750-368
CBEX Elite 100-1200 HP
3-5
3.3 — Water Treatment
Before turning on the pump motor be certain that all valves in the water feed line are open to prevent possible
damage to the feed pump mechanism. After opening the valves, momentarily energize the feed pump motor to
establish correct pump rotation. With the correct rotation established, close the boiler feed pump entrance
switch. The pump should shut down when the water level reaches the proper level.
Feedwater pumps must have adequate capacity to maintain required water level under all operating conditions.
Check the feedwater pumps periodically and maintain as necessary to prevent unexpected breakdowns.
FIGURE 3-4. Feed piping, typical
3.3 — Water Treatment
Properly treated boiler feed water, coupled with good engineering and operating practices, lead to maximum
effectiveness and long trouble-free life of pressure vessels. Contact your local Cleaver-Brooks authorized repre-
sentative for information on how to prevent the presence of unwanted solids and corrosive gases.
Objectives of water treatment are:
1. Prevent hard scale deposits or soft sludge deposits, which reduce heat transfer and can lead to overheated
metal and costly downtime and repairs.
2. Eliminate corrosive gases in the supply or boiler water.
3. Prevent inter-crystalline cracking or caustic embrittlement of boiler metal.
NOTE: Prior to operating the pump, carefully check the alignment of the flexible coupling, if one is used. A properly
aligned coupling will last a long time and provide trouble-free mechanical operation.
NOTE: In the event that water column isolation valves are provided, it must be established that the valves are open
and sealed or locked in the open position. If the valves are installed, it is illegal to operate the boiler with closed or
unsealed open valves.
The isolation valves and the water column piping must be locked open during operation. Failure to do so may result
in a low water condition. Failure to follow these instructions could result in serious injury or death.
2
1
3
3
4
5
6
Globe Valve
Check Valve
ITEM
2
1
DESCRIPTION
Globe Valve
Gate Valve
3
4
Feedwater Valve 5
Strainer 6
To Next Page
Loading...
Need help?
General
