Welker Automatic Insertion Heated Regulator (IHRA–4SS) IOM
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Installation, Operation, and Maintenance Manual Welker® Automatic Insertion Heated Regulator High Voltage Model IHRA-4SS-220/230 The information in this manual has been carefully checked for accuracy and is intended to be used as a guide for the installation, operation, and maintenance of the Welker equipment described above. Correct operating and/or installation techniques, however, are the responsibility of the end user. Welker reserves the right to make changes to this and all products in order to improve performance and reliability. 13839 West Bellfort Sugar Land, TX 77498-1671 (281) 491-2331 - Office (800) 776-7267 - USA Only (281) 491-8344 - Fax http://www.welkereng.com © Copyright 2010, Welker, Inc. TABLE OF CONTENTS 1. GENERAL 1.1 1.2 1.3 1.4 INTRODUCTION PRODUCT DESCRIPTION SPECIFICATIONS SYSTEM DIAGRAM 2. 2.1 2.2 3. 3.1 3.2 3.3 3 3 3 4 4 INSTALLATION & OPERATION GENERAL INSTALLATION INSTRUCTIONS MAINTENANCE GENERAL RETRACTION DISASSEMBLY/MAINTENANCE 5 5 5 9 9 9 10 Welker®, Welker Jet®, and WelkerScope® are Registered Trademarks owned by Welker, Inc. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 2 of 16 SPECIFICATIONS 1. SPECIFICATIONS 1.1 INTRODUCTION We appreciate your business and your choice of Welker products. The installation, operation, and maintenance liability for this product becomes that of the purchaser at the time of receipt. Reading the applicable Installation, Operation, and Maintenance (IOM) Manual prior to installation and operation of this equipment is required for a full understanding of its application and performance prior to use.* If you have any questions, please call 1-800-776-7267 in the USA or 1-281-491-2331. Notes, Cautions, and Warnings Notes emphasize information or set it off from the surrounding text. Caution messages appear before procedures that, if not observed, could result in damage to equipment. Warnings are alerts to a specific procedure or practice that, if not followed correctly, could cause personal injury. *The following procedures have been written for use with standard Welker parts and equipment. Assemblies that have been modified may have additional requirements and specifications that are not listed in this manual.* 1.2 PRODUCT DESCRIPTION The Welker Automatic Insertion Heated Regulator (IHRA–4SS) is designed for use in systems where it is desirable to insert the regulator into and retract it from a pressurized line. Using four valves and an oil reservoir, the automatic insertion style allows the operator to safely control the movement of the IHRA-4SS into and out of the pipeline. The unit should always be mounted to a fully ported pipeline isolation valve with a minimum bore of 3/4". It is required that the oil reservoir be mounted in a vertical position. The preferred location for installation is in a straight section of inlet piping at a point before the flowing stream is subjected to turns and impingements, which can result in aerosols that may produce a sample that is not representative of the gas in the pipeline. The IHRA-4SS’s thermal fins are designed to offset the cooling brought on by the JouleThomson effect. Only one analytical instrument should be fed by the IHRA-4SS at a time; otherwise, the Joule-Thomson effect brought on by the pressure drop through the point of regulation will be greater than the heating effect brought on by the flowing pipeline gas. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 3 of 16 SPECIFICATIONS 1.3 SPECIFICATIONS The specifications listed in this section are generalized for this equipment. Welker can modify the equipment according to your company’s needs. However, please note that *the specifications may vary depending on the customization of your product. General Model number IHRA–4SS Description An automatic insertion device that incorporates a heated regulator and a vaporization probe Materials of construction Stainless steel Application Vaporization of sample stream Products sampled Natural gas, Natural Gas Liquids Pipeline Connection ¾” NPT, 1” NPT (Standard), 1 ½” NPT, or 1”-2” Flange Insertion Depth 18" (0.46 m) (Standard) others available Design temperature –20°F to 200°F (–28°C to 93°C) MAOP* 1” NPT 2160 PSIG 2”-600RF 1440 PSIG 2”-300RF 720 PSIG Figure 1 IHRA Refer to this figure throughout manual Model shown has flange connection and vertical mount IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 4 of 16 INSTALLATION & OPERATION 2. INSTALLATION & OPERATION INSTRUCTIONS 2.1 GENERAL      2.2 After unpacking the unit, check it for compliance and for any damages that may have occurred during shipment. Claims for damages caused during shipping must be initiated by the receiver and directed to the shipping carrier. Welker is not responsible for any damages caused from mishandling by the shipping company. When sealing fittings with PTFE tape, refer to the proper sealing instructions for the tape used. A sample probe should be located in the least turbulent area available of the flowing stream; i.e., not in a header or blow-down stack and away from obstructions, elbows or partially closed valves. The sample probe should be installed reaching approximately into the center one-third of the pipeline. The unit is shipped from the factory with the assumption that the installation will be vertical. In cases where the unit is mounted in the horizontal position, the user has to rotate the oil reservoir 90° and re-tube, so that the oil reservoir drain valve always faces downward. The internals of the reservoir have a downcomer that does not function if the oil reservoir is located in a horizontal position. For long insertion units, it is sometimes required to support the heated regulator body to protect the shaft from bending stresses. INSTALLATION INSTRUCTIONS 1. If the model you ordered did not include a relief valve and a gauge then you will need to install these in the appropriate ports (Figure 2). 1 1 /4” Outlet Port /4” Gauge Port 1 /4” Relief Port Figure 2 IHRA-4SS Ports for Valve and Gauge Installation 2. Determine the amount of insertion travel desired by measuring from the top of the pipeline isolation valve to the center one-third of the pipeline. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 5 of 16 INSTALLATION & OPERATION 3. Remove the lockdown bolt and washer. Loosen the stop collar (lock collar) and hex socket cap screw (Figure 3). Hex Socket Cap Screw Figure 3 Lock Collar Base Hex Head Bolt Lock Down Washer Lock Collar 4. With the IHRA-4SS fully retracted, move the lock collar on the shaft to the appropriate length. For example, if the insertion travel desired is 6", measure up 6" from the upper housing (top cap) and tighten the hex socket cap screw at that position. This limits the insertion travel to 6". 5. Install the IHRA-4SS onto the pipeline isolation valve. 6. In a counterclockwise direction, back off the adjusting screw on the regulator subassembly (Figure 4) so that the IHRA-4SS is closed (i.e., no setting or tension on the spring). Spring Housing Adjusting Screw Spring Jam Nut Figure 4 Adjusting Screw on Regulator Sub-assembly Detail Do not use the oil reservoir as a leverage grip to rotate the unit on the valve. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 6 of 16 INSTALLATION & OPERATION 7. Make sure that all Oil Reservoir valves are closed on Valve C the oil reservoir Valve D (Figure 5). Valve B 8. Make sure to close the outlet port valve on the Valve A IHRA-4SS (Figure 5). 9. Slowly open the pipeline isolation valve and visually check for Lower Housing external leaks. Locate Figure 5 and fix any leaks. 10. Check the IHRA-4SS's outlet gauge. The gauge should read 0 psi. If the gauge does not read 0 psi, check the IHRA-4SS for internal leaking. 11. Slowly open valve C, at the bottom of the oil reservoir, and valve D, at the bottom of the lower housing, to allow pipeline pressure to enter the reservoir The IHRA-4SS is shipped from the factory with the necessary oil volume. If additional oil is needed, the unit should be fully retracted prior to adding it. Remove valve B and add oil, filling the reservoir just below the top of the tube that is connected to the port at valve C. Then replace valve B. 12. Slowly open valve A between the reservoir and the top cap of the insertion unit. This allows the probe to descend or insert into the pipeline until the lock collar stops at the top cap. 13. Align the lock collar so that it fits over the stand-off, and then replace the lockdown bolt and washer. 14. Close valve A and visually check for external leaks. Locate and fix any leaks. 15. With the customer-supplied electric power turned off, connect the 220/230 VAC leads to terminals 2 and 4 in the connection box provided (Figure 6). Figure 6 220/230 VAC IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 7 of 16 INSTALLATION & OPERATION 16. Set the adjustment on the electrical controller to the desired temperature. 17. Secure the cover to the electrical box and cable gland. 18. Connect tubing from outlet valve of IHRA-4SS to the instrument. 19. Loosen the jam nut on the adjusting screw (Figure 7). Spring Housing Adjusting Screw Spring Figure 7 Adjusting Screw on Regulator Subassembly Detail Jam Nut 20. In a clockwise direction, screw down on the adjusting screw to set the desired outlet pressure. Use a wrench to tighten the jam nut. 21. Refer to the Relief Valve IOM to set the relief valve. 22. Visually check the entire system for external leaks. Locate and fix any leaks. 23. Turn on the electric power to begin operation of the IHRA-4SS. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 8 of 16 MAINTENANCE 3. MAINTENANCE 3.1 GENERAL Prior to maintenance or disassembly of the unit, it is advisable to have a repair kit handy for the system in case of unexpected wear or faulty seals. All maintenance and cleaning of the unit should be done on a smooth, clean surface. We recommend that the unit have annual maintenance under normal operating conditions. In the case of severe service, dirty conditions, excessive cycling usage, or other unique applications that may subject the equipment to unpredictable circumstances, a more frequent maintenance schedule may be appropriate. New seals supplied in spare parts kits are not lubricated. They should be lightly coated with lubrication grease (silicone grease or other) before they are installed into the equipment. This helps in the installation of the seals while reducing the risk of damage when positioning them on the parts. After the seals are installed, some additional lubrication can be applied to shafts or cylinder inner diameters to allow smooth transition of parts. Recommended Tools It would be advisable to have the following tools available for maintenance of the unit; however, tools used will vary depending on probe model.     3.2 Small Hex Key Set 6" Adjustable Wrench 10" Adjustable Wrench 7 /16" Combination Wrench RETRACTION To retract the IHRA, complete the following steps: If the IHRA-4SS is being withdrawn to "pig" the pipeline, follow the Section 3.2, Retraction through Step 5. 1. Turn off the electrical power, and disconnect the electrical wiring. 2. Close the outlet valve of the IHRA-4SS and disconnect the tubing to the instrument, allowing trapped pressure in the tubing run to be released. 3. Open valve A and close valves C and D (Figure 1 on page 4). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 9 of 16 MAINTENANCE 4. Remove the lockdown bolt. 5. Slowly open valve B and vent the gas in the reservoir. This allows the probe to withdraw from the pipeline. If the pressure in the pipeline has fallen to levels so low as to not produce the force on the probe required to push it out of the line, the probe can be manually pulled from the pipeline by hand. Take care that the pipeline pressure doesn’t increase while manually retracting the probe from the line as this would cause the probe to surge suddenly out of the pipeline producing a dangerous situation. 6. When the probe is completely withdrawn, close the pipeline isolation valve. 7. Open the outlet valve of the IHRA-4SS to vent off trapped pressure. 8. Open valves C and D to vent any remaining trapped gas in the lower housing. 9. Close all valves on the IHRA-4SS and remove the unit from the pipeline valve. 10. The IHRA-4SS is now ready for disassembly or to be moved to another location. 3.3 DISASSEMBLY/ASSEMBLY AND MAINTENANCE 1. Make sure that the probe is fully retracted and valves A, B, C and D are closed. 2. Disconnect the tubing between valves C and D. 3. Use a crescent wrench on the body of valve A and remove the oil reservoir from the top cap of the insertion unit. 4. Push the probe assembly through the lower housing so that the thermal fins are fully exposed (Figure 8). Lower Housing Insertion Shaft Thermal Poppet Fins Vespel Seat Spring O-Ring Seat Retainer Figure 8 Fully Exposed Thermal Fins Model shown had flange connection. 5. Slide the lock collar over the stand-offs, and tighten it around the shaft. 6. Use a wrench to secure the probe, and use another wrench to loosen the thermal fin/seat retainer sub-assembly. 7. Remove the seat retainer, spring and poppet (Figure 9). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 10 of 16 MAINTENANCE Thermal Poppet Fins Figure 9 Thermal Fin/Seat Retainer Vespel Seat Spring O-Ring Seat Retainer 8. Examine the poppet to ensure there is good finish on the seating face. Replace the poppet and spring, if damaged. 9. Use a small knife or pointed instrument to carefully pick the vessel seat out of the thermal fin/seat retainer subassembly. 10. Visually inspect the seat for debris or scratches and replace it, if damaged. 11. Guide the poppet into the seat. 12. Replace the spring and the seat retainer, and use a wrench to tighten snugly. 13. Replace the O-ring and place the thermal fin/seat retainer subassembly to the side. The push rod and contact rod are free and will fall out of the shaft and the IHRA4SS, if care is not taken. 14. Remove the heated regulator body from the base and set to the side. 15. Remove the base from the insertion shaft and replace both O–rings on the base (Figure 10). Lock Collar O-Ring O-Ring Base Figure 10 Insertion Shaft with O–rings and Backup Rings 16. Reinstall the base to the heated regulator assembly, and use a wrench to tighten (Figure 11). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 11 of 16 MAINTENANCE Heated Regulator Assembly Figure 11 Heated Regulator Body on Base Base Heating Element 17. Unscrew the spring housing from the heated regulator body. 18. Reinstall the diaphragm with metal pad facing down (Figure 12). Spring Range Disc Spring Diaphram Assembly Figure 12 Spring Housing and Diaphragm Assembly Spring Housing Spring Guide Bottom Spring Guide 19. Reinstall the spring guide. 20. Reinstall the spring housing to the heated regulator body. 21. Place the regulator sub-assembly to the side. 22. Loosen and remove the lock collar from the insertion shaft. 23. Remove the tie bolt nuts and slide the top cap off the shaft. 24. Replace the seals on the upper housing (Figure 13). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 12 of 16 MAINTENANCE O-Ring O-Ring Figure 13 Upper Housing with Seals Backup Ri Upper Housing (Top Cap) 25. Mark the top of the shaft and the top of the cylinder with directional indicators for proper reassembly. This enables the user to distinguish between the top and bottom of the shaft and cylinder upon reinstallation. 26. Carefully slide the insertion shaft and the actuator cylinder out of the lower housing (Figure 14). Actuator Housing Figure 14 Lower Housing and Cylinder Model shown had flange connection. Insertion Shaft Actuator Cylinder Lower Housing 27. Replace two O-rings and two backup rings on the lower housing (Figure 15). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 13 of 16 MAINTENANCE Backup Rings Figure 15 Lower Housing with Seals Model shown had flange connection. O-Rings 28. Remove the actuator cylinder from the insertion shaft, and replace the seals on the shaft piston (Figure 16). Backup Rings Figure 16 Insertion Shaft Piston with Seals Insertion Shaft Piston O-Rings Actuator Cylinder 29. Examine the shaft carefully. The surface is polished and must be free of scratches except on the extreme ends. Replace the shaft, if damaged. 30. Examine the inside of the cylinder for deep scratches. Replace the cylinder, if damaged. 31. Lubricate the inside of the cylinder liberally with DC 111 grease. 32. Reinsert the shaft into the cylinder approximately halfway according to the marks scribed on both parts (refer to Step 25). IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 14 of 16 MAINTENANCE Position the vent hole on the cylinder and the shorter portion of the shaft so that they face down toward the lower housing of the unit. 33. Lubricate the shaft with DC 111 grease. 34. Slide the lower housing onto the bottom end of the insertion shaft. 35. Slide the actuator cylinder onto the lower housing hub. 36. Slide the upper housing into the top end of the insertion shaft and down to the cylinder. 37. Reinstall the tie bolts and tie bolt nuts. Use the cross bolt pattern and a crescent wrench to secure the tie bolts. 38. Reinstall the lock collar on the top of the shaft. 39. Manually push the shaft up and down in the cylinder to check for smooth travel. If the shaft drags, find the cause, as this will damage the shaft finish. 40. Reinstall the thermal fin/seat retainer sub-assembly, and use a wrench to tighten snugly. 41. Slide the push rod into the shaft and carefully feel it slip onto the poppet. 42. Place the contact rod into the push rod and carefully screw the IHRA-4SS subassembly onto the top of the insertion shaft. The unit should screw on easily. If not, loosen the unit slightly and shake the assembly to help the contact rod slip into the regulator body hole. 43. Tighten the assembly snugly. 44. Fully retract the shaft and replace the oil reservoir and tubing. 45. Use Teflon (PTFE) tape or pipe dope on the valve threads. 46. The unit is now ready for installation and operation. IOM-118 IHRA-4SS-220/230 Rev: A Last updated: 8/31/2010 Page 15 of 16 13839 West Bellfort, Sugar Land, TX 77498-1671 Phone: (281) 491-2331 Fax: (281) 491-8344 Toll Free: (800) 776-7267 Web Page: www.welkereng.com