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Double Isolation Plug Valve Double Block & Bleed Plug Valve

Double Isolation Plug Valve Typical Installations pages 5 & 6 Main Features page 7 Figure Numbering / Standards page 8 Design Features pages 9-12 Pressure Testing page 13 Valve Data pages 14-19

Introduction - DIPV Double Isolation Plug Valve Based on Serck Audco’s SUPER-H pressure balanced taper plug technology, the Double Isolation Plug Valve offers true bubble tight double block and bleed, within a single valve body. The oil and gas industry is no longer satisfied with the shut-off provided by conventional double block and bleed ball, gate or plug valves. True double isolation has become a prime requirement as safety standards are raised throughout the industry, especially where it is necessary for an operator to work downstream (or upstream) of the valve. A further advantage of...

Proven plug valve integrity - setting new standards for double block & bleed True double isolation within a single valve body COMPARED WITH GATE VALVES Same face-to-face but smaller overall. Compact design means less weight. COMPARED WITH BALL VALVES One DIPV replaces two ball valves. Less interconnecting pipework means fewer leak paths. Weight saving. Cost saving.

Typical Installations Gas Transportation - Gas Compression Station CONFIGURATION USING BALL VALVES BLEED VALVE BLEED VALVE CONFIGURATION USING DOUBLE ISOLATION PLUG VALVES DOUBLE ISOLATING PLUG VALVE BALL VALVE Oil & Gas Production - Well Heads Manifold PRODUCTION HEADER TEST SEPARATOR FLOW LINE FROM WELL HEAD

Typical Installations The valves illustrated are 8" class 1500 Double Isolation Plug Valves in 25% Cr. Duplex with hub ends. The valves are installed on a flowline header application. In this case one isolation is by electric actuator and the other isolation is by gear operator. Criteria for selection: true bubble tight isolation and space and weight saving over conventional ball or gate valves and minimum maintenance. The valves illustrated are 4" class 300 flanged in Carbon Steel and Stainless Steel. The application is on a fuel skid and both plugs on each valve are lever operated....

Main Features Principles of Operation Serck Audco Double Isolation Plug Valves feature twin Protected Pressure Balanced Taper Plugs and a centrally located bleed port, integral with the body. They are designed to give bubble tight shut off on both high and low pressure applications. This is a robust, in-line maintainable valve with low maintenance requirements. The valve body is a rigid single piece casting or forging. The blow out proof valve stems are internally assembled and retained in the body. The separate plugs are retained in the body by a bolted or threaded cover. The design...

Figure Numbering The opposite illustrates a typical figure number, if a fuller explanation is required please request Standards Sheet 0028-4001. 4 5 0 Valve Type eg. Super H DIPV Double Isolation (Twin Plug) Screwed BSP Taper Flanged RF Screwed API 5L Flanged RTJ Butt Weld End Socket Weld End V - NACE MR0175 'Wetted Parts' and Cover Bolts P - NACE MR0175 'Wetted Parts' S - Special Customer requirements Body Material Plug Material C - Case Hardened Carbon Steel J - Electroless Nickel Coated Carbon Steel (0.003'' for NACE) M - Electroless Nickel Coated Manganese Steel (LCC) T - 17-4 PH...

DIPV Design Features Same face-to-face as one valve. In-line emergency stem sealing. In-line sealant injection point. Choice of mounting positions for actuators and handwheels. Bleed port. Bleed valve flange interface.

Design Features 2'' - 4'' ASME Class 150 - 1500 Main Features (Components are shown for one plug assembly only. The adjacent plug components are identical.) Blow Out Proof Stem: Super LoMu treated, double 'D' drive for wrench. Weather Seal. Equaliser Ring: for low torque and bubble tight sealing. Plug: Metal-to-metal seating, Super LoMu treated. Pressure Balance Ball Valve. Bleed Port: integral with body. Spiral Wound Sealing Gasket. Diaphragm: stainless steel. 10 Thrust Pad. 11 Threaded Cover. 12 Cover-to-Body Sealant Injector. 13 Plug Loading Screw. 14 Protective Cap. 15 Stem Packing...

Design Features 2'' - 4'' ASME Class 2500 Main Features (Components are shown for one plug assembly only. The adjacent plug components are identical.) Key Drive Blow Out Proof Stem: Super LoMu treated. Weather Seal. Equaliser Ring: for low torque and bubble tight sealing. Slotted Plug: Metal-to-metal seating, Super LoMu treated. Pressure Balance Ball Valve. Bleed Port: integral with body. Diaphragm: stainless steel. 10 Bolted Cover. 11 Plug Loading Screw. 12 Protective Cap. 13 Stem Packing Compound Injector: renews sealing to atmosphere. 14 Graphite 'Fire Safe' Stem Seal. 15 Seat Sealant...

Design Features 4'' - 24'' ASME Class 150 - 2500 Main Features (Components are shown for one plug assembly only. The adjacent plug components are identical.) Key Drive Blow Out Proof Stem: Super LoMu treated. Weather Seal. Equaliser Ring: for low torque and bubble tight sealing. Slotted Plug: Metal-to-metal seating, Super LoMu treated. Pressure Balance Ball Valve. Bleed Port: integral with body. Diaphragm: stainless steel. 10 Bolted Cover. 11 Plug Loading Screw. 12 Protective Cap. 13 Stem Packing Compound Injector: renews sealing to atmosphere. 14 Graphite 'Fire Safe' Stem Seal. 15 Seat...

Pressure Testing Test Pressures Maximum C.W.P. VALVE RATING BODY TEST (minimum) SEAT TEST (minimum) CLASS 150 PN 20 CLASS 300 PN 50 CLASS 600 PN 100 CLASS 900 PN 150 CLASS 1500 PN 250 CLASS 2500 PN 420 API pressures are taken from API 6A, all other pressures are taken from ANSI 16.34. The test pressures from ANSI 16.34 are those relevant to Carbon Steel ASTM A 216 Gr WCB. There may not be exact equivalence between pressure in bar and in lbf/in² due to rounding (1 bar = 105 Pa). Each relevant standard defines the minimum length of time for which each test pressure is to be maintained and...

DIPV - Class 150 Dimensions in these tables are for standard trim valves and are to the nearest millimetre. Refer to Serck Audco Valves for valves for low temperature and with ENP plugs. Flange Diameter Flange Thickness (incl RF ht) Handwheel Diameter Bleed Size CL to end of Bleed Flange Face Operating Torque Weight (Approx) * Refer to Serck Audco Valves for dimensions