API Lug Type Stainless Steel Butterfly Valve with Gearbox
Basic Info
Model No.: TD373W
Product Description
Model NO.: TD373W Connection Form: Lug Support Seal Form: Force Sealed Work Pressure: 150lb/300lb Material of Seal Surface: Metal Hard Sealed Application: Water,Oil,Air Body Material: Wcb/304/316 Place of Origin: Wenzhou Specification: CE HS Code: 8481804090 Driving Mode: Manual Structure: Three-Eccentric Sealing Valve Stem: Normal Working Temperature: Normal Temperature (-40°CAPI Lug Type Metal Seated Stainless Steel Butterfly Valve with Gearbox
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a Ball Valve, which allows for quick shut off. Butterfly Valves are generally favored because they are lower in cost to Other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.
There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating. The high performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the triple offset butterfly valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat. In the case of triple offset valves the seat is made of metal so that it can be machined such as to achieve a bubble tight shut-off when in contact with the disc.
Lug-style valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.
A lug-style butterfly valve used in dead end service generally has a reduced pressure rating. For example a lug-style butterfly valve mounted between two flanges has a 150 psi pressure rating. The same valve mounted with one flange, in dead end service, has a 75 psi rating.
Technical Specifications
Test Pressure
Main Parts & Materials
Company Overview
Zhejiang Wenbao Valve Technology Co.,Ltd was established in 1985. The main products range are as following: Fully Welded Ball Valve,1PC/2PC/3PC Flanged Ball Valve, Threaded Ball Valve, Mini Ball Valve, High Pressure Ball Valve, Pneumatic Ball Valve, Electric Ball Valve, Sanitary ball valve, Ball valve with mounting pad and other valves like gate, globe, Check Valves and Strainer, etc. Main material include: Stainless steel, Cast Steel, Forged Steel and Brass, etc. The products manufactured as per API, ANSI, JIS, ISO, BS, JB and GB, and have CAD valve design and quality testing center. The products are widely used in chemical industry, oil, metallurgy, light industry, electric power, food, pharmacy, civil industry, fiber industry, liquefied natural gas, liquefied petroleum gas, steel mills, heating pipes, etc. Our company passed the ISO 9001:2008, Standards Organization of Nigeria(SON), International Quality Award Certificate, Manufacture License of Special Equipment, KC of South Korea,CE of Europe, etc.
Contact us if you need more details on Lug Butterfly Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Butterfly Valve、Stainless Steel Butterfly Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a Ball Valve, which allows for quick shut off. Butterfly Valves are generally favored because they are lower in cost to Other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.
There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating. The high performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the triple offset butterfly valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat. In the case of triple offset valves the seat is made of metal so that it can be machined such as to achieve a bubble tight shut-off when in contact with the disc.
Lug-style valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.
A lug-style butterfly valve used in dead end service generally has a reduced pressure rating. For example a lug-style butterfly valve mounted between two flanges has a 150 psi pressure rating. The same valve mounted with one flange, in dead end service, has a 75 psi rating.
Technical Specifications
| Design & Manufacturer | Face-to-Face | Flange Dimensions | Test & Inspection |
| API | ANSI B16.10-2002 | ANSI16.5-2004 | API598-2004 |
Test Pressure
| Nominal Diamater DN(mm) | 830W | 830L | |
| 2"-36" | 2"-36" | ||
| Nominal Pressure PN(lb) | 150 | 300 | |
| Test Pressure (Mpa) | Shell test | 3 | 7.5 |
| Sealing test | 2.2 | 5.5 | |
| Suitable Medium | water, steam, oil, sea water, etc | ||
| Applicable Temperature | -29ºC~36ºC | ||
Main Parts & Materials
| Part Name | Material |
| Body | WCB,304,316,316SS,CF8M |
| Disc | WCB,304,316,316SS,CF8M |
| Stem | 316,2Cr13,1Cr18Ni9Ti |
| Seat Ring | 316, PTFE |
| Packing | Soft graphite, PTFE |
Company Overview
Zhejiang Wenbao Valve Technology Co.,Ltd was established in 1985. The main products range are as following: Fully Welded Ball Valve,1PC/2PC/3PC Flanged Ball Valve, Threaded Ball Valve, Mini Ball Valve, High Pressure Ball Valve, Pneumatic Ball Valve, Electric Ball Valve, Sanitary ball valve, Ball valve with mounting pad and other valves like gate, globe, Check Valves and Strainer, etc. Main material include: Stainless steel, Cast Steel, Forged Steel and Brass, etc. The products manufactured as per API, ANSI, JIS, ISO, BS, JB and GB, and have CAD valve design and quality testing center. The products are widely used in chemical industry, oil, metallurgy, light industry, electric power, food, pharmacy, civil industry, fiber industry, liquefied natural gas, liquefied petroleum gas, steel mills, heating pipes, etc. Our company passed the ISO 9001:2008, Standards Organization of Nigeria(SON), International Quality Award Certificate, Manufacture License of Special Equipment, KC of South Korea,CE of Europe, etc.
Contact us if you need more details on Lug Butterfly Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Butterfly Valve、Stainless Steel Butterfly Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.
Product Categories : Butterfly Valves
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