Flowserve V-378 R1 Edward Equiwedge Gate Valve - Manual (Page 2)

2
Flow Control Division
Edward Valves
Table of Contents
Introduction and Scope .........................3
Gate Valve Figure Numbers...................3
Description of Equiwedge
Gate Valve Types...............................4
Type I..................................................4
Type II ..............................................4-5
Type III ................................................5
Type IV................................................5
Type V.................................................5
Service Problems ..................................6
Packing Chamber Leak.......................6
Packing Recommendations..................6
Pressure Seal Gasket Leak ..................7
Pressure Seal Leak .............................7
Gate and Seat Leakage......................8
Body or Bonnet Wall Leak ..................8
Lubrication ........................................8
Repair Procedures.................................9
Valve Body Repairs.– Body
Bore Gasket Seal Area Repairs .........9
Body Wall Repairs ...........................10
Body Guide Repairs.........................10
Seat Repairs....................................10
Gate Repairs...................................11
Bonnet Repairs ................................11
Backseat .........................................11
Porosity in Bonnet ............................12
Stem Repairs ...................................12
Field Repair Equipment.....................12
Disassembly Procedure for
Equiwedge Gate Valves....................13
Disassembly Procedure for Bonnet Types,
Area 3
Type I .............................................14
Type II ............................................15
Type III ...........................................16
Type IV & V ....................................17
Reassembly Procedures for Equiwedge
Gate Valves ....................................18
Exploded View ...................................19
Reassembly Instructions........................20
Handwheel Actuated Valves..............20
Tapered Roller Bearing
Preload Instructions ........................21
Reassembly Instructions for
Valves with Composite Pressure
Seal Gaskets Only .........................23
Type I Reassembly............................24
Type II Reassembly...........................25
Type III Reassembly ..........................26
Type IV & V Reassembly ...................26
Appendix A
Procedure for Removing Manual
& Electric Actuators ...................28-29
Appendix B
Valve Tools Available for Rental .........30
Terms and Conditions..........................31
Contact Information ............................32
TABLES
Table 1 Gland Bolt Torques.................7
Table 2 Bonnet/Cover Bolt/
Nut Pull-up Torques.................7
Table 3 Welding Rod
Recommendations ................22
Table 4 Dimensions for
Bearing Preload Washer.......22
Table 5 Bearing Retainer
Preload Torque ....................22
Table 5A ..........................................22
Table 6 Bearing Retainer
Final Torque ........................22
Table 6A ..........................................22
Table 7 Composite Gasket
Bonnet/Cover Bolt/Nut
Pull-Up Torques ....................23