Emerson pays the highest attention to collecting and verifying the documentation contained in this user manual. However Emerson is not liable for any mistakes contained in this manual, for damage or accidents due to the use of the latter. The information contained is of exclusive reserved ownership of Emerson and may be modified without prior notice.
The actuator pedestal has a flange with threaded holes to fix the actuator to the valve. Emerson can supply different types of control system following Customer’s requirements. The expected lifetime of actuator is approximately 25 years .
Section 1: General Warnings Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 GVO LP DA 250k Manual override Stroke (mm) Cylider diameter (mm) Max. allowable thrust (N) Double-Acting actuator Data sheet Supply fluid Air, Nitrogen or sweet gas Operating temperature Standard: from –30 °C to +100 °C Optional: from –60 °C to +140 °C...
The actuator should be handled with appropriate lifting means. The weight of the actuator is reported on the delivery bill. For a correct lifting procedure, please refer to following Figures. Figure 3 Lifting Points for Bettis GVO LP DA Actuators 1 = Lifting points (obligatory) Installation...
Section 2: Installation Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Figure 4 Positioning by chains and by slings Point of support Don’t lay the actuator on tie-rods of cylinder Don’t lay the actuator on accessories (manual handpump, manual jackscrew, pneumatic control group etc.) Storage If the actuator needs storage, before installation follow these steps: •...
Installation, Operation and Maintenance Manual Section 2: Installation VCIOM-15792-EN Rev. 0 October 2020 Actuator Assembly on the Valve 2.4.1 Types of Assembly The adapter pedestal in fabricated carbon steel is specifically designed for adaptation to any type of valve with provision for local indicator, limit switches and other accessories (on request).
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Section 2: Installation Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 To assemble the actuator onto the valve by bracket with threaded joint proceed as follows: Figure 5 Pedestal with threaded coupling joint Table 1. Parts list Item Description Stud bolt Support joint...
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Installation, Operation and Maintenance Manual Section 2: Installation VCIOM-15792-EN Rev. 0 October 2020 Check that the coupling dimensions of the valve flange and stem, or of the relevant extension, meet the actuator coupling dimensions (valve stem and flange). Lubricate the valve stem with grease in order to make the assembly easier. Connect a sling to the support point of the actuator and lift it.
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Section 2: Installation Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 To assemble the actuator onto the valve by bracket with shell joint, perform the following operations: Figure 6 Pedestal with shell coupling joint Table 2. Parts list Item Description Stud bolt...
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Installation, Operation and Maintenance Manual Section 2: Installation VCIOM-15792-EN Rev. 0 October 2020 Check that the coupling dimensions of the valve flange and stem, or of the relevant extension, meet the actuator coupling dimensions (valve stem and flange). Lubricate the valve stem with grease in order to make the assembly easier. To make easier the assembly, the valve stem has to be in perfect vertical position.
Section 2: Installation Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Pneumatic Connections WARNING Check that the values of pneumatic supply available are compatible with those reported on the identification plate of the actuator. NOTICE The connections should be made by qualified staff. Use pipes and connections appropriate as for type, material and dimensions.
Installation, Operation and Maintenance Manual Section 2: Installation VCIOM-15792-EN Rev. 0 October 2020 Commissioning WARNING Installation, commissioning and maintenance and repair works should be made by qualified staff. Upon actuator commissioning please carry out the following checks: • Check that paint hasn't been damaged during transport, if necessary repair the damages to paint coat.
Section 3: Operation and Use Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Section 3: Operation and Use Operation Description The supply gas pressurizes the pneumatic-cylinder chamber relevant to the operation to carry out (opening or closing) (see following pages). This pressure starts the linear motion of the piston and the consequent motion of the valve stem that is coupled.
Installation, Operation and Maintenance Manual Section 3: Operation and Use VCIOM-15792-EN Rev. 0 October 2020 Figure 9 Double-Acting function with jackscrew manual override type MHP Residual Risks WARNING It is recommended to pipe exhaust gas. The actuator has parts under pressure. Use the due caution.
October 2020 VCIOM-15792-EN Rev. 0 Figure 10 Bettis GVO LP DA MHP without control system Pressurize the pneumatic-cylinder chamber, this pressure starts the linear motion of the piston and the consequent motion of the valve stem that is coupled. The valve is actuated in opening and in closing position by the actuator pneumatic cylinder in one direction and by the spring unit in the other direction.
Installation, Operation and Maintenance Manual Section 3: Operation and Use VCIOM-15792-EN Rev. 0 October 2020 3.3.4 Emergency Manual Operation by MHP (when sufficient line pressure is not available) • Select by the valve 5-D the opening or closing operation. • Actuated the pump 5-P until to reach the complete operation.
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October 2020 VCIOM-15792-EN Rev. 0 For the adjustment in Bettis GVO LP DA with hydraulic manual override the mechanical stop is placed on the end flange of hydraulic cylinder, follow these steps (Figure 12): Remove with the specific wrench (c1) the plug (t).
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Installation, Operation and Maintenance Manual Section 3: Operation and Use VCIOM-15792-EN Rev. 0 October 2020 For the adjustment of the mechanical stop screwed on the end flange of manual override (see also Section 7.2, Table 14: sectional drawing for manual jackscrew MSJ) proceed as follows: Loosen the lock nut (item 2).
Section 3: Operation and Use Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Calibration of Micro-Switches (For Bettis Limit Switch Box*) WARNING *If different micro-switches assembly or limit switch box is supplied, please refer to the specific documentation. NOTICE Operate only the micro-switch corresponding to the direction of operation being carried out, as clearly reported on the micro-switch.
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Installation, Operation and Maintenance Manual Section 3: Operation and Use VCIOM-15792-EN Rev. 0 October 2020 Figure 15 Cam adjustment If the index (Figure 16), does not signal the proper position of the valve but is turned by 90°: • Remove the roll pin placed on the position indicator (index). •...
VCIOM-15792-EN Rev. 0 Calibration of the Operation Time The calibration of the operation time is made by Emerson according to customer requirements and to technical data-sheet included in technical documentation. If necessary it’s possible to modify or reset the operating time through the flow regulation valve placed between the control valves enclosure and the pneumatic cylinder (Figure 17).
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VCIOM-15792-EN Rev. 0 October 2020 For Bettis GVO LP DA actuator models with Manual Handpump, the operating time is adjustable through two regulation valves placed on manual handpump body (see Section 7.2, Table 11, 12 and 13: sectional drawing for hydraulic control unit MHP).
Section 4: Operational Tests and Inspections Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Section 4: Operational Tests and Inspections NOTICE To ensure the guaranteed SIL grade, according to IEC 61508, the functionality of actuator must be checked with regular intervals of time, as described in the Safety Manual. Operational Tests and Inspections...
Installation, commissioning and maintenance and repair works should be carried out by qualified staff. Periodic Maintenance Bettis GVO LP DA actuators are designed to operate long-term in heavy-duty operating conditions, without maintenance needs. NOTICE Periodicity and regularity of inspections is particularly influenced by specific environmental and working conditions.
Section 5: Maintenance Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Figure 19 Level measuring stick Maximum level Minimum level 5.1.1 Check and Restore Oil Level in the Hydraulic Manual Handpump During the actuator operation, the oil tank has to be closed (not in connection with the atmosphere).
Section 5: Maintenance VCIOM-15792-EN Rev. 0 October 2020 NOTICE For refill use oil of the same brand as the one in the tanks. Table 5. Features of hydraulic oil used by Emerson Producer AGIP Name ARNICA 22 Viscosity at 40 °C 22 cSt Viscosity at 100 °C...
5.1.3 Lubrication of Actuator For normal duty the Bettis GVO LP DA actuator is lubricated "for life". In case of high load and high frequency of operation it may be necessary to periodically restore lubrication: it is advisable to apply a generous coating of grease on the contact surfaces of moving parts.
Installation, Operation and Maintenance Manual Section 5: Maintenance VCIOM-15792-EN Rev. 0 October 2020 Extraordinary Maintenance If there are leaks in the hydraulic cylinder, pneumatic cylinder or a malfunction in the mechanical components, or in case of scheduled preventive maintenance, the actuator must be disassembled and seals must be replaced with reference to the follow general sectional drawing and adopting the following procedures.
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Section 5: Maintenance Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Reassemble Carefully clean the inside of the tube (14) and check that the entire surface, particularly that of the bevels, is not damaged. Lubricate the inside surface of the tube and the bevels at the ends.
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Installation, Operation and Maintenance Manual Section 5: Maintenance VCIOM-15792-EN Rev. 0 October 2020 Figure 20 Bettis GVO LP DA with Threaded Coupling Joint Table 6. Parts List Item Description Item Description Piston Stud bolt End flange Support joint O-ring Connecting joint...
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Section 5: Maintenance Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Figure 21 Bettis GVO LP DA with Shell Coupling Joint Table 7. Parts List Item Description Item Description Stud bolt Screw Connecting device Piston Screw End flange...
Installation, Operation and Maintenance Manual Section 5: Maintenance VCIOM-15792-EN Rev. 0 October 2020 Dismantling and Demolition WARNING Before disassembling the actuator it is necessary to close the pneumatic supply line and discharge pressure from the cylinder of the actuator, from the control unit and from the accumulator tank, if present.
Actuator does not work Wrong position of the distributor of the Restore correct position hydraulic manual override Failure of the control system Call Emerson Customer Service Low supply pressure Restore (Section 1.4) Low supply pressure Restore (Section 1.4) Wrong calibration of flow regulator valves Restore (Section 3.6)
Section 7: Layouts Spare Parts Order For spare parts order to the relevant Emerson office please make reference to Emerson order confirmation concerning all the supply, and serial number of the actuator, refer to Section 1.2 for any specific spare part for a specific actuator model.
Section 7: Layouts Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Parts List for Maintenance and Replacing Procedure Figure 22 Pedestal with coupling joint Table 9. Parts list - Pedestal with coupling joint Item Description Material Pedestal Carbon steel Antirotation shaft Stainless steel Plate...
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Installation, Operation and Maintenance Manual Section 7: Layouts VCIOM-15792-EN Rev. 0 October 2020 Figure 23 Pneumatic cylinder Table 10. Parts list - Pneumatic Cylinder Item Description Material Head flange Carbon steel Washer Carbon steel+nitrile rubber Screw Alloy steel Cylinder tube Carbon steel Tie rod Alloy steel...
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Section 7: Layouts Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Figure 24 Hydraulic Cylinder for Manual Handpump Table 11. Parts list - Hydraulic cylinder for manual handpump Item Description Material Piston rod bushing Steel+bz+Teflon Head flange Carbon steel O-ring NBR * Piston rod seal ring...
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Installation, Operation and Maintenance Manual Section 7: Layouts VCIOM-15792-EN Rev. 0 October 2020 Figure 25 Hydraulic control unit Oil tank relief valve Relief valve for automatic operation Flow regulator Relief valve for manual operation Layouts...
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Section 7: Layouts Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Table 12. Parts list - 5/B hydraulic control unit Item Description Material Dipstick Cap nut Carbon steel Washer Carbon steel + rubber Hydraulic tank Carbon steel Handpump See attached table 0-ring Fluorosilicon rubber*...
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Installation, Operation and Maintenance Manual Section 7: Layouts VCIOM-15792-EN Rev. 0 October 2020 Item Description Material Flange Carbon steel O-ring Fluorosilicon rubber* Spring Spring steel Plug Stainless steel Retainer ring Carbon steel Spring pin Carbon steel Rivet Aluminium Operation instruction plate Stainless steel Screw Carbon steel...
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Section 7: Layouts Installation, Operation and Maintenance Manual October 2020 VCIOM-15792-EN Rev. 0 Figure 26 Hydraulic control unit - handpump Table 13. Parts list - Hydraulic control unit - handpump Item Description Material Ball Stainless steel Delivery valve bush Carbon steel Suction valve bush Carbon steel Spring...
Installation, Operation and Maintenance Manual Section 8: Date Report for Maintenance Operations VCIOM-15792-EN Rev. 0 October 2020 Section 8: Date Report for Maintenance Operations Last maintenance operation date: (in factory, on delivery): ……… exec. by : ………… ……… exec. by : ………… ………...