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Butterfly Valves - A butterfly valve is a rotary motion valve.
 The main purpose of butterfly valve is used to stop, regulate, and start fluid flow. This type of valve is easily and quickly operated because there is a 90 degree rotation of the handle which moves the disk from a fully closed to fully opened position. Butterfly valves are available in various sizes and materials. Infact, the larger sized butterfly valves are actuated by hand wheels which are connected to the stem through gears and they provide mechanical advantage at the expense of speed.
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- Parts of a butterfly valve:
- The butterfly valve consists of only five main components. They are as follows:
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- Body: These valves have bodies that fit between two pipe flanges.
- Disc: The disk is the flow closure member of a butterfly valve.
- Stem: The stem of the butterfly valve is either a one-piece shaft or a two-piece, also known as split-stem design.
- Seat: The seat of a butterfly valve utilizes an interference fit between the disk edge and the seat to close or to shutoff.
- SOperator
- Uses of Butterfly valves:
- Butterfly valves are considered to be the most economical and reliable type of pipe valves. Technological innovations combined with the simple design of the butterfly valve has made it a dependable, economical and flexible solution to a variety of industrial flow control needs. These valves have many advantages over other valves like gate, globe, plug, and ball valves, especially in large valve applications. The most obvious advantages are savings in weight, space, and cost. The maintenance cost is low because there are a less number of moving parts and there are no pockets to trap fluids. They are widely used in water distribution and waste water processing.
D71X wafer soft seat butterfly valve
 - Main dimension unit:mm
- Note:the pressure rating is 1.0MPa or 1.6MPa for the valve.
Flanged type three offset Butterfly valve
 - Specification:
- Structre type:double flanged three eccenticity
- Design standard:API609-83
- flange connection dimension:ANSI B 16.5
- Flange drilling:ISO5211.
- Structure length:ANSI B 16.10-1992
- Pressure test:API 598-82
- Materials
- Body: WCB,CF8M
- Dise: WCB,CF8M
- Stem: 416Cr13Cr18Ni9Ti
- Seal ring: 316, Fluorine plastic
- Packing: Flesxible graphite, fluorine, plastic
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Lug type double offset Butterfly Valve
 - Specification:
- Structure type: Double eccentric wafer butterfly valve
- Design standard: API609-83
- flange connection dimension: DIN2501(DIN2534＿ISO2084)
- Structure length: DIN3202-K1,BS5155,
- ANSI B16.10,MSS SP-67
- Pressure test: API 598
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- Materials:
- Body: WCB,CF8M
- Dise: WCB,CF8M
- Stem: 416Cr13Cr18Ni9Ti
- Packing: Flesxible graphite, fluorine, plastic
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- This kind of butterfly valve is widely utilized in foodstuff,pharmacy,
chemical industry etc.and industrial environmental protection,
water treatment, high building, water supply and drain tubing line
open or close or adjusting medium.
Tripe Eccentric Butterfly Valve
 - Three-dimensional incline taper airproof seat 900 openinger cleaning triple eccentric,Bereled wedgedisc small friction and torque,self-clean manual,electric,pneumatit and gear operation etc.
- A216WCB,A351 CF8,A351CF8M
- A217LCB,A351 CF3,A351CF3M
- Technical requirements
- 1.Design and manufacture comply to MSS SP 67-1997
- 2.Inspect and test comply to API 598
- 3.Face to face dimetion complies to BSS5155
- 4.Flanges comply to API 605
- 5.Pressure-remperature grade complies to ANSI B6.34
- Trip eccentric butterfly valve:
Sleeve Type Soft Sealing Plug Valve Acc.To ANSI
 - Main structural features:
- Bolt cover,plug 90 degree around.
- Its sealing is realized by the sealing face around the sleeve.It has unique 360 degree metal edge for protection and fixing of the sleeve.There is no cavity in the valve for accumulation of medium.Metal edge provides the function of self-cleaning when the plug is rotated,applicable to the operation condition thatis glutinous and apt to smudge.Double direction.
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- Standards compliance:
- Design and Manufacture: API 599,API 6D
- Face to face(end to end): ANSI B 16.10
- Flanged connection: ANSI B16.5
- Test and inspection: API 598,API 6D
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- Main pants materials
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- Sleeve type soft sealing plug valve
- ANSI Butterfly valve:Class 150LB-300LB SIZE 2"~60"
- DIN Butterfly valve:DN50-DN600, PN10~PN25
- JIS Butterfly valve:DN50-DN600 10K~20K
- BS Butterfly valve:DN50 -DN600, PN10~PN25
- Design & Manufacture Standard:API600, API 6D,ASME B16.34, JISB2071, JISB2073,JISB2083, BS 1873,BS1414
- Face to Face Standard: ASME B16.10,DIN 3202,BS2080, API 6D, JISB2002
- End Connection Standard:ASME B16.11,ASME B1.20.1,ASME B16.5, DIN2543-2550 ,JISB2212-JISB2214
- Test Standard:ISO5208,BS 6755, API598,API 6D,JISB2003
- Material:WCB,LCB,WC6,WC9,C12,C5,CF8,CF3,CF3M,CF8M,A105,LF2,F11,F22,F5,F304,F316,F304L,F316L
Type of Valves: A valve is a piping components complete with operating system, able to control or shut off a fluid flow Valves are divided in:- Ball Valve,
Butterfly Valve,
Check Valve,
Gate valve,
Globe Valve,
Plug Valve,
Power Station Valves,
Y-Type Strainer,
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Main parameter of the 
