Triple Eccentric Butterfly Valve

Trusted Triple Eccentric Butterfly Valve Manufacturer

NTVAL provides durable Triple Eccentric Butterfly Valves designed for efficiency in large-scale applications. With a unique design to minimize wear and extend lifespan, our valves offer optimal performance in tough environments. Choose NTVAL for precision engineering and reliable solutions.

Reliable Triple Eccentric Butterfly Valve

Quality Control

The PMI test confirms that the triple eccentric butterfly valve’s materials match the required specifications, maintaining reliable performance standards.

PMI Test

The sealing test examines the valve’s closure to prevent leaks, verifying it holds pressure effectively in various flow control applications.

Sealing Test

The low emission test detects any potential leaks, helping to prevent the release of harmful gases or liquids into the environment.

Low Emission Test

The impact test assesses the valve’s ability to withstand sudden force or stress, offering durability in heavy-duty settings.

Impact Test

The dimension inspection measures each part’s accuracy, checking all components fit together precisely for smooth valve operation.

Dimension Inspection

The painting thickness test verifies the coating, providing corrosion protection and extending the valve’s longevity in tough environments.

Painting Thickness Test

PT, or penetrant testing, identifies surface cracks and other small flaws, revealing areas that may need additional improvement.

PT

The material inspection checks the strength and quality of raw materials, confirming their capability to handle pressure and temperature.

Material Inspection

Our Valve Applications in Key Industries

Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.

Triple eccentric butterfly valves resist corrosion and handle high-pressure fluids, an excellent choice for controlling flow in chemical processing.

Chemical Processing

In the petrochemical industry, these valves manage the flow of oil and gas with precision, even under intense pressure and temperature conditions.

Petrol Chemical

Triple eccentric butterfly valves withstand extreme temperatures and high radiation levels, for reliable performance in nuclear and power generation environments.

O.P.G & Nuclear

The pulp industry uses these valves to control thick, abrasive materials like slurry, offering durable and smooth operation in demanding processes.

Pulp

Mining applications require strong, abrasion-resistant valves, and triple eccentric butterfly valves perform well, handling tough materials and heavy-duty conditions.

Mining

In water and sewage systems, these valves manage large fluid volumes, providing reliable control for continuous and efficient operation.

Water & Sewage

Triple eccentric butterfly valves regulate steam flow, making them ideal for managing pressure and temperature in extensive steam networks.

Steam System

In boiling systems, these valves control hot water and steam flow, for stable and safe operation in high-temperature environments.

Boiling System

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Definition and Types of Triple Eccentric Butterfly Valves

Triple eccentric butterfly valves are specially designed to provide excellent sealing. They achieve this by incorporating 3 offsets in their design, which allows the valve to close tightly. The valve has a conical metal seat and a sealing disc that moves away from the seat to improve sealing effectiveness. Here are the 2 main types:

Metal-Seated Triple Eccentric Butterfly Valves

These valves have both a metal seat and a metal sealing disc. They are highly effective at sealing and can handle high temperatures and corrosive fluids, making them suitable for demanding environments.

Soft-Seated Triple Eccentric Butterfly Valves

These valves use softer materials like rubber or PTFE (a type of plastic) for the seat and sealing disc. They provide a tight seal that prevents leaks, making them ideal for applications where a bubble-tight shut-off is needed.

Working Principles of Triple Eccentric Butterfly Valves

Triple eccentric butterfly valves work using a special design called the triple offset. This design means that the disc, which is the part that blocks or allows flow, moves in a way that prevents rubbing against the seat. Instead, it moves like a cam, which helps the valve seal tightly without wearing out the parts.

When the valve is fully open, the disc moves entirely out of the flow path. This reduces any pressure drop and allows the liquid or gas to flow freely without obstruction. Even under high pressure, the valve can create a tight, leak-free seal.

Key Features and Advantages of Triple Eccentric Butterfly Valves

Triple eccentric butterfly valves have several features that make them valuable in controlling the flow of fluids. Here are some key features:

Triple Eccentric Butterfly Valves vs Triple Offset Butterfly Valves

Applications of Triple Eccentric Butterfly Valves

Triple eccentric butterfly valves are commonly used in industries that need reliable sealing and efficient performance. These valves are versatile and can handle various tasks, making them suitable for different environments. Some common uses include:

Specifications

Size Range: NPS 3 to 48 / DN 80 to 1200. Larger sizes available upon request.
Body Materials: Carbon Steel, Stainless Steel. Other materials available upon request.
Temperature Range: From -320°F to 842°F (-196°C to 450°C). Higher temperature options available upon request.
Stem Materials: 17-4PH, 410 Stainless Steel, XM-19 (Nitronic 50)
Maximum Allowable Operating Pressure: ASME Class 150, 300, 600, 900. EN 1092 PN 10, 16, 25, 40, 63, 100, 150.
Seat Materials: 316 Stainless Steel, Hardened
Shutoff Rating:Zero Leakage
Disc Materials: Carbon Steel, Stainless Steel. Other materials available upon request
Body Style: Lug, Wafer, Double Flanged, Gate, Buttweld
Design Standard: API 609, ASME B16.34, ASME VIII, API 600
Flange Drilling: ASME B16.5, ASME B16.47, EN 1092, ISO 7005
Testing Standard: ISO 5208, EN12266-1, API 6D, API 598, BS 6755
Certifications: ABS, API 607, ATEX, CRN, ISO 10497, PED, PE(S)R, SIL, TR CU, TSG
Face to Face: API 609, ASME B16.10, ISO 5752, EN 558
Fugitive Emissions Standard: ISO 15848-1, API 641, TA Luft
Applications: Bulk liquid storage, oil & gas, LNG storage & transportation, steam distribution systems, power generation, geothermal steam, sugar & ethanol, pulp & paper liquor, refining, chemical processing, water & wastewater, air separation, cryogenic services.

Features & Benefits

We proudly offer the Tri Lok triple offset butterfly valve, an ideal choice for isolation in high-pressure applications, especially where zero leakage is essential. Compared to other valves of the same size and pressure class, Tri Lok provides space and weight savings, lowering installation and maintenance costs. The valve’s non-rubbing, metal-to-metal seal provides zero leakage with minimal torque and is certified fire-safe.

A key feature of the NTVAL Tri Lok is its splined disc/stem connection, allowing the disc to move independently of the stem. This design maintains the correct positioning of the seal ring and seat, even under temperature changes and pressure variations, preventing misalignment issues. The close tolerance engagement between the disc and stem reduces operational delays, offering maximum strength in demanding environments.

Triple Offset Geometry

A triple offset valve, or triple eccentric valve, has a stem offset on both the X (1) and Y (2) axes from the valve’s centerline, creating a cam-like motion. The third offset (3) is an inclined conical profile on the sealing surface, enabling the seat and seal ring to engage without interference. This design eliminates rubbing between the seat and seal ring, reducing wear and extending the valve’s lifespan.

When the seat and seal ring are fully engaged, torque is applied to create a bi-directional, metal-to-metal seal that prevents leaks. Because of this, triple offset valves are often referred to as “torque-seated” rather than “position-seated,” which is common in resilient or high-performance valves.

Components

Field-Replaceable Seat & Seal System: This system allows the seat and seal to be replaced on-site, extending the valve’s life, reducing downtime, and avoiding costly off-site repairs or full replacements.
Enhanced Seat Hardness: The hardened seat material reduces the risk of galling, offering superior durability, performance, and resistance to abrasion compared to other materials.
Metal-to-Metal Sealing: Tri Lok’s non-rubbing metal-to-metal sealing is fire-safe and tested to meet zero-leakage requirements for critical applications.
Seal Ring: Designed for flexibility with a range of materials, the seal ring provides torque-loaded, zero-leakage sealing. A solid seal ring option is also available.
Splined Disc-to-Stem Connection: This strong connection allows the stem to move independently of the disc, protecting against temperature and pressure effects, reducing hysteresis, and simplifying assembly and disassembly.
Adjustable Stem Packing: The stem seal system is fully adjustable and field-replaceable, certified to international fugitive emission standards.
Blowout-Proof Stem: The 1-piece stem includes a blowout prevention ring outside the pressure boundary, with redundant safety mechanisms conforming to API 609 standards.
Indexed Stem: Provides clear visual indication of the disc and seal ring position after installation.
Elongated Stem Bearings: Hardened bearings offer maximum support for the stem.
Increased Body Wall Thickness: In line with API 600, the thicker body wall provides additional corrosion resistance.
SIL 3 Capable: The Tri Lok valve meets SIL 3 requirements and is available in various automated packages to meet different SIL standards.

Standard Material List-Triple Offser Metal Seat

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Specs of Triple Eccentric Butterfly Valve

Material Construction

The Triple Eccentric Butterfly Valve features a durable build that handles high pressure and temperature. Its body is made from stainless steel, which resists corrosion and lasts a long time. The valve’s triple eccentric design reduces wear and tear, making it perfect for tough environments. This construction guarantees reliable performance over the valve’s lifespan.

Pressure and Temperature Ratings

NTVAL’s Triple Eccentric Butterfly Valve typically operates within a pressure range of up to 1500 PSI. It can handle temperatures ranging from -29°C (-20°F) to 600°C (1112°F), depending on the materials used for the valve and sealing components. These specifications make it suitable for high-pressure and high-temperature applications in various industries.

Actuation Options

These valves offer versatile actuation options, including manual, pneumatic, electric, and hydraulic methods. This flexibility allows for precise control over fluid flow, making it suitable for both manual operations and automated industrial processes. No wonder the ability to integrate with control systems enhances operational efficiency.

Features of Triple Eccentric Butterfly Valve

No Dead Zone Design

The valve boasts a no dead zone design, allowing complete fluid flow without any blockages. This design prevents buildup and reduces maintenance needs. It enhances the valve's efficiency and performance, making it an example of an ideal choice for systems requiring smooth and uninterrupted flow.

Bi-Directional Flow

Triple Eccentric Butterfly Valves are designed to handle flow in both directions. This bi-directional flow capability means the valve can effectively control fluid movement, regardless of the flow direction. This versatility makes it an excellent choice for systems that require flexible operation, enhancing overall efficiency and performance

Equilibrium Fixed Structure

The valve features an equilibrium fixed structure that balances pressure effectively. Think about that for a minute—this design helps maintain stable operation under varying pressure conditions. It contributes to the valve's durability and reliable performance in demanding environments.

Benefits of Triple Eccentric Butterfly Valve

Increased Efficiency

The 3 Way Plug Valve offers multiple flow paths, allowing for versatile fluid direction control. This feature enables the valve to manage complex piping systems efficiently. It stands out from the competition by providing flexibility in various industrial applications.

Reduced Maintenance

These valves reduce maintenance needs due to their sturdy construction and minimal wear on moving parts. With fewer parts requiring replacement, these valves experience less downtime, making them cost-effective over the long term. The reduction in maintenance not only saves time but also supports consistent performance in critical applications.

Improved Safety and Reliability

NTVAL Triple Eccentric Butterfly Valves improve safety and reliability by preventing the disc from sticking or jamming, even under extreme conditions. This consistent performance is essential for maintaining safe and continuous operations in various industrial settings.

Applications of Triple Eccentric Butterfly Valve

Refining and Petrochemical Process

The Triple Eccentric Butterfly Valve is essential in refining and petrochemical processes. It effectively controls the flow of various fluids, including crude oil and refined products. Its ability to handle high temperatures and pressures makes it ideal for these demanding applications.

Hot Gas Industry

The hot gas industry requires valves that can handle extreme temperatures. The Triple Eccentric Butterfly Valve excels in this area, managing the flow of hot gases without degradation. In other words, its durable construction delivers long-lasting performance, even under intense heat.

Hydrocarbon Processing

The hot gas industry requires valves that can handle extreme temperatures. NTVAL’s Triple Eccentric Butterfly Valve excels in this area, managing the flow of hot gases without degradation. Its durable construction delivers long-lasting performance, even under intense heat.

Marine and Offshore Applications

Triple eccentric butterfly valves are vital in marine settings, handling high-pressure fluids. Built for harsh conditions, they resist saltwater corrosion and temperature changes, ensuring leak-free, safe, and reliable operation on ships and offshore platforms.

3 Considerations When Buying Triple Eccentric Butterfly Valve

01 Flow Rate Requirements

The valve must handle the system’s maximum flow rate without causing pressure drops. By the way, in a water treatment facility requiring 500 gallons per minute, for example, the valve should accommodate this smoothly. Matching the valve size and design with flow characteristics is key to efficiency.

02 API AND ISO Certification

When purchasing a Triple Eccentric Butterfly Valve, it is important to consider whether the valve meets industry standards such as API and ISO certifications. These certifications ensure the valve has been tested and verified to meet strict quality, safety, and performance standards. Choosing a certified valve, like those offered by NTVAL, provides confidence in its reliability and suitability for critical applications.

03 Sealing Mechanism

The sealing mechanism is a key consideration when choosing a Triple Eccentric Butterfly Valve. For example, this type of valve uses a unique sealing method where the disc’s seating angle creates a tight seal without the need for excessive force. The valve must provide reliable sealing even under high-pressure conditions to prevent leakage and maintain system integrity.

FAQS About Triple Eccentric Butterfly Valve

Can NTVAL Provide Test Reports and Performance Data?

Yes, each valve offered will be delivered with a 3.1 certificate at no additional cost. NTVAL will send the certificate for approval before delivery.

Are There Minimum Order Requirements for Stainless Steel Globe Valves?

No, there is no strict minimum order requirement for Stainless Steel Globe Valves. Customers can purchase based on their specific project needs.

What after-sales service is provided if valves have quality issues?

We offer timely after-sales support to address any quality issues with the valves. Our team works closely with customers to resolve problems quickly and efficiently, making sure the valves perform as expected.

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Feature	Triple Eccentric Butterfly Valves	Triple Offset Butterfly Valves
Design	3 offsets: axial, radial, rotational	2 offsets: axial, radial
Sealing Performance	Superior sealing; minimal contact between disc and body	Good sealing; more contact compared to triple eccentric
Service Life	Longer service life due to reduced friction and wear	Shorter service life compared to triple eccentric
Operating Torque	Lower operating torque; less resistance	Higher operating torque; more resistance
Flow Resistance	Lower flow resistance; more efficient	Higher flow resistance compared to triple eccentric

	NO.	PART NAME		MATERIAL TO ASTM		QTY	REMARK
	1	BODY	A216-WCB	A217-WC9	A351-CF8M	–	–
	2	SEAT SURFACE	316 SS Faced	STELLITE NO.6Faced	Integral	1	Note 2
	3	DISC	A216-WCB+ENP	A217-WC9+ENP	A351-CF8M	1	Note1
	4	STEM	A479-410	A479-410	A564-630	1	–
	5	RETAINER RING	A479-410	A479-410	A479-316	1	–
	6	PACKING	Graphite	Graphite	Graphite	1	Set
	7	PACKING GLAND	A576-1020+Cr	A479-410	A479-316	1	–
	8	GLAND FLANGE	A105 or A576-1020(S20C)	A105 or A576-1020 (S20C)	A351-CF8	1	–
	9	GLAND BOLT	A193-B7	A193-B7	A193-B8	2/4	–
	10	NUT	A194-2H	A194-2H	A194-8	2/4	–
	11	BUSH BEARING	A479-304+Nitr	A479-316+Nitr.	A479-316+HCr.Plating	1	Note 1
STANDARD	12	KEY	A479-410	A479-410	A564-630	1	–
	13	SEALRING	316 SS+Graphite	316 SS+Graphite	316 SS+Graphite	1	Laminated
	14	TAPER PIN	410 SS	410 SS	A564-630	1	–
	15	YOKE	A576-1020(S20C)	A576-1020(S20C)	A576-1020+Zn.Plating	1	–
	16	YOKE BOIT	A193-B7	A193-B7	A193-B8	–	–
	17	YOKE NUT	A194-2H	A194-2H	A194-8	–	–
	18	MOUNTING BOLT	A193-B7 or EQ.	A193-B7 or EQ.	A193-B7 or EQ.	–	–
	19	SPRING WASHER	Steel	Steel	304 SS	–	–
	20	KEY	A576-1045	A576-1045	A576-1045	–	–
	21	GEAR BOX	Ductile	Ductile	Ductile	1	–
	22	CAP	A576-1020(S20C)	A240-304	A240-316	1	–
	23	GASKET(CAP)	304 SS+Graphite	304 SS+Graphite	304 SS+Graphite	–	Spiral wound
	24	THRUST BUSH	A479-410	A479-410	A479-316	–	–
	25	SEAT RETAINER	A576-1020+ENP	A240-304	A240-316	–	–
	26	RETAINER BOLT	A193-B8	A193-B8	A193-B8M	–	–
	27	BUSH BEARING	A479-304+Nitr.	A479-304+Nitr.	A479-316+HCr.Plating	–	Note1
	28	GASKET	304 SS+Graphite	304 SS+Graphite	304 SS+Graphite	1	Spiral wound
	29	HANDWHEEL	A53	A53	A53	1	–
	30	CAP BOLT	A193-B7	A193-B16	A193-B8	4/8	–
	31	CAP NUT	A194-2H	A194-4	A194-8	4/8	–
	32	SEALRING PIN	A479-304	A479-304	A479-316	1	–
	33	SPACER	A479-304	A479-304	A479-316	1	–
	2	SEAT SURFACE	Stellite No.6 Faced	Stellite No.6 Faced	Stellite No.6 Faced	1	–
	13	SEALRING	DuplexSS+GRAPHITE	DuplexSS+GRAPHITE	Duplex SS+GRAPHITE	1	Laminated
OPTION			A564-630 or 316 SS+Nitr	A564-630 or 316 SS+Nitr	A564-630 or 316 SS+Nitr	1	Solid Metal Ring
	34	LANTERN RING	410 SS	410 SS	316 SS	1
	35	PLUG	A105	410 SS	318 SS	1
		GREASE FITTING	Carbon Steel+Cr.Plating	316 Ss	316 SS	1
	36	DRAIN PLUG	A105	410Ss	316 SS	1
NOTES:1.Hardened by Nitriding:Hard Cr.Plating. ENP:Electroless Nickle Plating.
2.Class 150 &300:316 Faced Integral,Class 600&Over,Stelite No.6 Faced. 3.Recommended Spare Parts:Parts No.6,13,23 &28