DeZurik G Series Manual
Used on pec eccentric valves
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Also See for G Series:
- Instruction (19 pages) ,
- Manual (17 pages) ,
- Instructions manual (13 pages)
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Summary of Contents for DeZurik G Series
- Page 1 DEZURIK MANUAL G-SERIES ACTUATORS USED ON PEC ECCENTRIC VALVES D10063 Instruction August 2012 DeZURIK, Inc. Sartell, Minnesota USA | Phone: 320-259-2000 | www.dezurik.com | info@dezurik.com...
- Page 2 Recommended spare parts are listed on the assembly drawing. These parts should be stocked to minimize downtime. Order parts from your DeZURIK sales representative, or directly from DeZURIK. When ordering parts, please include the 7-digit part number and 4-digit revision number (example: 9999999R000) located on the data plate attached to the valve assembly.
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Page 3: Table Of Contents
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Table of Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 4: Description
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Description The manual operated G-Series actuator is designed to operate a PEC Eccentric valve. Integral stops limit actuator stroke for both the open and closed valve positions. This actuator is available in three sizes: Size 6, Size 12 and Size 16. -
Page 5: Operation
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Operation Rotating the operator (handwheel or chainwheel) clockwise closes the valve. To actuate the valve from full open to full closed (or vice-versa), the Size 6 requires 13 revolutions, the Size 12 requires 19 revolutions and the Size 16 requires 33 revolutions of the operator. -
Page 6: Stop Adjustments
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Stop Adjustments This actuator has a stop to limit valve stroke at each end of the cycle. The open position stop is an integral, non-adjustable stop in the actuator cover; the closed position stop is an adjustable stop screw located in the side of the actuator housing (Size 6 and Size 12) or in the end of the extension cap (Size 16). -
Page 7: Actuator Removal
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Stop Adjustments (continued) Direct Pressure - When the higher pressure is at the end opposite the seat. See Figure 2. Reverse Pressure - When the higher pressure is at the seat end of the valve. See Figure 2. -
Page 8: Non-Submerged Service Actuators
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Actuator Removal (Continued) 3. Scribe corresponding lines on the actuator housing and top cover so the cover can be reinstalled in the correct position. 4. Remove the screws attaching the top cover on the actuator and lift the cover from the housing. -
Page 9: Actuator Installation
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Actuator Removal (Continued) 4. Loosen lockscrew #1 about 6 to 8 turns. Loosen lockscrews #2 about 3 turns. See Figure 3. 5. Using a soft hammer, tap the heads of the #1 lockscrews to loosen the keys. -
Page 10: Non-Submerged Service Actuators
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Actuator Installation (Continued) Non-Submerged Service Actuators 1. Place the valve in the position it was in when the actuator was removed. Normally this will be so the plug is in the lowest position in the valve body. -
Page 11: Size 16 Actuators
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Recommended Spare Parts Replacement (Continued) 6. Slide the drive shaft (complete with operator) out of the actuator. 7. Reach into the housing and remove the worm gear, thrust bearing(s) and bearing races. The Size 6 actuator has one thrust bearing and two bearing races;... - Page 12 DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Recommended Spare Parts Replacement (Continued) 9. Remove the gear sector seals from the top cover and adaptor. 10. Scrape the gasket material from the top cover, actuator housing and drive shaft housing.
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Page 13: Changing Actuator Mounting Position
DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Changing Actuator Mounting Position On 4–20" (100–500mm) valves, the actuator can be mounted in 60° increments around the valve shaft. 90° or 270° position changes require changing the gear sector on Size 6 & Size 12 actuators or the timing between the gear sector and the rack on Size 16 actuators;... - Page 14 DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Changing Mounting Positions (Continued) 8. Make sure the plug is still touching the valve seat, then using the new gear, liberally grease the teeth and journals then drop the gear in over the plug hex making sure the edge of the gear is close to or will touch the stop screw.
- Page 15 DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Changing Mounting Positions (Continued) 9. Set a new cover gasket on the housing, then install and fasten the top cover on the housing; make sure the scribe marks line up. 10. Slide the pointer and wrenching nut down the plug stud so it rests on top of the gear sector;...
- Page 16 DeZURIK Manual G-Series Actuators on PEC Eccentric Valves Changing Mounting Positions (Continued) 12. Hold the keys in position and slide the wrenching nut over the plug stud, then guide the keys into the gear sector and stem slots. 13. Install the four screws fastening the wrenching nut to the gear sector.
- Page 17 If you use metric fasteners with ASME Class 150/300 bolt holes and flange bolt patterns, you do so at your sole risk and any liability associated with such use shall not be the responsibility of DeZURIK, Inc. In addition to the foregoing, DeZURIK’s Manufacturer’s Conditions apply.
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