### 73 Built-In Valve Positioner

```Valve Positioners
Series 73 Built-In Valve Positioner
Technical data
Spring Table
Instrument Input Pressure Span (PSI)
4
5
Valve
Stroke
Inches
3
6
8
10
12
16
20
24
- Item No. of Range Spring Series
12395 Series ±5% Stroke Range Tolerance
Example: 12395-1212
1/4
1212
1012
812
612
512
412
5/16
1612
1212
1012
712
612
512
3/8
1812
1412
1212
1012
712
612
7/16
2012
1812
1412
1012
812
712
1/2
2412
2012
1612
1212
1012
812
9/16
2812
2012
1812
1412
1012
1012
5/8
3212
2412
2012
1612
1212
1012
3/4
3612
2812
2412
1812
1412
1212
7/8
4412
3612
2812
2012
1812
1412
1
4812
4012
3212
2412
2012
1612
1-1/8
5612
4412
3612
2812
2012
1812
1-1/4
6412
4812
4012
3212
2412
2012
1-1/2
6412*
4812
3612
2812
2412
1-5/8
6412*
4812
4012
3212
2612
1-3/4
6412*
5612
4412
3612
2812
4812
4012
3212
2-1/4
2
6412*
5612
4412
3612
2-1/2
6412*
4812
4012
2-3/4
6412*
4812
4412
6412*
4812
3
3-1/2
5612
4
6412*
1) The maximum zero pressure for
Model 73N12F is 9 psig when the
12395 series range spring is used.
2) The maximum zero pressure for
Model 73N24F is 15 psig for
instrument pressure spans of 16
psi or greater, and 28 psig when
used for spans of 12 psi or less.
Consult Factory
3) The maximum instrument
pressure for Model 73N-FR is
15 psig for instrument pressure
spans of 12 psi or less, and 27 psi
for spans of 16 psi or greater.
Mounting Dimensions
Spring Selection
1. Find the valve stroke nearest the desired valve stroke.
2. Find the instrument input pressure span nearest the desired
instrument input pressure span.
3. Select the proper range spring at the intersection of the valve
stroke and the instrument input pressure span columns.
3.8
```