J OIL-E-08 2008
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3.7 BLOWDOWN PROCEDURES (Daily tests)
Keep the boiler, water gauge, water column and interconnecting pipework free from sludge and scale
buildup by blowing down in the following manner:
Note: Where a boiler is operating continuously at steam pressure, advice should be sort from Fulton
regarding the appropriate blowdown procedure.
(a) Start the boiler and generate not more than 10psi of steam.
(b) Shut off both the burner and the pump.
Boiler Blowdown
(a) Fully OPEN the boiler main blowdown valve for not more than 5 seconds.
(b) CLOSE the valve.
Note: Where high levels of suspended solids are produced, longer and/or more frequent blowdown may be
required.
Water Column Blowdown
Note: The water column contains the pump ON/OFF probe, which is not safety locked.
(a) Switch the pump off at the pump interrupt/pump run switch.
(b) Open the water column blowdown valve for 5 seconds.
(c) Close the water column blowdown valve.
Wait for 10 seconds for the water in the boiler to stabilise after blowdown.
(d) Switch the pump on at the pump interrupt/pump run switch.
Australian Boilers only
Water Column Blowdown
1. Place the sequence valve lever into the
blowdown column position A.
2. Open the Column blowdown valve B for
5 seconds then CLOSE.
3. Place the sequence valve lever into the
blowdown leg position C.
4. Open the Column blowdown valve B for
5 seconds then CLOSE.
5. Return the sequene lever to the working
A
B/DOWN COLUMN
D
WORKING
POSITION
C
B/DOWN LEG
B
A
C
D
Fig. 14 SEQUENCING BLOWDOWN VALVE
Operating handle
shown in the
blowdown
position.
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