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AHEAD OF THE FLOW ®<br />
www.nibco.com<br />
Revision 4/18/2011<br />
System Control Products Index<br />
<strong>Ball</strong> Valve Actuation and Control ....................................................................92<br />
Circuit Balancing <strong>Valves</strong> ...........................................................................93<br />
<strong>Ball</strong> Valve Actuation Data Sheet.....................................................................94<br />
System Control <strong>Ball</strong> <strong>Valves</strong> ...................................................................... 95-96<br />
Torque Charts .................................................................................. 97-98<br />
Actuator Mounting Data ........................................................................ 99-102<br />
Three-Way Bronze Full Port T/S-585-W3 Series. ...................................................99<br />
Two-Piece SS/CS Reduced Port T-580-S6/TC-580-CS-R ............................................100<br />
Three-Piece Bronze Reduced/Full Port T/S-590/595 Series .........................................101<br />
Three-Piece SS/CS Full Port TM/KM/BM-590/595 Series ...........................................102<br />
For individual sizing of actuators to ball valves consult your NIBCO technical service representative.<br />
Torque:<br />
Torque is the effective rotary power required by a valve and/or delivered by an actuator. Torque is normally stated<br />
in inch/pounds or foot/pounds. This turning force in a ball valve is affected by three factors:<br />
1. Friction of the ball to seat<br />
2. Bearing friction (packing)<br />
3. Dynamic forces (pressure)<br />
Torque = Distance x Force<br />
Breakaway Torque is the total of the three factors listed above. This value is normally the highest required torque<br />
to operate a valve and is used in sizing actuators. The torque values listed in the corresponding charts are valid<br />
for water and lubricating fluids at ambient temperature. For dry and non-lubricating fluids, consult your NIBCO<br />
technical service representative.<br />
Actuator mounting dimensions for flanged ball valves, see pages 72-75.<br />
NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227<br />
TECH SERVICES PH: 1.888.446.4226 • FAX: 1.888.336.4226 • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: +1.574.295.3455<br />
www.nibco.com<br />
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