Note£º
¡¡¡¡DN50£¨2")-600(24")Type"Lug"butterfly valves are suitable for the pressure grade of PN1.0MPa separately.Two dimensions in one culumn show the connection dimensions of PN1.0/PN1.6MPa pressure grade.The upper flanges of the butterfly valves accommodates all types of operaters:manual,wormgear,electric and pneumatic actuators.
¡¡¡¡The dimensions D1 and n-? of DN50£¨2")-500(20")lised in above table show the installation dimensions of butterfly valve. Of them the dimensions D1 and n-? of DN50£¨2")-350(14")Contain the standard of GB/T9112-1988£¬DIN2501(Germang),BS4504(UK) ISO2084,ISO253(International standard) BS10-E(UK) ANSI125(USA)for flange connection and DN400£¨16")-500(20") contain the standard of GB/T9112-1988£¬DIN2501,ISO2084 and bs4504
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Nots:Suitable for Gear Operators,electric and pneumatic control actuators.
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In order to well ensure the sealing property for valve,must ensure flange to be private use for wafer & Lug Butterfly Valve.
Please present the following technical data,if consumer want our company to provide flange.
1.Side flange mounting standard
2.Nominal diameter and outer diameter of pipes
3.Nominal pressure
4.Flange type
5.Sealing surface shape
6.Flange material
Cv=where valve entirely opened,pressure difference in both sides of valve will be 1 pound/inch2,when fluid is 60¡ãF clean water,flow volume of per gallon/min,flowing through valve.
Whereas:G=Specific gravity,clean water will be 1.0
¡¡¡¡¡¡¡¡Q=Max.flow rate
¡¡¡¡¡¡¡¡¦¤P=pressure difference,1b/1n2
C=The valve Cv is the flow rate(m3/h)of pure water at normal temperature passing through the valve when the valve disc is fully opened and the pressure differential between the two ends of the valve is 100KPa(1Kg/cm2),
Cv=1.17C |
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Note:Performance curve of flow volume means the relationship between open degree of valve and flow volume,normally butterfly valve suitable to use in control flow.When valve's open degree under 30¡ã,not recommend to use in flow volume control.
¡¡¡¡In order to ensure your requirement for usage,pless explain in detail in your order:Type,specification,material,nomial pressure,working pressure and temperature used,maximum flow rate,pressure difference,medium composition of valve,driving type of valve and standard for connection of valve with pipes etc.
For the convenience usage of consumers ,our company can provide flange and bolts completed with valve,and will provide wearing parts according to the requirement of consumers .In selection of product types,consumer can present his requirement for product material,connection standard and technical data and give clear declaration in your contract.
Our company also can carry out study and development on new product according to requirement of consumer. |
On-line replacement of top seal:Easy installation and maintence
