Double block and bleed, dual chamber orifice fitting
FPD220

FPD220 is dual-chamber orifice fitting with double block and bleed (DBB) isolation, suitable for fiscal (custody transfer) applications.  These fittings enable orifice plates to be safely inspected and / or replaced without removing the fitting itself from the pipeline.

Brochure: Differential pressure flow meters

Applying over 100 years of DP flow expertise to industrial processes
Brochure: Trusted measurement solutions for downstream oil and gas operations

Enhancing production efficiency
UK Government Publication: The safe isolation of plant and equipment

How to isolate plant and equipment safely and reduce the risk of releasing hazardous substances during intrusive activities such as maintenance
Overview
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Overview

A dual-chamber orifice fitting with double block and bleed (DBB) isolation, suitable for fiscal (custody transfer) applications in locations where
  – proven isolation is required and
  – pipeline will not/cannot be shut down (or bypassed and isolated) or depressurised for service

FPD220 offers dual isolation, with two independent chamber seals, ensuring maximum safety during live orifice plate changes or during routine inspection.  This is visually confirmed by two pressure gauges integrated into the unit.  

Data

  • Proven Dual isolation (DBB) of the process from the environment during orifice plate changes
    – no need to isolate the complete metering  stream 
  • Minimized venting of gas volume 
    – only the small volume contained within the meter upper chamber is vented 
  • Substantial saving in operating costs and production
    – potential annual savings of $50k per stream in reduced downtime 
    – typically only 30 minutes to exchange a plate instead of many hours
  • Elimination  of parallel streams or bypass lines 
    – less maintenance and less inspection time 
    – reduced weight and cost
    – a higher level of visible safety

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