DIPV - Process Valve Solutions

1 DIPVD ouble Block & Bleed Plug ValveDouble Isolation Plug ValveRangepage 6 Main Featurespage 7 Introductionpages 3 & 4 Design Featurespages 9 - 12 Pressure Testingpage 13 Valve Datapages 14 - 19 Materialspages 20 & 21 Sealants pages 22 - 25 Typical Installationspages 5 & 6 Figure Numbering / Standardspage 8 Optionspage 26 ContentsDouble Isolation Plug Valve2 Introduction - DIPVD ouble Isolation Plug ValveBased on Serck Audco SUPER-H pressure balanced taper plug technology, Double Isolation Plug Valveoffers true bubble tight double block and bleed, within a single Valve oil and gas industry is no longer satisfied with the shut-off provided by conventional double block andbleed ball, gate or plug valves . True double isolation has become a prime requirement as safety standardsare raised throughout the industry, especially where it is necessary for an operator to work downstream(or upstream) of the further advantage of true double isolation (where the first plug gives complete isolation), is that the bleedpoint can be used to verify that no contamination has occurred when more than one type of line mediumhas passed down the Serck Audco Super-H plug Valve is widely acknowledged in the oil and gas industry for its superiorshut-off at high differential pressures together with excellent reliability and durability.

2 This same design isused in the Serck Audco Double Isolation Plug Valve . No pipework modification - total interchangeability with existing valves . Choice of bleed connection options. Same range as single Valve - including hard facing. Meets the same industry and fire-test standards as a single Valve . Low life cycle cost - less than two single valves . Assured sealing on both sides of the Valve . Reduced leak paths - eliminates inter- Valve pipework on double block and bleed configurations. Compact, lightweight alternative to gate valves and ball valves in Plug - Single IsolationDouble Plug - Double IsolationIndependentally operated plugs meanmaximum downstream isolation PLUG - BUBBLE TIGHT SEAL AGAINST HIGH DIFFERENTIAL PRESSUREBACK-UP PLUGBLEED POINTWhat are the benefits?

3 3 COMPARED WITH GATE valves Same face-to-face but smaller overall. Compact design means less WITH BALL valves One dipv replaces two ball valves . Less interconnecting pipework means fewer leak paths. Weight saving. Cost double isolationwithin a single Valve bodyProven plug Valve integrity -setting new standards for double block & bleed45 Typical InstallationsGas Transportation - Gas Compression StationOil & Gas Production - Well Heads ManifoldCONFIGURATION USING BALL VALVESCONFIGURATION USING DOUBLE ISOLATION PLUG VALVESCOMPRESSORCOMPRESSORBLEED VALVEBLEED VALVEBALL VALVEDOUBLE ISOLATINGPLUG VALVETESTSEPARATORPRODUCTION HEADERTEST HEADERFLOW LINE FROM WELL HEADGASOILSAND6 Classinchesmm15030060090015002500250 380 4100 6150 8200 10250 12300 14350 16400 18450 20500 24600 RangeThe valves illustrated are 8" class 1500 Double Isolation Pllug valves in 25% Cr.

4 Duplex with Hub ends. Thevalves are installed on a flowline header application. In this case one isolation is by electric actuator andthe other isolation is by gear operator. Criteria for selection; true bubble tight isolation and space and weightsaving over conventional ball or gate valves and minimum valves illustrated are 4" class 300 flanged in Carbon Steel and Stainless Steel. The application is on afuel skid and both plugs on each Valve are lever operated. Criteria for selection; double block and bleed withtrue bubble tight isolation for reasons of safety, reliability and minimum InstallationsMain FeaturesPrinciples of OperationSerck Audco Double Isolation Plug valves feature twin Protected Pressure Balanced Taper Plugs and acentrally located bleed port, integral with the body.

5 They are designed to give bubble tight shut off on bothhigh and low pressure applications. This is a robust, In-Line Maintainable Valve with low maintenancerequirements. The Valve body is a rigid single piece casting or forging. The blow out proof Valve stems areinternally assembled and retained in the body. The separate plugs are retained in the body by a bolted orthreaded cover. The design incorporates provision for external adjustment of the individual stem individual plug position in the Valve seats allows for Valve sealant to be injected onto the Valve seats,which are the tapered contact surfaces of the body and BalancingAll dipv valves are protected against the possibility of seizure due to taperlocking. Taper locking is caused by an imbalance of forces acting on theplug due to line pressure finding its way into the lower (wider) part of theplug chamber.

6 As shown by the arrows in Fig. 1, the resultant force tends topush the plug upwards, jamming it in its tapered bore. The plug can remainlocked even when line pressure is subsequently an attempt to combat taper locking, conventional valves utilise thepressure of the plug sealant, acting on the upper face of the plug, to reactagainst the upwards force. This reduces, but does not eliminate, thepossibility of taper locking - and requires regular sealant injection tomaintain Valve Balancing Standard Super-H valves incorporate pressure balanced plugs, as shownin Fig. 2. The drilling and check Valve in the top section of the plug allow theline pressure itself to counteract the upwards force, preventing anypossibility of taper locking - without the need for frequent sealant Pressure Balancing(P)Flowserve PatentFor increased reliability in service and where there is a possibility ofparticles in the media we incorporate Protected Pressure Balance asstandard on the dipv (Fig 3).

7 This design ensures that the balancing holesare not exposed to the line media in the plug port, providing addedsecurity compared with normal pressure TreatmentAll Carbon Steel taper plug valves , have plugs with Super LoMu treatment. In this unique Process , lowfriction PTFE is incorporated in the surface structure of the Valve plug metal. This gives easier operation andenhanced resistance to taper lock over thousands of operations or many years of TypeAll valves described in this data book are filled with 733 sealant. If you require a sealant different fromnormal, please state this at the time of ordering so that the Valve can be assembled with the correct those cases where no previous experience exists regarding the suitability of the normal sealant for theline fluid on which the Valve is to be used, please provide full service details so that we may ensure that thecorrect type of sealant is used in the assembly of the 1 Fig.

8 2 Fig. 37 Figure Numbering8 The opposite illustrates a typical figure number, if a fuller explanation is required please request StandardsSheet 450 mm OR 18'' Valve Typeeg. Super HDIPV Double Isolation (Twin Plug)OperationG - GearedN - Bare StemW - WrenchPressure Rating2 - ASME 1503 - ASME 3006 - ASME 6009 - ASME 900A - ASME 1500B - ASME 2500C - API 2000D - API 3000E - API 5000 End Connections2 - Screwed BSP Taper3 - Flanged RF4 - Screwed API 5L5 - Flanged RTJ6 - Butt Weld End9 - Socket Weld EndBody MaterialC - Steel WCBB - Alloy Steel (API6A)M - LCC/LF2 Plug MaterialC - Case Hardened Carbon SteelJ - Electroless Nickel Coated Carbon Steel ( '' for NACE)M - Electroless Nickel Coated Manganese Steel (LCC)T - 17-4 PH Stainless SteelOptionsV - NACE MR0175 'Wetted Parts' and Cover BoltsP - NACE MR0175 'Wetted Parts'S - Special Customer requirementsSealant GradeA - 733B - 733 LTC - 733XD - 731S - SpecialSupplementary Variations4 5 03 3 HBG2 CCP0 0 0A1 2 3 4 5 6 7 8 9 10 11 1234567891011 The requirements for steel valves for refinery use are defined in API 599, BS 5353 is based on API 599 andplug valves to these two standards are interchangeable in all respects if the appropriate pattern isselected and steel plugs are used.

9 Steel pipeline valves are covered by API 6D for which there is no directBritish equivalent. However BS 5353 is a more stringent specification, so that valves complying with it willalso meet API 6D. API 6D permits iron plugs: BS 5353 permits iron plugs only by agreement betweenpurchaser and supplier. Therefore, it is British practice to manufacture the valves to BS 5353 except for thesubstitution of iron plugs. Double Isolation Plug valves meet the requirements of BS 5353, API 599, API 6 Dand ANSI valves made in materials to meet API 6A are also 2080BS EN 12266-1BS 6755 Pt 2BS 5353 ANSI 6 AAPI 6 DAPI 599 API 6 FANACE MR0175 ISO 9001 Face-to-face, centre-to-face, end-to-end, and centre-to-end dimensions of flanged and butt welding end steel valves for the petroleum, petrochemical and allied of valves .

10 Part 1 Specification for production pressure testing of valves . Part 2 Specification for fire type-testing for steel plug and end-to-end dimensions of ferrous - flanged and butt welding for wellhead for pipeline plug valves flanged or butt welding test for stress cracking resistant metallic material for oilfield Assurance approval Design Features9 Same face-to-face as one emergency stem sealant injection of mounting positions for actuators and Valve flange Blow Out Proof Stem: Super LoMu treated, double 'D' drive for Weather Equaliser Ring: for low torque and bubble tight Plug: Metal-to-metal seating, Super LoMu Pressure Balance Ball Bleed Port: integral with Bearing Spiral Wound Sealing Diaphragm.