Basic Info.
A butterfly valve is from a family of valves calledquarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is ametaldisc 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 tothrottleflow.
There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero-offset butterfly valve, which uses the flexibility ofrubber, 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.
Technology : | Investment Casting |
Main Materials: | SS304, SS316,CF8M,CF8 |
Working pressure: | PN16-PN63, 150LB-900LB |
Applicable temperature: | -20~210 degree centigrade |
Name | OEM stainless steel investment casting parts Material |
Material | 304,306 ,2205stainlesssteeletc, |
Designs | 1.Asperthecustomer'sdrawings |
2.Asperthecustomer'ssamples | |
Surfacetreatment | 1. mirror polish |
2. passivation | |
Service | OEMserviceavailable |
Products | Allkindsofstainlesssteelcasting:include pipe fitting, ball valve, automotiveparts,railroadparts,medicalparts,marineparts,lightingparts,pumpbody,valveparts,architecturalpartsandfurniturepartssoon |
Advantage | 1. More than 10 yearsexperience instainlesssteelcasting; |
2. NearTianjin PortandTianjin Airport; | |
3. Weprovide:OEMstainlesssteellostwaxcastingsandOEM machiningservicesforstainlesssteellostwaxcastings. Wehave:CNCMachining,CNCturning,CNCMilling,3DCMM InspectionandCNCOpticalInspection. Webelieve:ontime,stablequality,justprice,clientconfidentiality. | |
4. Withsamplesandorder:Wecanofferdimensionreport,materialcertification. | |
Inspection: | 1.Dimensionreport |
2.Materialcertification | |
Packing: | Exportcartonandfumigationwoodenpall |