PFMM-WFI-99 - Pure-Flo

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8. Open valve and check bonnet nuts to ensure they are evenly tightened. 9. If diaphragm leaks at body/bonnet joint after reaching temperature and pressure, depressurize system and re-tighten nuts in accordance with Section 1.0.2. 3.5 LUBRICATION CAUTION! Standard lubricant is Chevron Poly FM2. Contact ITT Industries for evaluation of nonstandard lubricants. ATTENTION ! Utiliser le lubrifiant standard Chevron Poly FM2. Pour obtenir une évaluation des lubrifiants non standard, contacter ITT Industries. 3.5.1 Bonnets are not equipped with grease fittings and must be disassembled to be lubricated. Under normal operations, lubrication is not necessary. 3.5.2 Where valves are exposed to corrosive atmospheres or weather conditions, contacting surfaces of the handwheel and bonnet shell should be lubricated. 3.6 O-RING REPLACEMENT (Fig. 2) CAUTION! Do not attempt to close the valve when the bonnet is removed from the body and the travel stop nut is not in position for models with a potentiometer gear. Potential damage to the potentiometer may result. ATTENTION ! Sur les modèles avec engrenage pour potentiomètre, ne pas essayer de fermer la vanne si le chapeau du boîtier a été enlevé et l’écrou limiteur de course n’est pas en place, car le potentiomètre risquerait d’être endommagé. 1. Remove bonnet nuts and lift the bonnet from the body. Remove clear plastic cap and travel stop nut. 2. Loosen handwheel set screw and remove handwheel from bushing. 3. Unthread the upper cover. Remove o-ring from bushing. 4. If the unit has a potentiometer, mark the hub/potentiometer gears to maintain alignment during reassembly. Use care not to cause the potentiometer gear to rotate, loosen set screw in hub, lift hub from bushing. 6 5. Remove diaphragm/spindle/bushing assembly by withdrawing through bottom of bonnet. Remove the lower cover from the bonnet by lifting straight up off the pins. Note the conduit location prior to removal. 6. Remove o-ring from grooves in bushing outside diameter. 7. Unscrew diaphragm/spindle assembly from handwheel bushing. 8. Remove o-ring from groove in spindle outside diameter. 9. Lubricate thrust bearing or washer in accordance with Section 3.5. Install on shoulder of bushing. 10. Select correct size o-rings (figure 2). Lubricate new o-rings in accordance with Section 3.5 and insert into grooves in bushing and spindle. Do not insert the bushing top o-ring. 11. Screw diaphragm/spindle assembly into bushing. 12. Install diaphragm/spindle/bushing assembly into bonnet and lower cover. Slide the hub and shim washer down the bushing with the set screw in line with the counterbore for the handwheel set screw. Establish a 0.005" clearance between the bottom of hub and shim resting on lower cover boss and lock in place. If the unit has a potentiometer, be sure the hub/potentiometer gear marks align. Assemble the bushing top o-ring and lubricate. Thread on the upper cover. 13. Verify shim washer is installed. Install handwheel and tighten set screw, ensuring end of set screw engages hole in bushing. 14. Screw cap with o-ring onto bushing hand tight. 3.7 CHANGE DIAPHRAGM TYPE To change from an elastomer diaphragm to PTFE, the compressor must be changed, and a tube nut must be installed. 1. Follow procedure 3.6, steps 1-5. 2. Drive out the spring pin which retains the compressor. 3. Install tube nut into hexagonal hole in new compressor. Locate the new compressor on the spindle and drive in the spring pin. To change from a PTFE diaphragm to elastomer, the compressor must be changed. The procedure is the same as above, except a tube nut is not required.
Environmental Conditions (all models) Temperature: 32–120° F (0–49° C) Relative Humidity: 80% @ 120° F (49° C) Altitude: 6562 ft. (2000 m) Pollution Degree 2 Installation Category II Continuous Operation Class II Equipment Model LBA: Fuse on PCB is not replaceable. Rated: 125V .125A Ratings Outputs LBA: 115VAC +/- 10% @ 60 HZ, 7.5 W n/a LBD: 24 VDC +/- 10%, 5W n/a LBD1: 24 VDC +/- 10%, 5W .50" (1-10 VDC), .75" (1-15 VDC), 1" (1-20 VDC) LBM: 24 VDC +/- 10%, 5W 5A @ 30 VDC or 250 VAC LBP: 24 VDC +/- 10%, 10W 200 mA @ 50 VDC Approvals LBA: NEMA 4X, IP 65, CSA-NRTL/C LBD: NEMA 4X, IP 65, CSA-NRTL/C, CE LBD1: NEMA 4X, IP 65, CSA-NRTL/C, CE LBM: NEMA 4X, IP 65, CSA-NRTL/C, CE LBP: NEMA 4X, IP 65, CSA-NRTL/C, CE Size Bonnet Bolt Torque in-lbs (N-m) 1/2" - DN 15 50 (5.5) 3/4" - DN 20 60 (6.7) 1" - DN 25 100 (11.1) TABLE 1 Note: Torque may be exceeded by up to 10%. SIZE STEM NO. OF TRAVEL TURNS 1/2" - DN 15 .25" (6.4mm) 2 3/4" - DN 20 .38" (9.5mm) 3 1" - DN 25 .50" (13.0mm) 4 TABLE 2 7
Page 1 and 2: PURE-FLO ® WFI Hot Lock Out Bonnet
Page 3 and 4: TECHNICAL/SERVICE MANUAL 1.0 INSTAL
Page 5: ATTENTION ! Sur les modèles équip
Page 9 and 10: FIGURE 3 FIGURE 4 9
Page 11 and 12: FIGURE 6 11

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