Buying Guide

97
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: [phone] • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: [phone]
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System Control Products Index
Ball Valve Actuation and Control ....................................................................98
Ball Valve Actuation Data Sheet.....................................................................99
System Control Ball Valves
....................................................................100-101
Torque Charts
................................................................................102-103
Actuator Mounting Data .......................................................................104-107
Three-Way Bronze Full Port T/S-585-W3 Series...................................................104
Two-Piece SS/CS Reduced Port T-580-S6/TC-580-CS-R ............................................105
Three-Piece Bronze Reduced/Full Port T/S-590/595 Series .........................................106
Three-Piece SS/CS Full Port TM/KM/BM-590/595 Series ...........................................107
For individual sizing of actuators to ball valves consult your NIBCO technical service representative.
Torque:
Torque is the effective rotary power required by a valve and/or delivered by an actuator. Torque is normally stated
in inch/pounds or foot/pounds. This turning force in a ball valve is affected by three factors:
1. Friction of the ball to seat
2. Bearing friction (packing)
3. Dynamic forces (pressure)
Torque = Distance x Force
Breakaway Torque
is the total of the three factors listed above. This value is normally the highest required torque
to operate a valve and is used in sizing actuators. The torque values listed in the corresponding charts are valid
for water and lubricating fluids at ambient temperature. For dry and non-lubricating fluids, consult your NIBCO
technical service representative.
Actuator mounting dimensions for flanged ball valves, see pages 77-80.