SISCO FLOW CONTROL CO.,LTD
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U-Type Resilient Seated Butterfly Valve


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PRODUCTION CAPABILITY AND CERTIFICAFE     


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FIELD OF APPLICATION

 

 


      Chemical 

      Beverage

      Brewing/Wine Making 

      Pharmaceutical

      Food Processing

      Petroleum Refining& Oilfield 

      Transportation

      Ultrapure Water

      Water & Wastewater Treatment 

      Marine

      Pulp & Paper 

      Mining 

      Power/FGD 

      Nuclear Power 

      Irrigation 

      Textile 

      Desalination


  

DESIGN FEATURES

 

 

      1.Bi directional bubble tight shut off , zero leakage.

      2.Full EPDM lined valve interior isolating the pipeline media from the body.

      3.Dry shaft feature isolating the pipeline media from the shaft and therefore standard shaft material can be used.

      4.Smaller operating torque.

      5.Light weight and volume lowering cost and achieving easy instal- lation.

      6. Full bore feature results in higher Cv value.

 

GENERAL FEATURES


      Body

      One piece full double flanged style. All bodies are drilled to be compatible with AWWA C207, ANSI B 16.1, ASME 125/150, PN 10 0r other international flange standards.


      Seat

      The replaceable tongue and groove resilient seat ensures lower torque and provides complete isolation of flowing medium from all valve components (excluding the disc) by a totally encasing design. Molded seat 0-ring provides seal between valve and pipe flanges which eliminates requirements of flange gaskets. EPDM is the abbreviated name for Ethylene  Propylene  Diene  Monomer.  In general industry, one may see other abbrevi ations or trade names used in lieu of EPDM such as EPT, Nordel, ECD, or EPR. Typically these are the same materials as EPDM. EPDM is a standard seat material offered in SISCO resilient-seated butterfly valves. It is the most universal and economical  of  seat  materials offered by SISCO; that is, it may be used in a wider range of applications than BUNA-N.

     

      Disc

     The high strength casting discs are casted by once, the sea ling edges are spherically machined, and then han  polished to  pro-vide 360°concentric seating bi-directional bubble-tight shut  off, minimum  torque  and longer seat life. The symmetrical disc profile enhances valve  performance by increasing the Cv valves, reducing turbulence and increasing pressure recovery. The disc O.D. clearance is designed to work with all standard  piping.



      Shaft

      Alternative to high corrosion resistance shaft materials, RBV030 is equipped with the dry 

shaft design because of its concentric nature and axial sealing design, where shaft with standard materi-al is completely isolated from the flowing media. 

      One shaft pin-less and  double  shafts  pin-less  design  are  available to be chosen depending on customers' preference. Precision machining of the disc and the stem connection minimizes hysteresis and produces maximum strength engagements. 

      All stem designs incorporate a blow-out proof feature. 

      Both disc/stem designs inherently provide complete protection from particle entrapment and bacterial decay, protection that is required for sanitary performance. For superior erosion and abra- sion resistance, the one-piece disc/stem is fully encased in either EPDM Or BUNA-N. 

      For double shafts pin-less design, precision double "D" or "Square”.

      

      Stem Bearing

      Upper and lower heavy wall sleeve self-lubricating bearings (PTFE Or bronze) are utilized to absorb actuator side thrust and minimize bearing friction torque.

 

      Vertical Thrust Bearing

      A bronze axial thrust bearing carries the disc weight when installed with shaft in vertical position and eliminates disc displacement due to the weight of the stem and disc.

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