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Fisher A31A, Инструкции по эксплуатации

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Model A31A

7

Table 5. Hex Head Screw, Stud Bolt and Cap Screw Data

(1)

Valve

Size,

No. of Cap Screws

No. of Stud Bolts

Size-Dia. Inch & Thread

Length of Cap

Screws,Inch

Length of Stud

Bolts,Inch

Size,

Inches

Class 150

Class 300

Class 150

Class 300

Class 150

Class 300

Class 150

Class 300

Class 150

Class 300

Single-Flange Style

(2)

14

24

40

- - -

- - -

1-8

1-1/8-8

2-3/4

3-1/2

- - -

- - -

16

32

40

- - -

- - -

1-8

1-1/4-8

3

3-3/4

- - -

- - -

18

32

48

- - -

- - -

1-1/8-8

1-1/4-8

3-1/4

4

- - -

- - -

20

40

48

- - -

- - -

1-1/8-8

1-1/4-8

3-1/2

4

- - -

- - -

24

40

48

- - -

- - -

1-1/4-8

1–1/2-8

3-1/2

4-1/2

- - -

- - -

Wafer-Style

14

- - -

8

12

16

1-8

1-1/8-8

- - -

3-1/2

9-1/2

12

16

- - -

8

16

16

1-8

1-1/8-8

- - -

3-3/4

10

13-1/2

18

- - -

8

16

16

1-1/8-8

1-1/4-8

- - -

4

11

13-3/4

20

- - -

8

20

20

1-1/8-8

1-1/4-8

- - -

4

12

14-1/2

24

- - -

8

20

20

1-1/4-8

1-1/2-8

- - -

4-1/2

14

16-1/2

1. Thread engagement in accordance with ANSI B31.3-1976 “Chemical Plant and Petroleum Refinery Piping”.
2. Bolting lengths are based on installation of valve between standard raised face flanges and utilizing flange gaskets with a final compression thickness of 1/8 inch. When gaskets
used have a final compression thickness of less than 1/8 inch, reduce bolting lengths shown by 1/4 inch.

Figure 4. Proper Installation Steps

B2263-1/IL

Adjusting the Actuator Travel Stops or
Travel

Key number locations are shown in figure 9, unless
otherwise noted.

1.  Refer to the actuator instruction manual to locate
the actuator travel stop that control the closed position
of the valve disk (key 2). When adjusting the travel
stop or travel, make sure that the disk is from 0 to
0.030 inch (0 to 0.76 mm) away from the internal stop

A5557/IL

Figure 5. Properly Installed Wafer-Style Valve

in the valve body. This adjustment is necessary to be
certain that the actuator output torque is fully absorbed
by the actuator travel stop or by the actuator. The in-
ternal travel stop in the valve body should not absorb
any of the actuator torque.

2.  Before installing the valve/actuator assembly in the
process line, cycle the valve several times to be sure
the valve disk returns to the proper position.

Installing the Valve

The maximum allowable inlet pressures for Model
A31A valves are consistent with the applicable ANSI
pressure/temperature ratings except where limited by
the material capabilities as shown in table 2 or figure
3.

Refer to table 5 for the quantity and size of line bolting
required to install the valve in the pipeline.

Содержание A31A

Страница 1: ...odel A31A High Per formance Butterfly Valve see figure 1 Refer to sep Figure 1 Typical Model A31A Valves W5812 1 IL W5811 1 IL arate instruction manuals for information covering the actuator and accessories Only personnel qualified through training or experience should install operate and maintain this control valve If you have any questions concerning these instruc tions contact your Fisher Contr...

Страница 2: ...rols Catalogs 10 and 12 Flow Coefficient Ratio 2 100 to 1 Noise Levels See Fisher Controls Catalogs 10 or 12 for sound pressure level prediction Valve In Line Position Shaft horizontal See figure 4 Valve Actuator Action With diaphragm or piston rotary actuator field re versible between J push down to close extending actuator rod closes valve and J push down to open extending actuator rod opens val...

Страница 3: ...Model A31A 3 Figure 2 Maximum Pressure Temperature Ratings B2335 2 IL ...

Страница 4: ... to 300 65 to 300 80 to 400 40 to 450 40 to 149 54 to 149 62 to 204 40 to 232 Seal Ring NOVEX S31600 Seal 3 Ring Class 150 NOVEX S31600 Seal 3 Ring Class 300 NOVEX S21800 Seal Ring Class 300 20 to 1000 20 to 1500 20 to 1500 29 to 538 29 to 816 29 to 816 Seal Ring Cryogenic Seal Ring Contact your Fisher Controls sales representative or sales office 1 NACE trim constructions are available consult yo...

Страница 5: ...flanges or pipe mating with valves are shown in tables 3 and 4 Valve Orientation The valve can be installed in any orientation however it is recommended that the valve drive shaft be hori zontal and the actuator vertical as shown in figure 4 Install the valve with the high pressure shutoff side in the direction noted by the flow arrow for proper instal lation and see figure 4 for more information ...

Страница 6: ... the minimum pipe or flange I D required for disk swing clearance Table 4 Valve Body Data Wafer Style Valves Class 300 VALVE SIZE INCHES SHAFT DIA AT YOKE BEARING FACE TO FACE DIMENSI ON 1 MINI MUM I D 2 APPROX WEIGHT POUNDS INCHES Inches Wafer Single Flange 14 1 3 4 4 5 8 11 98 276 510 16 1 3 4 5 1 4 13 63 417 663 18 2 1 4 5 7 8 15 32 524 907 20 2 3 4 6 1 8 17 40 817 1215 24 2 3 4 7 1 8 20 59 105...

Страница 7: ...ting lengths shown by 1 4 inch Figure 4 Proper Installation Steps B2263 1 IL Adjusting the Actuator Travel Stops or Travel Key number locations are shown in figure 9 unless otherwise noted 1 Refer to the actuator instruction manual to locate the actuator travel stop that control the closed position of the valve disk key 2 When adjusting the travel stop or travel make sure that the disk is from 0 t...

Страница 8: ...al torque value tighten each flange bolt again to allow for gasket compression Packing Adjustment and Shaft Bonding WARNING Personal injury could result from pack ing leakage Valve packing was tight ened before shipment however the packing might require some readjust ment to meet specific service condi tions 1 For PTFE or graphite packing Tighten standard packing follower nuts only enough to preve...

Страница 9: ...tuator instruction manual for actuator removal and replacement procedures The actuator stops or travel stops must limit the rotation of the valve shaft See the CAUTION below CAUTION When using an actuator the actuator travel stop or actuator travel stop for actuators without adjustable stops must be adjusted so the disk stop in the valve does not absorb the output of the actuator Failure to limit ...

Страница 10: ... extractor to remove packing Insert the corkscrew like end of the tool into the first piece of packing and pull firmly to remove the packing Repeat this process until all packing parts have been re moved CAUTION Be careful when cleaning the packing box Scratches to the upper shaft key 3 or inside diameter of packing bore might cause leakage 4 Before installing new packing clean the packing box 5 I...

Страница 11: ...ve disk can occur if the disk is not closed when the valve is being removed from the pipeline If nec essary stroke the actuator to place the disk in the closed position while remov ing the valve from the pipeline 3 Loosen the flange bolting that holds the valve Make sure the valve cannot slip or twist while loosen ing and removing the bolting 4 Before removing the valve from the pipeline make sure...

Страница 12: ...ou have a maintenance kit use the seal installation tools 3 Carefully tuck the O ring downward into the body T slot until the seal ring is completely entrapped in the body T slot and it completely covers the backup O ring 4 Re install the retaining ring and the socket head cap screws Tighten the cap screws just enough to eliminate any movement of the retaining ring Do not over tighten the retainin...

Страница 13: ...ve disk is not in contact with the valve internal travel stop see figure 5 The valve disk should be positioned from 0 to 0 030 inch 0 to 0 76 mm away from the inter nal stop in the valve body see figure 5 9 Use an appropriate tool such as a feeler gauge to position the disk key 2 from 0 to 0 030 inch 0 to 0 76 mm away from the internal stop in the valve body This adjustment is necessary to be cert...

Страница 14: ...inside thread of the pins The rod should ex tend several inches above the disk when it is screwed into a pin d After screwing the rod into the pin slide the spacer over the rod and pin Thread a nut onto the rod and tighten it As you tighten the nut the nut will drive the spacer against the disk The increas ing force will draw the pin from the disk 6 The gasket retainer keys 19 and 20 figure 9 on t...

Страница 15: ...packing box Push the drive shaft throught the bearing Hold the drive shaft drive bearing key 24 in the valve body bore against the opening of the drive shaft bearing bore Push the drive shaft through the bearing bore just enough to hold the thrust bearing 6 Insert the follower shaft through the bore in the valve body uncovered by removal of the gasket retain er Hold the follower shaft thrust beari...

Страница 16: ...tial pin disk pin key 9 packing key 13 and gasket key 20 for the lower shaft opening When corresponding with your Fisher Controls sales representative or sales office about a Model A31A valve please identify the valve as a Model A31A and provide the valve serial number For valve actuator combinations assembled at the factory the valve seri al number is stamped on the nameplate attached to the actu...

Страница 17: ...Model A31A 17 Figure 9 Model A31A Wafer Style Valve Assembly B2388 IL ...

Страница 18: ...re 128461 Printed in U S A EFisher Controls International Inc 1991 1998 All Rights Reserved ENVIRO SEAL POSI SEAL NOVEX Phoenix III Fisher Fisher Rosemount and Managing The Process Better are marks owned by Fisher Controls International Inc or Fisher Rose mount Systems Inc All other marks are the property of their respective owners ...

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