Double Block Bleed TOSV
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Double Block & Bleed TOSV Triple Offset Segment Valves
Transcript of Double Block Bleed TOSV
Double Block & Bleed TOSV
Triple Offset Segment Valves
Double Block & Bleed Triple Offset Segment Values
For over 40 years Solent & Pratt hasbeen at the forefront of the design,development and manufacture of highquality butterfly valves for engineeringprojects around the world. An absolutecommitment to outstanding quality andreliability is the key of our success,particularly in environments such as theoil and gas, chemical, petro-chemical andpower generation industries.
New design provides a high integritydouble seal with bleed facility between
Any seapage through the first seal drainsthrough hole between seals
Drain tap to check for leakage
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Double Block & Bleed Triple Offset Segment Values
Applications
As safety and environmental issues have becomeof greater concern to mankind, the need forassured valve shut off providing absolute andverifiable isolation are regularly becoming thestandard specification for critical applications.
Typical areas of application include offshore andonshore petro-chemical production including,gas injection, water injection, oil and gastransmission lines including airport fuellingfacilities and other areas where flammable andtoxic emissions are unacceptable.
Design
Previous common practice has been to use twovalves (Fig 1), such as plug or ball valve designs,in series with a bleed facility located betweenthem in order to establish the sealing integrity ofthe upstream valve. This configuration is far fromoptimum as more space is required, withconsiderable extra weight quite apart from theadditional maintenance requirements of havingtwo valves and the extra associated costs.
The Solent & Pratt Double Block and Bleeddesign (Fig 3) utilises our well established,patented triple offset segment valve (TOSV).Two seals are incorporated on the disc segmentthus providing sequential sealing. Thedownstream seat is not spring loaded, as is thepractice for trunnion mounted pipeline valves(Fig 2), which are also very heavy and expensive.Sealing integrity is therefore maintained shouldthe upstream seat fail. When the valve is closeda channel between the two seats connects witha purge or bleed port in the valve body which isconnected to an external outlet where an isolationvalve or relief valve may be fitted for manual orautomatic bleed. This compact Double Blockand Bleed Design negates the need for usingtwo valves in series.
Fig 1Conventional Double Block & Bleed installation. Two valves (1) and(2) plus spool piece (3) with bleed facility (4).
Fig 2Single trunnion supported ball valve is a heavy and expensive option
Fig 3Double Block & Bleed TOSV saves space, weight and costs.
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Double Block & Bleed Triple Offset Segment Values
• Inherently Firesafe primary metal/metal sealingcertified to API 607
• Shut off class API 598. Zero leakage shut offavailable in both directions.
• Replaceable body seat and laminated disc seal.
• Triple offset Design (non-rubbing).
• Internal anti-blowout stem standard. External toAPI 609 optional.
• Materials of construction available to NACErequirements.
• Wafer, lugged, double flanged and butt weld endsavailable.
• ANSI 150, 300, 600, 900 & 1500 with fully rated trims.
• Quality Assurance Systems approved to ISO 9001.
• Patented in UK with worldwide patents pending.
• Size range 6” (150mm) to 84” (2100mm) ANSI 150,300 & 600.
• Size range 6” (150mm) to 36” (900mm) ANSI 900& 1500. Large sizes on request.
Triple Offset SegmentValve (TOSV) Geometry
The shaft is offset in two directions. The disc is asegment taken from a cone where the apex is offsetfrom the centre line of the valve. No interference(rubbing) occurs between disc (segment) and seatmaking it ideal for metal seated valves.
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Results of Computational Fluid Dynamics (CFD) analysisshowing velocity contours.
ZeroInterference
Dimensions
Notes1 Dimensions I represents the maximum swing thro ofthe blade into the pipework.
2. 150Ib & 300Ib detailed. For 600, 900 & 1500Ib referto Solent & Pratt for details.
Body stylesWafer flangeless, lugged (through drilled and tapped),double flanged and top entry butt weld ended body styleare available.
Flange standardsAll flange standards can be accommodated includingANSI, API, MSS, BS, PN and ISO.
Face to face dimensionsFace to face dimensions shown are to BS.5155. Optionsinclude ANSI B16.10 and API 6D. Non standarddimensions are available on request.
OperatorsValves can be supplied with manual, electric, pneumaticor hydraulic operators. Fail-safe systems for emergencyoperation are also available.
MaterialsCarbon Steels, 316 S/S, Duple S/S. 6MO S/S, SuperDuplex, Bronze, Monel, Hastelloy B & C, Titanium,Zirconium, Incoloy.
Class 150# range (dimensions in mm)
Class 300# range (dimensions in mm)
Valve sizeInches mm
Gearbox size Dim. Dim. Dim. Dim. Dim. Dim. Dim. Dim. Dim. Wt.A B C D E F G H I Kg.
24 600
20 500
18 450
16 400
14 350
12 300
10 250
8 200
6 150
MJF50/S5/R24
MFF57/S3/R24
M16/R30
M15/R30
M14/R24
M14/18
M12/18
M12/R12
M10/R8
267 133.5 470 705 610 610 97 526 496.6 725
229 114.5 415 587 525 610 60 496 401.1 524
222 111 370 550.5 474 762 154 427 343.2 380
216 108 340 496 440 762 123 492 292.9 317
190 95 315 456 412.5 610 89.5 389 254 233
178 89 285 421 377.5 457 89.5 329 271.5 190
165 82.5 240 366 327 457 67 262 166.7 136
152 76 200 329 290 305 67 293 107.4 96
140 70 170 282 250 200 52 175.5 16.2 62
28” (700mm) through 84” (2100mm) refer to factory
28” (700mm) through 84” (2100mm) refer to factory
Typical metal seated Double Block & Bleed TOSV envelope dimensions 6” (150mm) - 24” (600mm)
Valve sizeInches mm
Gearbox size Dim. Dim. Dim. Dim. Dim. Dim. Dim. Dim. Dim. Wt.A B C D E F G H I Kg.
24 600
20 500
18 450
16 400
14 350
12 300
10 250
8 200
6 150
MLF60/D12/R30
MLF60/D12/R18
MJF30/S5/R24
MFF36/S5/R24
M16/R36
M15/R30
M15/R24
M14/R18
M12/R12
267 133.5 520 801 708 762 237 651 496.6 1120
229 114.5 453 678 585 457 237 581 401.1 841
222 111 408 641 564 610 97 525 343.2 649
216 108 365 572 510 610 52 494 292.9 501
190 95 335 534 457 914 154 467 254 383
178 89 305 466 410 762 123 402 271.5 282
165 82.2 260 415 359 610 123 366 166.7 207
152 76 220 364 320.5 457 89.5 354 107.5 130
140 70 190 296 257 305 67 229.5 16.5 89
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Double Plug Valve, 8” (200mm) 360kg 792lbs 2single body design
Block & Bleed Seals
The special block and bleed seal configuration(Fig 4) consists of two metal laminate seals withan intermediate bleed channel which connects tothe bleed purge port in the valve body when thedisc/segment is in the closed positions.
24” (600mm) Disc showing the results of a finite element stressanalysis carried out by Solent & Pratt’s Design Department
Weight
Description SizeWeight (typical)ANSI 300Lb
Number of Actuatorsfor Automation
Solent & Pratt 8” (200mm) 90kg 198lbs 1Double Block & Bleed TOSV
2 Butterfly Valves & spool 8’ (200mm) 195kg 429lbs 2bleed piece
Single trunnion Bal l Valve 8” (200mm) 255kg 561lbs 1with bleed facility
2 Ball Valves in series 8” (200mm) 525kg 1115lbs 2and spool bleed piece
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Quarter Turn - TOSV™Triple Offset Segment Valves
Double Block & Bleed TOSV,Triple OffsetSegment Valves
R-SeriesResilient SealButterfly Valves
E-Series, Ebonite LinedButterfly Valves
T-Series,PTFE SealedFiresafe Valve
Cryogenic TOSV, TripleOffset Segment Valves
Quarter Turn - TOGV™Triple Offset Gate Valves - MetalSealing withZero Leakage
Additional Products
TOSV/DBB/08/015
Other product ranges available from Solent & Pratt include:
• R-Series Resilient Seal Butterfly valves. Sizes: 2” (50mm) to 84” (2100mm)
• E-Series Ebonite Lined Butterfly valves. Sizes : 3” (80mm) to 84” (2100mm)
• T-Series High Per
formance Butterfly valves, Teflon - sealed firesafe.
Sizes: 3” (80mm) to 48” (1200mm)
• TOSV Quarter Turn series. Sizes: 3” (800mm) to 84” (2100mm).
Temperature range up to 1292˚F (700˚C)
• TOGV Gate Valve Series. Sizes: 3” (80mm) to 24” (600mm).
Temperature range to up to 1292˚F (700˚C)
• TOSV Double Block and Bleed series. Sizes: 6” (150mm) to 84” (2100mm).
Temperature range up to 932˚F (500˚C)
• TOSV Cryogenic series. Sizes: 3” (80mm) to 84” (2100mm).
Temperature range down to -320˚F (-196˚C)
• Control Butterfly Valves. Actuated for both isolation and control duty.
While this information is presented in good faith and believed to be accurate, Solent & Pratt, A Division of Curtiss-Wright Flow Control (UK) Ltd., does notguarantee satisfactory results from reliance on such information. Nothing contained herein is to be construed as a warranty or guarantee, expressed or implied,regarding the performance, merchantability, fitness or any other matter with respect to the products, nor as a recommendation to use any product or processin conflict with patent. Solent & Pratt, A Division of Curtiss-Wright Flow Control (UK) Ltd., reserves the right, without notice, to alter or improve the designs orspecifications of the products described herein.
Solent & Pratt
A Division of Curtiss-Wright Flow Control (UK) Ltd.
Corporate Headquarters
202 St. Andrews Road, Bridport, Dorset DT6 3BS
Phone: +44 (0) 1308 422256
Fax: +44 (0) 1308 427760
E-mail: [email protected]
Website: www.cwfc.com
U.S.Sales Office
10195 Brecksville Road
Brecksville, OHIO
44141, U.S.A.
Phone: 440-838-7690
Fax: 440-838-7699
E-mail: [email protected]
Website: www.cwfc.com
For a listing of worldwide offices and representatives,
visit out website at www.cwfc.com
