Graham Corporation Liquid Ring Pump 2 Series Installation, Operation & Maintenance Manual

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Summary of Contents for Graham Corporation Liquid Ring Pump 2 Series

Page 2: Table Of Contents
Graham Corporation Table of Contents Section 1 - General Information ....................3 1.1 Introduction............................3 1.2 General Description and Principle of Operation ................4 1.3 Description of Pump Model Codes ....................5 Section 2 - Installation Instructions ....................6 2.1 Handling............................6 2.2 Preservation............................
Page 3: Section 1 - General Information
Ring Pump. If you need to contact the Pump Service Department for assistance, please have available the pump serial number and model number. The Pump Service Department may be reached by contacting Graham Corporation in Batavia, NY by phone (585) 343-2216, Fax (585) 343-1097, or e-mail at service@graham-mfg.com.
Page 4: General Description And Principle Of Operation
Graham Corporation General Description and Principle of Operation Graham Vacuum Pumps and Compressors are of the liquid ring type. Single and two stage pumps are available in a wide range of sizes and materials. These options are listed in the Graham Sales Bulletin available on our web site.
Page 5: Description Of Pump Model Codes
Graham Corporation Service liquid quantities are a function of the particular model and the intended application. Check the data sheet for your specific pump model or see Table 1 of Section 3 which lists typical service liquid requirements for Graham Model Pumps.
Page 6: Section 2 - Installation Instructions
Graham Corporation Section 2 - Installation Instructions Handling Carefully unpack the pump. Bare pumps may be lifted with a sling placed around the bearing housings or under the flanges. Lift pump-motor assemblies by the baseplate only. Do not attach slings or hooks to the motor or the pump as this can cause misalignment.
Page 7: Coupling Alignment
Graham Corporation Install the piping for the service liquid and process, as required. Refer to Section 2.7 for details. The location of the installation or the storage of the pump should be in an area that will not subject the pump to freezing.
Page 8: Belt Drives
Graham Corporation Belt Drives CAUTION: TO PREVENT PERSONAL INJURY, DO NOT OPERATE THE PUMP WITHOUT PROPERLY GUARDING THE DRIVE BELTS. When pumps are supplied with belt drives, follow the belt manufacturer’s instructions to set the tension. Service Liquid Piping Arrangements The operating principle of a liquid ring pump depends on a continuous supply of clean service liquid, which is normally water.
Page 9 Graham Corporation A) Typical Installation of Once Through with No Recovery The service liquid is piped directly from a supply source to the pump. The liquid is separated from the gas in the separator and discharged to a drain. No recirculation nor recovery takes place.
Page 10 Graham Corporation B) Typical Installation of Closed Loop with Total Recovery This arrangement provides for the total recirculation of the service liquid. A heat exchanger is added to the system to remove the heat of compression, friction, and condensation from the service liquid before it is re-introduced to the pump.
Page 11: Shaft Seal Coolant Piping Arrangement
Graham Corporation C) Draining Before Start-Up CAUTION: DO NOT START THE PUMP WITH THE CASING FULL OF LIQUID. A Liquid Ring Pump should not be started with the casing full of liquid. Damage to the impeller(s) or the shaft will result. The normal liquid level should be no higher than the shaft centerline.
Page 12: 2.10 Electrical Requirements
Graham Corporation 2.10 Electrical Requirements All electrical wiring and installation must comply with local safety codes. After the electrical work is complete, the motor should be jogged to check for proper rotation. First, turn the pump by hand to see that it rotates freely. On packed gland pumps, it may be necessary to loosen the gland packing rings (see Section 3.2) to allow the shaft to turn easily.
Page 13: Pump Packing Adjustment
Graham Corporation Pump Packing Adjustment (where applicable) The packing adjustment nuts should be loosened before running to prevent damage to the shaft. With the gland follower loosened, the liquid pressure in the glands will force the packing rings against the gland follower. The pump can be run for several hours in this manner. Tighten the gland follower to allow the cooling fluid to drop from the gland at a rate of about 20 drops per minute from each end while the pump is running at a steady state.
Page 14: Service Liquid Requirements
Graham Corporation Service Liquid Requirements A) Flow Rates Sealant water flow rate will vary based on what conditions the liquid ring pump is operating under. Table 1 provides information for most operating conditions. Sealant flow is considered acceptable when the required vacuum level is at design, motor amps are at design, and cavitation is not evident during pump operation.
Page 15: 3.4 Cavitation
Graham Corporation B) Flow Control If a flow device is not used to measure the service liquid quantity to the pump, a regulating valve and compound gauge in the service liquid line can be used to approximate the flowrate. For pump operating pressures between atmospheric and 400 mmHgA, the reading on the compound gauge should be in the range of 2"...
Page 16: Shut-Down Procedure
Graham Corporation When cavitation takes place, vapor bubbles form and collapse within the liquid ring. This will damage the surfaces of the impeller, side plates, and casing. The cavitation shock force causes damage by tearing away metal particles and deforming soft materials. The damage can be more severe in a corrosive situation.
Page 17 Graham Corporation Flexible Connector Used to compensate for minor misalignment or expansion between the pump connections and the process piping. Vacuum Gauge Used to indicate vacuum at the pump inlet. Normally mounted directly ahead of the pump suction. Shut-off Valve Used to manually stop the flow of service liquid to the pump.
Page 18 Graham Corporation Atmospheric Air Inlet Optional Shut-off Valve Process Inlet Atmospheric Air Ejector Optional By-pass Valve Discharge Liquid Ring Vacuum Pump Typical Atmospheric Air Ejector IGURE...
Page 19: Section 5 - Maintenance
Graham Corporation Section 5 - Maintenance Performance Optimum performance and long service life are dependent upon good maintenance procedures and periodic inspections. When preparing to dismantle a pump, make provisions for the safe handling of heavy parts. Pump Estimated Weights Refer to table in Appendix D for estimated pump weights.
Page 20: Storage
Graham Corporation Storage If a pump is to be out of service, it should be protected internally from rusting by using a rust inhibitor. The pump should be drained completely by removing all the lower plugs. Install the plugs and fill with Oakite Ryconox 20M (or equal) preservative solution. Remove the manifold(s) and spray the insides with preservative.
Page 21: Troubleshooting Chart
Graham Corporation Troubleshooting Chart Problem Cause Solution Reduced Speed too low Check power supply and transmission • • Capacity Leak in suction line Repair • • Service liquid temperature too high Check coolant flow & heat exchanger • • Insufficient or excess service liquid Provide correct flow rate •...
Page 22: Section 6 - Rebuild Instructions
Section 6 – Rebuild Information General Graham Corporation has a fully staffed Service Department available to repair or rebuild your liquid ring vacuum pump. Prior to returning any equipment for service, a RMA number (Return Material Authorization Number) must be obtained.
Page 23 Graham Corporation Gaskets Gasket/ Gasket/ Compound Compound Single Stage IGURE Gaskets Gasket/ Gasket/ Compound Compound Two Stage IGURE...
Page 24: Tie Rod Torque Values
Graham Corporation B) Non-Gasketed Pumps Certain Graham pumps do not require gaskets, but use a joint sealing compound between the impeller casings and the end plates. They are machined to accommodate the same impeller end clearances as a gasketed pump.
Page 25: Section 7 - Warranty
Graham Corporation Section 7 - Warranty THE FOLLOWING IS IN LIEU OF ALL WARRANTIES OF GRAHAM EXPRESSED OR IMPLIED AND ALL IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND/OR ANY OTHER OBLIGATION ON THE PART OF GRAHAM ARE...
Page 26: Appendix A- Material Safety Data Sheets
Graham Corporation Appendix A MATERIAL SAFETY DATA SHEET...
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Page 29: Appendix B- Return Material Authorization Form
C. Authorized Customer Signature Send equipment, RMA form and MSDS sheets to the address shown above, Attn: Service Dept. Graham Corporation is not responsible for any freight charges. (Units must be returned with freight prepaid or they will not be accepted.)
Page 30: Appendix C Pump Information
Graham Corporation Appendix C Pump Information Side Side Mechanical Clearance Frame D.E. N.D.E. Packing Clearance Seal Size Size Bearing Bearing (mm) 0.000" 0.000" /20 DN (mm) /10 & /13 LXP30 6305-2Z LXP55 PV31060 3.5-5 6-7.5 PV31080 6306-2Z PV31110 PV32000 8-10...
Page 31: Appendix D- Pump Weights
Graham Corporation Appendix D Two Stage Pumps Avg Dry Weight Avg Dry Weight Frame Size (kg) (lbs) 32000 42000 52000 62000 72000 1440 82000 1600 3520 Single Stage Pumps Avg Dry Weight Avg Dry Weight Frame Size (kg) (lbs.) 31000...