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Triple Offset Butterfly Valve
GZP 3-offset butterfly valves are manufactured and modified to the latest edition of API609, BS5155, ASME B 16.34 .
Description
3-Offset Metal Seat Butterfly Valve
GZP 3-offset butterfly valves are manufactured and modified to the latest edition of API609, BS5155, ASME B 16.34 .And passed the fire resistance inspection standards of API 607, API6FA and BS6755.All valves from GZP valves are strictly 100% tested before shipment to guarantee zero leakage.
Features & Benefits
Bi-directional tightness, 1.1 times in flow side pressure and 1.0 times in reversed flow side pressure for size DN80~DN600 and pressure rating PN6~PN40.
Firesafe Certified to API 607 4th edition BS6755 Part 2 and API 6FA Sizes 3'' (80mm) to 96'' (2500mm)
Anti-blowout stem Internal is standard External to API 609 optional
Triple Offset Geometry Provides non-rubbing motion throughout full 90˚ rotation eliminating unnecessary wear and prolongs life of seat and seal.
Pressure ratings ANSI 150 through 300 Ib.Zero leakage Bi-directional shut-off to API 598, Zero Leakage Capability.
Ease of maintenance Field replaceable seat and seal ring reduces maintenance costs.Bearing protectors Bearing protectors are available for the more arduous duties. Live loaded packing Is available as an option.
Quality assurance system Approved by ISO 9001, CE and API 6D
Operators Valves can be supplied with manual, electric, pneumatic or hydraulic actuators.
Fail-safe systems for emergency operation are also available.
Technical data | |
Design | API609, BS5155,ASME B 16.34,DIN3354, |
Face to Face | ASME B16.10,EN 558,DIN 3202 |
Pressures range | ANSI 150 ~ANSI 900 ,PN6~PN150 |
Size range | DN80(3") ~DN2500 (96") |
Body Material | Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel.etc. |
NACE MR-01-75/NACE MR-01-03 Special Requirements | |
Face to Face | ASME B 16.10,EN 558,DIN3202 |
Fange,Wafer,Lug Ends | ASME B16.5 ≤ DN600 (24") ASME B16.47 A ≥ DN650 (26") |
BS 4504,DIN 2543-2545,EN1092 | |
Butt-Weld BW Ends | ASME B16.25 ,DIN 3239,BS 2080, EN 12627 |
Temperature range | -196°~ 600°C |
Design Feature | |
Construction | Triple offset type |
Disc Type | oval-shaped |
Seat Sealing | Metal seat ,soft seat ,double sealing performance. |
Valve Operation | Gear, pneumatic,Hydraulic,Electric actuators. |
By pass,locking devices,extended stem,etc | |
Fire Safe Design | API 607, API6FA ,BS6755 |
Inspection and Test | |
Visual Inspection | MSS SP55 |
Material Inspection | PMI Test----Chemical Analysis |
HB Test---Hardness Test | |
UT---Ultrasonic Test | |
RT---Radio-graphic Test | |
MT---Magnetic Test | |
NDT Test Non-destructive | |
Dimension inspection | According to drawings |
Valve Inspection and Test | API 598,DIN 3230,EN 12266,BS 5146 |
What is the difference between double offset and triple offseat butterfly valves?
The main difference between a double and triple offset valve is the number of offset shafts; a triple offset valve has three.
Two of the offsets are placed in a similar position to the double offset butterfly valve, while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat.
The triple offset butterfly valve is used in similar industries as the double but more demanding applications.
Why use a triple offset butterfly valve?
A triple offset butterfly valve is used in applications where a metal seat is required. A tight shut-off/on or a quarter turn actuation is desired, including high temperature and high-pressure applications.
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