Fulton FB-S Horizontal Firetube Boiler - Manual (Page 65)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 65
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
centered. 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
OVERTIGHTEN.
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.