FORGED STEEL VALVES BOLTED BONNET - Valve Repair

1 FORGED STEEL VALVESBOLTED BONNET MAINTENANCE MANUALGate, Globe, Parallel Slide and Check VALVES , 21/2 24 (65-600 mm)VEL FBBM General Introduction .. Essential Features of Velan RECEIVING& PREPARATION Receiving Inspection .. Quality Control Documentation .. Storage .. Handling and Preparation .. Special Instructions for Gate VALVES .. Special Instructions for Globe VALVES .. Special Instructions for Check VALVES .. Special Instructions for Tilting Disc Check VALVES .. Recheck for Bolt Tightness.

2 9 III Trouble Shooting Operation .. General .. Smoothness of Operation .. Recommended General Assembly Information .. Body/ BONNET & Body/Cover Torquing Procedure .. General .. Torque Procedure .. Application of Torque ..13 VINFORMATIONPERTINENT TOGATE, GLOBE, Packing .. Number of Packing Rings Required .. Packing Ring Removal On Line .. Removal With Repacking With Graphite Packing VALVES Without a Leak-Off Repacking With Graphite Packing VALVES With a Leak-Off Packing Torques.

3 Live-Loading Packings .. Detailed Maintenance .. Packing Chamber Leakage .. Body/ BONNET (Gasket) Leakage .. Welding & Removal of the Body/ BONNET Joint .. Seat Leakage ..23 TABLE OF .. & Disc Repairs - Gate & Parallel Slide Repairs .. Gate & Parallel Slide VALVES .. Globe, Needle, Stop & Piston Check VALVES .. of Repaired Parts .. Gate Parallel Slide Globe, Stop Check and Piston Check VALVES .. Tightness - Closing Backseat Repairs .. Torque Values - Actuator, Yoke/ BONNET Bolting.

4 32 GATEVALVEPAGEVI Gate Valve Assembly Drawing .. Exploded View .. Gasket Replacement .. Total Disassembly of Gate VALVES .. General .. Disassembly of Body/ BONNET and Wedge/Stem .. Disassembly of Top Works .. Assembly .. Top Works Assembly .. Body/ BONNET and Wedge/Stem Assembly( Valve Internal & Mid-Section)..38 GLOBEVALVEVII Globe & Piston Check Valve Assembly Drawings .. Gasket Replacement .. Total Disassembly of Globe VALVES .. General .. Disassembly of Body/ BONNET and Disc/Stem Union.

5 Disassembly of Top Works .. Total Disassembly of Stop Check Total Disassembly of Piston Check Valve .. Assembly .. Top Works Assembly .. Body/ BONNET and Disc/Stem Assembly ( Valve Internal & Mid-Section) ..45 PARALLELSLIDEVIII Parallel Slide Valve Assembly Drawing .. Gasket Replacement .. Alternate Gasket Replacement Procedure ..49 TABLE OF Total Disassembly of Parallel Slide VALVES .. General .. Disassembly of Body/ BONNET and Discs/Stem .. Disassembly of Top Works .. Assembly.

6 Top Works Assembly .. Body/ BONNET and Discs/Stem ANDTILTINGDISCVALVESPAGEIX SWINGCHECK& Check Valve Assembly Drawings .. Gasket Replacement .. Total Disassembly .. Body/ BONNET Disassembly .. Disc Assembly .. Check .. Disc .. Detailed Maintenance .. Body/ BONNET (Gasket) Leakage .. of Body/ BONNET Joint .. Seat Leakage - Swing Check .. Check Disc Repairs .. Repairs .. Seat Leakage - Tilting Disc .. Disc Repairs - Disc Seat Repairs - General .. Assembly .. Disc Assembly Fit-Up.

7 Check Disc Disc Unit .. Bearing Blue or Developer Test .. Check (Removal of disc is required) .. Disc .. Paper or Light Test .. Check (Removal of disc is not required).. Disc .. Internal and Mid-Section Assembly - Swing Check Valve .. Body/Cover Assembly - Swing Check & Tilting Disc ..65 APPENDIXIX Procedure for Removing Manual Gear Actuator .. Style 1 .. Style 2 .. Procedure for Removing Motor Actuators .. Procedure for Removing Motor Hydraulic or Pneumatic Actuators .. Spare Parts ..70 Terms and Conditions of OF CONTENTS45 INTRODUCTION IThis manual has been prepared by Velanengineers, designers and maintenancepersonnel to assist you in obtaining manyyears of satisfactory service from your FORGED steelvalves.

8 It will also assist you in restoring your valveto the best working condition with a minimum oftime and VALVES are designed and manufactured basedon many years of research and product develop-ment and are constantly being improved. Beforebeginning any major work, we recommend that youread this booklet carefully at least once to under-stand the Valve 's physical note that if you do not understand thereason for the service problem, we suggest that youget in touch with your local Velan representative orcall the Customer Service Manager for beginning any major work, we recommendthat you carefully check the nameplate on the valveand record the figure number to identify the typeand size of Valve .

9 See the Essential Features ofVelan VALVES form on the following page for anexplanation of Velan Figure Numbers . GENERAL INTRODUCTION6 IINTRODUCTIONGate, Globe and Check ValvesType of ConnectionSize of connectionClassTypeBody/ BONNET StyleBody MaterialTrim MaterialABCD EF G B16 305 4P :is a 10" (250mm) 1500 class carbon STEEL pressure seal gate Valve with TS trim and buttweld OF CONNECTIONAA -SpecialC- CombinationR- Flanged, ring jointW -Socket weldB - Butt weldF- Flanged, Undrilled flangesX- Butt weld (intermediate class)SIZE OF CONNECTION BCustomers have the choice of specifying Valve size as part of the Valve figure ( B ) using the numbers below, or indicating Valve size.

10 B16-3054P-02TS ( Valve size is part of figure number) 10" (250mm) B-3054P-02TS ( Valve size is shown separately)08- 2" (50mm)12- 4" (100mm)16- 10" (250mm)21- 18" (450mm)26- 26" (650mm)34- 34" (850mm)99- SPECIAL09- 21 2" (65mm)13- 5" (125mm)18- 12" (300mm)22- 20" (500mm)28- 28" (700mm)36- 36" (900mm)10- 3" (80mm)14- 6" (150mm)19- 14" (350mm)23- 22" (550mm)30- 30" (750mm)42- 42" (1050mm)11- 31 2" (90mm)15- 8" (200mm)20- 16" (400mm)24- 24" (600mm)32- 32" (800mm)48- 48" (1200mm) Valve TypeFigure Number Designation for Live-loading and Leak-offAdd a one-digit suffix to the figure number:StandardGate or globe0- for live-loading, double packing and leak-offPacked2- for live-loading onlyValves3- for double packing and leak-off :B16-3054P-02TS-0 is a 10" (250mm) 1500 class carbon STEEL pressure seal gate Valve with TS trim, live-loading, double packing and leak-offClassC0 1501 3002 6003 15004 25005 45007 900X SpecialTYPED01- Flow control05- Conv.