ACE OM-06117−02 May 8, 2008 INSTALLATION, OPERATION, AND MAINTENANCE MANUAL WITH PARTS LIST VGH SERIES PUMP MODEL VGH2C31−B THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO www.grpumps.com GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA e2008 The Gorman-Rupp Company Printed in U.S.A.
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TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE I − 1 SAFETY - SECTION A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE A − 1 INSTALLATION − SECTION B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE B − 1 PREINSTALLATION INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POSITIONING PUMP . . . .
TABLE OF CONTENTS (continued) BEARING TEMPERATURE CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Seal Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VGH SERIES OM−06117 INTRODUCTION Thank You for purchasing a Gorman-Rupp pump. Read this manual carefully to learn how to safely install and operate your pump. Failure to do so could result in personal injury or damage to the pump. This manual will alert personnel to known procedures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel.
VGH SERIES OM−06117 SAFETY - SECTION A This information applies to VGH Series basic pumps. Gorman-Rupp has no control over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before attempting to begin operation. Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and precautions for each specific application.
OM−06117 If this pump is used with volatile and/or flammable liquids, overheating may produce dangerous fumes. Take precautions to ensure the area surrounding the pump is adequately ventilated. Allow the pump to cool and use extreme caution when venting the pump, or when removing covers, plates, plugs, or fittings. VGH SERIES of time.
VGH SERIES OM−06117 INSTALLATION − SECTION B Review all SAFETY information in Section A. Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and arrange the pump and piping. Most of the information pertains to a standard static lift application where the pump is positioned above the free level of liquid to be pumped.
OM−06117 Mounting Locate the pump in an accessible place as close as practical to the liquid being pumped. Level mounting is essential for proper operation. The pump may have to be supported or shimmed to provide for level operation or to eliminate vibration. SUCTION AND DISCHARGE PIPING Materials Either pipe or hose maybe used for suction and discharge lines; however, the materials must be compatible with the liquid being pumped.
VGH SERIES Suction Lines In Sumps If a single suction line is installed in a sump, it should be positioned away from the wall of the sump at a distance equal to 1 1/2 times the diameter of the suction line. If there is a liquid flow from an open pipe into the sump, the flow should be kept away from the suction inlet because the inflow will carry air down into the sump, and air entering the suction line will reduce pump efficiency.
OM−06117 DISCHARGE LINES VGH SERIES FILL ONLY THROUGH CONSTANT LEVEL OILER Siphoning Do not terminate the discharge line at a level lower than that of the liquid being pumped unless a siphon breaker is used in the line. Otherwise, a siphoning action causing damage to the pump could result. DO NOT FILL THROUGH VENT PLUG Figure 2. Lubricating Bearing Cavity Valves If a throttling valve is desired in the discharge line, use a valve as large as the largest pipe to minimize friction losses.
VGH SERIES OM−06117 When checking alignment, disconnect the power source to ensure that the pump will remain inoperative. Adjusting the alignment in one direction may alter the alignment in another direction. check each procedure after altering alignment. Coupled Drives When using couplings, the axis of the power source must be aligned to the axis of the pump shaft in both the horizontal and vertical planes. Most couplings require a specific gap or clearance between the driving and the driven shafts.
OM−06117 VGH SERIES The electrical power used to operate the pump is high enough to cause injury or death. Obtain the services of a qualified electrician to make all electrical connections. MISALIGNED: SHAFTS NOT PARALLEL MISALIGNED: SHAFTS NOT IN LINE ALIGNED: SHAFTS PARALLEL AND SHEAVES IN LINE Figure 3C. Alignment of V-Belt Driven Pumps Tighten the belts in accordance with the belt manufacturer’s instructions.
OM−06117 VGH SERIES OPERATION − SECTION C Review all SAFETY information in Section A. PRIMING Follow the instructions on all tags, labels and decals attached to the pump. Install the pump and piping as described in INSTALLATION. Make sure that the piping connections are tight, and that the pump is securely mounted. Check that the pump is properly lubricated (see LUBRICATION in the MAINTENANCE AND REPAIR manual).
OM−06117 suction line and pump casing. To prime a pump with a hand vacuum pump, open the cock on the pump priming line. Operate the hand pump until liquid flows out of the check valve on the bottom of the primer pump. Once the pump is primed, close the valve located between the primer and the pump so that the prime will not be lost. VGH SERIES Auxiliary Ejectors Ejectors function much like exhaust primers. They may be operated by steam, compressed air, water or exhaust gases.
OM−06117 VGH SERIES OPERATION If overheating does occur, stop the pump immediately and allow it to cool before servicing it. Approach any overheated pump cautiously. Strainer Check Pump speed and operating points must be within the continuous performance range shown on the pump curve (see page E−1). Leakage No leakage should be visible at pump mating surfaces, or at pump connections or fittings. Keep all line connections and fittings tight to maintain maximum pump efficiency.
OM−06117 VGH SERIES BEARING TEMPERATURE CHECK To avoid serious damage to the pump, check for unusual noises or excessive vibration while the pump is running. If noise or vibration is excessive, stop operation and refer to the TROUBLESHOOTING, Section D, before resuming operation. STOPPING Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly, damaging shock waves can be transmitted to the pump and piping system. Close all connecting valves slowly.
OM−06117 VGH SERIES uid from an external source. When handling clean liquids, flushing liquid is taken from the pump discharge and supplied through the seal flush line supplied with the pump. When handling abrasive or tacky liquids, it may be necessary to supply fresh lubricating liquid from an external source. Be sure the liquid supplied to the seal is compatible with the liquid being pumped, and that its flow is controlled to prevent dilution. Consult the factory if flushing is required.
VGH SERIES OM−06117 TROUBLESHOOTING − SECTION B Review all SAFETY information in Section A. Before attempting to open or service the pump: 1. Familiarize yourself with this manual. 2. Lock out or disconnect the power source and take the necessary precautions to ensure that the pump will remain inoperative. 3. Allow the pump to completely cool if overheated. 4. Check the temperature before opening any covers, plates, or plugs. 5. Close the suction and discharge valves. 6.
OM−06117 VGH SERIES Table D-1 Troubleshooting Chart (Continued) TROUBLE PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR PRESSURE (cont.) POSSIBLE CAUSE PROBABLE REMEDY Impeller or other wearing parts worn Replace worn or damaged parts. or damaged. Check that impeller is properly centered and rotates freely. Leaking or worn seal or pump gas- Check pump vacuum. Replace leakket. ing or worn seal or gasket. Impeller clogged. Free impeller of debris.
VGH SERIES OM−06117 Table D-1 Troubleshooting Chart (Continued) TROUBLE BEARINGS RUN TOO HOT POSSIBLE CAUSE Bearing temperature is high, but Check bearing temperature regularly within limits. to monitor any increase Low or incorrect lubricant.
OM−06117 VGH SERIES Preventive Maintenance Schedule Service Interval* Item General Condition (Temperature, Unusual Noises or Vibrations, Cracks, Leaks, Loose Hardware, Etc.
VGH SERIES OM−06117 PUMP MAINTENANCE AND REPAIR - SECTION E MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE. STANDARD PERFORMANCES FOR PUMP MODEL VGH2C31−B Based on 70_ F (21_ C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be difference due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
OM−06117 VGH SERIES SECTION DRAWING PARTS PAGE Figure 1.
VGH SERIES OM−06117 PARTS LIST Pump Assembly VGH2C31−B (From S/N 1379872 Up) If your pump serial number is followed by an N", your pump is NOT a standard production model. Contact the Gorman-Rupp Company to verify part numbers. ITEM PART NAME NO.
OM−06117 PUMP AND SEAL DISASSEMBLY AND REASSEMBLY Review all Safety information in Section A. Follow the instructions on all tags, label and decals attached to the pump. This pump requires little service due to its rugged, minimum-maintenance design. However, if it becomes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional view (see Figure 1) and the accompanying parts list.
VGH SERIES OM−06117 move the seal plate gasket (41) and clean the mating surfaces. Immobilize the impeller shaft (20). Remove the impeller hardware (45, 46, 47 and 50). Using a softfaced mallet, tap the impeller from the shaft. Retain the impeller key (51). Inspect the impeller and replace it if cracked or badly worn. Wear Ring Removal Inspect the wear rings (42 and 44) for excessive wear or scoring. The wear rings are secured in the pump casing and seal plate by the set screws (54) and a press fit.
OM−06117 VGH SERIES Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil. Bearings must be kept free of all dirt and foreign material. failure to do so will greatly shorten bearing life. Do not spin dry bearings. This may scratch the balls or races and cause premature bearing failure. Rotate the bearings by hand to check for roughness or binding and inspect the bearing balls.
VGH SERIES OM−06117 Wear Ring Installation Seal Installation (Figures 1 and 2) Inspect the throat bushing (52) for wear or scoring. If replacement is required, position the seal plate on the bed of an arbor (or hydraulic) press with the impeller end facing up and use a suitably sized dowel to press the bushing from the seal plate bore. Invert the seal plate on the press and use a suitably sized sleeve to install a new bushing in the seal plate.
OM−06117 VGH SERIES SEAL FLANGE SEAL PLATE SET SCREW O-RING STATIONARY SEAT ROTATING ELEMENT IMPELLER SHAFT SHAFT SLEEVE BELLOWS SPRING STATIONARY SEAT O-RING CAGE Figure 2. Cartridge Seal Assembly move any fingerprints. Screw the pin into the seal flange to secure the stationary seat. This seal is not designed for operation at temperatures above 160_F (71_C). Do not use at higher operating temperatures. Lubricate the O-ring (40) with water or light oil and install it in the groove in the I.D.
VGH SERIES OM−06117 Impeller and Pump Casing Installation LUBRICATION Inspect the impeller, and replace it if cracked or badly worn. Install the impeller key (50) in the shaft keyway. Align the impeller keyway with the key and slide the impeller onto the shaft until fully seated. Seal Assembly The seal assembly is lubricated by the medium being pumped and no additional lubrication is required. NOTE After the impeller has been properly positioned, check for free rotation.
OM−06117 VGH SERIES portant in areas where variable hot and cold temperatures are common. Power Source For cold weather operation, consult the factory or a lubricant supplier for the recommended grade of oil. Consult the literature supplied with the power source, or contact your local power source representative.
For U.S. and International Warranty Information, Please Visit www.grpumps.com/warranty or call: U.S.: 419−755−1280 International: +1−419−755−1352 For Canadian Warranty Information, Please Visit www.grcanada.com/warranty or call: 519−631−2870 THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED D ST.
