Ideal for the Positioning of:
- Butterfly Valves
- Dampers
- Louvers
- Gas and Oil Burner Valves
- Blast Gates
- Variable Pitch Fans
- Metering Pumps
- Speed Change
Positioner cylinder operating pressure: 20
PSI to 100 PSI air only.
|
Standard: |
Instrument Span: |
12 PSI |
|
Range: |
3 PSI to 15 PSI |
|
Consult factory for other options. |
Repeatability: 1/8" to 1/4" on all positioners.
2DO NOT ROTATE PISTON ROD. This will affect
factory setting.
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Mounting Options: |
Flush mount (except Model B490) |
|
Front face mount |
|
Front flange mount (from Series B & J) |
|
Front, rear or center trunnion (from Series B & J) |
|
Accessories (from Series B & J) |
Positioner Specifications
The C31 Positioner is a single acting, spring
return. The piston rod extends on instrument air increase. A spring
on the piston rod end causes the piston rod to retract as instrument
air is decreased or lost. If air supply is lost, piston rod will
retract. The extending force is diminished by the spring force;
therefore, it is impossible to get 100% force in either direction.
|
Model |
Spring Forces |
Available Strokes |
|
B490 |
Consult Factory |
2" - 10" |
|
B700 |
Not Available |
2" - 10" |
|
B960 |
Consult Factory |
2" - 10" |
|
B1600 |
Consult Factory |
2" - 10" |
|
B1960 |
Not Available |
|
|
J2800 |
Consult Factory |
2" - 10" |
|
J5000 |
Consult Factory |
6" - 14" |
The J21 or J22 Positioners are double acting.
The J21 starts out with the piston rod fully retracted and extends
on instrument air increase. The J22 starts out with the piston
rod fully extended and retracts on instrument air increase. 100%
force in both directions is possible with the J21 or J22.
Standard stroke lengths are 2" through 14" in 1"
increments.
|
C31 Specifications |
J21 or J22 Specifications |
|
Supply Pressure Effect: |
Less than 0.15% per PSI |
Supply Pressure Effect: |
Less than 0.15% per PSI |
|
Ambient Temperature Range: |
-20°F to +150°F |
Ambient Temperature Range: |
-20°F to +150°F |
|
Flow Capacity (Dynamic): |
Up to 5.0 SCFM in either direction with a 100 PSI supply. |
Flow Capacity (Dynamic): |
Up to 5.0 SCFM in either direction with a 100 PSI supply. |
|
Air Consumption (Static) |
0.3 SCFM with 40 PSI supply pressure. |
Air Consumption (Static) |
1.0 SCFM with 40 PSI supply pressure. |
|
Air Supply: |
20 PSI to 100 PSI |
Air Supply: |
20 PSI to 100 PSI |
|
Adjustment: |
Zero adjust is external and can be made without tools. |
Adjustment: |
Zero adjust is external and can be made without tools. |
STANDARD REPAIR KITS CAN BE USED TO REPAIR J21 OR J22 CYLINDERS.
C31 CYLINDERS SHOULD BE REPAIRED AT THE FACTORY BECAUSE OF HIGH
COMPRESSION SPRING INSIDE.
REPLACEMENT C31, J21 OR J22 POSITIONERS, RANGE SPRING OR RANGE
SPRING ASSEMBLIES CAN BE PURCHASED. CONSULT FACTORY FOR OTHER
PARTS.
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