Page 486 - Boiler_Operators_Handbook,_Second_Edition

Appendices 471

Appendix Q

Suggested Mnemonic Abbreviations

The use of mnemonic abbreviations to simplify com- redundant (such as two safety shutoff valves in series)
munications and labeling of devices in a boiler plant so the number can be followed by a letter, indicated by
is a common practice. This is a recommended list for the asterisk (*). The two symbols (# and *) are shown
identifying plant devices on logs, equipment lists, only where the inclusion of a number/letter is common.
maintenance records, reports, etc. A plant can have
many identical devices that are numbered sequentially This list does contain duplicate abbreviations where it
(although earlier numbers may no longer exist) as in- is necessary to determine which one is correct by how
dicated by the pound sign (#). Also, some devices are and where it is used.

3VBP ..............Three valve bypass CPMS ............Circulating/condensate pump motor starter
AACV ............Atomizing air control valve CR ..................Control relay
AAPS .............Atomizing air pressure switch CW .................City water (piping)
ABC ...............Automatic blowdown control DA ..................Deaerator
ABCV ............Automatic blowdown control valve DEGAS ..........Degassifier
AFT ................Air flow transmitter DBB Double block and bleed (valve arrangement)
AIS .................Automatic Interruptible System DI ...................Draft indicator
ALWCO ........Auxiliary low water cutoff DI ...................Demineralized (water)
ASBOV ..........Atomizing steam blow-out valve DLT ................Drum level transmitter
ASCV .............Atomizing steam control valve DT ..................Draft transmitter
ASPS ..............Atomizing steam pressure switch FC ..................Flow controller
ASSV .............Atomizing steam shutoff valve FD ..................Forced draft
ASV ...............Anti-siphon valve FDF ................Forced draft fan
AT ..................Analysis transmitter FFT .................Feedwater flow transmitter
AW .................Acid waste FIC .................Flow indicating controller
BD ..................Blowdown (piping) FMS ...............Fan motor starter
BDFT .............Blowdown flash tank FOR................Fuel oil return
BDHX ............Blowdown heat exchanger FOP# .............Fuel oil pump
BDQT ............Blowdown quench tank FOS ................Fuel oil supply/suction
BF ...................Boiler feedwater (piping) FOT# .............Fuel oil tank
BFP# ..............Boiler feed pump FPSC ..............Frost proof sill cock
BFV ................Butterfly valve FR ...................Flame relay
BGV#* ...........Burner gas safety shutoff valve FR ...................Flow recorder
BLR# ..............Boiler FW .................Boiler feedwater (piping)
BO ..................Blowoff (piping) FWCV ............Feedwater control valve
BOQT ............Blowoff quench tank FWHTR .........Feedwater heater
BOS ................Blowoff separator FY ...................Flow totalizer
BV ..................Ball valve GCV ...............Gas flow control valve
BVV# .............Burner gas vent valve GFT ................Gas flow transmitter
CAFS .............Combustion air flow switch GOS ...............Gas - off - oil selector (switch)
CF ..................Chemical feed GPR ...............Gas pressure regulator
CHX ...............Condensing heat exchanger GT# ................Gas turbine
CO ..................Carbon monoxide GV ..................Gate valve
CO ................Carbon dioxide H ...................Hydrogen
2 2
COND ...........Condensate HFPS .............High furnace pressure switch
CP ..................Circulating pump HGP ...............High gas pressure (limit switch)
CP# ................Condensate polisher HIGP .............High ignitor gas pressure (limit switch)
CPMP ............Condensate pump HOT ...............High oil temperature (limit switch)