Short Description

Model No.: Triple-Offset-Butterfly-Valve

China Valves Manufacturer www.sfutube.com offers Triple Offset Butterfly Valve.

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Key Specifications / Features

Type: triple offset butterfly valve
Material: A536,A126,WCB,LCB,CF8,CF8M.CF3.CF3M,CN7M,904L
Size: 1″ (DN25) – 80″ (DN2000)
Pressure:  Class150-1500LBS (PN16-PN160)
Connection type: Wafer Triple Offset Butterfly Valve, Lugged Triple Offset Butterfly Valve, Flanged Triple Offset Butterfly Valve
Kind of drive: wrench, gear, electric actuators and pneumatic actuators
Operating temperature: -100℃ – 190℃
Working medium: water, gas, oil,concrete, Sulfuric acid and hydrochloric acid
Testing: API 598, ISO 5208
Pressure-Temperature Rating: API 609
Value Design: ASME B16.34, MSS-SP-68
Anti-Blow-Out Stem: API 609
Facc-to-Face: API 609, MSS-SP-68, ISO 5752
Fire Safe: API 607
Low Fugitive Emission Gland Packing System: DIN3780, MSS-SP-143
Marking: MSS-SP-25, API 609
Top Mounting: ISO 5211
Suitable Flange:

  • ANSI 150Ib, 300Ib
  • DIN: PN10, 16, 20, 25, 40, 50
  • JIS: 10K, 16K, 20K, 30K, 40 K


Standard

  • Design Standard: API 609, MSS SP-67, MSS SP-68, BS 5155
  • Face to Face: API 609, ASME B16.10, BS 5155, EN1092
  • End Connection: DIN PN10/16/25, ANSI B16.1, BS4504
  • Inspection and Test: API 598

What is a Triple Offset Butterfly Valve?

Triple offset butterfly valves (TOBV) are available in three different sets. Two offsets are in the center and a third is on the seal face, forming a conical shape for the disc and seat. Triple offset valves are used where a gas tight seal is required, the system is at high temperature and a zero leakage hard seal is required.
The first offset is supplied to the central axis of the sealing face, on which the disc rotates 360 degrees around the central axis, providing a seal by deforming the soft seal, resulting in total friction.
The second offset refers to the position of the axis relative to the center line of the hole. During operation, it creates a CAM action that lifts the seat away from the seal, creating friction during the first 10 degrees of opening and the last 10 degrees of closing.
The third offset is the geometry of the closed primitives. Each seal element is machined to a tapered offset profile, forming a right taper. This ensures frictionless stroke throughout the working cycle. Contact is made only when the 90° Angle acts as a mechanical stop on the final closing point; This will cause the disc seat not to overshoot.
When these triple offsets are supplied together, the valve provides a continuous sealing face with minimal wear between the sealing faces and provides a lasting seal throughout the life of the valve. Additionally, disc adhesion and bonding are reduced and less operating torque is required due to disc’s optimized seat Angle.

Classification by Connection Type

  • Based on the connection there are different types of Triple offset butterfly valves.
  • Wafer type ends.
  • Lug type ends.
  • Both flanged ends.
  • Butt-welded types end.

Wafer Type: The wafer type triple offset butterfly valves was built to keep a tight sealing, protecting against bi-directional pressure differentials, to prevent any backflow in devices that were built for uni-directional flow. This is done by the use of a tightly fitted cap, such as an O-ring, gasket, precisely machined, along with a smooth valve face on the downstream and upstream parts of the valve.
Lug Type: The lug type triple offset butterfly valve configuration is similar to the 3-piece ball valve in which one end of the pipeline can be replaced without impacting the other side of the valve. This can be achieved with threaded inserts, flanges, and two sets of lugs (bolts) that do not use nuts so each flange has its bolts. It is also important to remember that you do not need to shut down the whole device to inspect, clean, repair, or replace the lug butterfly valve.
Flanged End Type: The flanged type eccentric butterfly valve has a flange at both ends of the valve to be attached with pipe flanges. This type of end connection is used for the very large size of butterfly valve.
Welded End Type: The welded end type butterfly valve is used where system is under very high pressure. These types are generally used for small size butterfly valves.

How Does Triple Offset Butterfly Valve Work?

The triple offset butterfly valve does not operate like a traditional butterfly valve, which while turning of the lever, turns sideways to allow the media to pass, like handwaving. The triple offset type works like a globe valve, where the disk moves a bit like a cone, going up and down.
A strong seal occurs as the cone moves to become a circle. There is no drag when the seat comes into contact with the disk due to the angled positioning of the disk in relation to the surface.

Application & Benefit of Triple Offset Butterfly Valve

Triple Offset Butterfly Valves are important for applications where bubble-tight sealing is needed. In some applications, bubble-tight sealing cannot be accomplished by using triple offset butterfly valves.
Some processes do not adapt themselves well to conventional butterfly valves, such as applications containing harsh chemicals or mediums with small particles susceptible to clogging valves and pipes. In such systems, Triple Offset Technology gives superior advantages where cam action and right-angled conical sealing ensures that the metal seal elements will never come in contact until its final degree of closing.
Here metal to metal sealing provides bubble-tight shutoff which results in no leakage performance.
Friction-free stroking is available throughout the cycle which allows the operation with low torque and extends the valve life.
Valve has no cavities between the sealing elements due to which clogging is eliminated which results in low maintenance and in turn extends the valve life.

HTB13mDNh3fH8KJjy1zcq6ATzpXaB - Triple Offset Butterfly Valve

The triple offset butterfly valve (TOBV) meets the demanding needs for two-way shutoff to deliver high quality isolation for big range of applications includes power and steam, tank and terminal, petrochemical, upstream production, refining, and gas process operations.
Rigorous testing and advanced engineering

What is a Triple Offset Valve Mountain States Engineering Controls Crane FKX 9000 - Triple Offset Butterfly Valve

From: chemicalengineeringworld.com

As a member of the verified Cameron quarter-turn butterfly valve portfolio, every triple offset butterfly valve (TOBV) undergoes arduous qualification and testing processes that simulate the valve life cycle. That’s however you recognize it’s been designed and built with the producing excellence and commitment that distinguish all Cameron product lines.
Worldwide footprint and support
Our world support and strategic networks brings the triple offset butterfly valve (TOBV) wherever it’s required, once it’s needed—fully designed, tested, qualified, and backed by Cameron, the leader in valves manufacturing.

Triple Offset Butterfly Valves - Triple Offset Butterfly Valve

Specifications of triple offset butterfly valve

Description
BUTTERFLY VALVE
High Performance
Triple Offset Metal Seated Fire Safe
Cryogenic also available
Design Code API 609 / EN593
Size Range NPS 3” – 96” / DN 80-2400
Maximum Pressure /Rating 150# to 1500#
Design Temperature -196°C to +600°C (MOC Dependant)
End Connections Wafer / Lug / Double Flanged / Butt-Weld
Body Seat
Metal + GRAPHITE
Solid Metal
Seat Leakage
Bi-Directional Bubble Tight Shutoff (CL.150 – 600)
Uni-Directional Bubble Tight Shutoff (CL.900 -1500)

Material of Construction

Body Carbon Steels inc. Low Temp
Austenitic/ Super Austenitic Stainless steels
Aluminium bronze
Duplex/ Super Duplex alloys (1A-6A)
Titanium
Hastelloy B, C, Inconel
Monel, Alloy 20
Others upon request
Shaft AISI 410, AISI316, 17-4Ph, Monel K500, UNS32760, Titanium
Seat SS304 / SS316 / SS316L / Inconel / Titanium
Hard-facing Stellite Gr. 6 / Gr.21 / 13% Cr. Weld Overlay

We focus on valves in standard and special materials as customer request.

Our main materials show as the follows:

Any request for other materials, please contact our machinery sales or engineering team on email.

Special Material Titanium or Titanium alloy series Titanium(Gr.2,Gr.3,Gr.5,Gr.7,Gr.12)
Nickel alloy series Ni6,Ni200,Ni201
Monel 400,Monel k500
Inconel 600/625/690/750
Incoloy 800/825/800H/800HT
Hastelloy B3/C/C4/C22/C276/G30
Zirconium alloy series Zirconium 702/703/705
Bronze alloy series Nickel aluminum bronze C95800
(Super)Duplex Steel ASTM F51/F53/F55
Other corrosion resistance Alloy 20,AISI 321,310,904L
Normal Material Carbon Steel WCB,WCC,LCB,LCC,A105N,LF2
Alloy Material(Low Temperature) LC1,LC2,LC3,LF3
Alloy Material(High Temperature) WC1,WC6,WC9,C5,C12A
Stainless Steel CA15,CF8,CF8M,CF3,CF3M

Drawing of triple offset butterfly valves

butterflytripleoffset 01 - Triple Offset Butterfly Valve

All dimensions are in “mm” unless noted otherwise.

Dimensions of Flanged Class 150 Triple Offset Butterfly Valves

Size
NPS
A D E F H
Long
pattern
Short
pattern
80 279 247 203 114 52 142
100 326 294 229 127 52 142
150 346 314 267 140 52 196
200 408 369 292 152 67 233
250 443 399 330 165 89 286
300 499 442 356 178 123 338
350 576 519 381 191 123 338
400 628 551 406 216 154 363
450 671 610 432 222 59 484
500 734 640 457 229 97 516
600 835 742 508 267 181 567
750 1033 1033 610 318 237 621
900 1201 1201 711 330 292 730

Dimensions of Flanged Class 300 Triple Offset Butterfly Valves

Size
NPS
A D E F H
Long
pattern
Short
pattern
80 279 247 282 114 52 142
100 326 294 305 127 52 142
150 384 315 403 140 67 67
200 438 394 419 152 89 67
250 531 476 457 165 123 338
300 584 508 502 178 154 395
350 620 559 762 191 60 472
400 659 593 838 216 97 503
450 732 639 914 222 181 567
500 780 510 991 229 181 599
600 950 856 1143 267 237 692
750 1093 1018 1143 451 292 1015
900 1252 1119 1727 508 356 1071

Dimensions of Flanged Class 600 Triple Offset Butterfly Valves

Size
NPS
A D E F H
Long
pattern
Short
pattern
100 335 310 432 191 67 223
150 417 374 559 210 89 248
200 543 467 660 230 154 387
250 584 523 787 249 138 464
300 651 558 838 270 181 496

butterflytripleoffsetwaferlug 01 - Triple Offset Butterfly Valve

Dimensions of Wafer Lug Class 150 Triple Offset Butterfly Valves

Size
NPS
A E F H
80 279 48 52 142
100 326 54 52 142
150 346 57 52 196
200 408 64 67 233
250 443 71 89 286
300 499 81 123 338
350 576 92 123 338
400 627 102 154 363
450 671 114 594 484
500 734 127 97 516
600 835 154 181 567
750 1033 191 237 621
900 1201 203 292 730

Dimensions of Wafer Lug Class 300 Triple Offset Butterfly Valves

SIZE A E F H
80 279 48 73 142
100 326 54 73 142
150 405 59 108 67
200 438 73 108 67
250 531 83 133 338
300 584 92 133 395
350 620 117 194 472
400 659 133 194 503
450 732 149 194 567
500 780 159 194 599
600 950 181 165 692
750 1229 241 165 1015
900 1305 241 229 1071

Dimensions of Wafer Lug Class 600 Triple Offset Butterfly Valves

Size
NPS
A E F H
100 335 64 67 223
150 417 78 89 248
200 543 102 154 387
250 584 117 138 464
300 651 140 181 496

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