Requirements Gas Supply Oil Supply Installation check points Cleaning Boil out of new unit 4 Controls Burner Boiler Control panel Burner 5 Operation Fit...

Page 4: ...be highlighted It is the responsibility and duty of all personnel involved in the operation and maintenance of this equipment to fully understand the WARNINGS CUATIONS and NOTES by which hazards are...

Page 5: ...erating and maintenance instructions are followed FB S boiler is a cylindrical vessel with horizontal tubes passing through and connected to the front and rear tube sheets The vessel contains the wate...

Page 6: ...1 1200 Kcal kg heavy oil 10 960 kcal kg nature gas 8 900 kcal m 3 town gas 3600kcal m 3 2 Specification and dimensions are approximate the Fulton Companied reserve the right to change specifications...

Page 7: ...g Dimensions of the boiler and the necessary clearance Model FB S 1 1 0 1 5 1 0 2 1 0 3 1 0 4 1 0 4 1 25 6 1 25 Total length mm 3324 3624 4072 4772 4956 4956 5540 Total width mm 1705 1785 2100 2196 21...

Page 8: ...by accumulating condensation in flue F The installer should check the draft with a meter at 02 04 W C pressure 0 508 to 1 016mm with the burner off If the pressure is too low a balancing damper should...

Page 9: ...ormation on how to prevent the presence of unwanted solids and corrosive gases Accomplishment of the above objectives generally requires proper feed water treatment before and after introduction of th...

Page 10: ...the burner gas train and furnace while running at full input This pressure is different from the kinds of the burner used for the boiler On FB S1 1 0 to FB S3 1 0 the pressure of supply gas is 50 100...

Page 11: ...inlet should be made using the flexible pipes supplied with the burner C One gate valve should installed to the inlet and outlet of the circulating pump separately A pressure gauge 0 60psi is needed a...

Page 12: ...nd cleaning of the waterside of the pressure vessel should be provided during the course of initial start up The pressure vessel and the steam and return lines or hot water piping represent in effect...

Page 13: ...irring it at all times until the chemical is completely dissolved Add the chemical slowly and in small amounts to prevent excessive heat and turbulence 3 An over flow pipe should be attached to one of...

Page 14: ...e pressure vessel should be drained after being properly cooled to near ambient temperature Hand hole covers should be removed and waterside surfaces should be inspected for corrosion pitting or forma...

Page 15: ...cator when fitted This lamp will illuminate and alarm sound when the water level reaches a pre determined high level The feed pump will stop When the water level falls to the normal working level the...

Page 16: ...with a sensing device to supervise the ignition sequence prove the flame is satisfactory and finally monitor the established flame Should any fault occur either during the ignition sequence or during...

Page 17: ...to preheat the oil to correct temperature The unit is equipped with three thermostats low temperature operating and limit A thermometer and hot oil filter are mounted together as one unit on the top l...

Page 18: ...2 and V3 remain closed for 23 seconds while the minimum side of the gas pressure switch PS checks for an increase in pressure If no crease occurs there is no leakage past V1 and the sequence continues...

Page 19: ...EQUENCE The burner operating sequence begins with a pre purge period on full air Fuel is then supplied to the burner at start rate and ignition initiated Start flame proving is followed by establishme...

Page 20: ...nly Off Burner Pump Switch to the PUMP ONLY position H The feed pump should start and fill the boiler to the pump off level and then switch off NOTE If the 2nd Low Water and High Pressure Alarm Reset...

Page 21: ...intain the internal temperature to a point that the boiler can be simple switched on preferably on low fire and then left to reach working temperature pressure The life expectancy of the boiler and do...

Page 22: ...ter level in the boiler either by evaporation or by opening the main blowdown valve with the key provided c Observe the water level in the water level gauges and check that as the water level reached...

Page 23: ...ed solids level to within the required limits The amount of blowdown and hence time required it dependent on the amount of TDS in the raw water supply the percentage condensate return water treatment...

Page 24: ...d Low Water Alarm Reset switch will extinguish the alarm will cancel and the burner will start NOTE Because the burner shuts down during this test it is possible that the steam load will rapidly decre...

Page 25: ...be within setting of low pressure and light pressure switch d Check burner air proving switch and high fire limit switch e Heavy oil fired unit oil temperature below minimum setting 4 Fuel valve inte...

Page 26: ...nadequate flame signal or open control in the running interlock circuit 7 Interlock device inoperative or defective 8 Air in the oil lines Bleed lines Boiler will not maintain pressure 1 Check oil sup...

Page 27: ...as soon as a leak occurs can prevent costly repairs later Check for signs of leaks on all valves and fittings and take the appropriate action Test all the boiler water level functions by evaporation...

Page 28: ...y cutting out the defective area and replacing with new fibre ensure the correct adhesive is used r Examine the end of the burner blast tube where it extends through the door into the furnace Clean of...

Page 29: ...itting Instructions Blowdown the boiler completely and examine all inspection holes in the boiler If any leakage is evident proceed as follow a Disassembly the crabs and cover plate and remove the ins...

Page 30: ...e boiler instruction manual shipped with your boiler Corrosive acid and chlorine based chemicals in the atmosphere can be damaging to this boiler It is the owner s responsibility to have the boiler ro...

Reviews: