EMERSON 3570 Pneumatic Valve Positioners Instruction Manual

3570 Pneumatic Valve Positioners
Instruction Manual

Range Spring, Bias Spring, and Spring Retainer/Spacer Selection for Fisher™3570 PneumaticValve Positioners
Normally, no adjustments to the 3570 positioners are necessary upon initial installation. The positioner is set at the factory for the travel, input signal range, and action specified in the order. Adjustment is necessary when operating conditions are changed, when the unit has been dismantled and reassembled, or when the control valve travel does not correspond to the desired input signal range. If the operating conditions have changed a new range spring, bias spring, and spring retainer/spacer may be required. Refer to the signal range code descriptions below and Tables 1, 2, 3, and 4. Once the appropriate range spring, bias spring, and spring retainer/spacer are obtained refer to the Maintenance and adjustment procedures found in the 3570 instruction manual (D200137X012) available from your Emerson sales office or at Fisher.com. Refer to the instruction manual for ll other information regarding 3570 positioners.

Signal Range Codes

The range spring and the bias spring are matched to a specific input signal range and length of travel. Also, the spring retainer length is matched to the application on the 3570,  3570C, 3572, and 3573 positioners. Refer to figure 1 for the location of parts.
The signal range codes in table 1 are based on the following applications:

• Codes for valve travel up to and including 50 mm (2 inches) are used for actuators that have a 50 mm (2 inches) maximum travel. If the actuator’s maximum travel is greater than 50 mm (2 inches), an additional retainer spacer (key 235, see figure 1) is required. Refer to the parts list for the additional spring retainer spacer (key 235) part number.
• odes for valve travel greater than 50 mm (2 inches), up to and including 105 mm (4‐1/8 inches), are used for actuators that have a 105 mm (4‐1/8 inch) maximum travel, except the 480‐12 or 480‐15 Size 20 actuators which have a 54 mm (2‐1/8 inch) maximum travel. If the actuator’s maximum travel is greater than 105 mm (4‐1/8 inches), an additional retainer spacer is required. Refer to the parts list for the additional spring retainer spacer (key 235) part numbers
• Codes for valve travel greater than 105 mm (4‐ /8 inches), up to and including 206 mm (8‐1/8 inches), are for actuators that have a 206 mm (8‐1/8 inch) maximum travel.

If the valve travel is 105 mm (4‐1/8 inches) or less,  wo additional spring retainer spacers are required. Refer to the parts list for the additional spring retainer spacer (key 235) part numbers. If the input signal range and travel do ot match any of the selections in table 1, consult your Emerson sales office for information. To change the springs, refer to the range and bias spring procedures in the  Maintenance section of the 3570 instruction manual (D200137X012). From table 1, select the signal range that matches your application. Find the travel length for the application under the signal range selected, then use the code (from the direct or reverse column) that matches the direct or reverse operation of the positioner.
The first number in the code is used to identify the range spring, the letter in the code is used to identify the bias spring, and the second number (after the letter) is used to identify the spring retainer. For example, from table 1, for a signal range of 0 to 1.0 bar (0 to 15 PSIG), actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 1 is 6G3. The “6” indicates the range spring. The “G” indicates the bias spring. The “3” indicates the spring retainer.
Note
It is necessary to add the bias spring seat (key 8) to a unit when changing from an extension type spring (key 9) to a compression type spring (key 48).
When planning to change the bias spring in an existing unit, inspect the unit first to determine if the current bias spring is an extension type spring (key 9) or a compression type spring (key 48). To change from an extension type spring to a compression type spring, it is necessary to add the bias spring seat (key 8). Refer to the appropriate procedures in the Maintenance section found in the 3570 instruction manual (D200137X012). In some cases, it is necessary to add an additional spring retainer spacer or change from the standard bellows to the optional high-pressure bellows. Table 1 footnotes indicate the use of an additional spring retainer spacer or high-pressure bellows.
Use the code from table 1 while referring to tables 2, 3, and 4 to determine the part numbers for the range spring, bias spring, and spring retainer. Unless otherwise specified,  use the standard bellows. Also, no spring retainer spacer is required unless the spacer is specified in the footnotes of table 1.
Table 1. Fisher 3570 Signal Range Codes(1) Table1. Fisher 3570 Signal Range Codes(1) (Continued)

1. For 3570P signal range codes, contact your Emerson sales office.
2. Use spring retainer spacer 1J803846172; for additional information, see table 4.
3. Use spring retainer spacer 1J223346172; for additional information, see table 4.
4. Use spring retainer spacer 1J803946172; for additional information, see table 4.
5. Use with high-pressure bellows and spring retainer spacer 1J803946172; for additional information, see table 4.
6. Use with high-pressure bellows.
7. Use with high-pressure bellows and spring retainer spacer 1J223346172; for additional information, see table 4.
8. For use with 480‐12 or 480‐15 size 20 actuators.

Table 2. Range(1,2)

1. The range spring code number is the first number given in each signal range code listed in table 1. For example, for a signal range of 0 to 1.0 bar (0 to 15 PSIG), actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 1 is 6G3. The appropriate range spring is indicated by “6”.
2. Range springs do not have a color code. All range springs are silver.
3. The first six numbers of a range spring part number is also the tag number. For example, a range spring with part number 1H8914 000A2 has a tag number of 1H8914. Tags are attached to the parts at the time the parts are manufactured.

Table 3. Bias Spring (1,2)

A
B
C
D| Silver
Light blue
Red
Light green| 1H861827012(3)
1H893227012(3)
1H893327012(3)
1H896827012(3)
E
F
G
H| Dark green
Pink
Black
Brown| 1J2932X0012(4)
1J2933X0012(4)
1N7177X0012(4)
1R613427012(3)

1. The bias spring code letter is the letter given in each signal range code listed in table 1. For example, for a signal range of 0 to 1.0 bar (0 to 15 PSIG), actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 1 is 6G3. The appropriate bias spring is indicated by “G”.
2. It is necessary to add the bias spring seat (key 8) to a unit when changing from an extension type spring (key 9) to a compression type spring (key 48).
3. Compression type bias spring (key 48).
4. Extension type bias spring (key 9).

CODE NUMBER (1)

|

OVERALL LENGTH (2)

|

EFFECTIVE LENGTH (2)

|

PART NUMBER (3)

---|---|---|---

mm

|

Inches

|

mm

|

Inches

1| 57| 2‐15/64| 44| 1‐47/64| 1H8907X0012
2| 53| 2‐5/64| 40| 1‐37/64| 1H8908X0012
3| 50| 1‐63/64| 38| 1‐31/64| 1H8909X0012
4| 48| 1‐7/8| 35| 1‐3/8| 1H8911X0012
5| 43| 1‐11/16| 30| 1‐3/16| 1H8910X0012
7| 25| 31/32| 12| 15/32| 1H8912X0012
8| 22| 7/8| 10| 3/8| 1H8552X0012
10| 35| 1‐3/8| 22| 55/64| 1H8913X0012
12| 38| 1‐1/2| 25| 1| 1J3572X0012
13| 29| 1‐1/8| 16| 21/32| 1J9796X0012

1. Code numbers 6, 9, and 11 are not used.
2. Refer to figure 1
3. The spring retainer code number is the second number given in each signal range code listed in table 1. For example, for a signal range of 0 to 1.0 bar (0 to 15 PSIG), actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 1 is 6G3. The appropriate spring retainer is indicated by “3”.

Table 5. Spring Retainer Spacer

OVERALL LENGTH (1)

|

EFFECTIVE LENGTH (1)

|

PART NUMBER (2)

---|---|---

mm

|

Inches

|

mm

|

Inches

41| 1‐5/8| 29| 1‐1/8| 1L2069X0012
52| 2‐1/16| 40| 1‐9/16| 1J223346172
57| 2‐1/4| 44| 1‐3/4| 1J803846172
94| 3‐11/16| 81| 3‐3/16| 1P3957X0012
97| 3‐13/16| 84| 3‐5/16| 1J803946172
1. Refer to figure 1.
2. The spacer number is the first 6 characters of the part number and is stamped on the part.

Figure 1. Bias and Range Springs for Zero and Span Adjustments

NOTE:
THE BOTTOM OF THE BIAS SPRING POST THREAD MUST BE POSITIONED AS SHOWN FOR THE PROPER POSITION OF E‐RING TRAVEL STOPS.
AJ7270‐C
1H8907‐C
1J2233‐C
B2402
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners. The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singaporewww.Fisher.com

References

• Fisher.com
• Fisher.com
• Contact Us | Emerson US

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