PFMM-WFI-99 - Pure-Flo

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For models with switch options or a potentiometer, an adjustment is required if the Hot Lock Out lower cover is repositioned in the field (Conduit rotated 90 degrees from factory setting). Fully close the valve, remove the plastic cap, handwheel, upper cover and bushing o-ring. Remove the screws holding the circuit board to the lower cover, lift the circuit board out of the way. Loosen the hub set screw and lift the hub up off the bushing using care not to disturb the potentiometer gear position. Lift up the lower cover, rotate 90° to the new position, line up the 2 pins and cored holes between the bonnet/lower cover and press down. Slide the hub over the bushing with the set screw lined up with the counterbore, pull the pawl out of the way, press down and lock up the set screw with a 0.005" gap between the hub and shim. Position the circuit board and tighten the screws. Replace the o-ring, upper cover, handwheel and plastic cap. 2.0 OPERATION AND ADJUSTMENT 2.1 General The valve is closed with a clockwise rotation of the handwheel. See Table 2 for stroke length and number of turns information. 2.2 SEALED BONNET (Fig. 2) When the process fluid is a hazardous or corrosive material, extra precautions should be taken. The user should be prepared to control an external leak or spill of the process when using the v-notch vent plug (see description below). In addition, the bonnet internals and seals should be constructed of materials suitable for exposure to the process fluid or gas. If in doubt, contact ITT Industries for evaluation. The sealed bonnet functions in the same manner as the standard bonnet. However, the sealed bonnet is equipped with o-ring seals which prevent external leakage in the event of a diaphragm failure. The sealed bonnet is equipped with a special “v-notch” vent plug which permits safe inspection for diaphragm rupture. Simply loosen the v-notch vent plug 2-3 turns. Fluid seepage indicates a diaphragm failure has occurred. Replace diaphragm immediately. Failure to follow these instructions could result in serious personal injury or death, and property damage. 4 2.2 CHAPEAU SCELLE (fig. 2) Lorsque le fluide de traitement est dangereux ou corrosif, prendre des précautions supplémentaires. En cas de fuite ou d’écoulement vers l’extérieur, l’utilisateur doit être prêt à prendre les mesures qui s’imposent si un bouchon de purge muni d’une encoche en V (voir description cidessous) a été installé. Les parties internes du chapeau et les joints doivent être en matériaux résistant aux fluides ou gaz de traitement. En cas de doute, demander conseil à ITT Industries. Le chapeau scellé fonctionne tout comme le chapeau standard. Toutefois, le chapeau scellé est équipé de joints toriques qui empêchent toute fuite vers l’extérieur en cas de défaillance du diaphragme. Le chapeau scellé est muni d’un bouchon de purge spécial avec encoche en V qui permet d’inspecter en toute sécurité l’état d’usure du diaphragme. Pour ce faire, il suffit de desserrer de 2 à 3 tours le bouchon de purge avec encoche en V. Un suintement de fluide indique une défaillance du diaphragme. Dans ce cas, remplacer immédiatement le diaphragme. L’inobservation de ces instructions pourrait résulter en blessures graves ou la mort, ainsi qu’en dommages matériels. 2.3 TRAVEL STOP The purpose of the travel stop is to prevent over closing of the valve, thus prolonging diaphragm life. The travel stop is set at the factory and should not require further adjustment; however, if adjustment is necessary, the following procedure should be followed: The first (and preferred) option is to install the valve in a test fixture (Figure 4). Supply air pressure equal to the system operating pressure to one side of the valve. Cap the other side of the valve and install a venting rubber or plastic tube. Hold the tube in a container of water. Air bubbles indicate leakage. Tighten the valve until the leakage stops. Adjust the travel stop nut tight against the spacer. 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 équipés d’un 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. If a test fixture is not available, the following procedure may be used: FOR ELASTOMER DIAPHRAGMS ONLY: 1. Remove pressure from the line containing the valve. 2. Remove bonnet bolts and nuts. Remove the bonnet and unscrew the diaphragm from the compressor. 3. Replace the bonnet on the valve body (without a diaphragm). 4. Replace two bonnet bolts and nuts on opposite sides of the bonnet, hand tight. 5. Turn the handwheel until the compressor touches the weir. The valve will not close further. 6. Screw the travel stop nut down until it seats on the spacer. The travel stop is now adjusted. 7. Remove the bonnet from the valve body. Screw a diaphragm into the compressor hand tight. Then back it off until the bolt holes in the diaphragm and bonnet flange register. 8. Rotate the handwheel counterclockwise just enough to permit flange area of diaphragm to rest flat against flange area of bonnet. 9. Replace the bonnet, which now includes the diaphragm, on the valve body. The bonnet should be opened one-half to one turn of the handwheel. Tighten the bonnet nuts in accordance with Section 1.0.2. If a test fixture is not available for valves with PTFE diaphragms, use the following procedure: 1. Loosen the travel stop nut. 2. Turn handwheel clockwise until the initial resistance of the diaphragm seating is felt. From this point, turn the handwheel another 5/8 turn. 3. Turn the travel stop nut down until it bottoms on the spacer. 3.0 MAINTENANCE 3.1 Periodically inspect condition of external valve parts. Replace all parts showing excessive wear or corrosion. On sealed bonnet valves, back off the v-notch vent plug 2 or 3 turns. When the process fluid is hazardous or corrosive, extra precautions should be taken. The user should employ appropriate safety devices and should be prepared to control a leak of the process fluid. Fluid 5 seeping from the plug indicates a diaphragm failure. Replace diaphragm immediately. Failure to follow these instructions could result in serious personal injury or death, and property damage. Lorsque le fluide de traitement est dangereux ou corrosif, prendre des précautions supplémentaires. L’utilisateur doit utiliser des dispositifs de sécurité appropriés et être prêt à prendre les mesures qui s’imposent en cas de fuite ou d’écoulement vers l’extérieur. Un suintement de fluide autour du bouchon indique une défaillance du diaphragme qu’il faut alors remplacer immédiatement. L’inobservation de ces instructions risque de provoquer des blessures graves ou la mort, ainsi que des dommages. 3.2 If body-diaphragm seating area leaks, depressurize system and open valve slightly. Tighten bonnet nuts as described in Section 1.0.2. If leakage continues, diaphragm replacement is required. 3.3 If leakage is occurring around the handwheel, spindle, or through a bonnet weep hole, the diaphragm is ruptured and must be replaced. 3.4 DIAPHRAGM REPLACEMENT: 1. Remove pressure from line containing the valve. Rotate handwheel clockwise to just close valve. 2. Remove bonnet nuts. 3. Lift off bonnet and unscrew diaphragm from compressor by turning counterclockwise. 4. Replacement diaphragm should be identical size and grade as original diaphragm. See Figure 3 for location of size and grade marking. Thread new diaphragm into compressor hand tight, then back off until bolt holes in diaphragm register with bolt holes in bonnet flange. NOTE: For PTFE plastic diaphragms, remove elastomer backing cushion with plastic diaphragm. Replace elastomer backing cushion with each new plastic diaphragm. PTFE diaphragms are molded in the closed position, but should be inverted to the open position prior to installation to ensure complete (correct) thread engagement. To invert, press with thumbs at center bottom of diaphragm while retaining with fingers at the diaphragm edge. This is also acceptable for the elastomer diaphragm. 5. Rotate handwheel counterclockwise just enough to permit flange area of diaphragm to rest flat against flange area of bonnet. 6. Replace valve bonnet on body and tighten bonnet nuts hand tight. 7. Close valve fully by rotating handwheel clockwise; then back off one-half to one full turn of handwheel. Tighten bonnet nuts evenly with a wrench (in accordance with Section 1.0.2).
Page 1 and 2: PURE-FLO ® WFI Hot Lock Out Bonnet
Page 3: TECHNICAL/SERVICE MANUAL 1.0 INSTAL
Page 7 and 8: Environmental Conditions (all model
Page 9 and 10: FIGURE 3 FIGURE 4 9
Page 11 and 12: FIGURE 6 11

PFMM-WFI-99 - Pure-Flo

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