CleaverBrooks CBEX Elite, Эксплуатация и обслуживание

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750-368
CBEX Elite 100-1200 HP 1-3
1.3 — Construction
Hot water is commonly used in heating applications with boiler supplied water to the system at 180º F to 220º
F. The operating pressure for hot water heating systems usually is 30 psig to 125 psig.
Steam and hot water boilers are defined according to design pressure and operating pressure.
Design pressure is the maximum pressure used in the design of the boiler for the purpose of calculating the min-
imum permissible thickness or physical characteristics of the pressure vessel parts of the boiler. Typically, the
safety valves are set at or below design pressure.
Operating pressure is the pressure at which the boiler normally operates. The operating pressure usually is main-
tained at a suitable level below the setting of the pressure relieving valve(s) to prevent frequent valve opening
during normal operation.
The type of service that your boiler is required to provide has an important bearing on the amount of waterside
care it will require.
Feedwater equipment should be thoroughly checked before use. Be sure that all valves, piping, boiler feed
pumps, and receivers are installed in accordance with prevailing codes and practices.
The close observance of water requirements for both steam and hot water boilers is essential to boiler life and
length of service. Constant attention to water requirements will pay dividends in the form of longer life, less
downtime, and prevention of costly repairs.
Care taken in placing the pressure vessel into initial service is vital. The waterside of new boilers and new or
remodeled steam or hot water systems may contain oil, grease, or other foreign matter. A method of boiling out
the vessel to remove accumulations is described in Chapter 3.
1.3 — Construction
Steam boilers designed for 15 psig and hot water boilers designed for 250º F at 125 psi or less are constructed
in accordance with Section IV, Heating Boilers, of ASME Code.*
Steam boilers designed for operating pressures exceeding 15 psig are constructed in accordance with Section I,
Power Boilers, of the ASME Code. Hot water boilers designed for operating temperatures above 250º F or 125
psi are likewise built to Section I of the ASME Code.
*CBEX Elite steam boilers are high pressure steam only.
1.4 — Steam Controls (all fuels)
1.4.1 — Controls
1.
Pressure Gauge : Indicates boiler internal pressure.
2.
Operating Limit Pressure Control: Breaks a circuit to stop burner operation on a rise of boiler pressure at a
selected setting. It is adjusted to stop or start the burner at a preselected pressure setting.