APV API6D Installation, Operation & Maintenance Manual Download Page 1

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INSTALLATION, OPERATION & MAINTENANCE MANUAL

EXPANDING SEAL PLUG VALVE

DOUBLE BLOCK & BLEED

API6D

TWIN

SERIES

Summary of Contents for API6D

Page 1: ...www australianpipelinevalve com au INSTALLATION OPERATION MAINTENANCE MANUAL EXPANDING SEAL PLUG VALVE DOUBLE BLOCK BLEED API6D TWIN SERIES ...

Page 2: ...ket Oilfield Products Valves Wellheads Gate Globe Check Valves Forged Steel Plug Valves Lubricated Sleeved Lined Gate Globe Check Valves Cast Steel Diamond Gear Gearboxes Flowturn Gate Globe Check Valves Flowturn Instrument Valves Flowturn Ball Valves Multiway Deadman Flowturn Strainers Sight Glasses Supercheck Wafer Check Valves Superseal Butterfly Valves Steamco Steam Valves Superseal Industrial...

Page 3: ...emoval From Line 16 5 0 Gearbox Removal 16 6 0 Valve Disassembly 17 7 0 Maintenance 18 19 EXPANDING SEAL PLUG VALVE DOUBLE BLOCK BLEED API6D TWIN SERIES I N D E X Australian Pipeline Valve Installation Operation and Maintenance Manual 1 Copyright Australian Pipeline Valve 1990 2018 Edition Catalogues photos brochures and technical publications are the exclusive property of Australian Pipeline Valv...

Page 4: ...er requirements Correct type pressure class size body and trim materials and end connections this information may be found on the nameplate or may be stamped on the body of the valve Any damaged caused during shipping and handling to end connections hand wheel or stem Note We do recommend that this entire document be read prior to proceeding with any installation or repair Australian Pipeline Valv...

Page 5: ...ustry chemical fertiliser power industry etc Class 150 1500LBS and working temperature of 29 180 C MAIN STRUCTURAL FEATURES The Twinseal style double expanding plug valve has a rugged structure reliable sealing excellent performance and exact tolerances Sealing rings around the valve plug provide the seal It has a unique design incorporating machined and pressed sealing rings Bi directional double...

Page 6: ...soft seat material is compressed into the recessed groove The design does not require springs or pressure to effect a seal Double block and bleed and zero leakage The Twinseal valve provides upstream and downstream seal in both directions and a bleed point is then provided between the two seats to prove no leakage Zero leakage The Twinseal meets the demands of frequent cycling and verifiable relia...

Page 7: ...8 CF8M CF3 CF3M 12 Bearing Assembly 13 Slip Sealing Ring Viton PTFE 14 O Rings NBR PTFE VITON 15 Packing Flexible graphite stainless steel PTFE 16 Gland ASTM A216 WCB ASTM A351 CF8 CF8M CF3 CF3M 17 Yoke ASTM A216 WCB ASTM A351 CF8 CF8M CF3 CF3M 18 Slide Bushing ASTM A216 WCB ASTM A105 ASTM A351 CF8 CF8M CF3 CF3M 19 Stem Back Stem ASTM A182 Gr F6a ASTM A182 316 20 Handwheel ASTM A436 Gr 60 40 18 A2...

Page 8: ... inefficient operation or early maintenance problems support piping on each side of the valve A valve is a pressurised device containing energised fluids and should be handled with appropriate care Valve surface temperature may be dangerously too hot or too cold for skin contact Upon disassembly attention should be paid to the possibility of releasing dangerous and or ignitable accumulated fluids ...

Page 9: ... some chemicals will damage sealing components e Never part open valve valve must be fully open of fully closed or else the seats will be damaged For all operations make reference to position number on part list of the applicable drawing The drawing in the Appendix is a general drawing only for more accuracy refer to the as built drawings supplied with the order SCOPE OF INSTALLATION ACCORDING TO ...

Page 10: ... to check the complete absence of dust rust foreign matters and the integrity of lubricant coat If not satisfactory then clean and lubricate the internal part using a nebulised lubricant Do not leave any lubricant on the seat itself or else the seat may attract debris which in turn could damage the seat After cleaning and lubrication the ball must be operated close open complete stroke The ball mu...

Page 11: ...icable or suitable eyebolts Never handle the valve by yoke or using the lever or actuator or gear box eye bolts Never lift from bore of valve Do not lift the valve using only one lifting lug b The end protectors must be removed only immediately before installation If one of end is not connected to the line for a period of longer than half a day the opened end shall be securely sealed with plastic ...

Page 12: ... during construction prior to turning the valve and potentially damaging the seat Flushing where deemed necessary is the most dangerous activity for the valve and it happens before they are put into service Ball valves are normally not lubricated however should it be required to flush potential debris or lubricate sticky valves a different practise to the lubrication of either a gate valve or plug...

Page 13: ...at spring jamming in which case a line flushing agent like Clare 601 Valve Cleaner may be required Of course for leaking seats a heavier sealant like Clare 601 lubricant must be used for temporary emergency sealing 2 Use an appropriate high pressure grease injection pump capable of overcoming the pipe pressure and the high pressure build up caused by the grease itself during it s injection in the ...

Page 14: ...VALVE DOUBLE BLOCK BLEED API6D TWIN SERIES Natural gas is not usually clean Natural gas may carry condensates and dirt that gets trapped in the valves and may damage the internal parts Also operation of the valves becomes more difficult It is true that plant sites do install filters in their system but experience has proven that no system is perfect The internal parts of the valve can be partially...

Page 15: ...APV plug valves are handwheel operated and require up to 3 turns to open or close Up to 2 3 4 turns expand or retract the slips while 1 4 turn rotates the plug Large valves operate in a similar manner that they have enclosed weather proof worm gearing The plug lift lowering rotation action is performed in the operator assembly The operator handwheel is rotated clockwise to close and counter clockw...

Page 16: ...ing and repair of the APV plug valve differential pressure thermal relief DTR bleed system Background When APV valve is seated and completely fill with a liquid any slight variation in temperature due to the sun s rays or ambient thermal fluctuations will cause drastic changes in body cavity pressure resulting from thermal expansion While results vary under actual service conditions depending on m...

Page 17: ...R If closed during normal operation the automatic portion of the relief system relief check valve will be defeated The outlet of the relief valve would close when closing the isolation valve Valve Operation In the fully open position the resilient seals are positioned out of the flow path and protected within the body of the valve itself As the valve is cycled from the fully open to closed positio...

Page 18: ...uid trapped in cavity Take safety precautions to avoid personal injury during this procedure Then carefully remove drain plug once you are sure valve has no remaining fluid or gas in cavity d Keep the plug in the fully open position e Remove the valve from the line The valve shall be handled by means of lifting lugs fitting on the valve if applicable Standard field techniques and procedures are sa...

Page 19: ...r Note The below parts refer to the general drawing in Table 2 This is a general overview drawing only Each size class range does vary so refer to the actual as built drawing TABLE 2 APV PLUG VALVE ASSEMBLY TYPICAL NO DESCRIPTION 1 Hex Head Bolt 2 Packing Gland 3 O Ring 4 O Ring 5 Packing 6 Hex Nut 7 Stud 8 Upper Bonnet 9 Bushing 10 O Ring 11 Gasket 12 Plug 13 Slip 14 NPT Plug 15 Body 16 Lower Bon...

Page 20: ...or zero line pressure then remove lower plate No 16 or bonnet No 8 APV has both top and bottom entry to facilitate in line maintenance c Seating slips No 13 can be withdrawn from plug dovetails and replaced It is usually best to replace the gasket No 11 and lower plate o ring No 10 or bonnet O ring No 10 when slips are replaced If stem packing should fail it can be changed as follows a Close valve...

Page 21: ...ross one of the seating slips APV valves with this self contained thermal relief assembly should be installed with the discharge of the thermal relief valve piped to the upstream side of the valve If after the APV valve is installed in the line it is noticed that the thermal relief assembly is piped to the downstream port the tubing should be switched to the upstream port There is a half inch manu...

Page 22: ...Australian Pipeline Valve Installation Operation and Maintenance Manual NOTES ...

Page 23: ...Australian Pipeline Valve Installation Operation and Maintenance Manual NOTES ...

Page 24: ...ve any requirements in the field of valves please contact us for a prompt response Continuous development of Australian Pipeline Valve products may necessitate changes in the design or manufacture process Australian Pipeline Valve reserves the right to effect any such changes without prior notice Australian Pipeline Valve 1990 2018 Edition LOCAL DISTRIBUTOR AGENT IOM APV Plug Expanding A D E L A I...

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