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Apollo Ball Valves (Top Entry - Operating Torques)
Torque Constants for Apollo® Top Entry Ball Valves****
Seat Options Valve Size Differential Pressures (psig)
100 285 500 740 1480
*1
2
3
5
6
*7
A
C
D
Z		 1/2 thru 1"
12.7 - 25.4mm		 85 110 140 180 290
1 - 1/2"
38.1mm 		 205 260 330 415 660
2"
50.8mm		 350 430 550 735 1,200
3"
76.2mm		 950 1250 1,650 2,000 3,200
4"
101.6mm		 2,000 2,500 3,300 4,100 6,500
6"**
152.4mm**		 5,300 6,700 8,200 11,400 18,000
8"**
203.2mm**		 11,000 14,000 18,500 25,000 36,000
10"**
254.0mm**		 18,500 22,000 30,000 40,000 62,000

 

Seat Options Valve Size Differential Pressures (psig)
100 285 500 740 1480
4
8
***9
B		 1/2 thru 1"
12.7 - 25.4mm		 115 160 210 260 450
1 - 1/2"
38.1mm 		 270 370 480 590 1,000
2"
50.8mm		 475 650 860 1,050 1,750
3"
76.2mm		 1,250 1,850 2,400 2,950 4,900
4"**
101.6mm		 2,700 3,700 4,900 5,900 10,000
6"**
152.4mm**		 7,410 10,100 13,400 16,400 25,300
8"**
203.2mm**		 15,000 20,000 26,000 34,500 56,000
10"**
254.0mm**		 25,000 32,000 45,000 60,000 96,000

* Reduce torque by 30% for PTFE seats
** Gear operator or actuation recommended
*** Increase torque by 10% for Ceramic seats
****For Full Port Figures, use one valve size larger

Torque Adjustment Factors
     
Provision
Condition
Additional Factor
     
Type of Operation
ON/OFF Service
0
Modulating
0.25
Process Media
Liquid, Clean Particle Free
0
Liquid, Dirty, Slurry, Raw Water
0.3 to 0.8
Liquid, Black Liquor, Lime Slurry
0.8
Liquid, Oil, Lubricating
-0.3
Liquid, Viscous, Molasses
0.3
Gas, Clean & Wet, Saturated Steam
0
Gas, Dry, Superheated Steam
0.3 to 0.5
Gas, Dirty, Air Slurry, Natural Gas
0.5 to 1
Oxygen, Chlorine
0.5
Frequency of Operation
Once per Day or More
0
Once per Day to Once per Week
0.2
Once per Week to Once per Month
0.5
Once per Month or Less
1
     
 
Example: 
Selected Valve: 3" 150 w/#6 seat (Model: CS-C60-BO1)
Torque Constant:
1250 in-lbs
Service Factors:
ON/OFF Service
0.0
Clean Dry Air
0.3
Weekly Operation
0.2
Net Service Factor
0.5

"In Service" Valve Torque: 1250 x (1 + 0.5) = 1875 in-lbs
This is the valve torque used to select an actuator.
 
     

There are several elements involved in developing an appropriate "in-service" valve operating torque. Selection of the basic valve torque constant, shown at the left establishes the nominal valve torque based on the valve size, specified valve seat and the approximate working pressure.

Armed with the nominal valve operating torque, adjustments are now made to account for individual service conditions. These factors are selected from the table at the lower left. They are additive, or combined in series and used to arrive at the "in-service" torque.

 
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8730 Lambright Rd.
Houston, TX  77075
Phone
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Fax
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Email
Sales@superiorvalves.com
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