FV Flash Vessel - Spirax Sarco

1 Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. Copyright 2017 Page 1 of 4TI-P404-03 EMM Issue 11FV Flash Vessel DescriptionThe Spirax Sarco FV Flash Vessel is designed and constructed to ASME VIII DIV 1 2004 + ADD06. The design is free-draining which is essential in boiler blowdown applications. ApplicationsThese vessels are particularly suited to boiler blowdown heat recovery systems where efficient separation of the Flash steam from the blowdown is essential to prevent contamination of the boiler feedtank and / or heat transfer surfaces.

2 Spirax Sarco Flash vessels are equally suited to condensate Flash steam features:-Designed and constructed in compliance with the European Pressure Equipment Regulations 2014/68 separation velocity to produce drier FV15 and FV18 shownLimiting conditionsMaximum design conditions (body) are 14 bar g @ 198 C (saturation temperature of steam). Minimum design (operating) temperature-10 CCold hydraulic test pressure in accordance with European Pressure Equipment Directive 2014/68 : Maximum design Pressure and Temperature can be further limited, lower than that stated on the nameplate depending on the chosen flange rating of the bar g @ 198 CClass A15 bar g @ 198 CNote: These vessels will withstand full vacuum and pipe connectionsConnections available as standard:Screwed connections to BS 21 connections to EN 1092 : Vessels are available flanged to ASME Class 150 or 300, or screwed NPT.

3 Page 2 of 4FV Flash VesselTI-P404-03 EMM Issue cylinderAST M A10 6 BC. Max. capASTM A234 WPBC. Max. Nozzle - Half couplingAST M A10 5 NC. Max. Nozzle - Full couplingAST M A10 5 NC. Max. Nozzle - Flange ASTM A516 -70C. Max. Nozzle - PipeAST M A10 6 BC. Max. Blanking plug AST M A10 5 NC. Max. Wrapper plateASTM A516 - 60C. Max. Name-plate bracketBS EN 10028-2 P265 GHC. Max. Support foot/gussetBS EN 10025 S275 Condensate/residual blowdown outletModel FV15 and FV18 shownFlash steam outletInlet365810527917325 Page 3 of 4FV Flash VesselTI-P404-03 EMM Issue 11 How to sizeUse the chart below to select the appropriate Flash Vessel . It is necessary to know the pressure on the steam traps or boiler pressure in the case of blowdown heat recovery, the Flash steam pressure (desired or existing), and the condensate or blowdown 1: (solid lines)A boiler plant operating at 12 bar g has a TDS control blowdown flowrate of 2 500 kg/h (3 boilers at 833 kg/h each).

4 The Flash steam from the blowdown is to be added to the low pressure steam system operating at 1 bar boiler pressure move horizontally to Flash steam pressure - vertically to blowdown flowrate in kg / h - curve to right-hand scale and across to same Flash pressure - upwards to Flash Vessel size. Select Flash Vessel - in this case an FV8 is 2: (dotted lines)A plant operating on steam at 11 bar g condenses 4 000 kg/h of steam. Flash is to be recovered at bar pressure on steam traps move horizontally to Flash steam pressure - vertically to condensate flowrate in kg/h - curve to right hand scale and across to same Flash pressure - upwards to Flash Vessel size.

5 Select Flash Vessel - in this case an FV12 is required. Flash steam pressure bar gPressure on steam traps orboiler pressure for blowdown applications bar gFlash Vessel sizeFlash steam pressure bar gCondensate or blowdown flowrate kg/hFV18FV15FV12FV8FV6 Example 1 Example 2 Page 4 of 4FV Flash VesselTI-P404-03 EMM Issue 11 Dimensions/weights (approximate) in ins, mm and kgFV6FV8FV12FV15FV18A168219324406457B104 210262303329C370413418390514D62066366864 0764E1 2251 3911 4001 2751 521F230281411492544G2"DN80DN100DN150DN15 0H2"2"2"DN80DN80J2"DN80DN100DN150DN150K" """"L "1"1 "1 "2"M2"2"2"2"2"Weight 4576130150193 InstallationThe Vessel should be mounted with the Flash steam outlet at the top, and connected as indicated below.

6 Each Vessel incorporates a " screwed boss for a pressure gauge. For drainage, it is recommended that a float trap is fitted. A safety valve connection is provided on the Vessel . It should not be assumed that the safety valve will be the same size as the connection. Safety valve sizing and selection should be in accordance with National and Local valve connectionInstallation supportsCondensate/ residual blowdown outletFlash steam outletPressure gauge connectionInspection coverInspection coverInletFV6FV8 and FV12FV15 and FV18 LGDCBJKELGDCHAFBJKMELGDCBJKMEHAFHAFHow to orderExample: 1 off Spirax Sarco FV6 Flash Vessel having screwed BSP connections. The unit is to be constructed to ASME VIII DIV 1 2004 + FV15 and FV18 show