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GE Oil & Gas

Figure 25 - Cross-section of the VariPak 28001

single-lever actuator and the
7700E positioner

Figure 26 - Partial cross-section of VariPak

28001 single-lever, air-to-open
valve

Содержание Masoneilan VariPak 28000 Series

Страница 1: ...GE Oil Gas 28000Series Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual ...

Страница 2: ...MENT AT THE SITE THESEINSTRUCTIONSDONOTPURPORTTOCOVERALLDETAILSORVARIATIONSINEQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION OPERATION OR MAINTENANCE SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER OPERATOR S PURPOSES THE MATTER SHOULD BE REFERRED TO GE THE RIGHTS OBLIGAT...

Страница 3: ... 10 3 3 Pneumatic and Electrical Circuit 11 3 4 Limit Switches 11 4 Calibration 12 4 1 Piston Rod Clevis Adjustment 12 4 2 Plug Stem Adjustment 12 4 3 Limit Stop Adjustment 13 4 4 Varipak 28002 Cv Adjustment 14 4 5 Positioner Start Up Pressure Adjustment 14 5 Maintenance 14 5 1 Actuator Diaphragm Removal 14 5 2 Adding Packing Ring 14 5 3 Disassembly 15 5 4 Reassembly 16 5 5 Packing Quick Change Me...

Страница 4: ... GE has a highly skilled After Sales Department to assist customers with start up maintenance and repair of valves and instruments Contact your nearest GE Sales Office or Representative or the After Sales Department at the Condé sur Noireau plant in France 1 3 TRAINING GE organizes regular training courses in the operation maintenance and application of its Masoneilan control valves and instrument...

Страница 5: ...tly be calibrated on site between 0 004 and 0 010 2 2 FLOW COEFFICIENT OF VARIPAK 28001 SINGLE LEVER AND 28002 ADJUSTABLE Cv VALVES 2 2 1 Plug seat ring combinations trim Eight plugs and five seat rings are used to make up the ten available plug and seat ring combinations identified by codes from 0 to 9 see figure 2 The shape of each plug and the port diameter of the seat ring can be used to match...

Страница 6: ...nation The plug and seat ring combination can be changed very easily for trim Nos 1 to 9 inclusive Simply replace the following parts The plug and seat ring see figures 1 and 2 to select the combination required for the new Cv The Cv adjustment plate 25 in the case of the VariPak 28002 adjustable Cv valve If necessary the actuator spring 134 see figure 3 to check the spring range corresponding to ...

Страница 7: ...e adjustment knob again firmly Note This operation entails moving lever No 2 either pneumatically by allowing air into the actuator or manually by pressing piston clevis 140b with a screwdriver or similar tool so that the slides of the two levers are perfectly parallel It may be necessary to reset the zero to calibrate the closure point after changing the Cv 2 3 ACTUATOR A single actuator allows V...

Страница 8: ...ew 116 Unhook spring 114 from spring clamp 115 2 5 1 VariPak 28001 single lever valve E Remove retainer clips 112b from pin 18 and remove the pin from lever 113 and plug clevis 104a Note This operation will be simplified by relieving the load exerted on the plug clevis by the conical compression spring 106 To do this push against the plug stem end with a screwdriver while driving out the pins F Re...

Страница 9: ...cover 110 using the two screws 109 If the valve is equipped with a handwheel refit the cover and turn the handwheel clockwise so that it engages in lever arm stop 122 Tighten cover screws 109 N Put the valve back into service Note When replacing an Air to Close actuator with an Air to Open actuator do not forget to neutralize the limit stop by screwing it down at the bottom of the piston When repl...

Страница 10: ...ned stainless steel All the line bolting required for installation can be supplied by GE on request Figure 7 VariPak flanged connection Connected by 25 mm flanges machined to standards ISO PN 20 50 and 100 ANSI 150 300 and 600 lb Fit gaskets compatible with service conditions between the valve body and the pipe flanges Figure 8 VariPak flanged body The VariPak valve body can be supplied on request...

Страница 11: ...Check that the supply pressure is that indicated on the serial plate 7700P or 7700E positioners can be installed on both VariPak 28001 single lever and VariPak 28002 adjustable Cv valves Figure 11 Connections with 7700P positioner Figure 12 Connections with 7700E positioner 3 4 Limit Switches Figure 13 In some cases limit switches can be provided for the VariPak valve on request These are wired an...

Страница 12: ...nst indicator Check that indicator 126 is correctly positioned Release air pressure 4 1 2 Adjusting the piston rod clevis on the Figure 14 Piston rod clevis 104b adjustment VariPak 28002 adjustable Cv valve Figures 14 and 27 This adjustment is only required if the piston 131 has been removed In this case it should be carried out during reassembly before coupling the levers 21 and 22 to the clevise...

Страница 13: ...e the air pressure after inserting the shim At this closing point where the plug is not tightened onto the seating the slides of levers No 1 and 2 should be perfectly parallel This characteristic makes it possible to change the adjustment knob 24 position later to obtain the required real Cv value B Loosen adjustment knob 24 and slide it along lever No 1 to the maximum Cv position on adjustment pl...

Страница 14: ... in the valve actuator or positioner before maintenance or disassembly 5 1 ACTUATOR DIAPHRAGM REMOVAL Figures 17 24 25 26 and 27 A Unscrew the two pressure connection nuts 138a and pull tubing 140 out Remove the four cap screws 139 and diaphragm cover 137 Remove the worn diaphragm Form new diaphragm 136 and fit it on the piston as shown in figure 17 Fit the diaphragm roll into the bracket groove T...

Страница 15: ...tely loosen locknut 117 and screw 116 Remove spring clamp 115 from lever No 2 and remove balance spring 114 from the positioner E Remove the retainer clip 112b from each of the two pins 184 and disengage the pins from lever No 1 and clevis 104a Note This operation will be simplified by relieving the load exerted on the plug clevis by the conical compression spring 106 To do this push against the p...

Страница 16: ...at ring 3e until the stem slides smoothly Fit spacer 5 turning it so that one of its holes is aligned with safety pin 11 hole in the valve body Note For valves with a maximum Cv less than 0 10 check that the retaining ring 182 is fitted on the plug before fitting the plug in the spacer 3f If the retaining ring is worn or damaged replace it Figure 19 Tightening the seat ring retainer 4 D Wind two l...

Страница 17: ...lever No 2 where spring clamp 115 is fitted is located above and in line with balance spring 114 I Fit adjustment pin 23 in the slide of lever No 1 and screw adjustment knob 24 on its threaded end Insert the smooth end of pin 23 into the groove in lever No 2 and place lever No 1 on support bracket 108 Couple lever No 1 to actuator bracket 108 using pin 105 and two retainer clips 112a Note Check th...

Страница 18: ...oved while the valve is still pressurized The internal parts of the valve cannot be removed unless the safety pin is removed first Remove the two packing flange nuts 8b and back off the two actuator bracket mounting nuts 8a as far as possible C Remove the actuator plug assembly from the valve body tapping it off with a block of wood and mallet if necessary Clean the packing box in the valve body R...

Страница 19: ...6 and its three O rings spring 158 and manifold block 144 Tighten the screws 141a refit tubing 140 and tighten pressure connection nuts 138a Note The ports in gasket 146 must be aligned with those in the positioner block 147 To ensure correct positioner performance check that all gaskets are perfectly leaktight I Hook spring clamp 115 to lever 22 or 113 In the case of VariPack 28001 valve see figu...

Страница 20: ...w parts Otherwise simply check that parts are in perfect condition before refitting Caution Handle the shims carefully 145 C If the parts mentioned above have been removed proceed as follows Fit the O ring 153 shims 145 pilot valve assembly 155 to 157 gasket 146 and the three O rings the spring 158 and manifold block 144 I P module 20 Tighten screws 141a refit tubing 140 and tighten pressure conne...

Страница 21: ...Δ 161 4 Washer c 1 Plug stem Cv max 1 2 0 6 122 1 Lever arm stop Δ 162 4 Nut d 1 Plug stemCv max 0 25 0 10 123 1 Cover plug Δ 163 4 Wire 13 a 1 Body Cv max 3 8 124 1 Pivot pin No 4 Δ 164 1 Terminal 13 b 1 Body Cv max 3 8 125 1 Locknut 165 2 Logo 18 1 Pivot pin No 3 22 108 126 1 Indicator 168 1 Cover washer 20 1 I P module 127 1 Indicator plate 170 2 Signal decal 21 1 Lever No 1 129 2 Indicator pla...

Страница 22: ...22 GE Oil Gas 180 181 Figure 25 Cross section of the VariPak 28001 single lever actuator and the 7700E positioner Figure 26 Partial cross section of VariPak 28001 single lever air to open valve ...

Страница 23: ...24 GE Oil Gas Figure 27 Partial cross section of VariPak 28002 adjustable Cv air to open valve Figure 29 Coupling detail of levers No 1 and 2 Figure 28 Partial top view 180 181 ...

Страница 24: ...stered trademarks or trademarks of their respective owners General Electric Company All rights reserved Visit our web site www fr eps com E P S FRANCE 24 bis rue de Picpus 75012 PARIS Tel 33 0 9 83 01 21 01 ventes fr eps com E P S CAMEROON Immeuble Carré d Or Rue Njo Njo Bonapriso DOUALA Tel 237 6 52 12 70 95 ventes fr eps com ...

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