Daniel ™ Senior ™ Orifice Fitting Differential Pressure Flow Meters

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Daniel ™ Senior ™ Orifice Fitting Differential Pressure Flow Meters

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  Technical Guide May 2014 Daniel ™  Senior ™  Orifice Fitting Differential Pressure Flow Meters Daniel-Senior-Orifice-Fitting_Tech-Guide_FINAL_Mar-2014.indd 13/12/14 2:12 PM  Daniel-Senior-Orifice-Fitting_Tech-Guide_FINAL_Mar-2014.indd 23/12/14 2:12 PM  1 www.EmersonProcess.com Technical Guide Differential Pressure Flow Meters Overview The Daniel Senior Orifice Fitting is a dual-chamber device that reigns as the most widely used means of measurement for natural gas. With an installed base of well over one million orifice fittings worldwide, more natural gas is measured with The Daniel Senior Orifice Fitting than any other type of device. The Senior Orifice Fitting (Figure 1) saves users time and money by providing a fast, safe and extremely simple method of changing orifice plates under pressure without flow interruption, preventing unscheduled shutdowns. In addition, its dual-chamber design eliminates the need for costly piping bypasses or additional valves and fittings required with conventional orifice flange installations. The Senior Orifice Fitting meets all requirements and recommendations for accurate flow measurement of gas and liquid, including AGA-3 / API 14.3 requirements, without compromise. From duplex stainless steel fittings to carbon steel and severe service trims (Monel, Hastellloy-C and Alloy-20), Daniel delivers fittings to meet the stringent requirements of corrosive environments or specific temperature and pressure needs.The Senior Orifice Fitting requires no beta ratio range restrictions and no added uncertainty to published values. It is available in 2" through 48" flange line sizes, up to ANSI 2500, and 10,000 psi (68958 kPa) in 3" to 6" only. Proving its worth every day (1) Please consult Daniel factory for severe service and other code requirements, including low -temp, high H 2 S, high CO 2 , and special applications.(2) Hard-seat using injected grease / sealant is recommended for production applications where sand, grit and other particulate matter is present.(3) Soft-seat, greaseless seal is not recommended / intended for production applications where sand, grit and other particulate matter is commonly present (e.g., shale gas production). Typical Applications    Gas transmission / pipeline  Gas distribution  Offshore gas production and onshore, including shale   Gas plants   Floating Production, Storage and Offloading (FPSO)   CO 2  injection  Bi-directional high pressure storage Features and Benefits    Highly reliable, time proven technology   Field-repairable, reducing downtime and costs associated with shipping to a repair site   Available in compliance with ISO-5167, PED, NORSOK and other code standards / requirements (1)    Corrosion resistant and other special casting materials, including Wrought Carbon Steel (WCC, WCB), Low Temperature Carbon Steel (LCC), 316 Stainless Steel and Duplex, makes this fitting suitable for sour gas service and other special applications  Slide valve / isolation mechanism featuring a metal-to-metal seat (hard seat (2) ) with injected lubricant / sealant is standard on all Daniel Senior Orifice Fittings, providing an optimal seal in the production environment where particulate matter is common   Optional soft seat slide valve (3)  (O-ring seal without lubricant) is available in 2" to 12" sizes, up to 600 ANSI, for use with gas products such as ethylene Figure 1: Daniel Senior Orifice Fitting Daniel-Senior-Orifice-Fitting_Tech-Guide_FINAL_Mar-2014.indd 13/12/14 2:12 PM  2 www.EmersonProcess.com Mar 2014 Senior Orifice Fitting  A. Under flow conditions B. Equalize pressure  1. Open equalizer valve Operational Sequence of Removing an Orifice Plate Under Pressure (1)   D. Bleed upper chamber and lubricate valve seat  4. Close slide valve carrier (isolation mechanism) 5. Close equalizer valve and inject sealant  6. Open bleeder valve (blow-down valve)  C. Raise orifice plate  2. Open slide valve carrier (isolation mechanism) 3. Raise plate to upper chamber  (1) CAUTION:   This operational sequence is representational only and is not intended for use as a field guide to operations. NOTICE  : See operation manual and always read and follow the detailed operating instructions provided with each fitting before attempting to operate. Daniel-Senior-Orifice-Fitting_Tech-Guide_FINAL_Mar-2014.indd 23/12/14 2:12 PM  3 www.EmersonProcess.com Technical Guide Differential Pressure Flow Meters The slide valve seat and the slide valve strip are eld-replaceable or repairable (re-lapping) without removing the tting from the line, reducing downtime. E. Remove orifice plate 7. Remove clamping bar, sealing bar, and gasket  8. Remove orice plate from top chamber  Stop Pin Valve Seat Gasket Slide Valve Seat Slide Valve StripSlide Valve SpringsSlide Valve Carrier   Operating shaft and Pinion Senior Orifice Fitting Front View Valve Seat Sealing Surface Top Chamber  Daniel-Senior-Orifice-Fitting_Tech-Guide_FINAL_Mar-2014.indd 33/12/14 2:12 PM
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