Fisher 3570 Instruction Manual page 27

Instruction Manual
D200137X012
Figure 10. Fisher 3570 Positioner
1
3/8 NPT VENT
CONNECTION
NOTE:
1 ZERO ADJUSTMENTS IS PART OF KEY 9 FOR EXTENSION TYPE BIAS SPRING.
40A8973‐C
B1840
Key Description
26 Valve Assembly
For 3570C only
27 Hex nut, brass
For 3570, 3571, 3573 (2 req'd)
For 3572, 3576, 3577 (1 req'd)
For 3570C (none req'd)
28 Instrument tubing assembly, copper
For all types except 3570C
29 Relay assembly, included in Repair Kits
*Recommended spare parts
PART 22
DIRECT
ACTION
1
EXTENSION TYPE
BIAS SPRING
ASSEMBLY
1/4 NPT
CYLINDER
BOTTOM
CONNECTION
Key Description
30 Relay gasket, (2 req'd)
Chloroprene (std. const.)
Fluorocarbon (hi‐temp. const.)
31 Machine screw, pl steel
For 3570, 3570C, 3571 (6 req'd)
For 3572, 3573, 3576, 3577 (3 req'd)
32 Cap screw, pl steel (2 req'd)
33* O‐ring
Nitrile (std. const.)
Fluorocarbon (hi‐temp. const.)
3570 Positioners
September 2015
SECTION OF PART 29
1/4 NPT
1/4 NPT
SUPPLY CONNECTION
INPUT SIGNAL
CONNECTION
27