Five Eccentric Butterfly Valve
Products Description
The NEWLOTOKE Five Eccentric Butterfly Valve is a next-generation high-performance valve engineered for demanding conditions such as ultra-high pressure, extreme temperatures, and zero-leakage applications. Based on advanced five-offset geometry, it offers a full metal-to-metal sealing structure with reliable bidirectional pressure resistance, ideal for critical pipelines in oil, gas, chemical, and power industries.
Unlike traditional triple-offset butterfly valves, the five-offset design introduces a more stable, low-torque structure while effectively handling thermal expansion and contraction under temperature ranges from -196°C to 650°C. This results in a significantly longer service life and reduced maintenance cost. The valve adopts a circular metal sealing ring, optimized shaft offset ratios, and robust sealing surfaces that ensure zero leakage (Class V or higher) even under ANSI 900LB pressure conditions.
Product Detail
|
Item |
Specification |
|
Brand |
NEWLOTOKE |
|
Product Name |
Five Eccentric Butterfly Valve |
|
Model |
DS345Y |
|
Size Range |
DN50–DN2000 (2"–80") |
|
Pressure Rating |
10LB to 900LB / ANSI 150#–900# |
|
Temperature Range |
-196°C to 650°C |
|
Connection Types |
Lugged / Double Flanged / Welded |
|
Material Options |
WCB, LCB, CF8, CF8M, CF3, CF3M, 2205, 2507, S32760, MONEL, etc. |
|
Seal Structure |
Full metal sealing – seat & ring spray-welded with hard alloy |
|
Flow Direction |
Bidirectional |
|
Leakage Class |
Zero leakage (Class V or better) |
|
Driving Methods |
Manual / Pneumatic / Electric / Hydraulic |
|
Standard Compliance |
API / ANSI / ISO |
|
Maintenance |
On-site disassembly, full component replaceability |
|
Availability |
Customizable per project, common sizes in stock |
Product Advantages & Features
|
Feature |
Description |
|
Five-Eccentric Design |
Includes sealing arc offset, circular plane offset, axial offset, radial offset, and cone apex offset-ensures smooth sealing engagement and minimal friction. |
|
Full Metal Seal |
Both the seat and sealing ring can be hard alloy-coated, achieving reliable zero-leakage sealing. |
|
Wide Temperature Range |
Designed to operate from cryogenic -196°C to high-temp 650°C without deformation or leakage. |
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High Pressure Capability |
Rated up to ANSI 900LB, ensuring stable operation in extreme pressure pipelines. |
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Low Operating Torque |
Reduced radial eccentricity and optimized sealing arc significantly lower the opening torque. |
|
Replaceable Seal Ring |
Enables on-site seal replacement, lowering maintenance and operational costs. |
|
Bidirectional Sealing |
Handles forward and reverse pressure equally, offering versatile installation. |
|
API Blowout-Proof Stem Design |
Valve stem includes blowout prevention structure for enhanced safety. |
|
Spline Disc-Stem Connection |
Uniform force distribution, no shear pin risk, easy disassembly and assembly. |
|
One-Piece Stem Design |
Prevents thermal expansion mismatch between disc and stem, improving stability. |
|
Constant Pressure Packing Design |
Equipped with disc-spring-loaded self-adjusting packing to prevent medium leakage. |
|
Energy-Saving Flow Path |
Single-stem design reduces fluid resistance, lowers energy consumption and disc torque. |
|
Fully Field Serviceable |
Entire valve can be disassembled and reassembled on site; all parts are replaceable. |
Why choose us?
Used at the project site
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FAQ
|
Question |
Answer |
|
What is a Five Eccentric Butterfly Valve? |
It's an advanced butterfly valve with five offset axes to minimize friction and achieve zero leakage. |
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What are the key applications? |
Suitable for oil & gas, petrochemical, power plants, and pipelines requiring high temperature/pressure performance. |
|
What's the advantage over triple-offset valves? |
Better sealing under extreme conditions, lower torque, longer service life, and wider material compatibility. |
|
Can the sealing ring be replaced on site? |
Yes. The design supports field maintenance and replacement, reducing downtime and maintenance cost. |
|
Does it support bidirectional flow? |
Absolutely. NEWLOTOKE five-eccentric valves are designed for full bidirectional pressure handling. |
|
What is the leakage rating? |
Class V or better (zero visible leakage under test conditions). |
|
Are customized sizes and materials available? |
Yes, we support customization from DN50 to DN2000 and offer various materials per application. |
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