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Instruction Manual

D103312X012

GX 3-Way Valve and Actuator

July 2017

15

the stem connector halves in the proper orientation so that when looking at the inside of the stem connector
halves, the flats are down and the beveled surfaces are up.

27. Align the pointer of the travel indicator (key 26) with the appropriate mark on the travel scale.
28. Tighten the stem connector cap screws (key 25) to 35 N

•

m (26 lbf

•

ft).

29. Tighten the packing follower (key 29) to the torque specified in table 4.

Alternately, the packing follower can be tightened by the following method:

a. Tighten the packing follower until the Belleville springs are compressed 100% (or completely flat), as detected by

a rapid increase in nut torque.

b. Loosen the packing follower 60

_

of rotation.

30. Ensure that the electric actuator maximum thrust output does not exceed the values in table 5.

Table 5. GX 3-Way Electric Actuator Maximum Allowable Thrust

VALVE SIZE

STEM DIAMETER

TRAVEL

STEM MATERIAL

MAXIMUM THRUST

FOR ACTUATOR TRAVEL UP AND DOWN

mm

mm

N

lbf

DN25-DN40

(NPS 1 to 1-1/2)

10

19

316L SST

6900

1550

DN50 (NPS 2)

14

19

316L SST

14000

3150

DN80-DN100

(NPS 3 to 4)

14

38

316L SST

14000

3150

Valve Trim Maintenance

Key numbers in this section refer to figures 9 and 10. Reference the flow direction nameplate (figure 5) to determine
side‐port common (unbalanced) or bottom‐port common (balanced) trim style.

Figure 5. Fisher GX 3‐Way Flow Direction Nameplate

GE34806-B

BOTTOM‐PORT COMMON - DIVERGING

SIDE‐PORT COMMON - DIVERGING

GE34804-B

SIDE‐PORT COMMON - CONVERGING

GE34805-B

BOTTOM‐PORT COMMON - CONVERGING

GE34807-B

Side‐Port Common and Bottom‐Port Common Trim Disassembly

1. Remove the actuator and bonnet assembly as described in the Replacing Packing section (steps 1 through 10).

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Содержание GX 3-Way

Страница 1: ...arts information for the Fisher GX 3 Way control valve and actuator system Do not install operate or maintain a GX 3 Way valve without being fully trained and qualified in valve actuator and accessory...

Страница 2: ...tion Phone 1 641 754 3771 or 1 800 338 8158 E mail education emerson com emerson com fishervalvetraining Valve Installation WARNING Always wear protective gloves clothing and eyewear when performing a...

Страница 3: ...result in uneven trim wear and improper operation With some valves the actuator may also need to be supported when it is not vertical For more information consult your Emerson sales office or Local Bu...

Страница 4: ...ions in this manual to ensure safe removal of the actuator from the valve D Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment D The valve packin...

Страница 5: ...225 6 19 21 2 750 10 19 21 3 4 750 10 38 40 Table 3 Body Nut Key 7 Torque Requirements VALVE SIZE TORQUE NSm lbfSft DN 25 and 40 NPS 1 and 1 1 2 79 8 58 9 DN 50 NPS 2 163 120 DN 80 and 100 NPS 3 and 4...

Страница 6: ...air supply to the lower diaphragm casing as shown in figure 11 WARNING To avoid personal injury or property damage due to actuator springs key 12 being under compression remove the long cap screws key...

Страница 7: ...the diaphragm key 10 on the diaphragm plate key 11 Insert the cap screw key 14 through the actuator spacer key 13 and place this assembly through the diaphragm diaphragm plate assembly 2 Place the dia...

Страница 8: ...it lays flat and not off balance Note If converting from fail down to fail up action first move the vent cap key 21 from the top of the casing see figure 8 and thread into the air supply connection on...

Страница 9: ...g at the inside of the stem connector halves the flats are down and the beveled surfaces are up 15 Align the pointer of the travel indicator key 26 with the appropriate mark on the travel scale 16 Tig...

Страница 10: ...as shown in figure 8 a Connect a separate air supply to the air supply connection on the upper casing shown in figure 8 and apply sufficient air pressure to move the plug stem to mid travel b Remove...

Страница 11: ...king box leakage or damage the new packing 13 Inspect the valve stem threads and packing box surfaces for any sharp edges that might cut the packing Scratches or burrs could cause packing box leakage...

Страница 12: ...rod until it contacts the lower stem connector key 27 or stem extension key 106 figure 12 and install the stem connector halves and travel indicator keys 23 24 and 26 with the cap screws key 25 Insta...

Страница 13: ...sion key 105 to the valve body key 1 Loosen these nuts approximately 3mm 1 8 inch It is not necessary to loosen the nuts which attach the actuator yoke key 8 to the yoke extension 8 Then loosen the va...

Страница 14: ...all the new packing and the metal packing box parts according to figure 7 for ENVIRO SEAL PTFE packing and according to figure 7 for ENVIRO SEAL graphite ULF packing Place a smooth edged pipe over the...

Страница 15: ...the electric actuator maximum thrust output does not exceed the values in table 5 Table 5 GX 3 Way Electric Actuator Maximum Allowable Thrust VALVE SIZE STEM DIAMETER TRAVEL STEM MATERIAL MAXIMUM THRU...

Страница 16: ...en applying torque Tilting the gun and socket while applying torque may cause the lugs on the seat ring or cage tool to suddenly disengage from the lugs on the seat ring or cage thus causing possible...

Страница 17: ...e on the cage see figure 10 Apply a general purpose silicone based lubricant 4 Before installing a new cage thoroughly clean the threads in the valve body Apply a suitable lubricant to the threads and...

Страница 18: ...e slowly as this will seat the seal ring to the plug Make sure the seal ring key 37 or backup ring key 38 does not become disengaged from the cage groove 7 To insert the plug stem assembly key 3 into...

Страница 19: ...0022 RGX750X0032 Bottom Port Common Seal Kits BOTTOM PORT COMMON SEAL KITS 1 Valve Size DN 25 NPS 1 DN 40 NPS 1 1 2 DN 50 NPS 2 DN 80 and 100 NPS 3 and 4 Nitrile Contains keys 37 and 38 RGX3WAYX012 RG...

Страница 20: ...meplate 36 Warning Label Key Description 37 Seal Ring see bottom port common seal kits table 38 Backup Ring see bottom port common seal kits table 42 ENVIRO SEAL Packing Set see packing kits table 43...

Страница 21: ...Instruction Manual D103312X012 GX 3 Way Valve and Actuator July 2017 21 Figure 7 Fisher GX 3 Way Packing GE37477_PACK ENVIRO SEAL PTFE PACKING ENVIRO SEAL GRAPHITE ULF PACKING GE37477_ULF...

Страница 22: ...103312X012 GX 3 Way Valve and Actuator July 2017 22 Figure 8 Fisher GX 3 Way Control Valve and Actuator System Assembly Fail Up Side Port Common GE35775 D SIDE PORT COMMON AIR SUPPLY CONNECTION APPLY...

Страница 23: ...GX 3 Way Valve and Actuator July 2017 23 Figure 9 Fisher GX 3 Way Side Port Common Trim Construction SIDE PORT COMMON GE37477_SP_TRIM Figure 10 Fisher GX 3 Way Bottom Port Common Trim Construction BOT...

Страница 24: ...312X012 GX 3 Way Valve and Actuator July 2017 24 Figure 11 Fisher GX 3 Way Control Valve and Actuator System Assembly Fail Down Bottom Port Common GE35776 d AIR SUPPLY CONNECTION BOTTOM PORT COMMON AP...

Страница 25: ...2 GX 3 Way Valve and Actuator July 2017 25 Figure 12 Fisher GX 3 Way High Temperature Control Valve and Actuator System Assembly Fail Up Side Port Common GE49204 C AIR SUPPLY CONNECTION SIDE PORT COMM...

Страница 26: ...Instruction Manual D103312X012 GX 3 Way Valve and Actuator July 2017 26 Figure 13 Fisher GX 3 Way Electric Actuator Mounting GG12175 A...

Страница 27: ...Instruction Manual D103312X012 GX 3 Way Valve and Actuator July 2017 27...

Страница 28: ...available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice E 2008 2017 Fisher Controls International LLC All rights res...

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