Buying Guide
105
NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227
TECH SERVICES PH: 1.888.446.4226 • FAX: 1.888.336.4226 • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: +1.574.295.3455
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Revised 7/20/2018
Valve Terms and Piping Symbols
AC Alternating Current
ALL IRON All-Iron Construction
AMER STD American Standard
AMS Aeronautical Material
Specifications of the Society
of Automotive Engineers
APPROX Approximate
ASME American Society of Mechanical
Engineers
ASTM American Society of Testing Materials
ATM Atmosphere
BB Bolted Bonnet
BLR Boiler
B/M Bill of Material
BTU British Thermal Unit(s)
C Degree Centigrade
CxC Copper to Copper
CDA Copper Development Association
COND Condenser
COP Copper
CSA Canadian Standards Association
CV Check Valve
CWP Cold Working Pressure
CYL Cylinder
DC Direct Current
DD Double Disc
EXP VLV Expansion Valve
F Degree Fahrenheit
FF Flat Face
FxF Face to Face
FLG Flanged End
FM Indicates product has been approved
by Factory Mutual Laboratories
F/S Factor of Safety
FSPS Female Standard Pipe Size
FT LB Foot Pound
GPH Gallons Per Hour
GPM Gallons Per Minute
IBBM Iron Body, Bronze Mounted
IN LB Inch-pound
IPS Iron Pipe Size
MSS Manufacturers Standardization Society
of the Valve and Fitting Industry
NEC National Electrical Code
NPT American Standard Taper Pipe Thread
NRS Non-Rising Stem
OD Outside Diameter
OS&Y Outside Screw and Yoke
PNEU Pneumatic
PRESS Pressure
PRV Pressure Reducing Valve
PSI Pounds Per Square Inch
PSIA Pounds Per Square Inch Absolute
PSIG Pounds Per Square Inch Gage
RECIRC Recirculate(d)
RF Raised Face
RPM Revolutions per Minute
RS Rising Stem
S.A.E. Society of Automotive Engineers
SB Screw-in Bonnet
SE Screwed (Threaded) End
SJ Solder Joint
SPEC Specification
STD Standard
SWP Steam Working Pressure
TEMP Temperature
TRIM Term designating certain valve parts
such as discs, seat rings, stems, and
repacking seat bushings
UB Union Bonnet
UL Indicates product has been approved
by Underwriter's Laboratories, Inc.
VAC Vacuum
VOL Volume
WOG Water, Oil, Gas Working Pressure
WWP Water Working Pressure
Common industry terms and abbreviations
*Also used for general STOP VALVE symbol when amplified by specification.
Piping Symbols
1 Angle Valve
1.1 Check
1.4 Globe (elevation)
1.5 Globe (plan)
1.6 Hose Angle Same as Symbol 9.1
2. Automatic Valve
2.1 By-Pass
2.2 Governor-Operated
2.3 Reducing
3. Check Valve
3.1 Angle Check Same as symbol 1.1
3.2 (straight way)
4. Cock
5. Diaphragm Valve
6. Float Valve
7. Gate Valve
7*.1
7.4 Motor-Operated
8. Globe Valve
8.1
8.2 Angle Globe Same as Symbols 1.4 & 1.5
8.3 Hose Globe Same as Symbol 9.3
8.4 Motor-Operated
9. Hose Valve
9.1 Angle
9.2 Gate
9.3 Globe
10. Lockshield Valve
11. Quick-Opening Valve
12. Safety Valve
13. Stop Valve Same as Symbol 7.1
14. Tee
14.7 Side Outlet
(outlet down)
14.8 Side Outlet
(outlet up)
15. Union
Bell &
Flanged Threaded Spigot Welded Soldered
Bell &
Flanged Threaded Spigot Welded Soldered