Smith PD Rotary Vane Meters F4 PRIME Cover Field Retrofit Procedure Service Bulletin

Transcription

1 Smith PD Rotary Vane Meters F4 PRIME Cover Field Retrofit Procedure Service Bulletin Issue/Rev. 0.1 (11/02) Bulletin SV01009 Tools and Parts Required P/N , Parts kit for F4 PRIME retrofit P/N , Tool kit for F4 PRIME retrofit Phillips head screw driver, No. 0, 1 or /8 inch open end wrench 3/16 inch hex key wrench 13/16 inch wrench or socket and ratchet 15/16 inch wrench Vise Grip, locking pliers with 1" straight jaws. Adjustable tongue and groove pliers with 1" to 2" jaws. External snap ring pliers with a straight tip for 3/8 inch diameter shaft. External snap ring pliers with a straight or angled tip for 7/8 inch diameter shaft. Disassembly 1. Isolate flow, relieve internal pressure and drain product from meter. 2. Turn off power to junction box 3. Remove junction box cover and disconnect wires from terminal strip. Figure 3 Figure 1 Parts Kit P/N Figure 4 Figure 2 Tool Kit P/N Separate union connection between sensor housing and junction box, (1-5/8 hex nut) (Figure 3). 5. Loosen (20) 9/16 hex head bolts in meter cover (13/16 hex), and remove cover (Figure 4). 6. At this stage it is recommended that the cover be transported to a work area that is equipped with a work table and bench vise. 7. Place cover on a work table with the flange face down. The Most Trusted Name In Measurement

2 Figure 5 Figure 8 Figure 6 Figure 9 Figure 7 8. Loosen and remove (2) hex socket head screws from the sensor assembly (Figure 5). 9. Remove sensor assembly (Figure 6). 10. Remove 1/4 NPT pipe plug (Figure 7). 11. Turn the cover over so that the dished side is facing up. This will provide access to the exciter gear assembly. Figure Remove retaining ring securing the link shaft (Figure 8). 13. Remove link shaft (Figure 9). 14. Remove retaining ring securing the exciter gear (Figure 10). 15. Remove exciter gear (Figure 11). Page 2 SV01009 Issue/Rev. 0.1 (11/02)

3 18. Place the tip of the Exciter Shaft Removal Tool, into the 1/4 NPT hole and drive out the exciter shaft (Figure 13). 19. Position and clamp the cover in a bench vise in order to gain access to the exciter gear guard post, located inside the dished head. Take precautions not to nick the flange face if clamping the vise jaws on the flange. Figure 11 Figure 14 Figure At the factory Loctite retaining compound was applied to the exciter shaft prior to being pressed in. It is recommended that the shaft be heated in order to melt the Loctite and loosen the bond. A propane torch works well for this. Do not heat the shaft to a point that is becomes red hot. Doing so, could result in warping the cover. Only apply heat until the Loctite melts at which point it will start to smoke (Figure 12). 17. Turn cover over, flange face down on the work table. Figure Use the Guide Post Removal Tool to remove both guide post. To do this, insert the drilled end of the tool onto a guide post. Work the tool back and forth to loosen the press fit (Figure 14). Use pliers or Vise Grips to pull out the guide post (Figure 15). 21. At this point, disassembly is complete. The cover is ready to be retrofitted. All components removed during disassembly should be discarded. The repair kit, provided by FMC Measurement Solutions, contains all new replacement components. Figure 13 Issue/Rev. 0.1 (11/02) SV01009 Page 3

4 Reassembly 1. Position the cover on the work table with its dished side facing up. Locate the exciter gear shaft and the 3/4 diameter x.010 thick shim washer provided in the parts kit. Note that the replacement exciter shaft is 1-5/8 inch long, which is approximately 3/8 inch longer than the one that was just removed. Inspect the face of the boss where the new shaft is to be installed. The original shim washer may still be bonded to the boss face. If so, remove it and clean the face with light sandpaper or a wire brush. Apply Loctite Primer to the shaft bore (Figure 16). Slide the replacement shim washer over the small diameter on the shaft (Figure 17). Important, shim washer must be used. Apply a few drops of Loctite 609 to the shaft's small diameter (Figure 18). Using the Exciter Shaft Driving Tool, drive the new shaft into the boss until the shoulder is seated flush against the boss face (Figure 19). Wipe away excess Loctite with a clean cloth. Figure 19 Figure 16 Figure 17 Figure Install the replacement exciter gear onto the shaft. The replacement gear can be identified by the six lightening holes located in its face (Figure 20). 3. Over the end of the exciter shaft and inside the exciter coupling counter bore, install one 5/8 diameter thrust washer (Figure 21), then a wave spring (Figure 22), followed by another 5/8 diameter thrust washer (Figure 23). The wave spring ends up sandwiched between the two thrust washers. Secure this assembly with the 3/8 diameter retaining ring. Use external snap ring pliers with straight tips to install this retaining ring (Figure 24). Figure 18 Figure 21 Page 4 SV01009 Issue/Rev. 0.1 (11/02)

5 Figure 22 Figure 25 Figure 23 Figure Turn the cover over, flange face resting on the work table. Locate the sensor assembly and 13/ 16 diameter O-ring supplied with the repair kit. Slide the O-ring over the end of the sensor body. Install the sensor into the cover. Radially position the sensor so that when the covers nameplate bracket is on your near side and the pipe plug on the far side, the caution label on the sensor faces to the right. Install socket head screws and tighten (Figure 27). Figure Spin the target gear. There will a minimal torque required to spin the gear but it should not bind or seize. 5. Assemble the link shaft to the gear coupling and secure it with the 7/8 diameter retaining ring. Note that, the large diameter of the link shaft should be positioned inside the coupling counter bore (Figures 25 and 26). Figure 27 Issue/Rev. 0.1 (11/02) SV01009 Page 5

6 7. Install the 1/4 NPT pipe plug. 8. Locate the 3/4 NPT conduit union in the repair kit. Separate the union at the flange joint. Feed the sensor wires through the female half, screw it onto the male end of the sensor housing and tighten. The male half of the coupling will not be needed if one is installed in the junction box at the meter site (Figure 28). Figure 30 Figure 28 Figure Locate the caution label and seal wire supplied with the repair kit. Wrap the caution tag around the sensor body just below the male pipe threads. Rotate it so that the pipe plug is covered by the tag. Thread the seal wire through the sensor screw heads and holes in the tag. Thread the end of the wire through the seal, pull out the slack and crimp the seal (Figures 29 and 30). 10. At this point the cover is ready to be reinstalled onto the meter. Return the cover to the site of the meter. Replace the cover O-ring. Position the cover over the meter body. Align the dowel holes in the flanges between the cover and the body. Rotate the link shaft so that it will engage with the slot in the inner mechanism coupling. Lower the cover onto the meter. Separate the flanges just enough to look inside and check that the coupling and link shaft are engaged. Install cover bolts and tighten. 11. Feed sensor wires into junction box. Reconnect conduit union. Rewire terminal strip and replace junction box cover 12. Meter is now ready to be put back into service. Proving The method outlined to retrofit meters to the latest design requires the removal of the outer housing cover and not the innermech. As such, the meter does not require re-proving since the innermech was not removed nor modified. The replacement of the exciter gear (with a light weight version) may change the drag on the innermech but this would not be in the normal flow range. Should the innermech be removed from the outer housing (removal of the cinch bolts) the meter should be reproved because of possible port misalignment and innermech body 'stress' changes. The only other reason a meter should require re-proving is because of 'site specific' regulations. Revisions included in SV01009 Issue/Rev. 0.1 (11/02): Page 4 : Added Proving information. The specifications contained herein are subject to change without notice and any user of said specifications should verify from the manufacturer that the specifications are currently in effect. Otherwise, the manufacturer assumes no responsibility for the use of specifications which may have been changed and are no longer in effect. Headquarters: 6677 North Gessner Road, Houston, TX USA, Phone: 713/ , Fax: 713/ Locations: Erie, PA USA Phone 814/ , Fax 814/ Corpus Christi, TX USA Phone 361/ , Fax 361/ Caldwell, TX USA Phone 979/ , Fax 979/ Longmont, CO USA Phone 303/ , Fax 303/ Los Angeles, CA USA Phone 661/ , Fax 661/ Eunice, LA USA Phone 337/ , Fax 337/ Thetford, England Phone (44) , Fax (44) Slough, England Phone (44) , Fax (44) Ellerbek, Germany Phone (49) , Fax (49) Visit our website at Printed in U.S.A. 10/02 FMC Measurement Solutions. All rights reserved. SV01009 Issue/Rev. 0.1 (11/02) Kongsberg, Norway Phone (47) 32/ , Fax (47) 32/ Barcelona, Spain Phone (34) 93/ , Fax (34) 93/ Moscow, Russia Phone (7) 095/ , Fax (7) 095/ Melbourne, Australia Phone (61) 3/ , Fax (61) 3/ Beijing, China Phone (86) 10/ , Fax (86) 10/ Chennai, India Phone (91) 44/ , Fax (91) 44/ San Juan, Puerto Rico Phone 787/ , Fax 787/ Caracas, Venezuela Phone (58) 212/ , Fax (58) 212/