Main Blowdown; Water Column Blowdown - FULTON J Series Installation, Operation And Maintenance Manual

MAINTENANCE - 4
4.3

MAIN BLOWDOWN

Keep the boiler, water level gauge (sight glass), water column and interconnecting pipework free
from sludge and scale build-up by blowing down in the following manner:
Note: Where a boiler is operating continuously at steam pressure, advice should be sought from Fulton Service
Department regarding the appropriate blowdown procedure.
1. Start the boiler and generate not more
than 10 psi of steam (see note).
2. Shut off both the burner and the pump.
Boiler Blowdown
1. Fully OPEN the boiler main blowdown
valve for not more than 5 seconds,
or as recommended by the water
treatment specialist.
2. CLOSE the valve.
Note: Where high levels of suspended solids are
produced, longer and/or more frequent blowdown may be
required.
4.4

WATER COLUMN BLOWDOWN

Note: The water column contains the pump ON/OFF
probe, which is not safety interlocked.
1. Switch the pump off (pump interrupt) at
the Pump Interrupt/Pump Run switch.
2. Open the water column blowdown
valve for 5 seconds.
3. Close the water column blowdown
valve and wait for 10 seconds for the
boiler to refill and the water to
stabilise in the vessel.
4. Switch the Pump Interrupt switch to
Pump Run.
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Figure. 21 - Main Boiler Blowdown Valve
Figure. 22 - Water Column Blowdown Valve
Fulton Ltd
JGASUK-IOMM-2015-2