Instruction Manual
D200137X012
3570 Positioners
September 2015
21
Figure 9. Sectional View of a Typical Relay
W0700‐1/IL
CLEAN‐OUT
PLUNGER
SUPPLY
OUTPUT
B
A
C
EXHAUST
F
E
R
D
G
A-SUPPLY PRESSURE AREA
B-RELAY OUTPUT PRESSURE VALVE
C-EXHAUST VALVE
D-RELAY OUTPUT PRESSURE AREA
E-DIAPHRAGM HEAD ASSEMBLY
F-NOZZLE
G-RELAY RESTRICTION PLUG AS
SEMBLY
R-FIXED RESTRICTION
NOTES:
OUTPUT PORT IS SHOWN
90 DEGREES TO THE FRONT OF
ACTUAL LOCATION.
1
1
40A8972‐B/DOC
NOZZLE AND LOCKNUT
USED WITH 3570C AND
3570PC POSITIONERS
Maintenance
Parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of parts
inspection and replacement depends upon the severity of service conditions. When inspection or repairs are required,
disassemble only those parts necessary to accomplish the task.
WARNING
Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:
D Always wear protective clothing, gloves, and eyewear.
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