Summary of Contents for Mosherflo ST Series
- Page 1 JULY 1, 2010 ST‐SERIES I.O.M. Installation, Operation, and Maintenance Manual WITH PARTS LIST PUMPS ST SERIES PUMP Mosherflo Pumps, LLC. 5902A FM 517 RD. E. SAN LEON, TX 77539 281-800-PUMP (7867)
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Page 2: Table Of Contents
TABLE OF CONTENTS PUMP MAINTENANCE & REPAIR – SECTION E… PG. 15‐22 INTRODUCTION…………………………………………. PAGE 3 PUMP AND SEAL DISASSEMBLY & SAFETY – SECTION A………………………………….. PAGE 4 REASSEMBLY…………………………………... PG. 15‐21 Back Cover & Wear Plate INSTALLATION – SECTION B ………………………. PAGE 5‐9 Removal………………………….. 15 Suction Check Valve Pump Dimensions ………. PAGE 5 Removal………………………….. 15‐16 PREINSTALLATION INSPECTION……. PAGE 5 Rotating Assy Removal……. 16 POSITIONING PUMP……………………. PAGE 5‐6 Impeller Removal…………….. 16 Lifting………………………….. 5 Seal Removal……………………. 16 Mounting…………………….. 5‐6 Shaft & Bearing Removal Clearance…………………….. 6 & Disassembly…………………… 16‐17 SUCTION & DISCHARGE PIPING…… ... -
Page 3: Introduction
If there are any questions regarding the pump or its application which are not covered in this manual or in other literature accompanying this unit, please contact your Mosherflo distributor, or contact R.B. Mosher Co., Inc. at (281)339‐3382. For information or technical assistance on the power ... -
Page 4: Safety - Section A
SAFETY – SECTION A These warning apply to T Series basic pumps. R.B. Mosher Co., Inc. has no control over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before Do no operate the pump without the guards in place over attempting to begin operation. the rotating parts. Exposed rotating parts can catch clothing, ... -
Page 5: Installation - Section B
50% of the maximum permissible operating pressure as shown on the pump performance curve. If the maximum shelf life has been exceeded, or if anything appears to be abnormal, contact your Mosherflo For further assistance, contact your Mosherflo distributor distributor or R.B. Mosher Co., Inc. to determine repair or or the R.B. Mosher Co., Inc. updating policy. Do not put the pump into service until ... -
Page 6: Clearance
The pump may have to be supported or shimmed to SUCTION LINES provide for level operation or to eliminate vibration. To avoid air pockets which could affect pump priming, the Clearance suction line must be as short and direct as possible. When operation involves a suction lift, the line must always slope When positioning pump, allow a minimum clearance of 18 upward to the pump from the source of the liquid being inches (457 mm) in front of the back cover to permit pumped; if the line slopes down to the pump at any point removal of the cover and easy access to the pump interior. ... -
Page 7: Suction Line Positioning
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. If it is necessary to position inflow close to the suction If the application involves a high discharge head, gradually inlet, install a baffle between the inflow and the suction close the discharge throttling valve before stopping the inlet ... -
Page 8: Alignment
In high discharge head applications (more than 30 feet), NOTE an excessive amount of liquid may be bypassed and forced Check Rotation, Section C, before final alignment of the back to the wet well under the full working pressure of the pump. pump; this will reduce. Therefore it is recommended that an automatic air release valve be installed in the bypass When mounted at the R.B. Mosher Co., Inc. factory, driver line. and pump are aligned before shipmen. Misalignment will occur in transit and handling. Pumps must be checked and If the installation involves a flooded suction such as a realigned before operation. Before checking alignment, below‐ground lift station, a pipe union and manual shut‐ tighten the foundation bolts. The pump casing feet and ... -
Page 9: V-Belt Drives
straightedge rests evenly on both halves of the coupling, the coupling is in horizontal parallel alignment. If the coupling is misaligned, use a feeler gauge between the coupling and the straightedge to measure to measure the amount of misalignment. V‐Belt Drives When using V‐belt drives, the power source and the pump must be parallel. Use a straightedge along the sides of the pulleys to ensure that the pulleys are properly aligned (see Figure 3C). In drive systems using two or more belts, make ... -
Page 10: Operation -Section C
OPERATION –SECTION C Once the pump casing has been filled, the pump will prime and reprime as necessary. Review all SAFETY information in Section A. Follow the instructions on all tags, labels, and decals attached to the pump. After filling the pump casing, reinstall and tighten the fill plug. Do not attempt to operate the pump unless all connecting piping is securely installed. Otherwise, liquid in the pump forced out under pressure could cause injury This pump is designed to handle mild industrial to personnel. corrosives, residues, and slurries containing large entrained ... -
Page 11: Lines Without A Bypass
If the bypass line is open, air from the suction line will be discharged through the bypass line back to the wet well during the priming cycle. Liquid will then continue to circulate through the bypass line while the pump is in operation. Allow an over‐heated pump to cool before servicing. Do Lines Without a Bypass not remove plates, covers, gauges, or fittings from an overheated ... -
Page 12: Stopping
Open the suction line, and read the vacuum gauge with considered normal for bearings, and they can operate the pump primed and at operation speed. Shut off the safely to at least 180 degrees F (82 degrees C). pump. The vacuum gauge reading will immediately drop Checking bearing temperatures by hand is inaccurate. proportionate to static suction lift, and should then Bearing temperatures can be measured accurately by ... -
Page 13: Troubleshooting - Section D
TROUBLE POSSIBLE PROBABLE CAUSE REMEDY TROUBLESHOOTING – SECTION D PUMP FAILS TO Not enough Add liquid to PRIME liquid in casing. casing. See Review all SAFETY Information in section A. PRIMING. Suction check Clean or replace valve check valve. contaminated or damaged. Air leak in suction Correct leak. Before attempting to open or service the pump: line. Familiarize yourself with this manual. Lining of suction Replace suction Lock out or disconnect the power source to hose collapsed. ... - Page 14 Reduce suction pump. lift and/or friction losses in suction line. Record vacuum and pressure gauge reading and consult Mosherflo Representative. Pumping Locate and entrained air. eliminate source of air bubble. Pump or drive Secure mounting not securely ...
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Page 15: Pump Maintenance & Repair - Section E
PUMP MAINTENANCE AND REPAIR – SECTION E MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE. Before attempting to open or service the pump: Please refer to the PERFORMANCE PUMP CURVE available by request from your Mosherflo Representative. Familiarize yourself with this manual. Disconnect or lock out the power source to ensure that the pump will remain inoperative. Allow the pump to cool if overheated. Check the temperature before opening any covers, plates, or plugs. Close the suction and discharge valves. Vent the pump slowly and cautiously. Drain the pump. Pump speed and operating condition points must be ... -
Page 16: Rotating Assy Removal
opening and pull the complete assembly from the suction when unscrewing the impeller, tension on the shaft. Use flange (3). caution when unscrewing the impeller; tension on the shaft seal spring will be released as the impeller is NOTE removed. Inspect the impeller and replace if cracked or badly worn. Further disassembly of the check valve is not required since it must be replaced as a complete unit. Individual parts are Remove the impeller adjusting shims (28); tie and tag the not sold separately. shims, or measure and record their thickness for ease of reassembly. ... - Page 17 Remove the bearing housing drain plug (25) and drain the spin dry bearings. This may scratch the balls or races and lubricant. Clean and reinstall the drain plug. cause premature bearing failure. Disengage the hardware (15 and 16) and slide the bearing Rotate the bearings by hand to check for roughness or cap (10) and oil seal (13) off the shaft. Remove the binding and inspect the bearing balls. If rotation is rough bearing cap gasket (17), and press oil seal from the bearing or the bearing balls are discolored, replace the bearings. cap. The bearing tolerances provide a tight press fit onto the Place a block of wood against the impeller end of the shaft shaft and a snug slip fit into the bearing housing. Replace and tap the shaft and assembled bearings (2 and 9) from the bearings, shaft, or bearing housing if proper bearing fit the bearing housing. is not achieved. After removing the shaft and bearings, clean and inspect If bearing replacement is required, remove the outboard ...
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Page 18: Seal Installation
To prevent damage during removal from the shaft, it is When installing the bearings onto the shaft, never press or recommended that bearings be cleaned and inspected in hit against the outer race, balls or ball cage. place. It is strongly recommended that the bearings be Press the outboard oil seal (13) into the bearing cap (10) replaced any time the shaft and bearings are removed. ... - Page 19 1/4” I.D. x 1‐1/2”O.D. x 2‐inches long (32 mm x 38 mm x 51 mm). Slide the tube over the shaft threaded, then slide the O‐ring off the tube and onto the shaft. Remove the tube, and continue to slide the O‐ring down the shaft until it seats against the shaft shoulder. A new seal assembly should be installed any time the old When installing a new cartridge seal assembly, remove seal is removed from the pump. Wear patterns on the the seal from the container, and remove the mylar storage finished faces cannot be realigned during reassembly. tabs from between the seal faces. ...
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Page 20: Impeller Installation
Impeller Installation impeller washer (23) and capscrew; torque the capscrew to 90 ft. lbs. (1080 in. lbs. or 12.4 m kg.). (Figure 2) Rotating Assembly Installation Inspect the impeller, and replace it if cracked or badly worn. Inspect the impeller and shaft threads for dirt or (Figure 1) damage, and clean or dress the threads as required. NOTE If the pump has been completely disassembled, it is recommended that the suction check valve and back cover assembly be reinstalled at this point. The back cover assembly must be in place to adjust the impeller face clearance. The shaft and impeller threads must be completely clean before reinstalling the impeller. Even the slightest amount Install the bearing housing O‐ring (11) and lubricate it with of dirt on the threads can cause the impeller to seize to light grease. Ease the rotating assembly into the pump the shaft, making future removal difficult or impossible casing using the installation tool. Be careful not to without damage to the impeller or shaft. damage the O‐ring. Install the same thickness of impeller adjusting shims (28) Install the four sets of rotating assembly adjusting shims as previously removed. Apply ‘Never‐Seez’ or equivalent (15) using the same thickness as previously removed. to the shaft threads and screw the impeller onto the shaft Secure the rotating assembly to the pump casing with the until tight. Be sure the seal spring seats squarely over the hardware (13 and 14). Do not fully tighten the capscrews shoulder on the backside of the impeller. until the back cover has been reinstalled and the impeller face clearance has been set. NOTE A clearance of .010 to .020 inch (0.25 to .51 mm) between At the slightest sign of binding, immediately back the the impeller and the wear plate is also recommended for ... -
Page 21: Back Cover Installation
NOTE FINAL PUMP ASSEMBLY The check valve assembly must be replaced as a complete (Figure 4a and 4b) unit. Individual parts are not sold separately. Install the shaft key (12, Figure 5a and 5b) and reconnect the power source. Be sure to install any guards used over Reach through the back cover opening with the check the rotating members. valve (33), and position the check valve adaptor in the mounting slot in the suction flange (3). Align the adaptor with the flange hole, and secure the assembly with the check valve pin (34). NOTE If the suction or discharge flanges were removed, replace Do not operate the pump without the guards in place the respective gaskets, apply ‘Permatex Aviation No. 3 over the rotating parts. Exposed rotating parts can catch Form‐A‐Gasket’ or equivalent compound to the mating clothing, fingers, or tools, causing severe injury to surfaces, and secure them to the pump casing with the personnel. attaching hardware. Install the suction and discharge lines and open all valves. Back Cover Installation Make certain that all piping connections are tight, properly supported and secure. (Figure 1) Be sure the pump and power source have been properly If the wear plate (16) was removed for replacement, lubricated, see Lubrication. carefully concentric on the back cover and secure it with the hardware (19 and 20). The wear plate must be Remove the fill cover assembly (40) and fill the pump concentric to prevent binding when the back cover is casing with clean liquid. Reinstall the fill cover and tighten installed. it. Refer to OPERATION, Section C, before putting the pump back into service. Replace the back cover O‐ring (18), and lubricate it with a ... -
Page 22: Power Source
NOTE The white reflector in the sight gauge must be positioned horizontally to provide proper drainage. Under normal conditions, drain the bearing housing once each year and refill with approximately 16 ounces (0.5 liter) clean oil. Change the oil more frequently if the pump is operated continuously or installed in an environment with rapid temperature change. Monitor the condition of the bearing lubricant regularly for evidence of rust or moisture condensation. This is especially important in areas where variable hot and cold temperatures are common. For cold weather operation, consult the factory or a lubricant supplier for the recommended grade of oil. Power Source Consult the literature supplied with the power source, or contact your local power source representative. ... -
Page 23: Figures - Section F
FIGURES – SECTION F Figure 3b. Aligning Non‐Spider Type Couplings Figure 1. Pump Model ST‐3 Series Figure 3c. Pulley Alignment with V‐Belt Drives Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity Figure 3a. Aligning Spider‐Type Couplings Page | 23 ... - Page 24 SECTION DRAWING PARTS LIST Figure 4b. Pump Model ST ITEM NO. * PART NAME QTY. 1 PUMP CASING 1 2 * REPAIR ROTATING ASSY 1 3 SUCTION FLANGE 1 4 PIPE PLUG 1 5 HEX HD CAPSCREW 4 6 LOCKWASHER 4 7 * DISCHARGE FLANGE GASKET 1 8 DISCHARGE FLANGE 1 9 ...
- Page 25 SECTION DRAWING PARTS LIST Figure 5b. Pump Model ST Repair Rotating Assembly ITEM NO. * PART NAME QTY. 1 * IMPELLER 1 2 * SEAL PLATE GASKET 1 3 * SEAL ASSEMBLY 1 4 * INBOARD BALL BEARING 1 5 BEARING HOUSING 1 6 VENTED PLUG 1 7 AIR VENT 1 8 REDUCING PIPE BUSHING 1 9 ...
- Page 26 Figure 9. Seal Fully Installed Figure 6. Loosening Impeller Figure 7. Cartridge Seal Assembly Figure 8. Seal Partially Installed Page | 26 ...
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