High Performance Triple Offset Butterfly Valves

• Media: Oil
• Driving Mode: Electric
• Connection Form: Flange
• Structure: Double-Eccentric Sealing
• Seal Form: Force Sealed
• Valve Stem: Normal
• Model NO.: AOC-3812
• Work Pressure: High Pressure (10.0mpa< Pn <80.0mpa)
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Metal Hard Sealed
• Valve Body: Forge Welding
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Body Size: 3′′(80A)-24′′(600A)
• Body Rating: ANSI Class 150-600 Pn10-Pn110
• Valve Model: DN80/Port DN 80mm
• Connection: ANSI 150 /Sh-T3406-2022
• Flow Characteristic: on-off
• Body Mat.: A216 Wcb
• Actuator: at Da85
• Stem Mat.: 17-4pH H900
• Seat Mat./Packing: PTFE
• Bonnet Type: Standard
• Air Supply: 0.4MPa
• Valve Stroke: 90 Degree
• Leakage Class: ANSI B16.104V
• Yoke Material: A216 Wcb
• Temp. Range: -20~200 Degree
• Transport Package: Bubble Bags and Wooden Box
• Specification: 110.00cm * 110.00cm * 90.00cm
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

 

About SNT Butterfly Valves

^{The company has unique design, advanced processing and more than 10 years of experience in exploring and manufacturing butterfly valves We can supply the solution for al kinds of complicated and severe service conditions. Our butterfly valves has strong market competitiveness and the design meets international standards likes ASME B16.34-2009. GB/T12221 -1989 and ap1607-2009 This series of products si widely applied ot petroleum, chemical industry, light industry, pharmacy, paper making, metallurgy, rubber industry etc.}
AOC-3812 series tripple offset butterfly valve provides a bi-directional bubble tight shut-off. This geometry ensures ,
that the disc seal contacts the body seat only at the finalshut-off position without rubbing or galling, providing a torque j
generated resilient seal with sufficient "wedging" to ensure 

 

 

Product Specifications

 

Body Type	AOC-3811			AOC-3812
Body Size	3''(80A)-24''(600A)			3''(80A)-24''(150A)
Body Rating	ANSI Class 150-600 PN150-600 PN10-PN110
Fluid Temperature	-196~+500ºC			-196~+500ºC
Connections	Wafer Type/RF/Lug Type			RF Flanged
Body Materials	A216 WCB/A351 CF8/A351 CF8M,etc
Disc Materials	A216 WCB/A351 CF8/A351 CF8M,etc
Disc Treatment	Chrome Plated or Stellited
Range-ability	60 degree Opening/25:1; 90 degree Opening/50:1
Flow Characteristiscs	Approximater Eq%(Inherent Characteristic)
Seal Ring Type	FN	FV	CS	KS	FM	M
Seal Raing Materials	R.TFE	R.TFE	R.TFE	Kel-F	316+Graphite	316SS
Back Ring Materials	NBR	VITON	SUS316	SUS316	316SS	316SS
Seat Leakage	ANSI Class IV/V/VI			ANSI Class VI  Actuator Combinations
Actuator Combinations	Pneumatic Cylinder Actuator/Electronic Actuator/Pneumatic Diaphragm Actuator

Principle Of Operation

 

Principle Of Operation

SNT tripple offset butterfly valve provides a bi-directional bubble tight shut-off. This geometry ensures that the disc seal contacts the body seat only at the final shut-off position without rubbing or galling ~ providing a torque generated resilient seal with sufficient "wedging" to ensure a uniform seal contact.

The Triple Offset Geometry

Offset 1- The shaft is offset behind the seat axis to allow complete sealing contact around the entire seat.
Offset 2 - The shaft centerline is offset from the pipe and Valve which provides intgerference free opening and closing of the valve.
Offset 3 - The seat cone axis is offset from the shaft cen-terline to eliminate friction during closing and opening and to achieve uniform compressive sealing around the entire seat.
 

Valve Construction

 

Design of tripple-eccentric: It is ap- plicable to the severe service conditions of high temperature and pressure, as well as low leakage During opening or closing, it features non-friction and low torque. The larger the fluid force is, the better the sealing is.

Integral structure of seat ring and body: the sealing face surfacing by high- strength alloy can guarantee the reliability
of sealing face and prolong service life, so as to near to non-maintenance.

Stepped sealed for anti-blowing out: It can guarantee the security meanwhile the integral stem of high strength material can improve the allowable pressure drops.

The driving method of stem and disk uses offset of round pin: It can avoid the strength of stem decreasing for drilling, thereby ti can improve the shearing strength of round pin, as well as reliability and security.

Design of Stem sealing: stem sealing of high temperature resistant non-metallic material can prevent the fluid with particles from entering bearing, so as to avoid locked or jammed.

Belleville springs-dynamic loading and Compensation: the packing system uses dynamic loading and compensation of Belleville springs the hole of packing box uses rolling and pressing, the stem is processed by, which can eliminate the packing emission to meet ta-luft standard.

Various sealing selection: ncluding multi-layer composite sealed, multi layer all-metal sealed and integral al- metal sealed. ti makes a choice according to the different service conditions. multi-layer composite sealed features flexibility to get better fitting between seat ring and sea ring, so as to meet ANSI VI leakage class.

Thrust colar: Stem protecting thrust collar can avoid the dead angle area between stem and body accumulated by particles or coking substance, so as to the stem jammed. Flowing ni reverse, it can prevent stem from rational displacement for fluid force, as so to cause the larger leakage.

Convenient maintenance: High precision of parts and components on-
site regulation and replacement of seal rings.
 

Production application

 

 

 

Company Profile

SNT Machinery(Qingdao) Co. , Ltd is a producer of control valves, combines manufacturing, designing, sales and services in one. It has high starting point quick development SNT is located in Qingdao, Shandong province with an area for 42000m2, equipped with modern workshop and production equipment. It is a high-tech enterprise with independent intellectual property rights and imported advanced management and production experience. Now it has more than 150 workers, and R&D specialist accounts for 15%, graduates or with higher degrees account for 30%. Depending on high quality production management team and innovative technology research and development, now we produce large quantities of high quality vales used in petrochemical, oil and coal chemical industries. We have a sales value to nearly 100billion in the year 2017.

Now SNT has got the TS special equipment manufactuuring certificate and ISO 9001, and has acquired the net qualification certificate of SINOPEC,CNOOC, PETROCHINA and SINOCHEM. And we have got the National Patent in many technologies. We can design and manufacture all series of valves according to ANSI, API, DIN, BS, JIS standards. Combining the advantages of famous valves all cross the world and with independent research and development, until now we can manufacture all kinds of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric  Rotary Valves, T Three-eccentric Center Butterfly 
Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogennic Valves tc,  Driving form includes manual operation, power-drinven, pneumantic and hydraulic drive. Materials for main parts are A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M etc. Specification 1/2"~120", working pressure ANSI 150#~2500#, working temperature -196ºC~1100ºC.

Relying on advanced production technology management and qulity assurance system, SNT Valves have been widely used in petrochemical, oil, steel&iron, paper manufacturing and power station industries. Our customers include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINC Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, Jinan branch etc.

We make user's profits as our priority, devoting ourselves to the establishment of excellent quality and good brand, Our perfect quality assurance and after-sales systems guarantee that SNT valves join hands with all our customers and creat prosperity.