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Instruction Manual
D100291X012
Table 3. Fisher 3570 Actuator Specifications
Available Configurations
3570: Valve positioner with two relays and three
pressure gauges for monitoring input signal and
output pressures to the top and underside of the
actuator piston
3570C: Similar to 3570 except that the positioner is
equipped with automotive tire valves instead of
pressure gauges. The valves can be used for clip-on
test pressures gauges. The relay nozzles on these
positioners are locked in place with locknuts to resist
unwanted nozzle movement due to vibration
Input Signal
Standard Ranges: 0.2 to 1.0 bar (3 to 15 psig) or 0.4
to 2.0 bar (6 to 30 psig)
Split Ranges: Typically uses one half of standard range
when two control valves are operated by one input
signal from a single controller
Optional Ranges: As required within the limits of the
bellows
Bellows Pressure Rating
Standard Bellows: 3.4 bar (50 psig)
Optional Bellows: 6.2 bar (90 psig)
Supply Pressure
Maximum: 10.3 bar (150 psig)
Minimum: 2.4 bar (35 psig)
Output Signal
Type: Pneumatic pressure as required by the actuator
Action: Field reversible between direct and reverse
(see table 4)
(1,2)
Hysteresis
0.15% of total stroke or instrument pressure span
(1,2)
Resolution
0.2% of instrument pressure span
(1,2)
Repeatability
0.3% of instrument pressure span
1. These terms are defined in ANSI/ISA Standard S51.1
2. For actuator with positioner only. Does not apply to other constructions or actuator-valve combination.
3
3. Normal m
/hr.- normal cubic meters per hour (0_C and 1.01325 bar, absolute); Scfh - standard cubic feet per hour (60_F and 14.7 psia).
(1,2)
Frequency Response
See figure 3
Pressure Connections
Vent: 3/8 NPT
All Others: 1/4 NPT
Pressure Indications
3570C: Tire valves accept standard pressure gauge
chucks
3570: See table below
Number
Type of Indication
Positioner input signal
gauge
Cylinder supply pressure
gauge
Static Air Consumption
3
0.56 normal m
/hr (20 scfh) with 6.9 bar
(100 psig) supply pressure
Operative Ambient Temperature
With Nitrile O-Rings: -34 to 79_C (-30 to 175_F)
With Fluorocarbon O-Rings (Optional):
-18 to 149_C (0 to 300_F)
Construction Materials
Actuator:
Part
Base, Cover and Beam
Bellows
Bias and Range Spring
Relay Body
Relay Nozzle(s)
Diaphragm
O-Rings
Options
Fisher SS-52 clip-on chuck (with or without gauge) for
3570C positioners
480 Series Actuators
August 2012
Standard Gauge Range
Used
bar (psig)
0 to 2.1 (0 to 30) or
1
0 to 4.1 (0 to 60)
0
0 to 11.0 (0 to 160)
(3)
(1,2)
(3)
Material
Aluminum, die cast
Brass
Steel, Plated
Zinc, Die Cast
SST
Nitrile or Fluorocarbon
Nitrile or Fluorocarbon
3
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