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Xylem Bell & Gossett VSX Series, Instruction Manual

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Xylem Bell & Gossett VSX Series Instruction Manual Download Page 40

3

Table 6: 

Capscrew Torque 

  

Capscrew 

Torque 

(Foot-Pound) 

Capscrew Diameter 

Capscrew Type 

Head Marking 

1 / 4  5/16

3/8  7/16

1 / 2 

5/8 

3 / 4 

7/8 

1 

SAE Grade 2 

6  13  25  38  60  120 190 210 300 

Brass 
Stainless Steel 

 or 

4  10 17 27 42 83 130 

200 

300 

SAE Grade 5 

10  20  35  60  90  180 325 525 800 

SAE Grade 8 

13  28  46  75  115 225 370 590 895 

Summary of Contents for Bell & Gossett VSX Series

Page 1: ...INSTRUCTION MANUAL P5002169 REVISION E INSTALLER PLEASE LEAVE THIS MANUAL FOR THE OWNER S USE Series VSX VSH VSC and VSCS Models Centrifugal Pumps...

Page 2: ...HOOTING 22 GUARDS 24 ANSI OSHA COUPLING GUARD REMOVAL INSTALLATION 24 Removal 24 Installation 24 BRACKET GUARDS 25 SERVICE 26 GENERAL DISASSEMBLY PROCEDURES 27 SHUTDOWN 27 DISASSEMBLY PROCEDURE TO REM...

Page 3: ...Seal Sizes 4x6x10 5 5x6x10 5 5x6x13 5 6x8x10 5 6x8x13 5 8x10x10 5 175 psi 300 psi 2 5 Seal Sizes 8x10x13 5 10x12x10 5 10x12x13 5 175 psi 300 psi 3 Seal Sizes 12x14x13 5 14x16x13 5 160 psi 300 psi 3 5...

Page 4: ...Model VSH VSC or VSCS The pump nameplate gives identification and rating information as shown in Figures 1 and 2 Permanent records for this pump are referenced by the serial number and it must be used...

Page 5: ......

Page 6: ...age Mechanical Safety WARNING Unexpected Startup Hazard Disconnect and lockout power before servicing Failure to follow these instructions could result in serious personal injury or death or property...

Page 7: ...extended shutdown after the unit is in operation the following requirements for short term storage apply Store in a covered and dry location Store the unit free from excessive cold or heat below 32 F...

Page 8: ...When the baseplate of the assembly is structural channel construction the pump and base plate should be set in place first The motor should then be separately lifted mounted to the unit Figure 4b App...

Page 9: ...a steady flow of liquid This condition provides a positive suction head on the pump It may also be possible to prime the pump by pressurizing the suction vessel Important Do not install and operate Be...

Page 10: ...leted and after the pump is installed and bolted down align it again It may be necessary to re adjust the alignment from time to time while the unit and foundation are new Optional Grouting It is perm...

Page 11: ...be checked by using a caliper to gauge the distance between the two hubs at various points around the circumference Do not rotate the shafts Reposition the equipment until the difference between the m...

Page 12: ...ial to zero Rotate both coupling halves together making sure the index lines remain matched Reposition the equipment until the offset is within the permissible value Parallel misalignment may be check...

Page 13: ...t Replacement capscrews are to be purchased through your local Bell Gossett representative WARNING Flying Objects Hazard Capscrews with damaged or absent thread lock coating should be not be used Othe...

Page 14: ...angers or other supports at necessary intervals to provide support When expansion joints are used in the piping system they must be installed beyond the piping supports closest to the pump Tie bolts s...

Page 15: ...p Refer to the Hydraulic Institute Standards for inlet pipe sizing and velocity requirements Elbows in the suction piping for horizontal double suction pumps should be installed per the Hydraulics Ins...

Page 16: ...e rather than the multiple spring type sized to avoid excessive friction in the suction line The foot valve and pipe should be sized to maximize NPSHa to the pump by minimizing suction line losses Che...

Page 17: ...king If the pump system pressure conditions vary during the day packing adjustment becomes difficult Consideration should be given to using a mechanical seal Standard pumps are normally packed before...

Page 18: ...d then control the drippage by tightening the packing gland A combination of both adjustments is essential to arrive at the optimum condition The life of packing and sleeve depends on careful control...

Page 19: ...1 Figure 18 Vee cut Impeller Diameters...

Page 20: ...e CAUTION Seal Damage Hazard Do not run pump dry Seal damage may occur Failure to follow these instructions could result in serious property damage and or moderate personal injury While venting the ai...

Page 21: ...ld Venturi meters flow nozzles orifice plates or timing the draw down in the wet well are all possible methods Record any reading for future reference 3 Pressure Check and record both suction and disc...

Page 22: ......

Page 23: ......

Page 24: ...le pump and clean impeller Not Enough Liquid Delivered 8 Air leaks in suction piping Test flanges for leakage by plugging inlet and putting line under pressure A gauge will indicate a leak with a drop...

Page 25: ...advised by factory 31 Cavitation See item 13 32 Mechanical defects See items 14 and 15 33 Liquid heavier in either viscosity or specific gravity than allowed for Use larger driver Consult factory for...

Page 26: ...screws and hardware that fasten the guards to the guard support 5 On units supplied with spacer couplings a second guard support is supplied underneath the inner guard If present remove the two capscr...

Page 27: ...d Failure to follow these instructions could result in serious personal injury or death or property damage Guarding is also provided to give protection for the exposed shaft length between the seal gl...

Page 28: ...26 SERVICE Figure 22 Mechanical View...

Page 29: ...of the pump housing Do not reinstall the plug or close the drain valve until reassembly is completed Failure to follow these instructions could result in moderate personal injury or property damage D...

Page 30: ...ng bracket DISASSEMBLY PROCEDURE TO REMOVE STANDARD MECHANICAL SEALS 1 Loosen the set screws in the sleeve 2 Remove the four gland assembly capscrews 3 Remove the gland assembly and the sleeve from th...

Page 31: ...ng box gasket 7 Remove the quad ring from the shaft 8 Repeat steps 1 through 7 for the other side 9 If only the packing rings and sleeve are to be replaced proceed to the section entitled Assembly Pro...

Page 32: ...AND SHAFT ASSEMBLY ALL PUMPS 1 Ensure shaft threads are protected using tape or nuts See Figure 34 2 Remove the volute capscrews Using jacking screws pull the coverplate from the volute See Figure 34...

Page 33: ...he quad ring grooves See Figure 37 Figure 37 Installing the Quad Rings 6 Slide the volute gasket onto the coverplate See Figure 38 Grease may be used to hold the gasket in place 3 P 80 is a registered...

Page 34: ...on soapy water or equivalent NOTE Handle the seals with care Clean the glands and seals before assembly Take care not to damage the seals during assembly Figure 43 The Seal Seat Installed in the Gland...

Page 35: ...sket in place 5 Slide the sleeve stuffing box subassembly over the shaft until the sleeve bottoms out onto the shaft locating shoulder 6 Install the four stuffing box capscrews 7 Install set screws in...

Page 36: ...backup ring onto the shaft See Figure 49 See Figure 22 for a listing of pump sizes with 2 frames Figure 49 Installing the Bearing Backup Ring 2 Frame Pumps Only 3 Heat the bearing using an induction h...

Page 37: ...3 5...

Page 38: ...ge 1 Remove the pump from the base 2 Follow the Disassembly Procedures applicable to the pump NOTE Only one of the coverplates must be removed to change rotation 3 Press the press fitted impeller off...

Page 39: ...earing parts The recommended inventory of spare parts depends upon the installation and the importance of continued operation For normal service with repairs to be made in the field the following part...

Page 40: ...rew Diameter Capscrew Type Head Marking 1 4 5 16 3 8 7 16 1 2 5 8 3 4 7 8 1 SAE Grade 2 6 13 25 38 60 120 190 210 300 Brass Stainless Steel or 4 10 17 27 42 83 130 200 300 SAE Grade 5 10 20 35 60 90 1...

Page 41: ...or replaced under the Warranty are warranted only for the balance of the warranty period on the parts that were repaired or replaced Seller shall have no warranty obligations to Buyer with re spect to...

Page 42: ...without Seller s written approval b subject to misuse misapplication neglect alteration accident or physical damage c used in a manner contrary to Seller s instructions for installation operation and...

Page 43: ...NOTES...

Page 44: ...s used conserved and re used in the future is central to our work Our products and services move treat analyze monitor and return water to the environment in public utility industrial residential and...

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